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CARBON-BASED REACTIVE BARRIER FOR NITRATE REMEDIATION AT A FORMER SWINE CAFO |
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Nitrate (NO3-) is a common ground water contaminant related to agricultural activity, waste water disposal, leachate from landfills, septic systems, and industrial processes. This...
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& Source apportionment of particulate matter in the United States and associations with lung inflammatory Markers |
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Size-fractionated particulate matter (PM) samples were collected from six U.S. cities and chemically analyzed as part of the Multiple Air Pollutant Study. Particles were administer...
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µ-XANES AND µ-XRF INVESTIGATIONS OF METAL BINDING MECHANISMS IN BIOSOLIDS |
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Micro-X-ray fluorescence (µ-XRF) microprobe analysis and micro-X-ray absorption near edge spectroscopy (µ-XANES) were employed to identify Fe and Mn phases and their asso...
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"EFFECT OF NON-TARGET ORGANICS ON ORGANIC CHEMICAL TRANSPORT." |
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NRMRL/IO
BOOK
NRMRL-CIN-1363
Enfield*, C.G., Lien*, B.K., and Wood*, A.L. "Effect of Non-Target Organics on Organic Chemical
Transport."
Published in: Humic Subs...
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"GREENER" CHEMICAL SYNTHESES USING AN ALTERNATE REACTION CONDITIONS OR AQUEOUS MEDIA |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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"GREENER" CHEMICAL SYNTHETIC PROCESSES USING ENZYMATIC, MECHANOCHEMICAL MIXING, OR MICROWAVE AND ULTRASOUND IRRADIATION |
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Several newer strategies, such as solvent-free (dry media), solid-supported with and without microwave (MW) irradiation, and mechanochemical mixing (grinding); and the use of room ...
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( DETROIT, MI ) STUDY DESIGN AND PRELIMINARY EXPOSURE FINDINGS ASSOCIATED WITH THE DEARS |
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The Detroit Exposure and Aerosol Research Study (DEARS) is a three-year field monitoring study initiated in 2004 that is designed to measure exposure and describe exposure relation...
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(TUCSON) STUDY DESIGN AND PRELIMINARY EXPOSURE FINDINGS ASSOCIATED WITH THE DEARS |
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The Detroit Exposure and Aerosol Research Study (DEARS) is a three-year field monitoring study initiated in 2004 that is designed to measure exposure and describe exposure relation...
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12 WEEK EXPOSURE TO CARBONYL SULFIDE PRODUCES BRAIN LESIONS AND CHANGES IN BRAINSTEM AUDITORY (BAER) AND SOMATOSENAORY (SEP) EVOKED POTENTIALS IN FISCHER 344N RATS |
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Carbonyl sulfide (COS) is a chemical intermediate in the production of pesticides and herbicides, is a metabolite of carbon disulfide, is produced by the combustion of organic mate...
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13C AND 15N IN MICROARTHROPODS REVEAL LITTLE RESPONSE OF DOUGLAS-FIR ECOSYSTEMS TO CLIMATE CHANGE |
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Understanding ecosystem carbon (C) and nitrogen (N) cycling under global change requires experiments maintaining natural interactions among soil structure, soil communities, nutrie...
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1985 |
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The white rot fungus Phanerochaete chrysosporium degraded DDT[1,1-bis(4-chlorophenyl)2,2,2-trichloroethane], 3,4,3'4'-tetrachlorobiphenyl, 2,4,5,2',-4'5'-hexachlorobiphenyl 2,3,7,8...
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3-D QSAR ANALYSIS OF INHIBITION OF MURINE SOLUBLE EPOXIDE HYDROLASE (MSEH) BY BENZOYLUREAS, ARYLUREAS, AND THEIR ANALOGUES. (R825433) |
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Two hundred and seventy-one compounds including benzoylureas, arylureas and related compounds were assayed using recombinant murine soluble epoxide hydrolase (MsEH) produced fro...
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A BENCH SCALE STUDY ON BIODEGRADATION AND VOLATILIZATION OF ETHYLBENZOATE IN AQUIFERS. (R825549C039) |
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Experiments were conducted to investigate the fate of ethylbenzoate and soil microorganisms in shallow aquifers. Biodegradation and volatilization have been identified as the ma...
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A BIOVENTING APPROACH TO REMEDIATE A GASONLINE CONTAMINATED SUBSURFACE |
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Bioventing is a subsurface process using an air stream to enhance biodegradation of oily contaminants. wo pilot-scale bioventing systems were installed at a field site. rocess oper...
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A CARBON STARVATION SURVIVAL GENE OF PSEUDOMONAS PUTIDA IS REGULATED BY S54. (R825689C071) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A CASE STUDY OF FUNCTIONAL, MORPHOLOGIC AND MOLECULAR EFFECTS: CARBON DISULFIDE |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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A CASE STUDY OF THE LOS ANGELES COUNTY PALOS VERDES LANDFILL GAS DEVELOPMENT PROJECT |
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This report documents the first-ever-attempt to capture sanitary landfill gases and beneficiate them to natural gas pipeline quality--or very nearly so. For this reason the authors...
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A CASE STUDY OF THE REFERENCE CONDITION APPROACH TO NITROGEN MANAGEMENT IN ESTUARIES |
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One way to estimate estuarine response to changes in nitrogen loading in coastal systems is by using a reference approach. This talk details the application of paleoecological anal...
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A CHAMBER AND MODELING STUDY TO ASSESS THE PHOTOCHEMISTRY OF FORMALDEHYDE |
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A new analytical method for formaldehyde (HCHO) was implemented for use in the UNC outdoor smog chamber. CHO measurements obtained with this method were compared with those obtaine...
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A COMAPRISON OF MERCURY IN MINK AND FISHER IN RHODE ISLAND |
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Comparison of total mercury concentrations and nitrogen and carbon stable isotope values in muscle tissue and stomach contents of mink (Mustela vison) and fisher (Martes pennanti) ...
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A COMPARISON OF MAPPED ESTIMATES OF LONG-TERM RUNOFF IN THE NORTHEAST UNITED STATES |
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We evaluated the relative accuracy of four methods of producing maps of long-term runoff for part of the northeast United States: MAN, a manual procedure that incorporates expert o...
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A COMPARISON OF PHOSGENE FORMATION FROM ADSORPTION OF CARBON TETRACHLORIDE ON OXYGEN MODIFIED IR(111) AND OXYGEN MODIFIED IR(110). (R826694C626) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A COMPARISON OF PHOSGENE FORMATION FROM ADSORPTION OF CARBON TETRACHLORIDE ON OXYGEN MODIFIED IR(111) AND OXYGEN MODIFIED IR(110). (R828598C802) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A COMPARISON OF THE UCD/CIT AIR QUALITY MODEL AND THE CMB SOURCE-RECEPTOR MODEL FOR PRIMARY AIRBORNE PARTICULATE MATTER. (R831082) |
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Source contributions to primary airborne particulate matter calculated using the source-oriented UCD/CIT air quality model and the receptor-oriented chemical mass balance (CMB) ...
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A COMPREHENISVE NONPOINT SOURCE FIELD STUDY FOR SEDIMENT, NUTRIENTS AND PATHOGENS IN THE SOUTH FORK BROAD RIVER WATERSHED IN NORTHEAST GEORGIA |
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There is an urgent need for EPA to develop protocols for establishing Total Maximum Daily Loads (TMDLs) in streams, lakes and estuaries. A cooperative TMDL field data collection p...
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A COMPREHENSIVE NONPOINT SOURCE FIELD STUDY FOR SEDIMENT, NUTRIENTS AND PATHOGENS IN THE SOUTH FORK BROAD RIVER WATERSHED, GEORGIA |
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There is an urgent need for EPA to develop protocols for establishing Total Maximum Daily Loads (TMDLs) in streams, lakes and estuaries. A cooperative TMDL field data collection p...
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A CRADLE TO GATE LIFE CYCLE ANALYSIS OF THE BIOPOLYMER POLYLACTIC ACID: LOOKING BEYOND GLOBAL WARMING AND FOSSIL FUEL USE |
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Derived from corn, the biopolymer polylactic acid (PLA) has recently emerged in the marketplace and is advertised as a sustainable alternative to petroleum-based polymers. Researc...
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A DIAGENETIC MODEL FOR SEDIMENT-SEAGRASS INTERACTIONS |
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The objective of this modeling effort was to better understand the dynamic relationship between seagrass beds and their sedimentary environment using a diagenetic model. The model...
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A DISTURBANCE IN THE LAKE ONTARIO BENTHOS |
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Benthic invertebrates play a critical role in the Lake Ontario ecosystem including carbon transfer up the food chain and cycling of nutrients between the sediments and water....
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A FEASIBILITY STUDY FOR THE COPROCESSING OF FOSSIL FUELS WITH BIOMASS BY THE HYDROCARB PROCESS |
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The report describes and gives results of an assessment of a new process concept for the production of carbon and methanol from fossil fuels. The Hydrocarb Process consists of the ...
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A FIELD TEST USING COAL:DRDF BLENDS IN SPREADER STOKER-FIRED BOILERS |
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This program was conducted to characterize and demonstrate the technical, economic, and environmental feasibility of combustion densified forms of refuse derived fuel (dRDF) blende...
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A FIELD VALIDATION OF TWO SEDIMENT-AMPHIPOD TOXICITY TESTS |
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A field validation study of two sediment-amphipod toxicity tests was conducted using sediment samples collected subtidally in the vicinity of a polycyclic aromatic hydrocarbon (PA...
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A FUNCTIONAL GROUP CHARACTERIZATION OF ORGANIC PM 2.5 EXPOSURE: RESULTS FROM THE RIOPA STUDY |
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The functional group (FG) composition of urban residential outdoor, indoor, and personal fine particle (PM2.5) samples is presented and used to provide insights relevant...
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A GAS-EXCHANGE SYSTEM FOR ASSESSING PLANT PERFORMANCE IN RESPONSE TO ENVIRONMENTAL STRESS |
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Anthropogenic stresses are increasingly common as environmental factors affecting the performance of plants in both natural and agro-ecosystems. There is a need to determine how th...
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A KINETIC MODEL FOR H2O2/UV PROCESS IN A COMPLETELY MIXED BATCH REACTOR. (R825370C076) |
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A dynamic kinetic model for the advanced oxidation process (AOP) using hydrogen peroxide and ultraviolet irradiation (H2O2/UV) in a completely mixed batch ...
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A LABORATORY STUDY TO INVESTIGATE GASEOUS EMISSIONS AND SOLIDS DECOMPOSITION DURING COMPOSTING OF MUNICIPAL SOLID WASTE |
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The report gives results of a materials flow analysis performed for composting municipal solid waste (MSW) and specific biodegradable organic components of MSW. (NOTE: This work is...
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A LAGRANGIAN PHOTOCHEMICAL AIR QUALITY SIMULATION MODEL: ADAPTATION TO THE ST. LOUIS - RAPS DATA BASE. VOLUME I. MODEL FORMULATION |
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A Lagrangian photochemical air quality simulation model has been adapted to the St. Louis, Missouri/Illinois metropolitan region and the Regional Air Pollution Study (RAPS) aeromet...
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A LAGRANGIAN PHOTOCHEMICAL AIR QUALITY SIMULATION MODEL: ADAPTATION TO THE ST. LOUIS - RAPS DATA BASE. VOLUME II. USER'S MANUAL |
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A set of instructions have been compiled for use of a Lagrangian photochemical air quality simulation model adapted to the St. Louis, Missouri/Illinois metropolitan region and the ...
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A LYSIMETER STUDY TO INVESTIGATE THE EFFECT OF DAIRY EFFLUENT AND UREA ON CATTLE URIN N LOSSES, PLANT UPTAKE, AND SOIL RETENTION |
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Loss of nitrate (NO3-) from grazing land is a major cause for surface and ground water contamination. These losses can further increase when other N sources ...
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A MECHANISM FOR ASH ASSISTED SLUDGE DEWATERING |
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The ability of various additives to improve the dewaterability of activated sludge was determined and the surface properties of additives characterized in order to arrive at a mech...
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A MODEL FOR THE DISTRIBUTION OF BACTERIA IN THE SEAGRASS RHIZOSPHERE REDOX GRADIENT |
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Abstract and Oral presentation for the meeting of Wetland and Estuary Scientists from the US Gulf Coast and S.E. Atlantic.
A conceptual model of seagrass bed sediments accou...
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A MODIFIED LIGHT TRANSMISSION VISUALIZATION METHOD FOR DNAPL SATURATION MEASUREMENTS IN 2-D MODELS |
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In this research, a light transmission visualization (LTV) method was used to quantify dense non-aqueous phase liquids (DNAPL) saturation in two-dimensional (2-D), two fluid phase ...
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A MODIFIED LIGHT TRANSMISSION VISUALIZATION METHOD FOR DNAPL SATURATION MEASUREMENTS IN 2-D MODELS |
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In this research, a light transmission visualization (LTV) method was used to quantify dense non-aqueous phase liquids (DNAPL) saturation in two-dimensional (2-D), two fluid phase ...
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A MULTINUCLEAR NMR SPIN LABELING INVESTIGATION OF THE SOLUTION STRUCTURE OF THE BASE STACKED MN(+2) -AMP COMPLEX |
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(15)N, (13)C, and (31)P electron-nuclear relaxation times are used to determine the solution structure of the base stacked Mn(+2) -AMP complex. The nitrogen-Mn(+2) distances that a...
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A NEW CARBON-BOND MECHANISM FOR AIR QUALITY SIMULATION MODELING |
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A new generalized kinetic mechanism for photochemical smog, which incorporates recent information on the atmospheric reactions of aromatic hydrocarbons, has been developed. The mec...
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A NOVEL TECHNIQUE FOR QUANTITATIVE ESTIMATION OF UPTAKE OF DIESEL EXHAUST PARTICLES BY LUNG CELLS |
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While airborne particulates like diesel exhaust particulates (DEP) exert significant toxicological effects on lungs, quantitative estimation of accumulation of DEP inside lung cell...
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A PERFORMANCE EVALUATION OF THE 2004 RELEASE OF MODELS-3 CMAQ |
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This performance evaluation compares a full annual simulation (2001) of CMAQ (Version4.4) covering the contiguous United States against monitoring data from four nationwide network...
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A PHARMACOKINETIC MODEL FOR ESTIMATING EXPOSURE OF AMERICANS TO DIOXIN-LIKE COMPOUNDS IN THE PAST, PRESENT, AND FUTURE |
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Empirical evidence suggests that exposure of Americans to dioxin-like compounds was low during the early decades of the 20th century, then increased during the 1940s and 1950s reac...
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A PRELIMINARY FEASIBILITY STUDY FOR AN OFFSHORE HAZARDOUS WASTE INCINERATION FACILITY |
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The report summarizes a feasibility study of using an existing offshore oil platform, being offered to the Government, as a site for incineration of hazardous wastes and related re...
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A PROTOTYPE MOBILE SYSTEM FOR PYROLYSIS OF AGRICULTURAL AND/OR SILVICULTURAL WASTES |
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This research program was initiated to investigate three elements of a prototype mobile system for pyrolysis of agricultural and/or silvicultural wastes into clean, transportable f...
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A REVIEW OF ASSESSMENTS CONDUCTED ON BIO-ETHANOL AS A TRANSPORTATION FUEL FROM A NET ENERGY, GREENHOUSE GAS, AND ENVIRONMENTAL LIFE CYCLE PERSPECTIVE |
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Interest in producing ethanol from bio-mass in an attempt to make transportation ecologically sustainable continues to grow. In recent years, a large number of assessments have bee...
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A SECOND-BEST EVALUATION OF EIGHT POLICY INSTRUMENTS TO REDUCE CARBON EMISSIONS. (R825313) |
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AbstractThis paper uses a numerical general equilibrium model to compare the costs of alternative policies for reducing carbon emissions in a second-best setting with a...
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A SOIL SPATIAL DATA FRAMEWORK FOR ENVIRONMENTAL MODELING IN THE CONTIGUOUS US |
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A suite of soil and related data-layers have been developed for environmental assessments of the effects of tropospheric ozone exposure and nitrogen deposition on forests, and gl...
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A SPATIALLY-EXPLICIT WATERSHED MODEL FOR REGIONAL ANALYSIS OF DISSOLVED ORGANIC CARBON IN LAKES. (R826762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A STABLE ISOTOPE ANALYSIS OF SOIL CARBON DENSITY FRACTIONS FOLLOWING 4 YEARS OF CONTINUOUS CLIMATE CHANGE EXPOSURE IN A DOUGLAS FIR MESOCOSM STUDY |
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We conducted a 4-year full-factorial study of the effects of elevated atmospheric CO2 and temperature on Douglas fir seedlings growing in reconstructed native forest soils in mesoc...
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A STABLE ISOTOPE MODEL APPROACH TO ESTIMATING THE CONTRIBUTION OF ORGANIC MATTER FROM MARSHES TO ESTUARIES |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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A STRINGENT COMPARISON OF SAMPLING AND ANALYSIS METHODS FOR VOCS IN AMBIENT AIR |
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A carefully designed study was conducted during the summer of 1998 to simultaneously collect samples of ambient air by canisters and compare the analysis results to direct sorben...
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A STUDY OF WINTER AIR POLLUTANTS AT FAIRBANKS, ALASKA |
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An air pollution monitoring program was initiated by the Arctic Environmental Research Station (AERS). Ambient monitoring was done throughout the winters of 76-77 and 77-78 at the ...
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A STUDY TO EVALUATE CARBON MONOXIDE AND HYDROGEN SULFIDE CONTINUOUS EMISSION MONITORS AT AN OIL REFINERY |
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An eleven month field evaluation was done on five hydrogen sulfide and four carbon monoxide monitors located at an oil refinery. The hydrogen sulfide monitors sampled a fuel gas fe...
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A STUDY TO IMPROVE EPA METHODS 15 AND 16 FOR REDUCED SULFUR COMPOUNDS |
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EPA source test methods for reduced sulfur compounds, Method 15 for Claus sulfur recovery plants and Method 16 for Kraft pulp mills have been evaluated, and information is provided...
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A SUMMARY OF NHEERL ECOLOGICAL RESEARCH ON GLOBAL CLIMATE CHANGE |
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The purpose of this document is to review ecological research conducted by scientists at the National Health and Environmental Research Laboratory (NHEERL) under the Environmental ...
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A SURVEY ON RESEARCH NEEDS ON PERSONAL SAMPLERS FOR TOXIC ORGANIC COMPOUNDS |
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A survey is presented on the research and development needs for personal monitoring devices for toxic organic compounds in the ambient atmosphere. This survey includes a descriptio...
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A TIME SERIES ANALYSIS OF AIR POLLUTION AND PRETERM BIRTH IN PENNSYLVANIA, 1997-2001 |
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Introduction: Small increases in risk for preterm delivery in relation to air pollution have been reported, but prior investigations may have inadequately controlled for individual...
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A WHOLE-LAKE WATER QUALITY SURVEY OF LAKE OAHE BASED ON A SPATIALLY-BALANCED PROBABILISTIC DESIGN |
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Assessing conditions on large bodies of water presets multiple statistical and logistical challenges. As part of the Upper Missouri River Program of the Environmental Monitoring an...
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ABIOTIC DEGRADATION OF TRICHLOROETHYLENE UNDER THERMAL REMEDIATION CONDITIONS |
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The degradation of TCE (C2HCl3) to carbon dioxide (CO2) and chloride (Cl-) has been reported to occur during thermal remediation of subs...
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ABIOTIC REDUCTIVE DECHLORINATION OF CARBON TETRACHLORIDE AND HEXACHLOROETHANE BY ENVIRONMENTAL REDUCTANTS |
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The transformation rates of hexachloroethane (HCA) and carbon tetrachloride (CTET) have been measured in model systems representing the ground water environment and in slurries of ...
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ABIOTIC TRANSFORMATION OF CARBON TETRACHLORIDE AT MINERAL SURFACES |
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Transformation of carbon tetrachloride (CCl4) by biotite, vermiculite, and pyrite in the presence of hydrogen sulfide (HS-) was studied under different environmental conditions. n ...
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ABIOTIC TRANSFORMATION OF CARBON TETRACHLORIDE IN THE PRESENCE OF SULFIDE AND MINERAL SURFACES |
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Abiotic transformations, such as reductive dehalogenation and nucleophilic substitution, can influence the fate of halogenated aliphatic compounds in aqueous environments. Sulfide,...
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ABIOTIC TRANSFORMATIONS OF TOXIC ORGANIC CHEMICALS IN THE LIQUID PHASE AND SEDIMENTS |
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Analyses of selected groundwater databases provide insight into the abiotic reaction conditions that occur in subsurface ecosystems. With this information it is possible to impose ...
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ABOVEGROUND BIOMASS DISTRIBUTION OF US EASTERN HARDWOOD FORESTS AND THE USE OF LARGE TREES AS AN INDICATOR OF FOREST DEVELOPMENT |
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Past clearing and harvesting of the deciduous hardwood forests of eastern USA released large amount of carbon dioxide into the atmosphere, but through recovery and regrowth these f...
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ABSORPTION OF CO2 AND SUBSEQUENT VISCOSITY REDUCTION OF AN ACRYLONITRILE COPOLYMER. (R829555) |
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Acrylonitrile (AN) copolymers (AN content greater than about 85 mol%) are traditionally solution processed to avoid a cyclization and crosslinking reaction that takes place...
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ABSORPTION OF CO2 IN HIGH ACRYLONITRILE CONTENT COPOLYMERS: DEPENDENCE ON ACRYLONITRILE CONTENT. (R829555) |
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In continuation of our goal to determine the ability of CO2 to plasticize acrylonitrile (AN) copolymers and facilitate melt processing at temperatures below the onset...
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ABSORPTION/OXIDATION OF MTBE AND CARBON REGENERATION VIA FENTON REACTION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ACCOUNTING FOR BIOLOGICAL AND ANTHROPOGENIC FACTORS IN NATIONAL LAND-BASE CARBON BUDGETS |
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NO ABSTRACT PROVIDED...
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ACCOUNTING FOR BIOLOGICAL AND ANTHROPOGENIC FACTORS IN NATIONAL LAND-BASED CARBON BUDGETS |
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Efforts to quantify net greenhouse gas emissions at the national scale, as required by the United Nations Framework Convention on Climate Change, must include both industrial emiss...
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ACCUMULATION FACTORS FOR ELEVEN POLYCHLORINATED BIPHENYL CONGENERS |
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According to the fugacity approach (Mackay 1979), pollutant uptake by an organism is determined by the chemical fugacity differential between the organism and its environment. he A...
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ACETANILIDE HERBICIDE DEGRADATION PRODUCTS BY LC/MS |
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Acetanilide herbicides are frequently applied in the U.S. on crops (corn, soybeans, popcorn, etc.) to control broadleaf and annual weeds. The acetanilide and acetamide herbicide...
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ACETOGENIC BACTERIA ASSOCIATED WITH SEAGRASS ROOTS |
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Seagrasses are adapted to being rooted in reduced, anoxic sediments with high rates of sulfate reduction. During the day, an oxygen gradient is generated around the roots, becoming...
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ACID FUNCTIONALIZED SINGLE-WALLED CARBON NANOTUBES ENHANCE CARDIAC ISCHEMIC/REPERFUSIOIN INJURY |
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Engineered carbon nanotubes are being intensively developed for wide applications. Because of their unique light properties, nanotubes can impose some potentially toxic effects, p...
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ACID-BASE CHARACTERISTICS OF ORGANIC CARBON IN THE HUMEX LAKE SKJERVATJERN |
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Over the past two decades, acidification has been one of the central issues in environmental research. his subproject of the Lake Acidification Experiment (HUMEX) in 1988, was desi...
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ACID-FUNCTIONALIZED SINGLE-WALLED CARBON NANOTUBES ENHANCE CARDIAC ISCHEMIC/REPERFUSION INJURY |
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Engineered nanotubes are being intensively developed for biomedical applications such as gene and drug delivery. Because of their unique properties, nanotubes can impose some pote...
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ACIDIFICATION TRENDS AND THE EVOLUTION OF NEUTRALIZATION MECHANISMS THROUGH TIME AT THE BEAR BROOK WATERSHED IN MAINE (BBWM), U.S.A. |
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The paired catchment study at the forested Bear Brook Watershed in Maine (BBWM) U.S.A. documents interactions among short- to long-term processes of acidification. In 1987-1989, ru...
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ACQUISITION AND ANALYSIS OF GROUNDWATER/AQUIFER SAMPLES: CURRENT TECHNOLOGY AND THE TRADE OFF BETWEEN QUALITY ASSURANCE AND PRACTICAL CONSIDERATIONS |
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In the migration of a high-organic-carbon-content landfill leachate through the subsurface environment, the mobility of inorganic contaminants can be seriously influenced by oxidat...
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ACRYLONITRILE PLANT AIR POLLUTION CONTROL |
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Based on available literature, the report identifies and ranks (in terms of efficiency, cost, and energy requirements) air pollution control technologies for each of four major air...
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ACTION OF A FLUORANTHENE-UTILIZING BACTERIAL COMMUNITY OF POLYCYLIC AROMATIC HYDROCARBON COMPONENTS OF CREOSOTE |
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Cultures enriched by serial transfer through a mineral salts medium containing fluoranthene were used to establish a stable, 7-membered bacterial community from a sandy soil highly...
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ACTIONS OF A VERSATILE FLUORENE-DEGRADING BACTERIAL ISOLATE ON POLYCYCLIC AROMATIC COMPOUNDS |
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Pseudomonas cepacia F297 showed ability to grow with fluorene as a sole source of carbon and energy -- its growth yield corresponding to assimilation of about 40% of fluorene carbo...
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ACTIVATED CARBON ADSORPTION OF TRACE ORGANIC COMPOUNDS |
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Research was conducted to determine how effectively humic substances and the trace contaminants 2-methylisoborneol (MIB), geosmin, the chlorophenols and polynuclear aromatic hydroc...
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ACTIVATED CARBON AND MEMBRANE PROCESSES FOR DISINFECTION BY-PRODUCT (DBP) AND MICROBIAL CONTROL |
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It is likely that many utilities will be able to meet current and upcoming drinking water regulations for DBPs by implementing one of the following relatively low-cost options: cha...
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ACTIVATED CARBON PROCESS FOR THE TREATMENT OF CADMIUM(II)-CONTAINING WASTEWATERS |
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The removal of cadmium(II) from two synthetic cadmium plating wastewaters by an activated carbon adsorption process has been investigated. Among the 17 different types of activated...
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ACTIVATED CARBON PROCESS FOR TREATMENT OF WASTEWATERS CONTAINING HEXAVALENT CHROMIUM |
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The removal of hexavalent chromium, Cr(VI), from dilute aqueous solution by an activated carbon process has been investigated. Two removal mechanisms were observed; hexavalent chro...
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ACTIVATED CARBON TREATMENT OF INDUSTRIAL WASTEWATERS: SELECTED TECHNICAL PAPERS |
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Because of the tremendous interest in the organic constituent removal by activated carbon, the two industrial categories displaying the most interest are the petroleum refining and...
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ACTIVATED CARBON TREATMENT OF KRAFT BLEACHING EFFLUENTS |
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The removal of color and organic contaminants by adsorption on activated carbon from the effluent of a kraft pulp bleaching plant was investigated in a pilot plant. The caustic ble...
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ACTIVATED SLUDGE WITH POWDERED ACTIVATED CARBON TREATMENT OF A DYES AND PIGMENTS PROCESSING WASTEWATER |
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This paper discusses completed efforts in the treatment of dyes and pigments processing wastewater utilizing the activated sludge process (ASP) enhanced with powdered activated car...
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ACUTE AND CHRONIC TOXICITY TO THE FATHEAD MINNOW, 'PIMEPHALES PROMELAS', OF EFFLUENTS FROM A TREATMENT PLANT RECEIVING DYES AND PIGMENTS PROCESSING WASTEWATER |
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Ninety-six hour, static acute, and continuous-flow early life-stage (ELS) chronic toxicity tests, using the fathead minnow (Pimephales promelas), were conducted to evaluate the tox...
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ACUTE BEHAVORIAL EFFECTS FROM EXPOSURE TO TWO-STROKE ENGINE EXHAUST |
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Benefits of changing from two-stroke to four-stroke engines (and other remedial requirements) can be evaluated (monetized) from the standpoint of acute behavioral effects of human ...
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ACUTE ELEVATION OF BLOOD CARBOXYHEMOGLOBIN TO 6% IMPAIRS EXERCISE PERFORMANCE AND AGGRAVATES SYMPTOMS IN PATIENTS WITH ISCHEMIC HEART DISEASE (JOURNAL VERSION) |
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Acute exposure to carbon monoxide has the potential to impair exercise capacity in patients with ischemic heart disease. We studied the effect of inhalation of this compound suffic...
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ACUTE, 14-DAY REPEATED DOSING, AND 90-DAY SUBCHRONIC TOXICITY STUDIES OF CARBON TETRACHLORIDE IN CD-1 MICE (JOURNAL VERSION) |
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CD-1 mice were utilized in 14-day repeated dosing and 90-day subchronic toxicity studies of carbon tetrachloride employing oral gavage with a corn-oil vehicle. The 14-day study use...
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ADSORPTION OF CADMIUM ON BIOSOLIDS-AMENDED SOILS |
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A considerable controversy exists over the biosolid phase (organic or inorganic) responsible for the reduction in phytoavailable Cd in soils amended with biosolids as compared to s...
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ADSORPTION OF CADMIUM ONTO DIFFERENT FRACTIONS OF BIOSOLID-AMENDED SOILS |
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We hypothesized not only organic but also inorganic fraction in biosolids controls the metal availability in soil systems. To test this hypothesis we conducted Cd adsorption experi...
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ADSORPTION OF POLYCYCLIC AROMATIC HYDROCARBONS IN AGED HARBOR SEDIMENTS |
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Polycyclic aromatic hydrocarbons (PAHs) are a group of hydrophobic organic contaminants which have low aqueous solubilities and are common pollutants in harbor sediments. Adsorptio...
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ADSORPTION OF S-TRIAZINES AND THEIR METABOLITES ON ACTIVATED CARBON. (R826253) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ADSORPTION OF SURFACTANTS |
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Adsorption of surfactants on particles affects their distribution, fate, and effects in natural waters. xperiments were conducted to study the properties of surfactant (charge and ...
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ADVANCED COMPOSITES TECHNOLOGY CASE STUDY AT NASA LANGLEY RESEARCH CENTER |
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Under the Chesapeake Bay Agreement, NASA-LaRC is a member of the Tidewater Interagency Pollution Prevention Program (TIPPP). t NASA-LaRC, a technique for producing advanced composi...
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ADVANCED OXIDATION PROCESSES (AOPS) FOR DESTRUCTION OF METHYL TERTIARY BUTYL ETHER (MTBE -AN UNREGULATED CONTAMINANT) IN DRINKING WATER |
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Advanced oxidation processes (AOPs) provide a promising treatment option for the destruction of MTBE directly in surface and ground waters. An ongoing study is evaluating the abili...
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ADVANCED OXIDATION PROCESSES - TEST OF A KINETIC MODEL FOR THE OXIDATION OF ORGANIC COMPOUNDS WITH OZONE AND HYDROGEN IN A SEMIBATCH REACTOR |
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Experimental data are presented to test a kinetic model of the O3/H2O2 process in a semibatch reactor. he effect of bicarbonate and carbonate ions is measured and found to be in co...
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ADVANCED OXIDATION PROCESSES IN THE TREATMENT OF CONTAMINANT CANDIDATE LIST (CCL) COMPOUNDS |
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The current (2nd) Contaminant Candidate List was completed in 2005 by the United States EPA as an update to the Safe Drinking Water Act. The list of 42 chemical contaminants spans ...
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ADVANCED TREATMENT FOR WASTEWATER RECLAMATION AT WATER FACTORY 21 |
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The performance and reliability of Water Factory 21 (WF21) in Orange County, California, for removal of a broad range of organic, inorganic, and biological contaminants from activa...
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ADVANCED WASTE TREATMENT FOR HOUSING AND COMMUNITY DEVELOPMENTS |
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Treatment of wastewater from a subdivision in a physical-chemical treatment plant (screening, chemical coagulation, sedimentation, filtration, carbon adsorption, chlorination) was ...
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ADVANCES IN ENCAPSULATION TECHNOLOGIES FOR THE MANAGEMENT OF MERCURY CONTAMINATED HAZARDOUS WASTES |
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Although industrial and commercial uses of mercury have been curtailed in recent times, there is a demonstrated need for the development of reliable hazardous waste management tech...
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ADVANCES IN THE MEASUREMENT OF AMBIENT CARBON FIBERS |
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Methodologies that have been used in a number of passive collectors and active detectors for measuring ambient carbon fibers are summarized. The need for improved performance in te...
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ADVANCING FINE ROOT RESEARCH WITH MINIRHIZOTRONS |
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Minirhizotrons provide a nondestructive, in situ method for directly viewing and studying fine roots. Although many insights into fine roots have been gained using minirhizotrons, ...
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AEROBIC DENITRIFICATION AT LOW NO3 AND ORGANIC CARBON CONCENTRATIONS |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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AFFINITY EXTRACTION INTO CARBON DIOXIDE. (R824730) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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AGRICULTURAL CONTAMINANTS REMOVAL FROM GROUNDWATER BY CARBON AND REVERSE OSMOSIS |
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The groundwater of Suffolk County, New York, is designated as a sole source aquifer and in recent years there have been increasing concerns about the contamination of this water by...
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AGRICULTURAL PESTICIDE EMISSIONS ASSOCIATED WITH COMMON CROPS IN THE UNITED STATES |
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Annual emissions for the year 1987 from the application of agricultural pesticides have been estimated by crop type by county for the United States using a geographic information s...
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AGRICULTURAL SOURCES AND SINKS OF CARBON |
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Most existing agricultural lands have been in production for sufficiently long periods that C inputs and outputs are nearly balanced and they are neither a major source nor sink of...
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AGRICULTURE IN THE GREAT PLAINS: NET CARBON CONSEQUENCES OF DRYLAND AND IRRIGATED CULTIVATION. (R824993) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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AGROFORESTRY SYSTEMS: INTEGRATED LAND USE TO STORE AND CONSERVE CARBON |
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Agroforestry is a promising land use practice to maintain or increase agricultural productivity while preserving or improving fertility. n extensive literature survey was conducted...
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AIR CLEANERS FOR INDOOR AIR POLLUTION CONTROL (CHAPTER 10) |
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The chapter describes an experimental study to evaluate performance characteristics of currently available controls for indoor air pollutants, including both particles and gases. h...
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AIR CONTAMINANT EXPOSURE DURING THE OPERATION OF LAWN AND GARDEN EQUIPMENT |
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The U.S. Environmental Protection Agency (EPA) initiated the Small Engine Exposure Study (SEES) to evaluate potential exposures among users of small, gasoline-powered, non-road spa...
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AIR EMISSIONS FROM LASER DRILLING OF PRINTED WIRING BOARD MATERIALS |
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The paper gives results of a study to characterize gases generated during laser drilling of printed wiring board (PWB) material and identifies the pollutants and generation rates f...
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AIR INFILTRATION MEASUREMENTS USING TRACER GASES: A LITERATURE REVIEW |
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The report gives results of a literature review of air filtration measurements using tracer gases, including sulfur hexafluoride, hydrogen, carbon monoxide, carbon dioxide, nitrous...
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AIR POLLUTION AND HEALTH IN WASHINGTON, D.C.: SOME ACUTE HEALTH EFFECTS OF AIR POLLUTION IN THE WASHINGTON METROPOLITAN AREA |
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The study has attempted to assess some of the acute health effects of air pollution. Specifically, the investigation has tested the hypothesis that air pollution can aggravate the ...
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AIR POLLUTION AND RISK FOR PRETERM BIRTH IN PENNSYLVANIA, 1997-2001: A TIME SERIES APPROACH |
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Preterm delivery can lead to serious infant health outcomes including death and life-long disability. Small increases in preterm delivery risk in relation to air pollution have bee...
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AIR POLLUTION CONCENTRATIONS ASSOCIATED WITH STAGNATION AND RESTRICTED VISIBILITY, EASTERN NORTH AMERICA, AUGUST 1976 |
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August 16 to 22, 1976, was designated as a stagnation period for a large part of the eastern United States by the Korshover technique, and Lyons and his associates judged August 16...
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AIR POLLUTION CONTROL ALTERNATIVES FOR SHALE OIL PRODUCTION OPERATIONS |
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The report consolidates, evaluates, and presents available air pollution emission data and air pollution control technology relevant to oil shale production, for use by project dev...
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AIR POLLUTION CONTROL TECHNOLOGIES |
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This is a chapter for John Wiley & Son's Mechanical Engineers' Handbook, and covers issues involving air pollution control. Various technologies for controlling sulfur oxides is co...
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AIR POLLUTION: GROUND-BASED SENSING OF SOURCE EMISSIONS |
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Some types of gaseous pollution sources, particularly extended area industrial complexes and those producing hot combustion products, cannot be monitored adequately with convention...
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AIR QUALITY |
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EPA has set National Ambient Air Quality Standards (NAAQS) for six principal pollutants, which include: - ozone,
- particulate matter,
- carbon monoxide,
...
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AIR QUALITY AND SELECTED BIRTH DEFECTS, SEVEN COUNTY STUDY, TEXAS, 1997-2000 |
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Introduction: A number of epidemiologic investigations have shown adverse effects of ambient air pollution on reproductive outcomes including spontaneous abortion, fetal growth, pr...
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AIR QUALITY CRITERIA CARBON MONOXIDE, EXTERNAL REVIEW DRAFT |
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The U.S. Environmental Protection Agency (EPA) promulgates the National Ambient Air Quality Standards (NAAQS) on the basis of scientific information contained in criteria documents...
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AIR QUALITY CRITERIA FOR CARBON MONOXIDE (2000) Final Report |
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The U.S. Environmental Protection Agency (EPA) promulgates the National Ambient Air Quality Standards (NAAQS) on the basis of scientific information contained in criteria documents...
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AIR QUALITY CRITERIA FOR CARBON MONOXIDE (SECOND EXTERNAL REVIEW DRAFT) |
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This revised criteria document consolidates and updates the current scientific basis for another reevaluation of the National Ambient Air Quality Standards for carbon monoxide (CO)...
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AIR QUALITY CRITERIA FOR OXIDES OF NITROGEN (1982) |
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This document is an evaluation and assessment of scientific information relative to determining the health and welfare effects associated with exposure to various concentrations of...
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AIRBORNE MERCURY DEPOSITION AND WATERSHED CHARACTERISTICS IN RELATION TO MERCURY CONCENTRATIONS IN WATER, SEDIMENTS, PLANKTON, AND FISH OF EIGHTY NORTHERN MINNESOTA LAKES |
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In light of increasing fish consumption advisories in several states, a comprehensive multimedia database was created to answer a variety of questions. Mercury concentrations in pr...
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AIRWAY AND CARDIOVASCULAR EFFECTS OF INHALED ULTRAFINE CARBON PARTICLES IN RESTING, HEALTHY, NONSMOKING ADULTS. (R826781) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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AIRWAY AND CARDIOVASCULAR EFFECTS OF INHALED ULTRAFINE CARBON PARTICLES IN RESTING, HEALTHY, NONSMOKING ADULTS. (R827354C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ALCOHOL OXIDATION - A COMPARATIVE STUDY OF DIFFERENT CATALYTIC PROCESSES |
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Oxidation of alcohols to aldehydes, ketones or carboxylic acids is one of the most desirable chemical transformations in organic synthesis as these products are important precursor...
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ALLOCATION OF CARBON IN MYCORRHIZAL PINUS PONDEROSA SEEDLINGS EXPOSED TO OZONE |
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NO ABSTRACT PROVIDED...
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ALTERATIONS IN RAT FLASH AND PATTERN REVERSAL EVOKED POTENTIALS AFTER ACUTE OR REPEATED ADMINISTRATION OF CARBON DISULFIDE (CS2) |
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Because solvents may selectively alter portions of visual evoked potentials, we examined the effects of carbon disulfide (CS2) on flash (FEPs) and pattern reversal (PREPs) evoked p...
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ALTERNATIVE DISINFECTANTS AND GRANULAR ACTIVATED CARBON EFFECTS ON TRACE ORGANIC CONTAMINANTS |
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The effects of alternative disinfectants on drinking water quality were examined along with the ability of granular activated carbon (GAC) to remove disinfection by-products and or...
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ALTERNATIVE DISINFECTANTS FOR DRINKING WATER TREATMENT |
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During a one-year study at Jefferson Parish, Louisiana the chemical, microbiological, and mutagenic effects of using the major drinking water disinfectants (chlorine, chlorine diox...
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ALTITUDE AS A FACTOR IN AIR POLLUTION |
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Air pollution is affected by change in altitude. Cities with surface elevations above 1500 meters have atmospheric pressures which are approximately fifteen percent (15%) below pre...
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AMBIENT AIR AUDITS OF THE NATIONAL CROP LOSS ASSESSMENT NETWORK (1981-1986) |
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Since 1981 the Environmental Monitoring Systems Laboratory (EMSL) of the Environmental Protection Agency (EPA) at Research Triangle Park, North Carolina has been conducting perform...
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AMBIENT AIR CARBON MONOXIDE MEASUREMENTS |
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A new type CO monitor was applied to special ambient air measurement problems. The monitor, a gas filter correlation (GFC) instrument, was designed specifically for use in the St. ...
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AMBIENT AIR HYDROXYL RADICAL CONCENTRATIONS: MEASUREMENTS AND MODEL PREDICTIONS |
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This review critically examines the limited number of recent near surface measurements of hydroxyl radicals in urban and rural areas. redictions of average tropospheric, hemispheri...
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AMBIENT AIR NON-METHANE HYDROCARBON MONITOR |
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A monitor has been developed with adequate sensitivity and accuracy to measure continuously the concentration of non-methane hydrocarbons (NMHC) in ambient air. The monitor consist...
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AMBIENT AIR QUALITY AND SELECTED BIRTH DEFECTS, SEVEN COUNTY STUDY, TEXAS, 1997-2000 |
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Background: A number of epidemiologic investigations have shown adverse effects of ambient air pollution on reproductive outcomes. A recent case-control study found associations be...
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AMBIENT CARBON MONOXIDE MONITOR |
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A portable instrument has been designed and two units have been built to monitor the concentration of CO in ambient air. The air flows through a sampling section that is approximat...
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AMBIENT HYDROCARBON AND OZONE CONCENTRATIONS NEAR A REFINERY |
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An ambient air monitoring study to characterize airborne emissions from petroleum refineries was conducted near the Marathon oil refinery at Robinson, Illinois during June 17 - Jul...
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AMBIENT HYDROCARBON AND OZONE CONCENTRATIONS NEAR A REFINERY, BENICIA, CALIFORNIA, 1975 |
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As part of an effort to characterize airborne emissions from petroleum refineries, an ambient air monitoring study was conducted near the Exxon refinery at Benicia, California, dur...
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AMBIENT LEVEL VOLATILE ORGANIC COMPOUND (VOC) MONITORING USING SOLID ADSORBANTS - RECENT U.S. EPA STUDIES |
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Ambient air spiked with 1-10 ppbv concentrations of 41 toxic volatile organic compounds (VOCs) listed in U.S. Environmental Protection Agency (EPA) Compendium Method TO-14A was m...
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AMBIENT PARTICULATE MATTER DECREASED IN HUMAN ALVEOLAR MACHROPHAGE CYTOKINE RELEASE |
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Human exposure to ambient airborne particulate matter (PM) is associated with cardiopulmonary mortality and morbidity, including increased hospitalizations for lung infection. Nor...
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AMBIENT POLLUTANT CONCENTRATIONS MEASURED BY A MOBILE LABORATORY IN SOUTH BRONX, NY (R827351) |
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The objective of this study is to characterize the ambient air quality of the South Bronx, New York City (NYC), having high concentrations of diesel trucks and waste transfer fa...
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AMBIENT TEMPERATURE AND DRIVING CYCLE EFFECTS FROM AN AUTOMOBILE POWERED BY LIQUIFIED PETROLEUM GAS |
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This paper describes an emissions study of a 1991 Chevrolet Lumina, powered by liquefied petroleum gas. he study was designed to obtain emissions information to predict how liquid ...
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AMINO ACID COMPOSITION OF SUSPENDED PARTICLES, SEDIMENT-TRAP MATERIAL, AND BENTHIC SEDIMENT IN THE POTOMAC ESTUARY |
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Sediment trap deployments in estuaries provide a method for estimating the amount of organic material transported to the sediments from the euphotic zone. he amino acid composition...
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AMPEROMETRIC THICK-FILM STRIP ELECTRODES FOR MONITORING ORGANOPHOSPHATE NERVE AGENTS BASED ON IMMOBILIZED ORGANOPHOSPHORUS HYDROLASE. (R823663) |
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An amperometric biosensor based on the immobilization of organophosphorus hydrolase
(OPH) onto screen-printed carbon electrodes is shown useful for the rapid, sensitive, and low...
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AMPHIPOD COMMUNITY RESPONSE TO STRESS INDUCED BY ALGAL MATS IN A PACIFIC NORTHWEST ESTUARY |
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Amphipod, algal and sediment samples were taken at two- to four-week intervals from June through December, 2000 along two transects in Yaquina Bay, OR. The transects extended from...
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AN ANNUAL EVALUATION OF THE 2005 RELEASE OF MODELS-3 CMAQ |
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An annual operation performance evaluation of the 2005 release of Models-3 CMAQ v4.5 has been performed. The poster presented results from the winter and summer season for sulfate...
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AN APPROACH TO ASSESSMENT OF MANAGEMENT IMPACTS ON AGRICULTURAL SOIL CARBON |
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Agroecosystems contain about 12% of the terrestrial soil carbon and play an important role in the global carbon cycle. e describe a project to evaluate the degree to which manageme...
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AN ASSESSMENT OF MERCURY-SPECIES-DEPENDENT BINDING WITH NATURAL ORGANIC CARBON |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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AN ASSESSMENT OF OZONE AND CHLORINE DIOXIDE TECHNOLOGIES FOR TREATMENT OF MUNICIPAL WATER SUPPLIES |
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This executive summary covers in abbreviated form each of the principal topics of the full report. Emphasis in the summary, and in the full report, is given to the fundamental uses...
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AN ASSESSMENT OF PHTHALATE ESTER TOXICITY TO FRESHWATER BENTHOS: 2. SEDIMENT EXPOSURES |
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Seven phthalate esters were evaluated for their stability and 10-d acute toxicity to the freshwater invertebrates Hyalella azteca and Chironomus tentans following incorporation int...
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AN ASSESSMENT OF THE ECOLOGICAL CONDITION OF PENSACOLA BAY, FLORIDA |
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Assessment of the Ecological Condition of Pensacola Bay, Florida (Abstract). To be presented at the16th Biennial Conference of the Estuarine Research Foundation, ERF 2001: An Estu...
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AN AUTOMATED MONITORING SYSTEM FOR FISH PHYSIOLOGY AND TOXICOLOGY |
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This report describes a data acquisition and control (DAC) system that was constructed to manage selected physiological measurements and sample control for aquatic physiology and t...
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AN AUTOMATED MULTISAMPLE-STREAM CHEMICAL MONITORING SYSTEM |
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An automated system has been designed and operated successfully for the past two years for chemical analysis of nitrogen, phosphorus, and carbon compounds in the study of the fate ...
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AN ECOSYSTEM MODEL OF A RIVER-DOMINATED PACIFIC NORTHWEST ESTUARY: ROLES OF SALT MARSH-, RIVER- AND OCEAN-DERIVED MATERIALS |
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The Salmon River estuary on the central Oregon coast is river-dominated, with hydraulic residence times ranging from <1 day during winter high flows to a week during low flows. Th...
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AN ENRICHMENT CULTURE THAT DEGRADES MTBE UNDER ANAEROBIC CONDITIONS |
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Biodegradation of MTBE in ground water may be a significant factor helping to reduce MTBE contamination from gasoline spills. Previously, decreases in MTBE concentrations in wells...
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AN ENVIRONMENTAL AND ECONOMIC COMPARISON OF ION EXCHANGE AND RECENTLY COMMERCIALIZED ELECTROCHEMICAL TECHNOLOGIES FOR THE RECOVERY OF RINSE WATER IN BRIGHT NICKEL PLATING FACILITY |
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Researchers at USEPA are testing and evaluating two commercial electrochemical technologies for the purification of rinse water and the recovery of copper and nickel from a variety...
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AN ENVIRONMENTAL TECHNOLOGY VERIFICATION (ETV) PERFORMANCE TESTING OF THREE RAPID PCR TECHNOLOGIES FOR IDAHO TECHNOLOGY R.A.I.D.® SYSTEM, APPLIED BIOSYSTEMS TAQMAN® E. COLI 0157:H7 DETECTION SYSTEM, AND INVITROGEN CORPORATION PATHALERTTM DETECTION KITS |
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The Environmental Technology Verification (ETV) Program, beginning as an initiative of the U.S. Environmental Protection Agency (EPA) in 1995, verifies the performance of commercia...
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AN EVALUATION OF STREAM RESTORATION EFFECTIVENESS IN AN URBAN WATERSHED |
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The USEPA ORD Ground Water and Ecosystems Restoration Division has been conducting a before and after stream restoration evaluation of Mine Bank Run, a highly degraded stream in an...
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AN EXPERIMENTAL ASSESSMENT OF THE IMPACTS OF PARTIAL DNAPL SOURCE ZONE DELETION USING SPARGING AS A REMEDIATION TECHNIQUE |
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The contamination of the subsurface environment by dense non-aqueous phase liquids (DNAPL) is a wide-spread problem that poses a significant threat to soil and groundwater quality....
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AN IMPROVED MODEL FOR ESTIMATING EMISSIONS OF VOLATILE ORGANICCOMPOUNDS FROM FORESTS IN THE EASTERN UNITED STATES |
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Regional estimates of biogenic volatile organic compound (BVOC) emissions are important inputs for models of atmospheric chemistry and carbon budgets. ince forests are the primary ...
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AN INVESTIGATION OF THE CHEMICAL STABILITY OF ARSENOSUGARS IN BASIC ENVIRONMENTS USING IC-ICP-MS AND IC-ESI-MS/MS |
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This paper evaluates the chemical stability of four arsenosugars using tetramethylammonium hydroxide (TMAOH) as an extraction solvent. This solvent was chosen because of the near ...
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AN INVESTIGATION OF THE CHEMICAL STABILITY OF ARSENOSUGARS IN SIMULATED GASTRIC JUICE AND ACIDIC ENVIRONMENTS USING IC-ICP-MS AND IC-ESI-MS/MS |
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A more quantitative extraction of arsenic-containing compounds from seafood matrices is essential in developing better dietary exposure estimates. More quantitative extraction oft...
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AN OVERVIEW OF THE DEVELOPMENT, STATUS, AND APPLICATION OF EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS FOR PAH MIXTURES |
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This article provides an overview of the development, theoretical basis, regulatory status, and application of the U.S. Environmental Protection Agency's (USEPA's)< Equilibrium Par...
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ANAEROBIC AND AEROBIC TREATMENT OF CHLORINATED ALIPHATIC COMPOUNDS |
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Biological degradation of a mixture of 12 chlorinated aliphatic compounds (CACs) was assessed in continuously fed reactors and in more controlled batch-fed serum bottle tests. he r...
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ANAEROBIC DEGRADATION OF MTBE TO TBA IN GROUND WATER AT GASOLINE SPILL SITES IN ORANGE COUNTY, CALIFORNIA |
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Although tert-Butyl Alcohol (TBA) has not been used as a fuel oxygenate in Orange County, California, the concentrations of TBA in ground water at gasoline spill sites are high com...
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ANAEROBIC TREATMENT OF A SIMULATED HIGH-STRENGTH INDUSTRIAL WASTEWATER CONTAINING CHLOROPHENOLS |
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An anaerobic fluidized-bed granular activated carbon (GAC) reactor employing carbon replacement was evaluated for the treatment of a simulated high strength industrial wastewater c...
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ANAEROBIC TREATMENT OF HIGH-STRENGTH INDUSTRIAL WASTES BEARING SEMI-VOLATILES RCRA COMPOUNDS |
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The potential of the anaerobic, expanded-bed, granular activated carbon (GAC) reactor in treating a high-strength waste containing RCRA semivolatile organic compounds was studied. ...
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ANAEROBIC-AEROBIC TREATMENT PROCESS FOR THE REMOVAL OF PRIORITY POLLUTANTS |
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The removal of 4,6-dinitro-o-cresol (DNOC) was investigated using an anaerobic recycle fluidized bed reactor as a pretreatment stage followed by an activated sludge reactor. The DN...
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ANAEROBIC/AEROBIC BIODEGRADATION OF PENTACHLOROPHENOL USING GAC FLUIDIXED BED REACTORS: OPTIMIZATION OF THE EMPTY BED CONTACT TIME |
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An integrated reactor system has been developed to remediate pentachlorophenol (PCP) containing wastes using sequential anaerobic and aerobic biodegradation. Anaerobically, PCP was...
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ANALYSES OF ORGANIC AND INORGANIC MERCURY BY ATOMIC FLUORESCENCE SPECTROMETRY USING A SEMIAUTOMATIC ANALYTICAL SYSTEM |
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The present work describes an improved method for the determination of total and organic mercury by decreasing analysis time (use of a dual circuit), sample size, and handling proc...
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ANALYSIS AND CHARACTERIZATION OF ORGANIC CARBON COMPOUNDS IN ATMOSPHERIC PARTICULATE MATTER |
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A novel macroporous polymer material (Shodex) was evaluated as a stationary phase in liquid chromatography for the separation of a wide variety of aliphatic, oxygenates and polynuc...
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ANALYSIS OF AN AEROBIC FLUIDIZED BED REACTOR DEGRADING MTBE AND BTEX AT REDUCED EBCTS |
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The purpose of this study was to investigate the biodegradation of MTBE and BTEX using a fluidized bed reactor (FBR) with granular activated carbon (GAC) as a biological attachment...
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ANALYSIS OF CARBON MONOXIDE EXPOSURE FOR FOURTEEN CITIES USING HAPEM-MS3 (FINAL TECHNICAL REPORT) |
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This report describes results and findings of applying the Hazardous Air Pollutant Exposure Model (HAPEM) for mobile sources, Version 3. This version is formally known as HAPEM-M...
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ANALYSIS OF CARBONACEOUS AEROSOLS USING THE THERMAL OPTICAL TRANSMITTANCE AND THERMAL OPTICAL REFLECTANCE METHODS |
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Carbonaceous particulate typically represents a large fraction of PM2.5 (20 - 40%). Two primary techniques presently used for the analysis of particulate carbon are Thermal Optic...
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ANALYSIS OF COMMERCIAL CYLINDER GASES OF NITRIC OXIDE, SULFUR DIOXIDE, AND CARBON MONOXIDE AT SOURCE CONCENTRATIONS: RESULTS OF AUDIT 5 |
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Manufacturers of commercial cylinder gases supply standards with a certified analysis and a statement of accuracy. Generally, the level of accuracy is specified as a percentage of ...
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ANALYSIS OF EMISSIONS FROM RESIDENTIAL NATURAL GAS FURNACES |
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The paper gives emissions data from residential natural-gas furnaces and compares selected data to emissions data from residential oil furnaces and woodstoves. atural-gas furnace e...
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ANALYSIS OF EPA (ENVIRONMENTAL PROTECTION AGENCY) PROTOCOL GASES USED FOR CALIBRATION AND AUDITS OF CONTINUOUS EMISSION MONITORING SYSTEMS AND AMBIENT AIR ANALYZERS - RESULTS OF AUDIT 6 |
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A performance audit was conducted on EPA Protocol Gases used for calibration and audits of continuous emission monitoring systems and ambient air analyzers. Fifty gaseous pollutant...
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ANALYSIS OF HEAVY METALS IN STORMWATER |
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Sampling has been undertaken to determine the concentrations of heavy metals, both particle-associated and dissolved, in stormwater from several storm sewer outfalls in Monmouth Co...
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ANALYSIS OF HEAVY METALS IN STORMWATER |
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Stormwater sampling for colloidal and dissolved metals and organic carbon has been initiated at six outfalls draining locally-designated, nonindustrial land uses in Monmouth County...
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ANALYSIS OF HISTORICAL RADIATIVELY IMPORTANT TRACE GASES (RITG) EMISSION: DEVELOPMENT OF A TRACE GAS ACCOUNTING SYSTEM (T-GAS) FOR 14 COUNTRIES |
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The report gives results of a Phase 2 study to (1) develop and test a carbon dioxide (CO2) emissions model for 14 countries; (2) conduct a limited test of the model's forecasting c...
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ANALYSIS OF LEAD IN CANDLE PARTICULATE EMISSIONS BY XRF USING UNIQUANT 4 |
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As part of an extensive program to study the small combustion sources of indoor fine particulate matter (PM), candles with lead-core wicks were burned in a 46-L glass flow- through...
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ANALYSIS OF MACROINVERTEBRATE ASSEMBLAGES IN RELATION TO ENVIRONMENTAL GRADIENTS IN ROCKY MOUNTAIN STREAMS |
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Using redundancy analysis (RDA) and canonical correspondence analysis (CCA), we assessed relationships among chemical and physical characteristics and macroinvertebrate assemblages...
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ANALYSIS OF MODIFIED WET-AIR OXIDATION FOR SOIL DETOXIFICATION |
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The report presents the results of research on wet-air oxidation as a method for the destruction of hazardous wastes. For organics in the presence of large amounts of water, the wa...
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ANALYSIS OF PERFLUORINATED CARBOXYLIC ACIDS IN SOILS II: OPTIMIZATION OF CHROMATOGRAPHY AND EXTRACTION |
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With the objective of detecting and quantitating low concentrations of perfluorinated carboxylic acids (PFCAs), including perfluorinated octanoic acid (PFOA), in soils, we compared...
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ANALYSIS OF RELATIONSHIPS BETWEEN SYMPTOMS AND ENVIRONMENTAL FACTORS OVER TIME |
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Weekly respiratory symptom information was obtained on a random population of 3800 whites in Tucson. The authors asked weekly about 14 symptoms representing acute respiratory illne...
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ANALYSIS OF VOCS IN AMBIENT AIR USING MULTISORBENT PACKINGS FOR VOC ACCUMULATION AND SAMPLE DRYING |
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Solid multisorbent packings have been characterized for trapping and release efficiency of trace (10-20 ppbv in humidified zero air) volatile organic compounds (VOCs). he use of a ...
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ANALYSIS OF VOLATILE PRODUCTS FROM THE SLOW PYROLYSIS OF COAL |
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The report gives results of a study of the evolution of volatile matter from coals of various rank during fixed-and fluid-bed pyrolysis. The pyrolyses were performed at temperature...
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ANALYSIS OF WATER-SOLUBLE ORGANICS |
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The report gives results of several analytical procedures for separating and detecting non-extractable water-soluble organic material, including low molecular weight acids, alcohol...
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ANALYTICAL METHOD FOR THE DETERMINATION OF PHENYLGLUCURONIDE IN RAINBOW TROUT GILL WATER |
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Phenylglucuronide (PG), a primary phase II metabolite of phenol, can be excreted by fish through urine and feces, similar to mammals. In addition, it may also be possible to elimin...
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ANALYTICAL METHODS EVALUATION FOR APPLICABILITY IN LEACHATE ANALYSIS |
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In this study a round robin analysis of 10 leachate samples was conducted by 32 laboratories in the United States and Canada. Samples were analyzed for up to 28 parameters, includi...
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ANALYTICAL METHODS FOR A NATIONAL STUDY OF CHEMICAL RESIDUES IN FISH - I: POLYCHLORINATED DIBENZO-P-DIOXINS/DIBENZOFURANS |
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Analytical Methods were developed to determine the concentration of PCDD/PCDF in fish tissue for a national survey conducted by EPA. he method was designed to achieve a relatively ...
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ANNUAL CYCLE OF BLOOD CHEMISTRY MEASUREMENTS IN STRIPED MULLET (MUGIL CEPHALUS) AND PINFISH (LOGADON RHOMOBOIDES) FROM THE GULF OF MEXICO |
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Annual cycle measurements were made on serum sodium (Na), potassium (K), chloride (Cl), iron (Fe), magnesium (Mg), calcium (Ca), carbon dioxide (CO2), total protein (TP), albumin (...
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ANNUAL PHYTOPLANKTON METABOLISM IN NARRAGANSETT BAY CALCULATED FROM SURVEY FIELD MEASUREMENTS AND MICROCOSM OBERSERVATIONS |
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Field surveys of phytoplankton metabolism, based on oxygen changes, were made in Narragansett Bay from 1971-73. Annual daytime net production varied from 218 g C per sq m per yr in...
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ANTIMONY REMOVAL TECHNOLOGY FOR MINING INDUSTRY WASTEWATERS |
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This report assessed the current state-of-the-art of antimony removal technology for mining industry wastewaters. Through literature review and personal interviews, it was found th...
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APPARENT BIAS IN RIVER WATER INOCULUM FOLLOWING CENTRIFUGATION |
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We collected four measures of viable bacterial concentration (heterotrophic plate count, total coliform, fecal coliform, and Escherichia coli) and three measures of well color deve...
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APPLICATION ANALYSIS REPORT - DEMONSTRATION OF A TRIAL EXCAVATION AT THE MCCOLL SUPERFUND SITE |
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In June 1990, the U.S. Environmental Protection Agency’s Region IX Superfund Program, in cooperation with EPA’s Air and Energy Engineering Research Laboratory (AEERL), and EPA’s Su...
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APPLICATION OF A DUAL FINE PARTICLE SEQUENTIAL SAMPLER, A TAPERED ELEMENT OSCILLATING MICROBALANCE, AND OTHER AIR MONITORING METHODS TO ASSESS TRANSBOUNDARY INFLUENCE OF PM 2.5 |
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Transboundary influences of paniculate matter less than or equal to 2.5 um in aerodynamic diameter (PM2.5,) have been investigated in a U.S.-Mexican border region using a dual fi...
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APPLICATION OF BUOYANT MASS TRANSFER MEDIA TO HAZARDOUS MATERIAL SPILLS |
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A prototype system was designed and developed to slurry buoyant activated carbon into a static body of water. The process was developed to remove spilled soluable hazardous compoun...
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APPLICATION OF CAPILLARY SUPERCRITICAL FLUID CHROMATOGRAPHY TO THE ANALYSIS OF A MIDDLE DISTILLATE FUEL |
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The paper describes the application of capillary supercritical fluid chromatography (SFC) to the analysis of a middle distillate fuel. Small diameter (50 micrometer i.d.) fused sil...
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APPLICATION OF COMPUTER AIDED TOMOGRAPHY (CAT) TO THE STUDY OF MARINE BENTIC COMMUNITIES |
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Sediment cores were imaged using a Computer-Aided Tomography (CT) scanner at Massachusetts General Hospital, Boston, Massachusetts, United States. Procedures were developed, using ...
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APPLICATION OF EQUILIBRIUM PARTITIONING THEORY TO SOIL PAH CONTAMINATION (EXTERNAL REVIEW DRAFT) |
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In March 2004, ORD's Ecological Risk Assessment Support Center (ERASC) received a request from the Ecological Risk Assessment Forum (ERAF) to provide insight into the issue of whet...
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APPLICATION OF FINE SCALE AIR TOXICS MODELING WITH CMAQ TO HAPEM5 |
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This paper provides a preliminary demonstration of the EPA neighborhood scale modeling paradigm for air toxics by linking concentration from the Community Multiscale Air Quality (C...
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APPLICATION OF FLUORESCENCE SPECTROSCOPIC TECHNIQUES AND PROBES TO THE DETECTION OF BIOPOLYMER DEGRADATION IN NATURAL ENVIRONMENTS. (R825159) |
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The activities and substrate specificities of extracellular enzymes in natural systems are not well understood, despite their critical role in microbial remineralization of organic...
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APPLICATION OF ISOTHERMS FOR PREDICTIONS OF GAC PERFORMANCE: A PRELIMINARY ANALYSIS |
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An adsorption isotherm can be generally defined as an expression of the equilibrium, at constant temperature, relating the concentration of a species on an adsorbent surface to the...
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APPLICATION OF MICROWAVES IN BENIGN SYNTHESIS OF NANOMETALS AND NANOCOMPOSITES |
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A brief account of a greener preparation of nanoparticles that renders these materials less mobile in the environment, thus reducing or eliminating the use and generation of hazard...
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APPLICATION OF MODELING AND OPERATIONS RESEARCH TECHNIQUES TO DRINKING WATER SYSTEMS |
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Mathematical modeling and operations research techniques are used to optimize the various subsystems that make up the total urban water system. An example is given using branch and...
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APPLICATION OF PULSE COMBUSTION TO SOLID AND HAZARDOUS WASTE INCINERATION |
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The paper discusses the application of pulse combustion to solid and hazardous waste incineration. otary kiln incinerator simulator was retrofitted with a frequency-tunable pulse c...
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APPLICATION OF STABLE CARBON AND HYDROGEN ISOTOPIC TECHNIQUES FOR MONITORING BIODEGRADATION OF MTBE IN THE FIELD |
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A significant challenge in environmental studies is to determine the onset and extent of MTBE bioremediation at an affected site, which may involve indirect approaches such as ...
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APPLICATION OF THE MICROENVIRONMENT MONITORING APPROACH TO ASSESS HUMAN EXPOSURE TO CARBON MONOXIDE |
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Exposure estimates based on monitoring carbon monoxide in microenvironments are compared to exposure estimates based on personal monitoring with individual, portable monitors. Meth...
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APPLICATION OF TOPOGRAPHICALLY DISTRIBUTED MODELS OF ENERGY, WATER AND CARBON BALANCE OVER THE COLUMBIA RIVER BASIN: A FRAMEWORK FOR SIMULATING POTENTIAL CLIMATE CHANGE AT THE REGIONAL SCALE |
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The investigation of many issues relating to global change is dependent on spatially distributed models of land surface processes. hese models may originate as point models, and th...
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APPLICATIONS ANALYSIS REPORT: AWD TECHNOLOGIES, INC AQUADETOX®/SVE TECHNOLOGY |
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In support of the U.S. Environmental Protection Agency’s (EPA) Superfund Innovative Technology Evaluation (SITE) Program, this report evaluates the AWD Technologies, Inc., integrat...
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APPLICATIONS ANALYSIS REPORT: BIOLOGICAL TREATMENT OF WOOD PRESERVING SITE GROUNDWATER BY BIOTROL, INC. |
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This report is an evaluation of the Biotrol, Inc. Aqueous Treatment System (BATS), a fixed-film, aerobic biological treatment process for contaminated groundwaters and other wastew...
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APPLICATIONS ANALYSIS REPORT: CAV-OX CAVITATION OXIDATION PROCESS |
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The CAV-OX process was developed by magnum Water Technology to destroy organic The process uses hydrodynamic cavitation, ultraviolet (UV) peroxide to oxidize organic compounds pres...
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APPLICATIONS OF PULSE COMBUSTION IN INDUSTRIAL AND INCINERATION PROCESSES |
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The paper describes a recently developed approach for using a tunable pulse combustor (PC) to improve the performance of energy intensive industrial processes (e. g., drying, calci...
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APPLICATIONS OF SENSITIVITY ANALYSIS TO A PHYSIOLOGICALLY BASED PHARMACOKINETIC MODEL FOR CARBON TETRACHLORIDE IN RATS |
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Physiologically-based pharmacokinetic (PBPK) models developed from gas uptake experiments have been used to estimate metabolic parameters for different volatile organic compounds. ...
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APPLICATIONS OF SUPERCRITICAL FLUID TECHNOLOGY TO POLLUTION PREVENTION AND WASTE MINIMIZATION |
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The applications of supercritical fluid extraction (SFE) to environmental problems can yield significant benefits because of the solvent properties and low toxicity of the availabl...
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APPRAISAL OF POWDERED ACTIVATED CARBON PROCESSES FOR MUNICIPAL WASTEWATER TREATMENT |
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Powdered activated carbon has been the subject of several developmental efforts directed towards producing improved methods for treating municipal wastewaters. Granular activated c...
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APPROACHES FOR MEASURING STABLE CARBON AND NITROGEN ISOTOPES IN BACTERIA |
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Stable isotopes have been used successfully over the past three decades to trace through aquatic food chairs. his technique, however, has only recently been used to examine aquatic...
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APPROACHES FOR REMEDIATION OF FEDERAL FACILITY SITES CONTAMINATED WITH EXPLOSIVE/RADIOACTIVE WASTE |
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Military operations have resulted in the contamination of soil and ground water at many federal facility sites. everal of these sites are undergoing corrective action to reduce ris...
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ARE CARS OR TREES MORE IMPORTANT TO PARTICULATE MATTER AIR POLUTION? WHAT RADIOCARBON MEASUREMENTS HAVE TO SAY |
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Air pollution in the form of particulate matter (PM) originates from both human activities and "natural" phenomena. Setting and achieving National Ambient Air Quality Standards (N...
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AROMATIC HYDROCARBON DEGRADATION: A MOLECULAR APPROACH |
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Aromatic hydrocarbons have a ubiquitous distribution in nature. he majority of these compounds are formed through the pyrolysis of organic matter. yrolysis at high temperatures lea...
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ARSENIC GEOCHEMICAL BEHAVIOR DURING GROUND WATER-SURFACE WATER INTERACTIONS AT A CONTAMINATED SITE |
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Research results will be presented that address arsenic mobilization and cycling mechanisms at a Superfund site in eastern Massachusetts. The site is located in the headwaters of t...
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ARSENIC SOLID-PHASE PARTITIONING IN REDUCING SEDIMENTS OF CONTAMINATED WETLAND |
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The geochemical partitioning of arsenic in organic-rich sediments from a contaminated wetland is examined using X-ray absorption spectroscopy and selective chemical extraction proc...
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ASPECTS OF SPATIAL AND TEMPORAL AGGREGATION IN ESTIMATING REGIONAL CARBON DIOXIDE FLUXES FROM TEMPERATE FOREST SOILS |
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We examine the influence of aggregation errors on developing estimates of regional soil-CO2 flux from temperate forests. e find daily soil-CO2 fluxes to be more sensitive to change...
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ASSESSING BRAZIL'S CARBON BUDGET: I. BIOTIC CARBON POOLS |
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Brazil contains the world's largest expanse of tropic forest, butits forests are experiencing high levels of conversion to otheruses. here is concern that releases of CO2 and other...
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ASSESSING EXPOSURES TO MOBILE SOURCE AIR TOXIC EMISSIONS FOR POPULATIONS LIVING NEAR ROADWAYS |
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A growing number of epidemiological studies have identified an increase in occurrence of adverse health effects for populations living near major roads. However, the biological me...
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ASSESSING HIPPOCAMPAL CHANGES INDICATIVE OF NEUROTOXIC EFFECTS. |
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Subtle changes in cognitive function are often the earliest indication of neurotoxic effects in humans. The hippocampus is a large forebrain structure subserving specific kinds o...
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ASSESSING ROOT DEMOGRAPHY AND CARBOHYDRATE DYNAMICS OF ZOSTERA MARINA |
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To help establish protective criteria for Zostera marina a more complete understanding of the factors affecting the status, condition, distribution and ecophysiology of Z. marina i...
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ASSESSING THE ECOLOGICAL CONDITION OF VERACRUZ, MX ESTUARIES |
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As part of an international technology transfer activity between EPA's Office of Research and Development and the state of Veracruz's Sub-secretary of the Environment, 50 stations ...
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ASSESSING THE EFFECTS OF GLOBAL CLIMATE CHANGE ON THE PRODUCTION AND MORTALITY OF DOUGLAS FIR FINE ROOTS USING MINIRHIZOTRONS |
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Fine roots (roots 2 mm in diameter) are one of the principal absorptive surfaces for water and nutrients in terrestrial plants. As such they are vital for plant growth and surviv...
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ASSESSING THE IMPACT OF LANDUSE/LANDCOVER ON STREAM CHEMISTRY IN MARYLAND |
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Spatial and statistical analyses were conducted to investigate the relationships between stream chemistry (nitrate, sulfate, dissolved organic carbon, etc.), habitat and satellite-...
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ASSESSMENT FOR FUTURE ENVIRONMENTAL PROBLEMS - AGRICULTURAL RESIDUES |
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This assessment was undertaken to determine whether agricultural burning constitutes an environmental problem in the United States. Preliminary indications are that agricultural bu...
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ASSESSMENT OF ALTERNATIVE MANAGEMENT PRACTICES AND POLICIES AFFECTING SOIL CARBON IN AGROECOSYSTEMS OF THE CENTRAL UNITED STATES |
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The goal of the U.S. EPA BIOME Agroecosystems Assessment Project is to evaluate the degree to which agroecosystems can be technically managed, on a sustainable basis, to conserve a...
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ASSESSMENT OF BEST AVAILABLE TECHNOLOGY ECONOMICALLY ACHIEVABLE FOR SYNTHETIC RUBBER MANUFACTURING WASTEWATER |
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An assessment of The Best Available Technology Economically Achievable (BATEA) for treatment of synthetic rubber manufacturing wastewaters has been conducted. This assessment was b...
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ASSESSMENT OF COAL CONVERSION WASTEWATERS: CHARACTERIZATION AND PRELIMINARY BIOTREATABILITY |
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The report gives results of the first phase of a project to assess the environmental impact of coal conversion wastewaters and to evaluate, by bench-scale tests, alternative treatm...
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ASSESSMENT OF FUNCTIONAL, MORPHOLOGICAL AND ENZYMATIC TEST FOR ACUTE NEPHROTOXICITY INDUCED BY MERCURIC CHLORIDE |
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The relative merits of a comprehensive series of contemporary methods for detection of acute nephrotoxicity were evaluated. Male Sprague-Dawley rats were given 0, 0.25, 0.5, 1.0, o...
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ASSESSMENT OF POTENTIAL HEALTH RISKS OF GASOLINE OXYGENATED WITH METHYL TERTIARY BUTYL ETHER |
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This assessment of potential inhalation health risks associated with MTBE in gasoline drew upon the results of recent studies first reported at the "Conference on MTBE and Other Ox...
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ASSESSMENT OF PROMISING FOREST MANAGEMENT PRACTICES AND TECHNOLOGIES FOR ENHANCING THE CONSERVATION AND SEQUESTRATION OF ATMOSPHERIC CARBON AND THEIR COSTS AT SITE LEVEL |
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The objectives of this report are to assess and synthesize current knowledge on three policy-science topics: ) Identify promising technologies and practices that could be utilized ...
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ASSESSMENT OF SULFATE REDUCTION RATES IN LABORATORY EXPERIMENTS |
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Two successful field demonstrations of sulfate reducing bacteria (SRB) bioreactors showed needs for research: 1) improve the understanding of the processes in the bioreactor and it...
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ASSESSMENT OF THE ADEQUACY OF THE APPENDIX F QUALITY ASSURANCE PROCEDURES FOR MAINTAINING CEMS (CONTINUOUS EMISSION MONITORING SYSTEMS) DATA ACCURACY (STATUS REPORT NO. 1) |
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This report summarizes the first year's audit results of Continuous Emission Monitoring Systems (CEMS) installed at scrubber-equipped power plants. The audits were conducted to sup...
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ASSESSMENT OF THE LIQUID WATER CONTENT OF SUMMERTIME AEROSOL IN THE SOUTHEAST UNITED STATES |
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The concentration of aerosol liquid water mass represents an important parameter for understanding the physical properties of PM2.5 in the atmosphere. Increases in ambient relati...
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ASSESSMENT OF THE MUTAGENIC POTENTIAL OF CARBON DISULFIDE, CARBON TETRACHLORIDE, DICHLOROMETHANE, ETHYLENE DICHLORIDE, AND METHYL BROMIDE: A COMPARATIVE ANALYSIS IN RELATION TO ETHYLENE DIBROMIDE |
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The document provides an evaluation of the mutagenic potential of five alternative fumigants to ethylene dibromide(EDB). These include carbon disulfide(CS2), carbon tetrachloride(C...
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ASSESSMENT OF THE PROPENSITY FOR COVALENT BINDING OF ELECTROPHILES TO BIOLOGICAL SUBSTRATES |
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Electrophilic character is associated with the ability of external agents to interact with centers of electron density in biological macromolecules and to cause the interruption or...
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ASSESSMENT OF THE RISK OF SOLAR ULTRAVIOLET RADIATION TO AMPHIBIANS. II: IN SITU CHARACTERIZATION OF SOLAR ULTRAVIOLET RADIATION IN AMPHIBIAN HABITATS |
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Ultraviolet B (UVB) radiation has been hypothesized as a potential cause of amphibian population declines and increased incidences of malformations. Realistic studies documenting U...
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ASSESSMENT OF THE TEMPORAL RELATIONSHIP BETWEEN DAILY SUMMERTIME ULTRAFINE PARTICULATE COUNT CONCENTRATION WITH PM2.5 AND BLACK CARBON SOOT IN WASHINGTON, DC |
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NO ABSTRACT PROVIDED...
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ASSESSMENT OF THE WINTER-TIME PERFORMANCE OF DEVELOPMENTAL PARTICULATE MATTER FORECASTS WITH THE ETA-CMAQ MODELING SYSTEM |
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It is desirable for local air quality agencies to accurately forecast tropospheric PM2.5 concentrations to alert the sensitive population of the onset, severity and dura...
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ASSIMILABLE ORGANIC CARBON & DISTRIBUTION SYSTEM QUALITY |
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The biological stability of treated drinking water is important to the U.S. EPA and to water utilities because of concern for compliance with the coliform MCL. he level of assimila...
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ASSIMILATION EFFICIENCY BY 'PROCAMBARUS CLARKII' FED ELODEA 'EGERA DENSA' AND ITS PRODUCTS OF DECOMPOSITION |
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Elodea cut into two initial particle sizes (2.0 cm sections and 3.0 millimeter sq fragments) underwent microbial decomposition for periods of 0, 15, 33, and 45 days, and then was f...
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ASSIMILATION OF OIL-DERIVED CARBON AND REMEDIAL NITROGEN APPLICATIONS BY INTERTIDAL FOOD CHAINS ON A CONTAMINATED BEACH IN PRINCE WILLIAM SOUND, ALASKA |
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NO ABSTRACT PROVIDED...
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ASSOCIATIONS BETWEEN AIR POLLUTION AND MORTALITY IN PHOENIX, 1995-1997 |
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We evaluated the association between mortality outcomes in elderly individuals and particulate matter (PM) of varying aerodynamic diameters (in micrometers) [PM10, PM2.5, and PMC...
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ASSOCIATIONS BETWEEN OUTDOOR PARTICULATE (PM2.5) CONCENTRATIONS AND GASEOUS CO-POLLUTANT EXPOSURE LEVELS FOR COPD AND MI COHORTS IN ATLANTA, GA |
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Epidemiological studies indicate that daily ambient particulate matter (PM2.5) concentrations are associated with increased mortality, hospital admissions, and respiratory and ca...
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ATMOSPHERIC CHEMISTRY OF SELECTED SULFUR-CONTAINING COMPOUNDS OUTDOOR SMOG CHAMBER STUDY - PHASE 1 |
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The chemical behavior of hydrogen sulfide, carbonyl sulfide, carbon sulfide, methanethiol, ethanethiol, methyl sulfide, ethylsulfide, methyl-disulfide, ethyldisulfide, methylethyls...
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ATMOSPHERIC MERCURY SIMULATION USING THE CMAQ MODEL: FORMULATION DESCRIPTION AND ANALYSIS OF WET DEPOSITION RESULTS |
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The Community Multiscale Air Quality (CMAQ) modeling system has recently been adapted to simulate the emission, transport, transformation and deposition of atmospheric mercury in t...
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ATMOSPHERIC PERSISTENCE OF EIGHT AIR TOXICS |
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Atmospheric lifetimes were estimated for eight air toxic chemicals (i.e., methylene chloride, chloroform, carbon tetrachloride, ethylene dichloride, trichloroethylene, perchloroeth...
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ATOM TRANSFER RADICAL POLYMERIZATION IN SUPERCRITICAL CARBON DIOXIDE. (R826735) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ATTENUATION OF POLYBROMINATED BIPHENYLS AND HEXACHLOROBENZENE BY EARTH MATERIALS |
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The aqueous solubility, adsorption, mobility, and microbial degradation of polybrominate biphenyls (PBBs) and hexachlorobenzene (HCB) were studied under laboratory conditions. Stud...
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AUTOMOTIVE EXHAUST AND MOUSE ACTIVITY: RELATIONSHIPS BETWEEN POLLUTANT CONCENTRATIONS AND DECREASES IN WHEEL RUNNING |
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Groups of male and female mice inhaled either clean air, 100 ppm carbon monoxide, or light-irradiated and nonirridiated automotive exhaust containing nominally 25, 50, 75, or 100 p...
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AVAILABILITY OF DISSOLVED ORGANIC CARBON TO BACTERIOPLANKTON EXAMINED BY OXYGEN UTILIZATION |
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Oxygen consumption is used to study the dynamics of dissolved organic carbon utilization by bacteria. ncubation experiments (20d) for different dates and in different estuarine loc...
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Air Pollution Monitoring Site Selection by Multiple Criteria Decision Analysis |
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Criteria air pollutants (particulate matter, sulfur dioxide, oxides of nitrogen, volatile organic compounds, and carbon monoxide) as well as toxic air pollutants are a global conce...
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Anaerobic Biodegradation of Ethylene Dibromide and 1,2-Dichloroethane in the Presence of Fuel Hydrocarbons |
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Field evidence from underground storage tank sites where leaded gasoline leaked indicates the lead scavengers 1,2- dibromoethane (ethylene dibromide, or EDB) and 1,2- dichloroethan...
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Application of Stable Carbon Isotope Ratios to Recognize Natural Biodegradation of MTBE |
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The organisms that degrade MTBE under anaerobic conditions are evolved to acquire energy for growth by using molecular hydrogen and carbonate ion to cleave methyl ether bonds. Met...
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Applications Of Nanomaterials In Risk Management Of Environmental Pollutants: The Use Of Bimetallic Systems |
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Remediation of sediments and water contaminated hydrophobic organic chemicals (HOCs) such as polychlorinated biphenyls (PCBs) remains a scientific and technical challenge. PCBs-co...
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Applications of Nano Reactive Materials in Remediation of Persistence Organic Pollutants in Sediments and Groundwater - Presentation |
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Remediation of sediments and water contaminated hydrophobic organic
chemicals (HOCs) such as polychlorinated biphenyls (PCBs) remains a scientific and technical challenge. PCBs-co...
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Arsenic Removal from Drinking Water by Adsorptive Media U.S. EPA Demonstration Project at Wellman, TX, Six-Month Evaluation Report |
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This report documents the activities performed and the results obtained from the first six months of the arsenic removal treatment technology demonstration project in the City of W...
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BACKGROUND HYDROCARBON RESIDUES IN FISHES FROM THE GREAT LAKES AND EASTERN MONTANA |
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For the past eight years, this laboratory has been conducting GC/MS exploration studies of organic chemical residues in fishes from major U.S. watersheds. One of the frequently occ...
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BACTERIA ASSOCIATED WITH GRANULAR ACTIVATED CARBON PARTICLES IN DRINKING WATER |
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A sampling protocol was developed to examine particles released from granular activated carbon filter beds. A gauze filter/Swinnex procedure was used to collect carbon fines from 2...
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BACTERIA ATTACHED TO GRANULAR ACTIVATED CARBON IN DRINKING WATER |
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Laboratory and field studies were undertaken to answer basic questions about the influence of granular activated carbon (GAC) on the bacteriological quality of drinking water. A sa...
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BACTERIAL COLONIZATION OF POINT-OF-USE WATER TREATMENT DEVICES |
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Point-of-use water treatment devices were investigated for types of organisms that may colonize these filters, the magnitude of microbial post colonization release in the product w...
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BACTERIAL GROWTH EFFICIENCY ON NATURAL DISSOLVED ORGANIC MATTER |
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Bacterial growth efficiency was examined in batch cultures and continuous flow cultures. atural assemblages of pelagic bacteria were inoculated into particle free water and growth ...
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BACTERIAL TOC (TOTAL ORGANIC CARBON) REMOVAL ON SAND AND GAC (GRANULAR ACTIVATED CARBON) |
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A method is developed to separate the effects of adsorption and biodegradation in long term total organic carbon (TOC) removal observed on GAC contactors. TOC removal is compared o...
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BACTERIALLY-MEDIATED DEGRADATION OF A CHIRAL DISINFECTION BYPRODUCT |
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Disinfection of drinking and waste waters, through chlorination, can result in the production of chlorinated organic compounds, many of which are regulated by the U.S. Environmenta...
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BACTERIOPLANKTON DYNAMICS IN A SUBTROPICAL ESTUARY: EVIDENCE FOR SUBSTRATE LIMITATION |
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Bacterioplankton abundance and metabolic characteristics were measured along a transect in Pensacola Bay, Florida, USA, to examine the factors that control microbial water column p...
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BACTERIOPLANKTON DYNAMICS IN PENSACOLA BAY, FL, USA: ROLE OF PHYTOPLANKTON AND DETRIAL CARBON SOURCES |
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Bacterioplankton Dynamics in Pensacola Bay, FL, USA: Role of Phytoplankton and Detrital Carbon Sources (Abstract). To be presented at the16th Biennial Conference of the Estuarine ...
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BASE-CATALYZED DESTRUCTION OF PCBS-NEW DONORS, NEW TRANSFER AGENTS/CATALYSTS |
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The use of hydrogen transfer agents and catalysts to improve the base-catalyzed decomposition of polychlorinated biphenyls (PCBs) was investigated. The reaction proceeded only in t...
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BASELINE SEDIMENT CHARACTERISTICS AND SEDIMENTATION PATTERNS ON THE VIRGINIA PORTION OF THE CHESAPEAKE BAY |
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The distribution patterns of sediment physical properties, deposition patterns, and sediment accumulation rates provide an integrating framework for investigations of toxic substan...
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BASIS FOR PRIMARY AIR QUALITY CRITERIA AND STANDARDS |
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The Environmental Criteria and Assessment Office and the Office of Air Quality Planning and Standards are charged with responsibility for reviewing and assessing air quality criter...
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BEHAVIORAL EFFECTS OF CARBON MONOXIDE: BETA ANALYSES AND EXTRAPOLATIONS |
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In the absence of reliable data, the present work was performed to estimate the dose effect function of carboxyhemoglobin (COHb) on behavior in humans. y meta analysis, a COHb-beha...
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BELOWGROUND CARBON ALLOCATION IN FORESTS ESTIMATED FROM LITTERFALL AND IRGA-BASED SOIL RESPIRATION MEASUREMENTS. (R828309) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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BELOWGROUND HYDRO-PHYSIOLOGY AND THE IMPLICATIONS FOR ABOVEGROUND CARBON GAIN |
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abstract/abstract...
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BELOWGROUND PROCESSES IN FOREST-ECOSYSTEM BIOGEOCHEMICAL SIMULATION MODELS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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BENCH SCALE EVALUATION OF RESINS AND ACTIVATED CARBONS FOR WATER PURIFICATION |
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Adsorption isotherms and bench scale column studies were used to compare the performance of five types of commercially available activated carbon and four types of resin for the re...
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BENCH-SCALE INVESTIGATION OF MECHANISMS OF ELEMENTAL MERCURY CAPTURE BY ACTIVATED CARBON |
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The paper gives results of an investigation of the sorption and desorption of gaseous elemental mercury by activated carbon sorbents. wo sorbents were chosen for the study, one (PC...
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BENTHIC AMPHIPOD COMMUNITY RESPONSE TO STRESS INDUCED BY ALGAL MATS IN A PACIFIC NORTHWEST ESTUARY |
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Amphipod, algal biomass and sediment samples were taken at two- to four-week intervals from June through December, 2000 along lines perpendicular to two transects in Yaquina Bay, O...
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BENTHIC MACROFAUNA-HABITAT ASSOCIATIONS IN WILLAPA BAY, WASHINGTON, USA |
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Estuary-wide benthic macrofauna-habitat associations in Willapa Bay, Washington, United States, were determined for 4 habitats (eelgrass [Zostera marina], Atlantic cordgrass [Spart...
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BENTHIC PRODUCTION AS THE BASE FOR FOOD WEBS IN ALASKAN ARCTIC LAKES |
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Plankton are traditionally viewed as the basis for limnetic food webs, with zooplankton acting as an energy gateway between phytoplanktonic primary producers and fish. Often, benth...
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BENTHOS AS THE BASIS FOR ARCTIC FOOD WEBS |
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Plankton have traditionally been viewed as the basis for limnetic food webs, with zooplankton acting as a gateway for energy passing between phytoplanktonic primary producers and f...
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BENZENE AND NAPHTHALENE SORPTION ON SOIL CONTAMINATED WITH HIGH MOLECULAR WEIGHT RESIDUAL HYDROCARBONS FROM UNLEADED GASOLINE |
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For complex nonaqueous phase liquids (NAPLs), the composition of the NAPL retained in the pore space of geologic material weathers until the residual NAPL no longer acts a liquid a...
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BILATERAL WASTEWATER LAND TREATMENT RESEARCH BY CHINA AND THE USEPA |
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This study was conducted to evaluate the rapid infiltration (R.I.) method of land treatment as a partial solution to wastewater treatment and reuse for the 0.45 billion m3/yr (15.7...
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BIO-ETHANOL FUELS: SHORT-TERM SOLUTIONS, LONG-TERM DISASTERS |
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Ethanol derived from bio-mass is often advocated as a significant contributor to possible solutions to our need for a sustainable transportation fuel. Substituting bio-ethanol for...
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BIOASSAY PROCEDURE FOR PREDICTING COLIFORM BACTERIAL GROWTH IN DRINKING WATER |
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Water quality degradation due to the growth of microorganisms Is an area of concern for many water utilities. urrently the nutrient status of drinking water is difficult to measure...
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BIOASSAY-DIRECTED CHEMICAL ANALYSIS OF ORGANIC EXTRACTS OF EMISSIONS FROM A LABORATORY-SCALE INCINERATOR: COMBUSTION OF SURROGATE COMPOUNDS |
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The paper describes using a prototype/pilot-scale rotary kiln (73 kill) to examine the chemical composition and biological effect's of emissions produced when operating the kiln un...
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BIOAVAILABILITY OF METALS IN CONTAMINATED SOIL AND DUST |
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Due to widespread metal contamination, it is necessary to characterize soils suspected of metal contamination and determine if the metal levels in these soils pose a hazard. Met...
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BIOAVAILABILITY OF METHYL MERCURY TO SACRAMENTO BLACKFISH (ORTHODON MICROLEPIDOTUS): DISSOLVED ORGANIC CARBON (DOC) EFFECTS. (R825433) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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BIOCHEMICAL EFFECTS OF THREE CARCINOGENIC CHLORINATED METHANES IN RAT LIVER |
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Three chlorinated methanes, carbon tetrachloride, chloroform and methylene chloride known to cause liver tumors in rodents, were given by oral gavage to adult female rats both 21 a...
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BIOCONCENTRATION OF A HEXACHLOROBIPHENYL IN GREAT LAKES PLANKTONIC ALGAE |
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The bioconcentration of 2,4,5,2',4',5'-hexachlorobiphenyl (HCB) was examined in the Great Lakes algae Fragilaria crotonensis, Ankistrodesmus falcatus, and Microcystis sp. The bioco...
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BIODEGRADABILITY OF ALKYLATES AS A SOLE CARBON SOURCE IN THE PRESENCE OF ETHANOL OR BTEX |
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The biodegradability of alkylate compounds in serum bottles was investigated in the presence and absence of ethanol or benzene, toluene, ethylbenzene, and p-xylene (BTEX). T...
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BIODEGRADATION - MONITORED NATURAL ATTENUATION (MNA) FOR OXYGENATES: HOW IT EVOLVED, WHY IT OCCURS AND STABLE ISOTOPES |
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The organisms that degrade MtBE under anaerobic conditions are evolved to acquire energy for growth by using molecular hydrogen and carbonate ion to cleave methyl ether bonds. Met...
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BIODEGRADATION AND CARBON ADSORPTION CARCINOGENIC AND HAZARDOUS ORGANIC COMPOUNDS |
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This research program was conducted to determine the capability of biological treatment and activated carbon adsorption to remove chemical carcinogens and other hazardous organic c...
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BIODEGRADATION DURING CONTAMINANT TRANSPORT IN POROUS MEDIA. 4. IMPACT OF MICROBIAL LAG AND BACTERIAL CELL GROWTH. (R825415) |
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AbstractMiscible-displacement experiments were conducted to examine the impact of microbial lag and bacterial cell growth on the transport of salicylate, a model hydroc...
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BIODEGRADATION OF ENVIRONMENTAL POLLUTANTS BY THE WHITE ROT FUNGUS PHANEROCHAETE CHRYSOSPORIUM |
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The white rot fungus, Phanerochaete chrysosporium secretes a unique hydrogen peroxide-dependent oxidase capable of degrading lignin, a highly complex, chemically resistant, non-rep...
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BIODEGRADATION OF METHYL TERT-BUTYL ETHER USING AN INNOVATIVE BIOMASS CONCENTRATOR REACTOR |
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The aerobic biodegradation of methyl tert-butyl ether (MTBE) was investigated using a pilot-scale Biomass Concentrator Reactor (BCR). The reactor was operated for a year a...
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BIODEGRADATION OF POLYCYCLIC AROMATIC HYDROCARBONS BY PHANEROCHAETE CHRYSOSPORIUM |
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The ability of the white rot fungus Phanerochaete chrysosporium to degrade polycyclic aromatic hydrocarbons (PAHS) that are present in anthracene oil (a distillation product obtain...
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BIODEGRADATION STUDIES OF CARBOXYMETHYL TARTRONATE |
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Carboxymethyl tartronate (CMT) was shown to be biodegradable in bench-scale activated sludge reactors. After initial exposure to CMT in continuous flow systems an acclimation perio...
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BIOFILMS IN DRINKING WATER DISTRIBUTION SYSTEMS |
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Virtually anywhere a surface comes into contact with the water in a distribution system, one can find biofilms. Biofilms are formed in distribution system pipelines when microbial ...
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BIOGENIC CONTRIBUTION TO PM-2.5 AMBIENT AEROSOL FROM RADIOCARBON MEASUREMENTS |
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Knowledge of the relative contributions of biogenic versus anthropogenic sources to ambient aerosol is of great interest in the formulation of strategies to achieve nationally ma...
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BIOGENIC CONTRIBUTIONS TO ATMOSPHERIC VOLATILE ORGANIC COMPOUNDS IN AZUSA CA |
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An objective of the 1997 Southern California Ozone Study (SCOS97) was to provide an up-to-date assessment of the importance of biogenic emissions for tropospheric ozone productio...
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BIOGENIC SOURCES FOR FORMALDEHYDE AND ACETALDEHYDE DURING SUMMER MONTHS |
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Photochemical modeling estimated contributions to ambient concentrations of formaldehyde and acetaldehyde from biogenic emissions over the continental United States during January ...
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BIOGENIC SOURCES OF FORMALDEHYDE AND ACETALDEHYDE DURING SUMMER AND WINTER CONDITIONS |
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Photochemical modeling estimated contributions to ambient concentrations of formaldehyde and acetaldehyde from biogenic emissions over the continental United States during January ...
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BIOGENIC VOLATILE ORGANIC COMPOUND EMISSIONS FROM A LOWLAND TROPICAL WET FOREST IN COSTA RICA |
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Twenty common plant species were screened for emissions of biogenic volatile organic compounds (BVOCS) at a lowland tropical wet forest site in Costa Rica. Ten of the species. exam...
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BIOGEOCHEMICAL CONTROLS ON REACTION OF SEDIMENTARY ORGANIC MATTER AND AQUEOUS SULFIDES IN HOLOCENE SEDIMENTS OF MUD LAKE FLORIDA |
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The distribution and quantity of organic sulfur and iron sulfur species were determined in the
Holocene sediments from Mud Lake, Florida. The sediments of this shallow, sinkhole...
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BIOGEOCHEMICAL CONTROLS ON REACTION OF SEDIMENTARY ORGANIC MATTER AND AQUEOUS SULFIDES IN HOLOCENE SEDIMENTS OF MUD LAKE FLORIDA: JOURNAL ARTICLE |
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JOURNAL NRMRL-ADA-00133
Filley,T.R., Freeman, K.H., Wilkin*, R.T., and Hatcher, P.G. Biogeochemical Controls on Reaction of Sedimentary Organic Matter and Aqueou...
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BIOGEOCHEMICAL EVIDENCE FOR MICROBIAL COMMUNITY CHANGE IN A JET FUEL HYDROCARBONS-CONTAMINATED AQUIFER |
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A glacio-fluvial aquifer located at Wurtsmith Air Force Base, Michigan, had been contaminated with JP-4 fuel hydrocarbons released after the crash of a tanker aircraft in October o...
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BIOGEOCHEMICAL INDICATORS OF ORGANIC WASTE CONTAMINATION IN GEORGIA PIEDMONT STREAMS |
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We monitored concentrations of nitrous oxide, methane, carbon dioxide, nutrients and other parameters (T, conductivity, dissolved oxygen, alkalinity, pH, DOC, DON, flow rate) in 17...
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BIOGEOCHEMICAL INDICATORS OF ORGANIC WASTE CONTAMINATION IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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We monitored concentrations of nitrous oxide, methane, carbon dioxide, nutrients and other parameters (T, conductivity, dissolved oxygen, alkalinity, pH, DOC, DON, flow rate) in 17...
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BIOGEOCHEMISTRY OF ALUMINUM IN MCDONALDS BRANCH WATERSHED, NEW JERSEY PINE BARRENS |
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Aluminum concentrations, fluxes, and storage were measured in the vegetation, forest floor, and acid, sandy mineral soil of a forested watershed in the New Jersey Pine Barrens. Vol...
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BIOGEOCHEMISTRY OF BENZANTHRACENE IN AN ENCLOSED MARINE ECOSYSTEM |
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Carbon-14 labeled benz(a)anthracene was introduced into a large-scale marine microcosm containing an ecosystem functioning in a manner that was in many respects typical of the shal...
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BIOGEOCHEMISTRY OF CHLORINATED ORGANIC CONTAMINANTS IN AQUATIC ECOSYSTEMS |
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Over the last several years we have conducted both laboratory and field studies to develop a better understanding of the movement of chlorinated organic compounds through aquatic e...
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BIOLOGICAL FEEDBACK TO CLIMATE CHANGE: TERRESTRIAL ECOSYSTEMS AS SINKS AND SOURCES OF CARBON AND NITROGEN |
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Life profoundly influences Earth's climate through its influences on the cycling and storage of chemical elements and the absorption and reflection of solar energy. he concept of f...
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BIOLOGICAL PROCESSES IN THE TREATMENT OF MUNICIPAL WATER SUPPLIES |
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The objective of this project was to study the use of Biologically Enhanced Granular Activated Carbon (BEGAC) technology in European water treatment plants and to determine its adv...
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BIOLOGICAL TREATMENT OF HIGH STRENGTH PHARMACEUTICAL WASTEWATER--A CASE HISTORY USING PAC (POWDERED ACTIVATED CARBON) TECHNOLOGY |
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From September to December 1984 pharmaceutical wastewater containing high concentrations of total chemical oxygen demand (TCOD) was treated in trailer mounted, activated sludge pil...
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BIOMARKER RESPONSES IN MACOMA NASUTA (BIVALVIA) EXPOSED TO SEDIMENTS FROM NORTHERN SAN FRANCISCO BAY. (R826940) |
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AbstractOur study investigates biomarker responses and survival of Macoma nasuta exposed to sediments collected from six locations in northern San Francisco Bay....
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BIOMARKERS OF EXPOSURE: A CASE STUDY WITH INORGANIC ARSENIC |
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Inorganic arsenic (iAs) is a human toxicant and carcinogen that is found in the environment as a natural contaminant and from anthropogenic sources. Most mammalian species metabol...
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BIOMASS AND FOSSIL FUEL TO METHANOL AND CARBON VIA THE HYDROCARB PROCESS |
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The paper discusses the production of methanol and carbon from biomass and fossil fuels, utilizing the Hydrocarbon process. This process has the potential to minimize dependence on...
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BIOMASS BURNING AND THE PRODUCTION OF METHANE |
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Biomass burning and its environmental implications have also become important research elements of the International Geosphere-Bio sphere Program and the International Global Atmos...
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BIOMASS CONTROL IN WASTE AIR BIOTRICKLING FILTERS BY PROTOZOAN PREDATION. (R825392) |
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Two protozoan species as well as an uncharacterized protozoan consortium were added to a toluene-degrading biotrickling filter to investigate protozoan predation as a means of biom...
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BIOPLUME III: NATURAL ATTENTUATION DECISION SUPPORT SYSTEM USER'S MANUAL - VERSION 1.0 |
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The BIOPLUME III program is a two-dimensional, finite difference model for simulating the natural attenuation of organic contaminants in ground water due to the processes of advec...
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BIOREMEDIATION |
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Bioremediation is a method for using the activities of microorganisms and-or plants to transform organic or inorganic compounds that may be harmful to humans, animals, plants or th...
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BIOREMEDIATION OF PETROLEUM HYDROCARBONS: A FLEXIBLE, VARIABLE, SPEED TECHNOLOGY |
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The bioremediation of petroleum hydrocarbons has evolved into a number of different processes. hese processes include in situ aquifer bioremediation, bioventing, biosparging, passi...
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BIOREMEDIATION TREATABILITY TRIALS USING NUTRIENT APPLICATION TO ENHANCE CLEANUP OF OIL-CONTAMINATED SHORELINE |
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On March 24, 1989, the supertanker Exxon Valdez went aground in Prince William Sound, Alaska, releasing approximately 11 million gallons of Prudhoe Bay crude oil. he spilled oil sp...
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BIOTA-SEDIMENT ACCUMULATION FACTORS FOR POLYCHLORINATED BIPHENYLS, DIBENZO-P-DIOXINS, AND DIBENZOFURANS IN SOUTHERN LAKE MICHIGAN LAKE TROUT (SALVELINUS NAMAYCUSH) |
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A set of high-quality, age-specific biota-sediment accumulation factors (BSAFs) for polychlorinated biphenyls (PCBs), dibenzo-p-dioxins (PCDDs), and dibenzofurans (PCDFs) have been...
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BIOTIC AND ABIOTIC CONTRIBUTIONS TO REDUCTIVE TRANSFORMATION OF ORGANIC POLLUTANTS |
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The relative contributions of biotic and abiotic reductive transformation reactions were probed in two anoxic freshwater sediments by following the transformation of nitrobenzene, ...
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BIOTRANSFORMATION AND GENOTOXICITY OF THE DRINKING WATER DISINFECTION BYPRODUCT BROMODICHLOROMETHANE: DNA BINDING MEDIATED BY GLUTATHIONE TRANSFERASE THETA 1-1 |
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The drinking water disinfection byproduct bromodichloromethane (CHBrCl2) was
previously shown to be mutagenic in Salmonella typhimurium that overexpress rat glutathione
trans...
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BIOTRANSFORMATION OF CHLORDECONE BY 'PSEUDOMONAS' SPECIES (JOURNAL VERSION) |
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Chlordecone, known under the tradename Kepone, is a highly chlorinated cyclodiene pesticide that is resistant to microbial degradation. Six month chlordecone enrichment cultures yi...
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BIOTRANSFORMATION OF MIXTURES OF CHLORINATED ALIPHATIC HYDROCARBONS BY AN ACETATE-GROWN METHANOGENIC ENRICHMENT CULTURE. (R825549C053) |
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Biotransformation of chlorinated aliphatic hydrocarbons under anaerobic conditions has received considerable attention due to the prevalence of these compounds as groundwater co...
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BIOTRANSFORMATION OF QUINOLINE AND METHYLQUINOLINES IN ANOXIC FRESHWATER SEDIMENT |
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Quinoline (Q) and some isomers of methylquinoline (MQ) were transformed to hydroxylated products in freshwater sediment slurries incubated under methanogenic conditions at 25 degre...
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BIOTRANSFORMATION OF TRICHLOROETHYLENE IN SOIL |
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The organic contaminants that are most commonly detected in groundwater are low-molecular-weight, chlorinated aliphatic hydrocarbons such as trichloroethylene (TCE), tetrachloroeth...
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BIOTREATABILITY OF A VADOSE ZONE SOIL CONTAMINATED WITH DIOCTYL PHTHALATE |
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Chemical spillage and waste disposal during 40 years of manufacturing vinyl wallcovering had contaminated portions of a field site with various organic chemicals, predominately xyl...
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BIOVENTING OF CHLORINATED SOLVENTS FOR GROUND-WATER CLEANUP THROUGH BIOREMEDIATION |
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Chlorinated solvents such as tetrachloroethylene, trichloroethylene, carbon tetrachloride, chloroform, 1,2-dichloroethane, and dichloromethane (methylene chloride) can exist in con...
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BLOOD LEUKOCYTE EXPRESSION OF LFA-1 AND ICAM-1 AFTER INHALATION OF ULTRAFINE CARBON PARTICLES. (R826781) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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BLOOD LEUKOCYTE EXPRESSION OF LFA-1 AND INTRACELLULAR ADHESION MOLECULE-1 (ICAM-1) AFTER INHALATION OF ULTRAFINE CARBON PARTICLES. (R827354C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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BMP FILTERS: UPFLOW VS. DOWNFLOW |
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Filtration methods have been found to be effective in reducing pollutant levels in stormwater. The main drawback of these methods is that the filters get clogged frequently and req...
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BOOK REVIEW: ESTUARINE SCIENCE: A SYNTHETIC APPROACH TO RESEARCH AND PRACTICE |
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This book is the product of fifty leading estuarine scientists most of whom attended a workshop convened for the purpose of "put[ting] together the case for synthesis of estuarine ...
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BOREAL FOREST CARBON STOCKS AND WOOD SUPPLY: PAST, PRESENT AND FUTURE RESPONSES TO CHANGING CLIMATE, AGRICULTURE AND SPECIES AVAILABILITY |
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The paper assesses the role in boreal forest growth played by environment. It examines past changes in climate coupled with glaciation, and future changes in climate coupled with a...
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BRAZIL'S CARBON BUDGET FOR 1990 |
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The recent history of deforestation in the Amazon region of Brazil is well known. ajor reason for alarm over the rate and magnitude of deforestation in Brazil has been concern that...
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BRAZIL'S LAND-BASED CO2 EXCHANGE FOR 1990 AND LINKS TO THE GLOBAL CARBON CYCLE |
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Corvallis scientists recently completed development of a country-level carbon budget for Brazil, concluding that the country is a net source of 174-233 Mgc/yr from land-based proce...
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BREAKPOINT CHLORINATION/ACTIVATED CARBON TREATMENT: EFFECT ON VOLATILE HALOGENATED ORGANICS |
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The production and removal of six volatile halogenated organic compounds during treatment of tertiary clarified and filtered wastewater by breakpoint chlorination and activated car...
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Behavorial effects of exposure to carbon monoxide (CO) |
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I. 43 reported human studies
II. Summary of findings
A. 21 found significant effects, 22 did not
B. Mean COHb was higher for non-
significant studies...
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Benthic versus Planktonic Foundations of Three Lake Superior Coastal Food Webs |
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The structure of aquatic food webs can provide information on system function, trophic dynamics and, potentially, responses to anthropogenic stressors. Stable isotope analyses in a...
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Biodegradation of polycyclic hydrocarbons by Phanerochaete chrysosporium |
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The ability of the white rot fungus Phanerochaete chrysosporium to degrade polycyclic aromatic hydrocarbons (PAHs) that are present in anthracene oil (a distillation product obtain...
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Biodegradation – Monitored Natural Attenuation (MNA) for Oxygenates: How it Evolved, why it Occurs and Using Stable Carbon Isotopes to Predict Plume Behavior |
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The organisms that degrade MtBE under anaerobic conditions are evolved to acquire energy for growth by using molecular hydrogen and carbonate ion to cleave methyl ether bonds. Met...
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Bioretention Monitoring: Designing Rain Gardens to Promote Nitrate Removal |
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Laboratory and field-scale studies of bioretention systems have often shown these structures to have a high capacity for removal of suspended solids, heavy metals, and phosphorus. ...
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Briefing on geological sequestration |
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Geological sequestration (GS) is generally recognized as the injection and long-term (e.g., hundreds to thousands of years) trapping of gaseous, liquid or supercritical carbon diox...
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Briefing on geological sequestration (Tulsa) |
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Geological sequestration (GS) is generally recognized as the injection and long-term (e.g., hundreds to thousands of years) trapping of gaseous, liquid or supercritical carbon diox...
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C, H, AND O COMPOUNDS - CYCLOPRATE, KINOPRENE, METHOPRENE, AND RESMETHRIN |
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A method was developed for the determination of four compounds containing only carbon, hydrogen, and oxygen (cycloprate, kinoprene, methoprene, and resmethrin), in wastewaters. The...
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CALCIUM OXIDE SINTERING IN ATMOSPHERES CONTAINING WATER AND CARBON DIOXIDE |
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The paper gives results of measurements of the effects of water vapor and C02 on the sintering rate of nascent CaO, as a function of partial pressure and temperature using CaO prep...
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CALCULATED MOLECULAR STRUCTURES AND POTENTIAL ENERGY FUNCTIONS OF PAHS WITH METHYL CROWDING IN THE BAY REGION AND THEIR METABOLITES: COMPARISON TO EXPERIMENTAL STRUCTURES |
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Abstract Title: Calculated molecular structures and potential energy functions of P AHs with methyl crowding in the bay region and their metabolites: Comparison to experimental st...
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CALCULATED MOLECULAR STRUCTURES AND POTENTIAL ENERGY FUNCTIONS OF PAHS WITH METHYL CROWDING IN THE BAY REGION AND THEIR METABOLITES: COMPARISON TO EXPERIMENTAL STRUCTURES |
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Calculated molecular structures and potential energy functions ofP AHs with methyl crowding in the bay region and their metabolites: Comparison to experimental structures
P...
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CAN INTENSIVE MANAGEMENT INCREASE CARBON STORAGE IN FORESTS? |
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A possible response to increasing atmospheric CO2 concentration is to attempt to increase the amount of carbon stored in terrestrial vegetation. ne approach to increasing the size ...
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CAPILLARY ELECTROPHORESIS MICROCHIP WITH A CARBON-NANOTUBE ELECTROCHEMICAL DETECTOR. (R830900) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CAPROLACTAM RECOVERY FROM AQUEOUS MANUFACTURING STREAMS |
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Pilot-plant runs using plant samples have demonstrated the feasibility of a novel extraction process for caprolactam recovery from dilute aqueous solutions. Following extraction, a...
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CAPSTONE REPORT ON THE APPLICATION, MONITORING, AND PERFORMANCE OF PERMEABLE REACTIVE BARRIERS FOR GROUND-WATER REMEDIATION: VOL. 2 LONG-TERM MONITORING OF PRBS: SOIL AND GROUND WATER SAMPLING |
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This report discusses soil and ground-water sampling methods and procedures used to evaluate the long-term performance of permeable reactive barriers (PRBS) at two sites, Elizabeth...
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CAPTAN HYDROLYSIS |
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Captan (N-(trichloromethylthio)-4-cyclohexene-1,2-dicarboximide) undergoes hydrolysis readily in water with a maximum half-life of 710 min. Over the pH range 2-6, the reaction is p...
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CARBOHYDRATE USE AND ASSIMILATION BY LITTER AND SOIL FUNGI ASSESSED BY CARBON ISOTOPES AND BIOLOG ASSAYS |
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Soil fungi are integral to decomposition in forests, yet identification of probable functional roles of different taxa is problematic. Here, we compared carbohydrate assimilation ...
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CARBON ADSORPTION FOR INDOOR AIR CLEANING |
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The paper discusses the use of carbon adsorption for indoor air cleaning, focusing on the removal of volatile organic compounds (VOCs) using granular activated carbon (GAC). t addr...
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CARBON ADSORPTION ISOTHERMS FOR TOXIC ORGANICS |
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An experimental protocol for measuring the activated carbon adsorption isotherm was developed and applied to a wide range of organic compounds. Methods for treatment of the isother...
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CARBON ALLOCATION AND PARTITIONING IN ASPEN CLONES VARYING IN SENSITIVITY TO TROPOSPHERIC OZONE |
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NO ABSTRACT PROVIDED...
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CARBON AND NITROGEN ALLOCATION MODEL FOR THE SEAGRASS THALASSIA TESTUDUNUM IN LOWER LAGUNA MADRE |
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Inverse modeling methods are a powerful tool for understanding complex physiological relationships between seagrasses and their environment. The power of the method is a result o...
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CARBON AND NITROGEN ALLOCATION MODEL FOR THE SUB-TROPICAL SEAGRASS THALASSIA TESTUDINUM AND THE TEMPERATE SEAGRASS ZOSTER MARINA |
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Our understanding of seagrass physiology is based on crude estimates of production and biomass. To better understand the complex physiological relationships between the plants and ...
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CARBON AND NITROGEN POOLS IN OREGON CASCADES FORESTS OVER A SUCCESSIONAL GRADIENT |
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In a study to examine impacts of successional and disturbance history on N export from 20 headwater stream systems in the west central Cascades of Oregon, a region of low anthrop...
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CARBON AND SULFUR ACCUMULATION AND IRON MINERAL TRANSFORMATION IN PERMEABLE REACTIVE BARRIERS CONTAINING ZERO-VALENT IRON |
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Permeable reactive barrier technology is an in-situ approach for remediating groundwater contamination that combines subsurface fluid flow management with passive chemical treatm...
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CARBON BALANCE OF FOREST BIOMES IN THE FORMER USSR |
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Sources and sinks of carbon and the sequestration potential of forest biomes in the former Soviet Union (FSU) were assessed under non-equilibrium conditions by considering, 1) net ...
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CARBON BALANCE OF THE CONTINUOUS PERMAFROST ZONE OF RUSSIA |
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An increase in the atmospheric concentration of CO2 is projected to cause climate warming. arming of the permafrost environment could change the balance between carbon accumulation...
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CARBON BLACK DISPERSION PRE-PLATING TECHNOLOGY FOR PRINTED WIRE BOARD MANUFACTURING |
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This project compared chemical use, waste generation, cost, and product quality between electroless copper and carbon-black-based preplating technologies at the printed wire board ...
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CARBON BLACK DISPERSION PRE-PLATING TECHNOLOGY FOR PRINTED WIRE BOARD MANUFACTURING |
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This evaluation addresses the product quality, waste reduction, and economic issues involved in replacing electroless copper with a carbon black dispersion technology. McCurdy Circ...
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CARBON BUDGET FOR A SUB-TROPICAL SEAGRASS DOMINATED COASTAL LAGOON: HOW IMPORTANT ARE SEAGRASSES TO TOTAL ECOSYSTEM NET PRIMARY PRODUCTION? |
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Seagrasses dominate macrophyte biomass in many estuaries. Historically, it has been assumed that because of the large standing stock seagrasses also dominate primary production. ...
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CARBON BUDGET FOR BRAZIL: INFLUENCE OF FUTURE LAND-USE CHANGE |
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NO ABSTRACT PROVIDED...
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CARBON BUDGET FOR FORESTS OF THE CONTERMINOUS UNITED STATES |
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The potential need for national-level comparisons of greenhouse gas emissions, and the desirability of understanding terrestrial sources and sinks of carbon, has prompted interest ...
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CARBON BUDGET OF BRAZIL: A 1990 ASSESSMENT |
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The global carbon cycle is affected by the annual addition of 7.0 x 10 9 Mg CO2-C to the atmosphere from deforestation and burning of fossil fuels. ecause of its large area of high...
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CARBON CONTAINING COMPONENT OF THE LOS ANGELES AEROSOL: SOURCE APPORTIONMENT AND CONTRIBUTIONS TO THE VISIBILITY BUDGET |
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Source resolution of the organic component of the fine fraction of the ambient aerosol (d(sub p) < 3.5 micrometers) has been carried out by combining source information from the or...
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CARBON DIOXIDE AND OXYGEN-NITROGEN RATIOS AS FACTORS AFFECTING SALMON SURVIVAL IN AIR-SUPERSATURATED WATER |
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Juvenile sockeye salmon (Oncorhynchus nerka) were exposed to lethal levels of air-supersaturated water (120 percent, 125 percent, 130 percent total gas saturation) containing diffe...
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CARBON DIOXIDE AND WATER VAPOR EXCHANGE BY YOUNG AND OLD PONDEROSA PINE ECOSYSTEMS DURING A DROUGHT YEAR. (R826601) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON DIOXIDE FROM FOSSIL FUELS: ADAPTING TO UNCERTAINTY |
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The paper discusses the general effect and control of CO2. The world is likely to experience noticeable global warming by the beginning of the next century if high annual growth ra...
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CARBON DIOXIDE LASER SYSTEM TO MEASURE GASEOUS POLLUTANTS |
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The report concerns the continuation of work in the development of a gas laser system for air pollution monitoring over long paths, a kilometer or more, using infrared absorption. ...
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CARBON DIOXIDE SEQUESTRATION IN TERRESTRIAL ECOSYSTEMS |
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The terrestrial biosphere plays a prominent role in the global carbon (C) cycle. errestrial ecosystems are currently accumulating C and it appears feasible to manage existing terre...
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CARBON DYNAMICS OF MEXICAN TROPICAL EVERGREEN FORESTS: INFLUENCE OF FOREST MANAGEMENT OPTIONS AND REFINEMENT OF CARBON-FLUX ESTIMATES |
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Tropical evergreen forests (TEF) of southeast Mexico experienced a deforestation rate of approximately 206,000 ha/yr and an efflux of nearly 21 TgC/yr between 1980 and the present....
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CARBON DYNAMICS OF THE CONSERVATION AND WETLAND RESERVE PROGRAMS |
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Data from the Conservation (CRP) and Wetland (WRP) Reserve Programs were analyzed to quantify the carbon (C) dynamics of associated cropland converted to grassland or forestland. L...
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CARBON EMISSION TRADING COSTS AND ALLOWANCE ALLOCATIONS: EVALUATING THE OPTIONS. (R828628) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON EXCHANGE DYNAMICS AND MINERAL WEATHERING IN A TEMPERATE FORESTED WATERSHED (NORTHERN MICHIGAN): LINKS BETWEEN FOREST ECOSYSTEMS AND GROUNDWATERS (R824979) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON FIBER DATA BASE: DATA BASE REVIEW AND ASSESSMENT OF CARBON FIBER RELEASE INTO THE ENVIRONMENT |
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This study addressed the eventual disposal of carbon fiber composites in municipal waste streams. A survey of current literature presents the effects of fires on carbon fiber compo...
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CARBON FLUX AND PATTERNS OF LAND-USE/LAND-COVER CHANGE IN THE SELVA LACANDONA, MEXICO |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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CARBON IN FORESTS: QUALITY MATTERS |
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The nature of carbon in forests is discussed from the perspective of carbon sequestration and global climate change. Carbon inventories, specifically in the area of land use and fo...
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CARBON INPUTS DURING A FOUR-YEAR GLOBAL CHANGE EXPERIMENT |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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CARBON ISOTOPE DISCRIMINATION AND GROWTH RESPONSE OF OLD PINUS PONDEROSA TREES TO STAND DENSITY REDUCTIONS |
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Stand density reductions have been proposed as a method by which old-growth ponderosa pine (Pinus ponderosa) forests of North America can be converted back to pre-1900 conditions, ...
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CARBON ISOTOPE DISCRIMINATION AND GROWTH RESPONSE TO STAND DENSITY REDUCTIONS IN OLD PINUS PONDEROSA TREES |
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Carbon isotope ratios ( 13C) of tree rings are commonly used for paleoclimatic reconstruction and for inferring canopy water-use efficiency (WUE). However, the responsiveness of c...
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CARBON LOSS AND OPTICAL PROPERTY CHANGES DURING LONG-TERM PHOTOCHEMICAL AND BIOLOGICAL DEGRADATION OF ESTUARINE DISSOLVED ORGANIC MATTER |
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Terrestrially derived dissolved organic matter (DOM) impacts the optical properties of coastal seawater and affects carbon cycling on a global scale. We studied sequential long-ter...
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CARBON MONOOXIDE AND THE NERVOUS SYSTEM |
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Carbon monoxide (CO) is a colorless, tasteless, odorless, and non-irriating gas formed when carbon fuel is not burned completely. It enter the bloodstream through the lungs and at...
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CARBON MONOXIDE |
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This document summarizes the carbon monoxide literature related to effects on man and his environment for the consideration of the Environmental Protection Agency in updating the i...
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CARBON MONOXIDE AND THE NERVOUS SYSTEM |
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Carbon monoxide (CO) is a colorless, tasteless, odorless, and non-irritating gas formed when carbon in fuel is not burned completely. It enters the bloodstream through the lungs an...
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CARBON MONOXIDE AND TOTAL HYDROCARBON CONTINUOUS MONITORING AT HAZARDOUS WASTE INCINERATION FACILITIES |
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Incineration is being viewed increasingly as the most practical, least harmful means of disposing of hazardous waste. he EPA has recently proposed continuous monitoring specificati...
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CARBON MONOXIDE COMMUTER EXPOSURE DATA BASE: A 5-DAY STUDY IN LOS ANGELES |
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Recent concern about carbon monoxide exposure to the commuter population prompted the U.S. Environmental Protection Agency to conduct a five-day field project to assess the CO expo...
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CARBON MONOXIDE CONCENTRATIONS IN FOUR U.S. CITIES DURING THE WINTER OF 1981 |
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Portable monitors were used to measure time averaged personal exposures (10-30 min) to carbon monoxide. Data were collected from January through March 1981 in four cities where car...
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CARBON MONOXIDE EMISSIONS FROM ROAD DRIVING: EVIDENCE OF EMISSIONS DUE TO POWER ENRICHMENT |
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The paper examines one aspect of motor vehicle emissions behavior; i. e. emissions due to engine power enrichment, a factor not well represented in existing models. atabase reflect...
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CARBON MONOXIDE EXPOSURE AND HUMAN VISUAL DETECTION THRESHOLDS |
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In order to test for low level CO exposure effects on vision, a battery of visual tests was administered to male college students. ll subjects completed the battery of tests both b...
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CARBON MONOXIDE EXPOSURES INSIDE AN AUTOMOBILE TRAVELING ON AN URBAN ARTERIAL HIGHWAY |
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Carbon monoxide (CO) exposures were measured inside a motor vehicle during 88 standardized drives on a major urban arterial highway, El Camino Real (traffic volume of 30,500-45,000...
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CARBON MONOXIDE FLUXES OF DIFFERENT SOIL LAYERS IN UPLAND CANADIAN BOREAL FORESTS |
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Dark or low-light carbon monoxide fluxes at upland Canadian boreal forest sites were measured on-site with static chambers and with a laboratory incubation technique using cores fr...
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CARBON MONOXIDE IN THE U.S. MID-ATLANTIC TROPOSPHERE: EVIDENCE FOR A DECREASING TREND. (R826373) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON MONOXIDE NAAQS REVIEW: INTEGRATED SCIENCE ASSESSMENT |
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The Clean Air Act mandates a periodic (5-year) review of the NAAQS for various criteria pollutants, including carbon monoxide (CO). The mandated periodic updating of the Air Quali...
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CARBON MONOXIDE NETWORK DESIGN METHODOLOGY--APPLICATION IN THE LAS VEGAS VALLEY |
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An objective methodology that uses aerometric data and a physically based air quality simulation model was proposed in a previous report for the optimal siting of air pollutant mon...
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CARBON MONOXIDE POISONING--A PUBLIC HEALTH PERSPECTIVE. |
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Carbon monoxide (CO) may be the cause of more than one-half of the fatal poisonings reported in many countries: fatal cases also are grossly under-reported or mis-diagnosed by medi...
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CARBON MONOZIDE INTRUSION IN SUSTAINED-USE VEHICLES |
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Section 226 of the Clean Air Act Amendments of 1977 directed the USEPA to perform a study of carbon monoxide (CO) exposures in the passenger area of sustained use vehicles, i.e., b...
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CARBON NANOTUBE/COPPER COMPOSITE ELECTRODES FOR CAPILLARY ELECTROPHORESIS MICROCHIP DETECTION OF CARBOHYDRATES. (R830900) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON NANOTUBES IN MICROWAVE ENVIRONMENT-IGNITION AND RECONSTRUCTION |
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The unusual property of single-walled carbon nanotubes (SWNT), multi-wall (MWNT) nanotubes and Buckminsterfullerene (C-60) is observed upon exposure to microwave-assisted ignition....
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CARBON POOL AND FLUX OF GLOBAL FOREST ECOSYSTEMS |
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Forest systems cover more than 4.1 x 10 9 hectares of the Earth's land area. lobally, forest vegetation and soils contain about 1146 petagrams of carbon, with approximately 37 perc...
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CARBON POOLS AND FLUX ON FORESTED LANDS OF THE UNITED STATES |
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The potential for global climate change due to the anthropogenic release of carbon dioxide methane, and other gases has focused attention on global forests. orest ecosystems are a ...
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CARBON QUALITY AND QUANTITY AFFECT THE RETENTION AND MICROBIAL PROCESSING OF APPLIED NITROGEN |
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Excess nitrogen (N) from fertilizer or atmospheric deposition can have harmful effects on the environment and human health. Remediative methods of controlling N leaching and limit...
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CARBON REACTIVATION BY EXTERNALLY-FIRED ROTARY KILN FURNACE |
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An externally-fired rotary kiln furnace system has been evaluated for cost-effectiveness in carbon reactivation at the Pomona Advanced Wastewater Treatment Research Facility. The p...
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CARBON REGENERATION, FENTON OXIDATION AND GROUNDWATER REMEDIATION |
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A ground water treatment process is described in which contaminants are adsorbed onto granulated activated carbon (GAC) containing fixed iron oxide. Hydrogen peroxide (H2O2) is am...
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CARBON SEQUESTRATION AND LAND MANAGEMENT AT DOD INSTALLATIONS: AN EXPLORATORY STUDY |
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This report explores the influence of management practices such as tree harvesting, deforestation, and reforestation on carbon sequestration potential by DOD forests by performing ...
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CARBON SEQUESTRATION BY FORESTS IN THE UNITED STATES - CURRENT STATUS AND PROJECTIONS TO THE YEAR 2040 |
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National-level forest carbon budgets are of interest in relation to understanding the global carbon cycle, comparing anthropogenic and biogenic sources of carbon, and developing po...
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CARBON SEQUESTRATION IN SOILS AND GLOBAL CLIMATIC CHANGE |
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The storage of carbon in soils is a very complex phenomenon. lthough it is not fully characterized or understood, steps can be taken to use soils as a reservoir of carbon. he role ...
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CARBON SEQUESTRATION, BIOLOGICAL DIVERSITY, AND SUSTAINABLE DEVELOPMENT: INTEGRATED FOREST MANAGEMENT |
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Tropical deforestation provides a significant contribution to anthropogenic increases atmospheric CO2 concentration that may lead to global warming. orestation and other forest man...
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CARBON SOURCES AND SINKS IN THE FOREST BIOMES OF THE FORMER SOVIET UNION |
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Net primary productivity (NPP) of Soviet forest biomes hall been estimated from an equilibrium analysis at seven percent of the global terrestrial NPP, 20 percent of the world's to...
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CARBON STARVATION SURVIVAL GENE OF PSEUDOMONAS PUTIDA IS REGULATED BY O-54 |
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NO ABSTRACT PROVIDED...
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CARBON STORAGE AND FLUXES IN PONDEROSA PINE AT DIFFERENT SUCCESSIONAL STAGES |
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We compared carbon storage and fluxes in young and old ponderosa pine stands in Oregon, including plant and soil storage, net primary productivity, respiration fluxes, and eddy flu...
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CARBON STORAGE BENEFITS OF AGROFORESTRY SYSTEMS |
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The process of land degradation is a local phenomenon that occurs field by field but also has a global dimension because of the sheer extent at which it is taking place. groforestr...
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CARBON STORAGE IN AGROFORESTRY: AN ESTIMATE FOR SUB-SAHARAN AFRICA |
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NO ABSTRACT PROVIDED...
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CARBON STORAGE POTENTIAL OF SHORT ROTATION TROPICAL TREE PLANTATIONS |
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Forests are a major sin or car on an play an important role in the global carbon cycle. ot only do forests contain hugh amounts of carbon, they exchange it very actively with the a...
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CARBON TETRACHLORIDE METABOLISM IN PARTIALLY HEPATECTOMIZED AND SHAM OPERATED RATS PRE-EXPOSED TO CHLORDECONE (KEPONE R)1 |
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The potentiation of CCl4 toxicity by preexposure to chlordecone (CD) is well established. hlordecone-induced metabolism of C14 and suppressed hepatocellular repair have been offere...
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CARBON TETRACHLORIDE TRANSFORMATION IN A MODEL IRON-REDUCING CULTURE: RELATIVE KINETICS OF BIOTIC AND ABIOTIC REACTIONS. (R825958) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON TETRACHLORIDE-INDUCED HEPATOTOXIC RESPONSE IN RAINBOW TROUT, SALMO GAIRDNERI, AS INFLUENCED BY TWO COMMERCIAL FISH DIETS |
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Alanine aminotransferase (GPT) activity was measured in plasma and liver from rainbow trout fed two commercial fish diets....
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CARBON TRACE GASES IN LAKE AND BEAVER POND ICE NEAR THOMPSON, MANITOBA, CANADA |
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Concentrations of CO2, CO, and CH4 were measured in beaver pond and lake ice in April 1996 near Thompson, Manitoba to derive information on possible impacts of ice melting on corre...
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CARBON TRADING AND FOREST SEQUESTRATION: CAN FORESTS LIVE UP TO THE BILLING? |
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A growing number of public officials, scientists, and members of the public and private sector suggest that the effects of climate change could affect the environment and economy o...
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CARBON, CONTAMINANTS AND CREEKS: USING STABLE ISOTOPES AND PCBS TO TRACK ENERGY FLOW THROUGH STREAM FOODWEBS |
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Oral presentation at the University of Georgia Institute of Ecology, November 4, 2005....
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CARBON-13 NUCLEAR MAGNETIC RESONANCE. 13C CHEMICAL SHIFTS AND 13C-199HG COUPLING CONSTANTS FOR SOME ORGANOMERCURY COMPOUNDS |
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The (13)C shieldings and (13)C-(199)Hg coupling constants of fourteen phenyl- and seven alkyl- and alkenyl-mercury compounds have been obtained. Substituent effects on the (13)C sh...
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CARBON-CARBON BOND FORMATION VIA PALLADIUM-CATALYZED REDUCTIVE COUPLING IN AIR. (R822668) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBON-CARBON BOND FORMATIONS VIA PALLADIUM CATALYZED REDUCTIVE COUPLING OF ARYL HALIDES IN AIR AND WATER. (R828129) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CARBONATE EQUILIBRIA AND GROUNDWATER SAMPLE COLLECTION: IMPLICATIONS FOR ESTIMATED AVERAGE SUBSURFACE PROPERTIES IN CONTINENTAL NORTH AMERICA |
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The geochemistry of carbon dioxide in oxygenated groundwater may have a profound impact on analytical results obtained from efforts to measure in situ groundwater pH conditions and...
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CARBONYL SULFIDE INHALATION PRODUCES BRAIN LESIONS IN F344 RATS. |
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Carbonyl sulfide (COS) is an intermediate in the production of pesticides and herbicides, and is a metabolite of the neurotoxicant carbon disulfide. The potential neurotoxicity of ...
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CARBOXYHEMOGLOBIN AND BRAIN BLOOD FLOW IN HUMANS |
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It has been shown that with increased carboxyhemoglobin (COHb) and associated decrease in blood oxygen-carrying capacity, a compensatory increase in brain-blood flow (BBF) develops...
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CARBOXYHEMOGLOBIN FORMATION DUE TO CARBON MONOXIDE IN RATS |
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The Coburn-Forster-Kane equation (CFKE) ia a well tested model for prediction of COHb formation due to carbon monoxide (CO) exposure in humans. here have been few and relatively po...
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CARDIOVASCULAR EFFECTS OF ULTRAFINE CARBON PARTICLES IN HYPERTENSIVE RATS (SHR) |
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Rationale: Epidemiological evidence suggests that ultrafine particles are associated with adverse cardiovascular effects, specifically in elderly individuals with preexisting cardi...
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CARDIOVASCULAR RESPONSES IN UNRESTRAINED WKY-RATS TO INHALED ULTRAFINE CARBON PARTICLES |
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Abstract
This study provides evidence for adverse cardiac effects of inhaled ultrafine particles (UFPs) in healthy WKY rats. Short term exposure (24 h) with carbon UFPs (180 ?g?...
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CARDIOVASCULAR RESPONSES TO ULTRAFINE CARBON PARTICLE EXPOSURES IN RATS |
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TD-02-042 (U. KODAVANTI) GPRA # 10108
Cardiovascular Responses to Ultrafine Carbon Particle Exposures in Rats.
V. Harder1, B. Lentner1, A. Ziesenis1, E. Karg1, L. Ruprec...
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CARDIOVASCULAR TOXICITY OF PM: SOLUBLE COMPONENTS OR SOLID PARTICLES? |
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Since strong suggestion of cardiac-related deaths has arisen from epidemiological studies of ambient PM, a major effort is required to identify PM components and mechanisms respons...
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CARNOL PROCESS FOR CO2 MITIGATION FROM POWER PLANTS AND THE TRANSFORMATION SECTOR |
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The report describes an alternative mitigation process that would convert waste carbon dioxide (CO2) to carbon an methanol using natural gas as process feedstock. The process yield...
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CARRY-OVER EFFECTS OF OZONE ON ROOT GROWTH AND CARBOHYDRATE CONCENTRATIONS OF PONDEROSA PINE SEEDLINGS |
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Ozone exposure decreases belowground carbon allocation and root growth of plants;however,the extent to which these effects persist and the cumulative impact of ozone stress on plan...
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CASE STUDIES OF HAZARDOUS WASTE TREATMENT TO REMOVE VOLATILE ORGANICS. VOLUME 1 |
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Case studies are presented for treatment of refinery wastes in a pilot-scale thin-film evaporator, the removal of volatiles from industrial wastewater for two steam strippers, and ...
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CASE STUDIES OF HAZARDOUS WASTE TREATMENT TO REMOVE VOLATILE ORGANICS. VOLUME 2 |
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Case studies are presented in the report for treatment of refinery wastes in a pilot-scale thin-film evaporator, the removal of volatiles from industrial wastewater for two steam s...
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CATALYST EVALUATION FOR DENITROGENATION OF PETROLEUM RESIDUA AND COAL LIQUIDS |
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The report covers the final phase of a study of catalysts for demetallization of heavy residual oils and for denitrogenation. Objectives were to evaluate some commercial catalysts ...
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CATALYTIC CONVERSION OF HAZARDOUS AND TOXIC CHEMICALS: CATALYTIC HYDRODECHLORINATION OF POLYCHLORINATED PESTICIDES AND RELATED SUBSTANCES |
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A study has been undertaken of the catalytic conversion of chlorinated pesticides and other environmentally undesirable chlorinated materials into acceptable compounds. The results...
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CATALYTIC EFFECTS OF CARBON SORBENTS FOR MERCURY CAPTURE. (R827649C001) |
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Activated carbon sorbents have the potential to be an effective means of mercury control in combustion systems. Reactions of activated carbons in flow systems with mercury and g...
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CATALYTIC HYDRODECHLORINATION OF POLYCHLORINATED PESTICIDES AND RELATED SUBSTANCES: AN EXECUTIVE SUMMARY |
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A study was undertaken of the catalytic conversion of chlorinated pesticides and other undesirable chlorinated compounds to acceptable compounds. This study shows that chlorine can...
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CATALYTIC HYDRODEHALOGENATION OF CHLORINATED ETHYLENES USING PALLADIUM AND HYDROGEN FOR THE TREATMENT OF CONTAMINATED WATER. (R825689C054,R825689C060) |
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AbstractA kinetic model is presented for the catalytic hydrodehalogenation of chlorinated ethylenes using Pd and H2 under water treatment conditions. All fiv...
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CATALYTIC OXIDATION OF 1,1-DICHLOREOTHANE |
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The paper gives results of an investigation of the catalyic oxidation of 1,1-dichloroethane over a commercial Cr203/Al2O3 catalyst at 500 ppm and 30-500 C. inyl chloride was observ...
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CATALYTIC OXIDATION OF 1,1-DICHLOROETHANE |
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The paper gives results of an investigation of the catalytic oxidation of 1,1-dichloroethane over a commercial Cr2O3/A12O3 catalyst at 500 ppm and 30-500 C. inyl chloride was obser...
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CATALYTIC OXIDATION OF ALCOHOLS AND EPOXIDATION OF OLEFINS WITH HYDROGEN PEROXIDE AS OXIDANT |
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Hydrogen peroxide (H2O2) is an ideal oxidant of choice for these oxidations due to economic and environmental reasons by giving water as a by-product. Two catalysts used are vanadi...
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CATALYTIC OXIDATION OF GROUNDWATER STRIPPING EMISSIONS |
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The paper reviews the applicability of catalytic oxidation to control ground-water air stripping gaseous effluents, with special attention to system designs and case histories. The...
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CATALYTIC OXIDATION OF MALODOROUS COMPOUNDS FROM PULP AND PAPER MILLS WITH OZONE AS AN OXIDANT |
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Total reduced sulfer (TRS) compounds such as dimethyl sulfide, dimethyl disulfide, methanethiol and H2S are identified as major constituents of pulp and paper mill blow tank efflue...
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CATALYTIC STEAM REFORMING OF CHLOROCARBONS: CATALYST COMPARISONS. (R822721C633) |
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Catalyst candidates for steam reforming chlorocarbons have been screened for activity using methyl chloride as a model reactant. At 500°C, a H2O/C ratio of about ...
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CATALYTIC STEAM REFORMING OF CHLOROCARBONS: CATALYST COMPARISONS. (R826694C633) |
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Catalyst candidates for steam reforming chlorocarbons have been screened for activity using methyl chloride as a model reactant. At 500°C, a H2O/C ratio of about...
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CATALYTIC STEAM REFORMING OF CHLOROCARBONS: CATALYST DEACTIVATION. (R826694C633) |
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Deactivation of 0.5 wt.% Pt/ -Al2O3 catalysts du...
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CATALYTIC STEAM REFORMING OF CHLOROCARBONS: METHLYCHLORIDE. (R822721C633) |
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The effective destruction of trichloroethane, trichloroethylene and perchloroethylene by steam reforming with a commercial nickel catalyst has been demonstrated. Conversion leve...
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CATALYTIC STEAM REFORMING OF CHLOROCARBONS: POLYCHLORINATED BIPHENYLS (PCBS). (R826694C633) |
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Experiments with commercial askarals (Aroclors 1221, 1248 and 1254) have confirmed the feasibility of catalytic steam reforming as a method for destroying polychlorinated biphen...
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CATALYTIC STEAM REFORMING OF CHLOROCARBONS: TRICHLOROETHANE, TRICHLOROETHYLENE AND PERCHLOROETHYLENE. (R826694C633) |
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The effective destruction of trichloroethane, trichloroethylene and perchloroethylene by steam reforming with a commercial nickel catalyst has been demonstrated. Conversion leve...
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CATALYTIC TREATMENT OF AIR STRIPPING EFFLUENTS |
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The paper reviews the applicability of catalytic oxidation to control ground-water air stripping gaseous effluents with emphasis on system designs and case histories. The contamina...
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CATIONIC DISPERSION POLYMERIZATIONS IN LIQUID CARBON DIOXIDE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CAV-OX CAVITATION OXIDIATION PROCESS - MAGNUM WATER TECHNOLOGY, INC. - APPLICATIONS ANALYSIS REPORT |
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This report evaluates the ability of the CAV-OX cavitation oxidation process to remove volatile organic compounds (VOC) present in aqueous wastes. This report also presents economi...
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CENTRAL CAROLINA VEHICLE PARTICULATE EMISSION STUDY (FINAL REPORT) |
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A study to characterize the exhaust emissions from a light-duty fleet of in-use vehicles representative of central North Carolina was conducted in 1999 during both a winter phase...
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CHALLENGES OF PROCESSING BIOLOGICAL DATA FOR INCORPORATION INTO A LAKE EUTROPHICATION MODEL |
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A eutrophication model is in development as part of the Lake Michigan Mass Balance Project (LMMBP). Successful development and calibration of this model required the processing and...
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CHANGES IN BIOCHEMICAL COMPOSITION DURING LARVAL AND EARLY POSTLARVAL DEVELOPMENT OF LEPIDOPHTHALMUS LOUISIANENSIS, A GHOST SHRIMP WITH ABBREVIATED DEVELOPMENT. |
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Larvae of the ghost shrimp, Lepidophthalmus louisianensis, were mass-reared under laboratory conditions (28|C; 20o/ooS) from hatching to the decapodid (D) stage. Iatroscan lipid cl...
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CHANGES IN CARBON STORAGE AND FLUXES IN A CHRONOSEQUENCE OF PONDEROSA PINE. (R828309) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CHANGES IN CHLOROPHYLL A FLOURESCENCE AND PIGMENT RATIOS DURING DIFFERENT GROWTH PHASES OF A UNICELLULAR MARINE CHAETOCEROS (BACILLAROPHYCEAE) IN BATCH CULTURE |
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Interpretations of chlorophyll a fluorescence data are based largely on application with green algae and higher plants. This study evaluated the interpretation of fluorescence data...
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CHANGING CLIMATE AND PHOTOBIOGEOCHEMICAL CYCLES IN AQUATIC ENVIRONMENTS |
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Global biogeochemistry plays a critical role in controlling life processes, climate and their interactions, including effects on atmospheric greenhouse gas concentrations. Recent e...
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CHAPTER 17 DISCUSSION: EXERCISE AND THE ENVIRONMENT |
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This chapter elaborates on two areas briefly discussed by Dr. Sutton: he effect of our air environment on fitness and human health, specifically the effects on the lungs; and the t...
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CHAPTER 17: VIVANTARY RESPONSIBLITY AND EMERGY ACCOUNTING |
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Ecosystem processes represented by manifold material cycles and energy flows are a necessary condition of life on Earth. Though our species is embedded in a matrix of ecosystem pr...
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CHARACTERISTICS OF BACTERIA ADAPTED TO LOW NUTRIENT CONDITIONS IN LAKE ONTARIO |
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The fate of organic pollutants in aquatic ecosystems depends, in part, on metabolic activities of the indigenous microflora. Knowledge is therefore needed for the growth characteri...
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CHARACTERISTICS OF MERCURY DESORPTION FROM SORBENTS AT ELEVATED TEMPERATURES. (R822721C697) |
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This study investigated the dynamic desorption characteristics of mercury during the thermal treatment of mercury-loaded sorbents at elevated temperatures under fixed-bed operat...
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CHARACTERISTICS OF MERCURY DESORPTION FROM SORBENTS AT ELEVATED TEMPERATURES. (R826694C697) |
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This study investigated the dynamic desorption characteristics of mercury during the thermal treatment of mercury-loaded sorbents at elevated temperatures under fixed-bed operat...
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CHARACTERISTICS OF NONPOINT SOURCE URBAN RUNOFF AND ITS EFFECTS ON STREAM ECOSYSTEMS |
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Literature on urban nonpoint source runoff was surveyed to determine the magnitude of the effects of that source of contaminants to stream ecosystems. Ecological literature provide...
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CHARACTERISTICS OF ORGANIC EMISSIONS FROM HAZARDOUS WASTE INCINERATION PROCESSES UNDER THE NEW EPA DRAFT RISK BURN GUIDANCE: MEASUREMENT ISSUES |
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EPA's recently published draft Risk Burn Guidance recommends that hazardous waste combustion facilities complete a mass balance of the total organics (TOs) that may be emitted from...
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CHARACTERIZATION AND TREATMENT OF AQUEOUS WASTES AND RESIDUE FROM PETROLEUM REFINERIES |
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This research project was designed to identify process wastewaters which contained a significant proportion of the total load of contaminants in petroleum refinery wastewaters and ...
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CHARACTERIZATION OF ACTIVATED CARBONS' PHYSICAL AND CHEMICAL PROPERTIES IN RELATION TO THEIR MERCURY ADSORPTION |
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The paper gives results of a characterization of the physical and chemical properties of the activated carbons used for elemental mercury (Hgo) adsorption, in order to understand t...
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CHARACTERIZATION OF ACTIVATED CARBONS' PHYSICAL AND CHEMICAL PROPERTIES IN RELATION TO THEIR MERCURY ADSORPTION: SYMPOSIUM/CONFERENCE |
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SYMPOS/CONF NRMRL-RTP-P-597 Li*, Y.H., Lee*, C.W., and Gullett*, B.K. Characterization of Activated Carbons' Physical and Chemical Properties in Relation to their Mercury Adsorpti...
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CHARACTERIZATION OF AGROSTIS SPP. HABITAT IN CENTRAL OREGON |
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Creeping bentgrass, Agrostis stolonifera L., is a non-native grass commonly found at mesic sites in central Oregon. Interest in A. stolonifera plant communities and ...
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CHARACTERIZATION OF AIR EMISSIONS FROM THE SIMULATED OPEN COMBUSTION OF FIBERGLASS MATERIALS |
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The report identifies and quantifies a broad range of pollutants that are discharged during small-scale, simulated, open combustion of fiberglass, and reports these emissions relat...
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CHARACTERIZATION OF ANAEROBIC DECHLORINATING CONSORTIA DERIVED FROM AQUATIC SEDIMENTS |
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Four methanogenic consortia, which degraded 2-chlorophenol, 3-chlorophenol, 2-chlorobenzoate, and 3-chlorobenzoate, respectively; and one nitrate-reducing consortium which degraded...
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CHARACTERIZATION OF CARBON DISULFIDE NEUROTOXICITY IN C57BL6 MICE: BEHAVIORAL, MORPHOLOGIC AND MOLECULAR EFFECTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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CHARACTERIZATION OF CARBON FIBER EMISSIONS FROM CURRENT AND PROJECTED ACTIVITIES FOR THE MANUFACTURE AND DISPOSAL OF CARBON FIBER PRODUCTS |
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Composite materials formed by impregnating a carbon or graphite fiber mat with plastic binders are being used increasingly in military, aerospace, sports and automotive application...
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CHARACTERIZATION OF EMISSIONS FROM A METHANOL FUELED VEHICLE |
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Exhaust, evaporative, and refueling emissions were examined from a methanol fueled Ford Escort operated with M-85 (85% methanol - 15% gasoline) and M-l00 (100% methanol) fuels. xha...
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CHARACTERIZATION OF EMISSIONS FROM A VARIABLE GASOLINE/METHANOL FUELED CAR |
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In response to the occurrence of the increasingly severe ambient ozone exceedances, regional environmental managers are examining the possibility of a cleaner fuel for automobiles....
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CHARACTERIZATION OF EMISSIONS FROM ADVANCED AUTOMOTIVE POWER PLANT CONCEPTS |
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Emissions from three diesel cars using two fuel formulations were assessed. The three diesel cars included a prototype naturally-aspirated Fiat 131, a prototype turbocharged Fiat 1...
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CHARACTERIZATION OF EMISSIONS FROM AN EARLY MODEL FFV |
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An emission study was conducted on a 1987 Ford Crown Victoria flexible-fuel vehicle, an early prototype which had been driven about 25,000 miles. he vehicle was designed to run on ...
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CHARACTERIZATION OF EMISSIONS FROM AN EARLY MODEL FLEXIBLE-FUEL VEHICLE |
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An emission study was conducted on a 1987 Ford Crown Victoria flexible-fuel vehicle, an early prototype which had been driven about 25,000 miles. he vehicle was designed to run on ...
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CHARACTERIZATION OF EMISSIONS FROM BURNING INCENSE |
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The primary objective of this study was to improve the characterization of particulate matter emissions from burning incense. Emissions of particulate matter were measured for 23 d...
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CHARACTERIZATION OF EMISSIONS FROM HAND-HELD TWO-STROKE ENGINES |
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Despite their extremely high organic and particulate matter emission rates, two-stroke engines remain among the least studied of engine types. Such studies are rare because they...
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CHARACTERIZATION OF EMISSIONS FROM MALFUNCTIONING VEHICLES FUELED WITH OXYGENATED GASOLINE-ETHANOL (E-10) FUEL - PART III |
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Five vehicles (a 1987 Ford Taurus, a 1996 Chrysler Concord, a 2001 Ford Focus, a 1993 Buick Regal, and a 2001 Dodge Intrepid) were tested using three different fuels: (1) winter g...
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CHARACTERIZATION OF EMISSIONS FROM MALFUNCTIONING VEHICLES FUELED WITH OXYGENATED GASOLINE-ETHANOL (E-10) FUEL-PART II |
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A 1993 Ford Taurus and a 1995 Chevrolet Achieva were tested using three different fuels: (1) a winter grade (E-10) fuel containing 10% (vol.) 200 proof ethanol, (2) a winter grad...
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CHARACTERIZATION OF EMISSIONS FROM MOTOR VEHICLES DESIGNED FOR LOW N0X EMISSIONS |
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Tailpipe emissions were characterized for four advanced low NOx catalyst equipped passenger cars under a variety of cyclic driving conditions. All of the vehicles had three-way cat...
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CHARACTERIZATION OF EMISSIONS FROM THE SIMULATED OPEN-BURNING OF NON-METALLIC AUTOMOBILE SHREDDER RESIDUE |
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The report gives results of a study in which the open combustion of a nonmetallic waste product called "fluff" was simulated and the resulting emissions collected and characterized...
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CHARACTERIZATION OF EMISSIONS OF PAH'S (POLYNUCLEAR AROMATIC HYDROCARBON) FROM RESIDENTIAL COAL-FIRED SPACE HEATERS |
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The paper gives results of a joint emissions testing and analysis program--the U.S. EPA and the State of Vermont--to determine polynuclear aromatic hydrocarbon (PAH), particulate, ...
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CHARACTERIZATION OF ENVIRONMENTAL TOBACCO SMOKE |
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Environmental tobacco smoke (ETS) has been analyzed with respect to several components following smoking of research cigarettes in an experimental chamber. arameters analyzed and t...
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CHARACTERIZATION OF EXHAUST EMISSIONS FROM A DUAL CATALYST EQUIPPED VEHICLE |
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A test program was initiated to characterize exhaust gas emissions from an automobile equipped with a dual catalyst system. The dual catalyst system was designed by Gould, Inc. to ...
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CHARACTERIZATION OF FINE PARTICULATE MATTER PRODUCED BY COMBUSTION OF RESIDUAL FUEL OIL |
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Combustion experiments were carried out on four different residual fuel oils in a 732-kW boiler. PM emission samples were separated aerodynamically by a cyclone into fractions that...
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CHARACTERIZATION OF GROUNDWATER SAMPLES FROM SUPERFUND SITES BY AS CHROMATOGRAPHY/MASS SPECTROMETRY AND LIQUID CHROMATOGRAPHY/MASS SPECTROMETRY. |
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Groundwater at or near Superfund sites often contains much organic matter,as indicated by total organic carbon (TOC) measurements. Analyses by standard GC and GC/MS methodology oft...
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CHARACTERIZATION OF INDOOR AND OUTDOOR AIR POLLUTION EXPOSURES AND SOURCES |
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Human exposures to indoor and outdoor pollutants vary depending on the sources and concentrations of pollutants as well as human behavioral factors that determine the extent of an ...
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CHARACTERIZATION OF INDOOR AND OUTDOOR AIR POLLUTION EXPOSURES AND SOURCES |
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Human exposures to indoor and outdoor pollutants vary depending on the sources and concentrations of pollutants as well as human behavioral factors that determine the extent of an ...
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CHARACTERIZATION OF ISOPRENE AND OXYGENATED VOLATILE ORGANIC CARBON COMPOUNDS AT RURAL, FORESTED SITES. (R825261) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CHARACTERIZATION OF KEROSENE HEATER EMISSIONS INSIDE TWO MOBILEHOMES |
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In an effort to determine the impact of kerosene heater emissionson indoor air quality, measurements were made in and around twomobile homes at a rural mobile home park near Apex, ...
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CHARACTERIZATION OF METALS IN RUNOFF FROM RESIDENTIAL AND HIGHWAY STORM SEWERS |
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Stormwater runoff was sampled from six storm sewer outfalls in residential and highway settings in Monmouth County, NJ to determine the colloidal and dissolved metal concentrations...
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CHARACTERIZATION OF MICROSATELLITE LOCI IN SCHOENOPLECTUS AMERICANUS (CYPERACEAE) |
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Schoenoplectus americanus is a model organism for studying ecological and ecosystem responses of salt marsh plant communities to global climate change. Here we characterize 16 mic...
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CHARACTERIZATION OF ORGANIC EMISSIONS FROM HAZARDOUS WASTE INCINERATION PROCESSES UNDER THE NEW EPA DRAFT RISK BURN GUIDANCE: MEASUREMENT ISSUES |
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The paper discusses measurement issues relating to the characterization of organic emissions from hazardous waste incineration processes under EPA's new risk burn guidance. The rec...
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CHARACTERIZATION OF PARTICULATE EMISSIONS FROM CONTROLLED CONSTRUCTION ACTIVITIES: MUD/DIRT CARRYOUT |
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The report describes a field study of PM-2.5 and PM-10 (particulate matter with aerodynamic diameter less than 2.5 and 10 micrometers, respectively) emissions from a public paved r...
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CHARACTERIZATION OF REUSABLE MUNICIPAL WASTEWATER EFFLUENTS AND CONCENTRATION OF ORGANIC CONSTITUENTS |
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The main thrust of this project was to collect organic concentrates from operating advanced wastewater treatment (AWT) plants for use in health effects testing. A reverse osmosis p...
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CHARACTERIZATION OF THE FINE PARTICLE AND GASEOUS EMISSIONS DURING SCHOOL BUS IDLING |
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The particulate matter (PM) and gaseous emissions from six diesel school buses were determined over a simulated idling period typical of schools in the northeastern U.S. Testing wa...
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CHARACTERIZING THE ABIOTIC REDUCTANTS FOR NITROAROMATIC COMPOUNDS AS A FUNCTION OF REDOX ZONATION IN ANOXIC SEDIMENTS |
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Reductive transformation is the dominant reaction pathway for the degradation of nitroaromatic compounds in anaerobic environments (Larson and Weber, 1994). Proposed reductants cov...
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CHARGED DROPLET SCRUBBER FOR FINE PARTICLE CONTROL: PILOT DEMONSTRATION |
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The report gives results of a successful Charged Droplet Scrubber (CDS) pilot demonstration of coke oven emissions control. It also describes the design, installation, and checkout...
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CHEMICAL ANALYSIS METHODS FOR ATMOSPHERIC AEROSOL COMPONENTS |
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This chapter surveys the analytical techniques used to determine the concentrations of aerosol mass and its chemical components. The techniques surveyed include mass, major ions...
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CHEMICAL ANALYSIS OF WORLD TRADE CENTER FINE PARTICULATE MATTER FOR USE IN TOXICOLOGICAL ASSESSMENT |
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Chemical Analysis of World Trade Center Fine Particulate Matter for Use in Toxicological Assessment
John K. McGee1, Lung Chi Chen2, Mitchell D. Cohen2, Glen R. Chee2, Colette M...
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CHEMICAL AND BIOLOGICAL CHARACTERIZATION OF PRODUCTS OF INCOMPLETE COMBUSTION FROM THE SIMULATED FIELD BURNING OF AGRICULTURAL PLASTIC |
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The article describes chemical and biological analyses performed to characterize products of incomplete combustion emitted during the simulated open field burning of agricultural p...
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CHEMICAL AND BIOLOGICAL STATUS OF LAKES AND STREAMS IN THE UPPER MIDWEST: ASSESSMENT OF ACIDIC DEPOSITION EFFECTS |
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Many lakes in three areas in the Upper Midwest--northeastern Minnesota, northern Wisconsin, and the Upper Peninsula of Michigan--have low acid neutralizing capacity (ANC) and may b...
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CHEMICAL AND PHYSICAL CHARACTERISTICS OF LAKES OF THE SOUTHEASTERN UNITED STATES (JOURNAL VERSION) |
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A survey of the chemical status of 252 lakes, representing an estimated 2424 lakes, was conducted in the Southern Blue Ridge province and in Florida during Fall 1984. The survey wa...
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CHEMICAL AND PHYSICAL EFFECTS OF MUNICIPAL LANDFILLS ON UNDERLYING SOILS AND GROUNDWATER |
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Three municipal landfill sites in the eastern and central United States were studied to determine the effects of the disposal facilities on surrounding soils and groundwater. Borin...
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CHEMICAL AND PHYSICAL PROPERTIES OF EMISSIONS FROM KUWAITI OIL FIRES |
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After the Iraqi retreat from Kuwait in 1991, airborne sampling was conducted in the oil fire plumes near Kuwait City and ground-level samples were taken of the air within the city....
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CHEMICAL CHARACTERISTICS AND TEMPORAL TRENDS IN EIGHT STREAMS OF THE CATSKILL MOUNTAINS, NEW YORK |
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Discharge-concentration relations in eight streams studied by the U.S. Geological Survey as part of the U.S. EPA Long-Term Monitoring Project (1983 - 1989) indicate acidification o...
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CHEMICAL CHARACTERIZATION OF AMBIENT PARTICULATE MATTER NEAR THE WORLD TRADE CENTER: ELEMENTAL CARBON, ORGANIC CARBON, AND MASS RECONSTRUCTION |
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Concentrations of elemental carbon (EC), organic carbon matter (OM), particulate matter less than 2.5 um (PM2.5), and reconstructed soil, trace element oxides, and sulfate are repo...
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CHEMICAL DYNAMICS OF HYDROPHOBIC ORGANIC CONTAMINANTS DURING RESUSPENSION |
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Laboratory experiments were designed to study the chemical-particle dynamics of toxic hydrophobic organics during resuspension episodes using a particle entrainment simulator (PES)...
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CHEMICAL ELEMENT BALANCE ANALYSIS OF DENVER AEROSOL |
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Particulate samples, collected on Teflon filters by dichotomous samplers in Denver, Colorado, for 12 months during 1979, were analyzed for mass by beta radiation attenuation and fo...
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CHEMICAL EVALUATION AND TOXICOLOGICAL TESTING OF CONCENTRATED DISINFECTED WATERS |
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Raw water pumped from the Mississippi River was clarified and fluoridated. A portion was taken through a high pressure and filter and split into five parallel streams at a pilot sc...
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CHEMICAL INDUCTION OF TUMORS IN OYSTERS BY A MIXTURE OF AROMATIC AND CHLORINATED HYDROCARBONS, AMINES, AND METALS |
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Tumors were induced in eastern oysters (Crassotrea virginica) by a mixture f aromatic hydrocarbons, an aromatic amine, polychlori-nated biphenyls, chlorinated hydrocarbons, a nitro...
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CHEMICAL INTERACTIONS AMONG CHLOROHYDROCARBON MIXTURES FOUND IN WASTEWATER EFFLUENTS |
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Various chlorohydrocarbons found in industrial waste effluents, including chloroform (CHC13) and carbon tetrachloride (CCl4), can eventually contaminate public drinking water suppl...
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CHEMICAL PRODUCTS AND TOXICOLOGIC EFFECTS OF DISINFECTION |
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Four disinfectants commonly used in U.S. water treatment--chlorine, monochloramine, chlorine dioxide, and ozone--were applied to four parallel streams in a pilot plant in Jefferson...
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CHEMICAL REACTIONS AND TRANSPORT OF ALKANES AND THEIR PRODUCTS IN THE TROPOSPHERE |
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The product distributions have been calculated the more abundant alkanes contributing most of the carbon atoms in the alkane fraction of an ambient air hydrocarbon mixture reasonab...
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CHEMICAL REACTIONS OF AQUATIC HUMIC MATERIALS WITH SELECTED OXIDANTS |
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A study was conducted to identify the specific organic reaction products of natural aquatic humic materials with selected oxidants (KMnO4, HOCl, Cl02, O3 and monochloramine). React...
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CHEMICAL RECLAMATION OF SCRAP RUBBER |
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A conceptual, commercial-scale plant design was formulated for processing 22,500 t/yr of scrap rubber tires to hydrocarbon fuel gases, oils, petrochemicals (principally ethylene an...
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CHEMICAL REMOVAL OF BIOMASS FROM WASTE AIR BIOTRICKLING FILTERS: SCREENING CHEMICALS OF POTENTIAL INTEREST. (R825392) |
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A protocol was developed to rapidly assess the efficiency of chemical washing for the removal of excess biomass from biotrickling filters for waste air treatment. Although the expe...
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CHEMICAL SYNTHESES AND TRANSFORMATIONS UNDER NON-TRADITIONAL CONDITIONS |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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CHEMICAL SYNTHESIS USING 'GREENER' ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The chemical research during the last decade has witnessed a paradigm shift towards "environmentally-friendly chemistry" more popularly known as "green chemistry" due to the increa...
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CHEMICAL TRANSPORT FACILITATED BY COLLOIDAL-SIZED ORGANIC MOLECULES |
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The fluid passing through the pores of soils and geologic materials is not just water with dissolved inorganic chemicals, but a complex mixture of organic and inorganic molecules. ...
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CHEMICAL- AND SEDIMENT-MEDIATED REDUCTION OF THE AZO DYE DISPERSE BLUE 79 |
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Disperse Blue 79, a large volume disperse azo dye, and 2-bromo-4,6-dinitroaniline (BDNA), an important intermediate in the preparation of Disperse Blue 79, were readily reduced che...
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CHEMICAL-SPECIFIC PARAMETERS FOR TOXICITY CHARACTERISTIC CONTAMINANTS |
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Acid, base, and neutral hydrolysis rate constants and partition coefficients are given for 44 toxicity characteristic contaminants. Both calculated and laboratory-determined octano...
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CHEMICALLY ACTIVE FLUID-BED PROCESS FOR SULPHUR REMOVAL DURING GASIFICATION OF HEAVY FUEL OIL - FOURTH PHASE |
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The report gives results of Phase 4 of a study on the CAFB process for gasification/desulfurization of liquid and solid fuels in a bed of hot lime. A new pilot unit was designed an...
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CHEMISTRY OF ALUMINUM IN AN ACIDIC LAKE IN THE ADIRONDACK REGION OF NEW YORK STATE, USA |
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Elevated levels of aluminum in acidic surface waters have been attributed to the dissolution of soil minerals by acidic atmospheric deposition. There is currently considerable inte...
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CHEMISTRY OF DISSOLVED ORGANIC CARBON AND ORGANIC ACIDS IN TWO STREAMS DRAINING FORESTED WATERSHEDS |
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The concentration, major fractions, and contribution of dissolved organic carbon (DOG) to stream chemistry were examined in two paired streams draining upland catchments in eastern...
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CHEMISTRY OF DISSOLVED ORGANIC CARBON AT BEAR BROOK WATERSHED, MAINE: STREAM WATER RESPONSE TO (NH4)2SO4 ADDITIONS. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CHEMISTRY OF FOG WATERS IN CALIFORNIA'S CENTRAL VALLEY - PART 3: CONCENTRATIONS AND SPECIATION OF ORGANIC AND INORGANIC NITROGEN. (R825433) |
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Although organic nitrogen (ON) has been found to be a ubiquitous and significant component in wet and dry deposition, almost nothing is known about its concentration or composit...
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CHEMISTRY OF WILDERNESS LAKES IN THE WESTERN UNITED STATES |
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A synopic survey of 719 lakes representing over 10,000 lakes in mountainous areas of the western U.S. was conducted in autumn 1985. Nearly two-thirds of the study lakes were locate...
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CHLORINE DISINFECTION OF BLENDED WASTEWATER EFFLUENTS |
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During wet weather events collected water can exceed the capacity of a wastewater treatment plant (WWTP) and alternate flow management techniques must be employed. One technique i...
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CHLORINE DISINFECTION OF BLENDED WASTEWATER EFFLUENTS I |
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During wet weather events collected water can exceed the capacity of a wastewater treatment plant (WWTP) and alternate flow management techniques must be employed. One technique i...
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CHLORINE MINIMIZATION/OPTIMIZATION FOR CONDENSOR BIOFOULING CONTROL. PHASES I AND II |
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The report summarizes results of a chlorine minimization/optimization study for the control of biofouling on the surface of condenser tubes at TVA's John Sevier Plant from December...
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CHROMATOGRAPHIC METHODS FOR ANALYSIS OF ETHYLENE OXIDE IN EMISSIONS FROM STATIONARY SOURCES |
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Chromatographic methods of analysis with FID detection were investigated for quantitation of ethylene oxide in emissions from production-plants and commercial sterilizers. olumn wi...
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CHROMIUM ELECTROANALYSIS AT SCREEN PRINTED ELECTRODE MODIFIED BY THIN FILMS OF NICKEL |
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A rapid and potentially cost-effective electrochemical method is reported for analysis of chromium (VI) and Chromium(III) using a nickel modified screen printed carbon ink ele...
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CLAY MINERALS AND THE ACCUMULATION OF SOIL ORGANIC MATTER IN NORTHWESTERN U.S. FORESTS |
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Globally soils are an important terrestrial reservoir of carbon, storing approximately 3 times the carbon held in vegetation and 2 times the amount contained in the atmosphere. Wi...
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CLEAN COAL TECHNOLOGY: AN ENVIRONMENTAL PERSPECTIVE |
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Although the paper focuses on past (since 1920) and current coal use and pollutant emissions in the U.S., it also discusses where the U.S. may be going in terms of pollutant emissi...
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CLIMATE CHANGE AND TERRESTRIAL BIOMASS: WHAT IF TREES DO NOT MIGRATE? |
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Climate changes induced by doubling atmospheric greenhouse gas (2XGHG) concentrations are expected to affect the distribution of global vegetation and thereby, the amount of carbon...
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CLIMATE CHANGE IMPACTS OF NET PRIMARY PRODUCTION IN CHINA |
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Several studies have estimated the potential effects of greenhouse gas-induced climate change on various systems using outputs of general circulation models (GCMs). he purpose of t...
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CLIMATE CHANGE MODELS AND FOREST IMPACTS RESEARCH |
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The recent Earth Summit in Rio has once again focused world attention on the importance of climate, human and biological interactions. nder programs such as the Forest Service Glob...
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CLIMATE WARMING AND THE CARBON CYCLE IN THE PERMAFROST ZONE OF THE FORMER SOVIET UNION |
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The continuous permafrost zone of the former Soviet Union occupies 5% of the land surface area of the earth and stores a significant amount of carbon. limate warming could disrupt ...
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CLIMATIC CLASSIFICATION AND FUTURE GLOBAL REDISTRIBUTION OF AGRICULTURAL LAND |
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Future global carbon cycle dynamics under climates altered by increased concentrations of greenhouse gases (GHGS) will be defined in part by processes which control terrestrial bio...
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CLIMATIC EFFECTS ON TUNDRA CARBON STORAGE INFERRED FROM EXPERIMENTAL DATA AND A MODEL |
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We used a process-based model of ecosystem carbon (C) and nitrogen (N)dynamics, MBL-GEM (Marine Biological Laboratory General Ecosystem Model), to integrated and analyze the result...
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CLONING AND EXPRESSION IN ESCHERICHIA COLI OF PSEUDOMONAS STRAIN LB400 GENES ENCODING POLYCHLORINATED BIPHENYL DEGRADATION |
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Pseudomonas strain LB400 is able to degrade an unusually wide variety of polychlorinated biphenyls (PCBs). enomic library of LB400 was constructed by using the broad-host-range cos...
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CO-GASIFICATION OF DENSIFIED SLUDGE AND SOLID WASTE IN A DOWNDRAFT GASIFIER |
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Thermal gasification, the subject of this report, is a new process for the co-disposal of densified sewage sludge and solid waste in a co-current flow, fixed bed reactor (also call...
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CO2 AND N-FERTILIZATION EFFECTS ON FINE ROOT LENGTH, PRODUCTION, AND MORTALITY: A 4-YEAR PONDEROSA PINE STUDY |
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We conducted a 4-year study of Pinus ponderosa fine root (<2 mm) responses to atmospheric CO2 and N-fertilization. Seedlings were grown in open-top chambers at 3 CO2 levels (ambien...
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CO2 AND O3 ALTER PHOTOSYNTHESIS AND WATER VAPOR EXCHANGE FOR PINUS PONDEROSA NEEDLES |
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1. Effects of CO2 and O3 were determined for a key component of ecosystem carbon and water cycling: needle gas exchange (photosynthesis, conductance, transpiration and water use ef...
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COAGULATION |
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This chapter reports on the efforts of the USEPA to study conventional and enhanced coagulation for the control of disinfection by-products (DBPs) in drinking water. It examines th...
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COBALT-59 NUCLEAR MAGNETIC RESONANCE STUDIES OF CHLORO-, BROMO, AND IODO-SUBSTITUTED TRIS(ACETYLACETONATO) COBALT(III) COMPLEXES |
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The cobalt-59 nuclear magnetic resonance spectra and longitudinal relaxation times have been studied for tria(acetylacetonato)cobalt(lll) complexes with chloride, bromide, and iodi...
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COLBALT-MEDIATED ACTIVATION OF PEROXYMONOSULFATE AND SULFATE RADICAL ATTACK ON PHENOLIC COMPOUNDS, IMPLICATIONS OF CHLORIDE IONS |
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This study reports on the sulfate radical pathway of room temperature degradation of two phenolic compounds in water. The radicals were produced by the cobalt-mediated decompositio...
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COLD REGIONS AIR POLLUTION: BIBLIOGRAPHY AND SUMMARY |
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Through a series of workshops on cold climate environmental research priorities, conducted in 1982 by Battelle for the Environmental Protection Agency and the Department of Energy,...
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COLLABORATIVE TESTING OF EOA METHOD 106 (VINYL CHLORIDE) THAT WILL PROVIDE FOR A STANDARDIZED STATIONARY SOURCE EMISSION MEASUREMENT METHOD |
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Method 106 - Determination of Vinyl Chloride from Stationary Sources was evaluated in a two-part collaborative test. Gaseous samples, prepared in cylinders and containing interfere...
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COLLECTION AND TREATMENT OF WASTEWATER GENERATED BY PESTICIDE APPLICATORS |
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Methods for control of pesticide contaminated wastewater were studied. Evaluation of practices that are currently used to handle pesticide contaminated wastewaters was followed by ...
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COLLECTION OF DESIGN DATA: SITE CHARACTERIZATION FOR PERMEABLE REACTIVE BARRIERS |
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Permeable reactive barriers (PRBs) for the restoration of contaminated ground water are no longer innovative. PRBs have evolved from innovative to accepted, standard practice, for...
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COMBINED SEWER OVERFLOW ABATEMENT PROGRAM, ROCHESTER, NY. VOLUME II. PILOT PLANT EVALUATIONS |
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The pilot plant treatability studies were designed to interact with combined sewer overflow (CSO) monitoring and system modeling efforts for the Rochester Pure Water District with ...
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COMBINED USE OF ION EXCHANGE RESINS AND GRANULAR ACTIVATED CARBON FOR THE CONTROL OF ORGANIC MATTER AND DISINFECTION BY PRODUCTS |
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The use of anion exchange resin as a pretreatment step to granular activated carbon is evaluated. erformance is evaluated by DOC, SAC, TOXFP, and THMFP parameters. hio River water ...
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COMBINING LIDAR ESTIMATES OF BIOMASS AND LANDSAT ESTIMATES OF STAND AGE FOR SPATIALLY EXTENSIVE VALIDATION OF MODELED FOREST PRODUCTIVITY. (R828309) |
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Extensive estimates of forest productivity are required to understand the
relationships between shifting land use, changing climate and carbon storage
and fluxes. Abov...
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COMBUSTION ADDITIVES FOR POLLUTION CONTROL - A STATE-OF-THE-ART REVIEW |
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The report is a state-of-the-art review of the potential of combustion-type fuel additives in reducing air pollutant emissions from oil and coal firing. It contains two complementa...
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COMBUSTION AREA SOURCES: DATA SOURCES |
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The report identifies, documents, and evaluates data sources for stationary area source emissions, including solid waste and agricultural burning. rea source emissions of particula...
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COMBUSTION RESEARCH ON THE FATE OF FUEL-NITROGEN UNDER CONDITIONS OF PULVERIZED COAL COMBUSTION |
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The report gives results of an experimental investigation of coal pyrolysis and oxidation, and char oxidation to determine the effects of temperature and fuel/oxygen equivalence ra...
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COMBUSTOR STUDY OF THE DEACTIVATION OF A THREE-WAY CATALYST BY LEAD AND MANGANESE |
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The activity and durability of a platinum-rhodium automotive three-way catalyst were investigated as a function of lead and manganese fuel levels using a pulse-flame combustor. Tot...
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COMPARATIVE IN VITRO PULMONARY TOXICITY OF ENGINEERED, MANUFACTURED, AND ENVIRONMENTAL NANOPARTICLES |
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Engineered nanomaterials display many unique physicochemical properties for a variety of applications and due to their novel propertiesapplications may have unique routes of exposu...
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COMPARING EQUILIBRIUM AND TRANSPORT MODELING PREDICTIONS TO OBSERVED PARTICULATE METAL TRANSPORT IN A MINING-IMPACTED STREAM (NORTH FORK CLEAR CREEK, CO) |
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Acid-mine drainage (AMD) is an important source of metals to aquatic ecosystems. Once AMD is mixed with oxygenated stream water of neutral pH, there are changes associated with the...
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COMPARING FUNCTIONAL ASSESSMENTS OF WETLANDS TO MEASUREMENTS OF SOIL CHARACTERISTICS AND NITROGEN PROCESSING |
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One beneficial service of wetland ecosystems is the improvement of water quality through
nitrogen (N) removal. However, one important N-removal process, denitrification, can produ...
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COMPARING RBF WITH BENCH-SCALE CONVENTIONAL TREATMENT FOR PRECURSOR REDUCTION |
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The reduction of disinfection by-product (DBP) precursors upon riverbank filtration (RBF) at three drinking water utilities in the mid-Western United States was compared with that ...
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COMPARING STABLE CARBON ISOTOPE AND RESPIROMETRIC TECHNIQUES FOR EVALUATING BIODEGRADATION |
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Biodegradation of petrochemical contaminants such as crude oil and polychlorinated biphenyls has been determined to remove these contaminants from the environment. The biological ...
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COMPARISON BETWEEN CONDITIONAL PROBABILITY FUNCTION AND NONPARAMETRIC REGRESSION FOR FINE PARTICLE SOURCE DIRECTIONS. (R831078) |
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The objective of this study is to examine the use of conditional probability function (CPF) and nonparametric regression (NPR) to identify directions of PM2.5 (particulate matte...
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COMPARISON OF 0600 - 0900 AM HYDROCARBON COMPOSITIONS OBTAINED FROM 29 CITIES |
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The report describes and compares 0600 - 0900 AM nonmethane organic carbon (NM0C) compound data from 29 cities collected during summer periods of 1984 and 1985. onsiderable differe...
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COMPARISON OF AIR POLLUTANT EMISSIONS FROM THE COMBUSTION OF ORIMULSION AND OTHER FUELS |
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The paper gives results of inhouse emissions testing and a literature review relating to Orimulsion, an emulsion of Venezuelan bitumen, water, and a proprietary surfactant, being u...
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COMPARISON OF AN INNOVATIVE NONLINEAR ALGORITHM TO CLASSICAL LEAST SQUARES FOR ANALYZING OPEN-PATH FOURIER TRANSFORM INFRARED SPECTRA COLLECTED AT A CONCENTRATED SWINE PRODUCTION FACILITY |
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Open-path Fourier transform infrared (OP/FTIR) spectrometry was used to measure the concentrations of ammonia, methane, and other atmospheric gases at an integrated swine productio...
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COMPARISON OF AN INNOVATIVE NONLINEAR ALGORITHM TO CLASSICAL LEAST SQUARES FOR ANALYZING OPEN-PATH FOURIER TRANSFORM INFRARED SPECTRA COLLECTED AT A CONCENTRATED SWINE PRODUCTION FACILITY: JOURNAL ARTICLE |
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NRMRL-RTP-P- 568 Childers, J.W., Phillips, W.J., Thompson*, E.L., Harris*, D.B., Kirchgessner*, D.A., Natschke, D.F., and Clayton, M.J. Comparison of an Innovative Nonlinear Algo...
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COMPARISON OF ANNUAL PRODUCTION ECOLOGY OF NATIVE EELGRASS ZOSTERA MARINA AND THE NON-NATIVE DWARF EELGRASS Z. JAPONICA IN YAQUINA BAY, OREGON |
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When non-native plant species invade a system they often change patterns of primary production. I evaluate the contribution of the seagrass Zostera marina and it's non-native cong...
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COMPARISON OF CARBON AND NITROGEN FLUXES IN TIDEFLAT FOOD WEBS DOMINATED BY BURROWING SHRIMP OR BY CULTURED OYSTERS |
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Two species of indigenous, thalassinid burrowing shrimps are pests to the benthic culture of Pacific oysters (Crassostrea gigas) because deposition of sediment excavated by the shr...
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COMPARISON OF CARDIOPULMONARY FUNCTION IN AWAKE FISCHER-344 AND SPRAGUE-DAWLEY RATS EXPOSED TO CARBON DIOXIDE: A COMPUTERIZED TECHNIQUE |
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A system has been developed to measure simultaneously the effects of inhaled toxicants on cardiopulmonary function in four awake rats before, during and after exposure. ne day prio...
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COMPARISON OF CMAQ DERIVED CARBON MONOXIDE COLUMNS WITH MOPITT CARBON MONOXIDE DATA, SENSITIVITY TO WILDFIRE EMISSIONS |
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All model results need to be evaluated against observed data, no matter what the model
scale. Traditionally for air quality applications, the observed data have been limited...
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COMPARISON OF DATA FROM THE STN AND IMPROVE NETWORKS |
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Two national chemical speciation-monitoring networks operate currently within the United States. The Interagency Monitoring of Protected Visual Environments (IMPROVE) monitoring n...
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COMPARISON OF EMISSIONS AND ORGANIC FINGERPRINTS FROM COMBUSTION OF OIL AND WOOD |
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The paper presents data from an Integrated Air Cancer Project (IACP) pilot study on the total carbon, organics, and particulate emissions from oil furnaces with both gun-type and r...
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COMPARISON OF END-TIDAL BREATH CO (CARBON MONOXIDE) ESTIMATES OF COHB WITH ESTIMATES BASED ON EXPOSURE PROFILES OF INDIVIDUALS IN THE DENVER, COLORADO AND WASHINGTON, DC AREA |
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The U.S. Environmental Protection Agency has sponsored a field study of personal exposures to carbon monoxide (CO) in Washington, D.C., and Denver. CO concentrations in exhaled bre...
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COMPARISON OF GROB CLOSED-LOOP-STRIPPING ANALYSIS (CLSA) TO OTHER TRACE ORGANIC METHODS |
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This paper presents a comparison of experimental results from the analysis of drinking water before and after water treatment using 1 million gallon per day (mgpd) granular activat...
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COMPARISON OF IN VITRO AND IN VIVO METHODS FOR ASSESSING THE EFFECTS OF CARBON TETRACHLORIDE ON THE HEPATIC DRUG-METABOLIZING ENZYME SYSTEM |
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The effect of a single i.p. injection of 0, 20, 200, and 1000 ul/kg carbon tetrachloride on the activity of the hepatic drug-metabolizing enzyme system was measured in the rat by a...
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COMPARISON OF IN VIVO AND IN VITRO METHODS FOR ASSESSING THE EFFECTS OF REPEATED DOSING WITH CARBON TETRACHLORIDE ON THE HEPATIC DRUG-METABOLIZING ENZYME SYSTEM (JOURNAL VERSION) |
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The effect of a single i.p. injection of 0, 20, 200, and 1000 microliters/kg carbon tetrachloride on the activity of the hepatic drug-metabolizing enzyme system was measured in the...
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COMPARISON OF INTEGRATED SAMPLERS FOR MASS AND COMPOSITION |
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The primary objective of EPA's Atlanta Supersites Project was to compare and evaluate a wide variety of samplers from time-integrated mass only monitors, to integrated and semi-c...
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COMPARISON OF INTEGRATED SAMPLERS FOR MASS AND COMPOSITION DURING THE 1999 ATLANTA SUPERSITES PROJECT |
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The first of EPA's Particulate Matter (PM) Supersites projects was established in Atlanta, GA during the summer of 1999 in conjunction with the Southern Oxidants Study. The shor...
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COMPARISON OF MEASURED AND MODELED SURFACE FLUXES OF HEAT, MOISTURE, AND CHEMICAL DRY DEPOSITION |
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Realistic air quality modeling requires accurate simulation of both meteorological and chemical processes within the planetary boundary layer (PBL). n vegetated areas, the primary ...
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COMPARISON OF METHODS FOR DETERMINATION OF DISSOLVED INORGANIC CARBON |
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The presentation reviews several approaches for determining dissolved inorganic carbon (DIC) in drinking water. xperimental studies compared the accuracy and precision of DIC deter...
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COMPARISON OF METHODS TO DETERMINE OXYGEN DEMAND FOR BIOREMEDIATION OF A FUEL CONTAMINATED AQUIFER |
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Four analytical methods were compared for estimating concentrations of fuel contaminants in subsurface core samples. he methods were total organic carbon, chemical oxygen demand, o...
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COMPARISON OF NATURAL AND MAN-MADE HYDROCARBON EMISSION INVENTORIES NECESSARY FOR REGIONAL ACID DEPOSITION AND OXIDANT MODELING |
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A biogenic hydrocarbon emission inventory system was developed for the northeastern United States with design options for extension to other areas. Emissions from trees, leaf litte...
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COMPARISON OF NONMETHANE ORGANIC COMPOUND CONCENTRATIONS DATA COLLECTED BY TWO METHODS IN ATLANTA |
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The Clean Air Act Amendments of 1990, Title 1, call for "enhanced monitoring" of ozone, which is planned to include measurements of atmospheric non-methane organic compounds (NMOC'...
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COMPARISON OF OZONE CONTACTORS FOR MUNICIPAL WASTEWATER EFFLUENT DISINFECTION, PACKED COLUMN VERSUS JET SCRUBBER |
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Pilot scale investigations were made comparing two ozone contactors, a jet scrubber and a packed column, for ozone utilization and effluent coliform reduction efficiency. The conta...
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COMPARISON OF PARTICLE SIZE DISTRIBUTIONS AND ELEMENTAL PARTITIONING FROM THE COMBUSTION OF PULVERIZED COAL AND RESIDUAL FUEL OIL |
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The paper gives results of experimental efforts in which three coals and a residual fuel oil were combusted in three different systems simulating process and utility boilers. Part...
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COMPARISON OF PHOTOCHEMICAL BEHAVIOR OF VARIOUS HUMIC SUBSTANCES IN WATER: III. SPECTROSCOPIC PROPERTIES OF HUMIC SUBSTANCES |
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Spectral absorption coefficients and fluorescence quantum efficiencies were determined for humic substances from a variety of sources. Specific absorption coefficients, K(h), for h...
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COMPARISON OF PROCEDURES TO DETERMINE ADSORPTION CAPACITY OF VOLATILE ORGANIC COMPOUNDS ON ACTIVATED CARBON |
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Numerous volatile organic compounds (VOCs) are under regulatory consideration for inclusion in the National Primary Drinking Water Standards. Adsorption is a cost-effective treatme...
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COMPARISON OF SAMPLING METHODS FOR SEMI-VOLATILE ORGANIC CARBON (SVOC) ASSOCIATED WITH PM 2.5 |
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This study evaluates the influence of denuder sampling methods and filter collection media on the measurement of semi-volatile organic carbon (SVOC) associated with PM2.5. Two t...
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COMPARISON OF SAMPLING METHODS FOR SEMI-VOLATILE ORGANIC CARBON ASSOCIATED WITH PM 2.5 |
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This study evaluates the influence of denuder sampling methods and filter collection media on the measurement of semi-volatile organic carbon (SVOC) associated with PM2.5. Two t...
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COMPARISON OF SAMPLING METHODS FOR SEMI-VOLATILE ORGANIC CARBON ASSOCIATED WITH PM2.5. (R827993) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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COMPARISON OF SEASONAL PATTERNS OF PHOTOSYNTHATE PRODUCTION AND USE IN BRANCHES OF RED SPRUCE AT TWO ELEVATIONS |
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Seasonal patterns of carbon transport from 14C-labeled foliage were examined in red spruce (Picea rubens Sarg.) branches at 1935 and 1720m elevations in the Great Smoky Mountains N...
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COMPARISON OF SOIL VOCS MEASURED BY SOIL GAS, HEATED HEADSPACE, AND METHANOL EXTRACTION TECHNIQUES |
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Comparsions of soil volatile organic compound (VOC) measurement techniques and soil properties expected to influence these measurements were performed at two dissimilar sites. A to...
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COMPARISON OF SOME PROPERTIES OF MINESOILS AND CONTIGUOUS NATURAL SOILS |
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Four minesoil pits located within the disturbed area and four natural soil pits located in adjacent undisturbed areas were described and sampled. Bulk densities were determined at ...
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COMPARISON OF THE RECOVERIES OF ESCHERICHIA COLI AND TOTAL COLIFORMS FROM DRINKING WATER BY THE MI AGAR METHOD AND THE U.S. ENVIRONMENTAL PROTECTION AGENCY-APPROVED MEMBRANE FILTER METHOD |
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Drinking water regulations under the Final Coliform Rule require that total coliform-positive drinking water samples be examined for the presence of Escherichia coli or fecal colif...
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COMPARISON OF TWO METHODS TO ASSESS THE CARBON BUDGET OF FOREST BIOMES IN THE FORMER SOVIET UNION |
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The sink of CO2 and the carbon budget of forest biomes of the former Soviet Union (FSU) were assess with two distinct approaches: 1) ecosystem/ecoregional, and 2) forest statistica...
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COMPARISONS OF COARSE AND FINE VERSIONS OF TWO CARBONS FOR REDUCING THE BIOAVAILABILITIES OF SEDIMENT-BOUND HYDROPHOBIC ORGANIC CONTAMINANTS |
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Course (whole) and finely ground Ambersorb 1500 and course and fine coconut charcoal were compared as to their efficiencies in scavenging organic contaminants desorbed from sedimen...
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COMPARISONS OF SOXHLET EXTRACTION, PRESSURIZED LIQUID EXTRACTION, SUPERCRITICAL FLUID EXTRACTION, AND SUBCRITICAL WATER EXTRACTION FOR ENVIRONMENTAL SOLIDS: RECOVERY, SELECTIVITY, AND EFFECTS ON SAMPLE MATRIX. (R825394) |
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Extractions of a polycyclic aromatic hydrocarbon (PAH)-contaminated soil from a former manufactured gas plant site were performed with a Soxhlet apparatus (18 h), by pressurized li...
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COMPENDIUM OF METHODS FOR THE DETERMINATION OF AIR POLLUTANTS IN INDDOR AIR |
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Determination of pollutants in indoor air is a complex task because of the wide variety of compounds of Interest and the lack of standardized sampling and analysis procedures. o as...
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COMPENSATORY TRACKING IN HUMANS WITH ELEVATED CARBOXYHEMOGLOBIN |
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A total of seventy-four men divided into five groups performed a compensatory tracking task for 4 hr with group mean carboxyhemoglobin (COHb) levels of 0.9, 5.6, 6.1, 11.4 or 16.6%...
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COMPETITIVE ADSORPTION OF VOCS AND BOM: THE ROLE OF MOLECULAR OXYGEN |
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The impact of molecular oxygen on the adsorptive capacity of activated carbon for volatile organic compounds (VOCS) was evaluated in this study. nvestigations involved VOC solution...
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COMPLETE ELIMINATION OF CARBONATES: A CRITICAL STEP IN THE ACCURATE MEASUREMENT OF ORGANIC AND BLACK CARBON IN SEDIMENTS |
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Accurate measurement of organic and black carbon in sediments requires the complete removal of coexisting inorganic carbonates from the sample prior to instrumental analysis....
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COMPOSITION AND ABOVEGROUND TREE BIOMASS OF A DRY SEMI-EVERGREEN FOREST ON MEXICO'S YUCATAN PENINSULA |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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COMPOSITION OF LEACHATES FROM ACTUAL HAZARDOUS WASTE SITES |
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The document lists the chemical composition of leachates from 13 hazardous waste sites located through the U.S. Based on this data, laboratory formulated 'leachates' were suggested...
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COMPOSITION OF MOTOR VEHICLE ORGANIC EMISSIONS UNDER ELEVATED TEMPERATURE SUMMER DRIVING CONDITIONS (75 TO 105 DEGREES F) |
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Emissions from seven late-model popular V-6 and V-8 motor vehicles were characterized at three test temperatures. ix port fuel injected (PFI) and a single carbureted vehicle were t...
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COMPOSITION OF PM 2.5 DURING THE SUMMER OF 2003 IN RESEARCH TRIANGLE PARK, NC |
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A field study was carried out during the summer of 2003 to examine the overall composition of fine particulate matter (PM2.5) in Research Triangle Park, North Carolina, ...
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COMPOSITION OF PM 2.5 DURING THE SUMMER OF 2003 IN RESEARCH TRIANGLE PARK, NORTH CAROLINA |
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Ambient PM2.5 contains a complex mixture of organic and inorganic compounds which may be derived from primary emission to the atmosphere or from secondary reaction proce...
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COMPOSITION OF PM2.5 IN RESEARCH TRIANGLE PARK, NORTH CAROLINA, USA DURING THE WINTER OF 2003 |
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Ambient PM2.5 contains a variety of inorganic compounds, nearly all of which can be measured, and a complex mixture of organic compounds, of which less than 20% of the constitue...
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COMPOSITION OF SIZE-FRACTIONATED AEROSOL IN CHARLESTON, WEST VIRGINIA |
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Atmospheric aerosols were collected during a 21 day period in late summer of 1976 in Charleston, West Virginia, using five dichotomous virtual impactor samplers simultaneously. The...
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COMPOST-FREE BIOLOGICAL TREATMENT OF ACID ROCK DRAINAGE, TECHNICAL EVALUATION BULLETIN |
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As part of the Superfund Innovative Technology Evaluation (SITE) program, an evaluation of the compost-free bioreactor treatment of acid rock drainage (ARD) from the Aspen Seep was...
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COMPOST-FREE BIOREACTOR TREATMENT OF ACID ROCK DRAINAGE - TECHNOLOGY CAPSULE |
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As part of the Superfund Innovative Technology Evaluation (SITE) program, an evaluation of the compost-free bioreactor treatment of acid rock drainage (ARD) from the Aspen Seep was...
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COMPOST-FREE BIOREACTOR TREATMENT OF ACID ROCK DRAINAGE LEVIATHAN MINE, CALIFORNIA INNOVATIVE TECHNOLOGY EVALUATION REPORT |
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As part of the Superfund Innovative Technology Evaluation (SITE) program, an evaluation of the compost-free bioreactor treatment of acid rock drainage (ARD) from the Aspen Seep was...
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COMPOUND-SPECIFIC CARBON AND HYDROGEN ISOTOPE ANALYSIS-FIELD EVIDENCE OF MTBE BIOREMEDIATION |
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Chemical reactions (including bio- and abiotic degradation) tend to favor molecules with the lighter isotopic species (e.g., 12C, 1H), resulting in enrichment of the heavier isotop...
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COMPOUND-SPECIFIC ISOTOPE ANALYSIS OF MTBE AND TBA FOR BIOREMEDIATION STUDIES |
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The utility of stable isotope ratios to detect biodegradation for a number of chemical compounds including MTBE and TBA has been demonstrated in a number of laboratory or field stu...
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COMPOUND-SPECIFIC STABLE ISOTOPE ANALYSIS TO DEMONSTRATE IN-SITU MTBE BIOTRANSFORMATION |
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Changes in the stable isotopic composition of organic contaminants (isotopic fractionation) are a useful indicator of biotransformation, and have been reported in literature for se...
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COMPOUND-SPECIFIC STABLE ISOTOPE ANALYSIS TO DEMONSTRATE IN-SITU MTBE BIOTRANSFORMATION |
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Change of stable isotope composition of organic contaminants (isotopic fractionation) is a useful indicator of biotransformation. Most of applications to date are in the area of ch...
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COMPUTER COST MODELS FOR POTABLE WATER TREATMENT PLANTS |
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A series of computer programs have been developed which calculate costs for specific unit treatment processes used in water treatment plants. The programs contained in this report ...
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COMPUTER SIMULATOR (BEST) FOR DESIGNING SULFATE-REDUCING BACTERIA FIELD BIOREACTORS |
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BEST (bioreactor economics, size and time of operation) is a spreadsheet-based model that is used in conjunction with public domain software, PhreeqcI. BEST is used in the design p...
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CONCENTRATION AND TREATMENT OF DRINKING WATERS IN THE FOUR LAB STUDY |
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The purpose of the four lab study was to address concerns related to potential health effects from exposure to complex mixtures of DBPs that cannot be addressed directly from toxic...
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CONCENTRATION TECHNOLOGIES FOR HAZARDOUS AQUEOUS WASTE TREATMENT |
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A stepwise evaluation of the potential applicability of the candidate technologies to the identified contamination problems was carried out. Technology profiles describing the pert...
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CONCENTRATIONS AND COMPOSITION OF PM AT GROUND ZERO AND LOWER MANHATTAN FOLLOWING THE COLLAPSE OF THE WTC |
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The U.S. EPA National Exposure Research Laboratory (NERL), in conjunction with our Regional offices, established a network of air monitoring sites to characterize ambient air con...
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CONCENTRATIONS AND COMPOSITIONS OF POLYBROMINATED BIPHENYLS, -DIBENZO-P-DIOXINS, AND -DIBENZOFURANS IN TECHNICAL POLYBROMINATED DIPHENYL ETHER PREPARATIONS. |
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Polybrominated diphenyl ethers (PBDEs) have been used as flame retardants in textiles, electronic equipment and plastics.1 The three major commercial products available in the mark...
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CONCENTRATIONS AND SPECIATION OF PM AT GROUND ZERO AND LOWER MANHATTAN FOLLOWING THE COLLAPSE OF THE WTC |
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The U.S. EPA National Exposure Research Laboratory (NERL), in conjunction with our Regional offices, established a network of air monitoring sites to characterize ambient air con...
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CONCENTRATIONS OF TOXIC AIR POLLUTANTS IN THE U.S. SIMULATED BY AN AIR QUALITY MODEL |
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As part of the US National Air Toxics Assessment, we have applied the Community Multiscale Air Quality Model, CMAQ, to study the concentrations of twenty gas-phase, toxic, hazardou...
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CONCEPTUAL APPROACHES FOR INCORPORATING CLIMATIC CHANGE INTO THE DEVELOPMENT OF FOREST MANAGEMENT OPTIONS FOR SEQUESTERING CARBON |
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The potential for significant environmental change over the next 100 years has resulted in efforts to develop mitigation options for reducing the rate of increase of carbon dioxide...
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CONCEPTUAL BASIS FOR MULTI-ROUTE INTAKE DOSE MODELING USING AN ENERGY EXPENDITURE APPROACH |
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This paper provides the conceptual basis for a modeling logic that is currently being developed in the National Exposure Research Laboratory (NERL) of the U.S. Environmental Prot...
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CONCEPTUAL DESIGN ISSUE: DEVELOPING A NEW HIGHWAY VEHICLE EMISSION ESTIMATION METHODOLOGY |
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The paper reports on EPA's effort to define the design of an ideal methodology for estimating emissions from highway vehicles. The design concept will be used by EPA to focus resea...
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CONCERNS WITH USING CHLORINE DIOXIDE DISINFECTION IN THE UNITED STATES |
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There is a renewed interest in disinfection with chlorine dioxide in the United States because of upcoming Federal regulations on disinfection by-products. ench studies and field a...
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CONFERENCE SUMMARY: PRACTICAL ASPECTS OF THE DESIGN AND USE OF GAC |
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A conference on the design and use of granular activated carbon (GAC) was cosponsored May 9-10, 1989, by the AWWA Research Foundation (AWWARF) and the U.S. Environmental Protection...
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CONFERENCE SUMMARY: PRACTICAL ASPECTS OF THE DESIGN AND USE OF GAC |
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This article is based on papers presented at a 1989 conference on the design and use of granular activated carbon (GAC) systems. The conference was cosponsored by the AWWA Researc...
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CONFIRMATIONAL IDENTIFICATION OF ESCHERICHIA COLI, A COMPARISON OF GENOTYPIC AND PHENOTYPIC ASSAYS FOR GLUTAMATE DECARBOXYLASE AND B-D-GLUCURONIDASE |
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Genotypic and phenotypic assays for glutamate decarboxylase (GAD) and B-D-glucuronidase (GUD) were compared for their abilities to detect various strains of Escherichia coli and to...
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CONSEQUENCES OF PROTIST-STIMULATED BACTERIAL PRODUCTION FOR ESTIMATING PROTIST GROWTH EFFICIENCIES |
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The trophic link between bacteria and bacterivorous protists is a complex interaction that involves feedback of inorganic nutrients and growth substrates that are immediately avail...
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CONSERVATION AND SEQUESTRATION OF CARBON: THE POTENTIAL OF FOREST AND AGROFOREST MANAGEMENT PRACTICES |
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Forests play a major role in the Earth's carbon cycle through assimilation, storage, and emission of CO2. stablishment and management of boreal, temperate, and tropical forest and ...
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CONSERVATION TILLAGE IMPACTS ON NATIONAL SOIL AND ATMOSPHERIC CARBON LEVELS |
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Soil organic matter is the largest global terrestrial C pool and is a source of CO2, CH4 and other greenhouse gases. hanges in soil organic C (SOC) content and fossil fuel C emissi...
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CONSIDERATIONS FOR A REGULATORY FRAMEWORK FOR LARGE-SCALE GEOLOGIC SEQUESTRATION OF CARBON DIOXIDE: A NORTH AMERICAN PERSPECTIVE |
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Large scale geologic sequestration (GS) of carbon dioxide poses a novel set of challenges for regulators. This paper focuses on the unique needs of large scale GS projects in ligh...
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CONSIDERATIONS IN GRANULAR ACTIVATED CARBON TREATMENT OF COMBINED INDUSTRIAL WASTEWATERS |
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The objective of this project was to examine the use of activated carbon in reducing the content of biologically resistant organic compounds in a combined industrial wastewater tre...
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CONSISTENT PULMONARY AND SYSTEMIC RESPONSES FROM INHALATION OF FINE CONCENTRATED PARTICLES: THE ROLES OF RAT STRAINS USED AND PHYSICOCHEMICAL PROPERTIES |
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Several studies have reported health effects of concentrated ambient particles (CAPs) in rodents and humans, however, toxicity end points used in rodents have not provided consiste...
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CONSTANT VOLUME SAMPLING SYSTEM WATER CONDENSATION |
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Combustion of organic motor vehicle fuels produces carbon dioxide and water (H2O) vapor (and also products of incomplete combustion, e.g. hydrocarbons and carbon monoxide, at lower...
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CONSTRUCTED WETLANDS IN SUPPORT OF RIPARIAN RESTORATION: WATER QUALITY BENEFITS AND HABITAT RESTORATION IN DELAWARE AGRICULTURAL AREAS |
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Surface water runoff from agricultural landscapes is one of the major sources of water quality impairment in the United States. With the advent of buffer strips and conservation m...
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CONSTRUCTION OF MODULAR FIELD-BIOREACTOR FOR ACID MINE DRAINAGE TREATMENT |
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The paper focuses on the improvements to engineered features of a passive technology that has been used for remediation of acid rock drainage (ARD). This passive remedial technolo...
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CONTINUED RESEARCH IN MESOSCALE AIR POLLUTION SIMULATION MODELING. VOLUME 5. REFINEMENTS IN NUMERICAL ANALYSIS, TRANSPORT, CHEMISTRY, AND POLLUTANT REMOVAL |
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Two numerical integration methods identified as having features that provided significant improvements over the technique originally embedded in the Airshed Model have been evaluat...
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CONTINUOUS AIR POLLUTION SOURCE MONITORING SYSTEMS |
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This handbook provides the eetailed information necessary to develop a continuous emissions monitoring program at a stationary source facility. Federal and State EPA requirements a...
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CONTINUOUS BLACK CARBON MEASUREMENTS INDOORS AND OUTDOORS AT AN OCCUPIED HOUSE FOR ONE YEAR |
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Black carbon is one of the components of particulate matter, and is of importance because the only known source of aerosol black carbon in the atmosphere is the combustion of car...
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CONTINUOUS MEASUREMENT OF DIESEL PARTICULATE EMISSIONS (JOURNAL VERSION) |
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Evaluation of emerging diesel particulate emissions control technology will require analytical procedures capable of continuous measurement of transient organic and elemental carbo...
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CONTINUOUS MICROWAVE REACTORS FOR ORGANIC SYNTHESIS: HYDRODECHLORINATION AND HYDROLYSIS |
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Microwave heating has been sought as a convenient way of enhancing chemical processes. The advantages of microwave heating, such as selective direct heating of materials of a catal...
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CONTINUOUS REMOVAL OF BOTH MUTAGENS AND MUTAGEN-FORMING POTENTIAL BY AN EXPERIMENTAL FULL-SCALE GRANULAR ACTIVATED CARBON TREATMENT SYSTEM |
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Trends in the removal of mutagens and of total organic carbon (TOC) were measured for granular activated carbon (GAC) in use at the Cincinnati Water Works. (Copyright (c) 1985 by t...
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CONTINUOUS STIRRED TANK REACTOR INVESTIGATION OF THE GAS-PHASE REACTION OF HYDROXYL RADICALS AND TOLUENE |
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A continuous stirred tank reactor (CSTR) was used to study the gas phase reaction between HO and toluene. HO was generated by the in situ photolysis of nitrous acid. Flow reactor o...
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CONTRIBUTIONS OF CURRENT YEAR PHOTOSYNTHATE TO FINE ROOTS ESTIMATED USING A 13C-DEPLETED CO2 SOURCE |
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The quantification of root turnover is necessary for a complete understanding of plant carbon (C) budgets, especially in terms of impacts of global climate change. To improve esti...
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CONTRIBUTIONS OF TOLUENE AND Α -PINENE TO SOA FORMED IN AN IRRADIATED TOLUENE/Α-PINENE/NOX/AIR MIXTURE: COMPARISON OF RESULTS USING 14C CONTENT AND SOA ORGANIC TRACER METHODS |
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An organic tracer method, recently proposed for estimating individual contributions of toluene and α-pinene to secondary organic aerosol (SOA) formation, was evaluated by conductin...
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CONTROL CHARACTERISTICS OF CARBON BEDS FOR GASOLINE VAPOR EMISSIONS |
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The report gives results of a study of the practical working capacity of activated carbon to cyclically adsorb gasoline vapor which would otherwise be lost to the atmosphere; e.g.,...
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CONTROL OF AROMATIC WASTE AIR STREAMS BY SOIL BIOREACTORS |
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Contamination of groundwater resources is a serious environmental problem which is continuing to increase in occurrence in the United States. It has been reported that leaking unde...
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CONTROL OF DISINFECTION BY-PRODUCTS AND BIODEGRADABLE ORGANIC MATTER THROUGH BIOLOGICAL TREATMENT |
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The optimal use of ozonation as a pretreatment process prior to biological treatment of Ohio River water was investigated at both the bench (batch) and pilot-plant (continuous flow...
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CONTROL OF HYDROCARBON EMISSIONS FROM COTTON AND SYNTHETIC TEXTILE FINISHING PLANTS |
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The report gives results of an evaluation of the applicability and economics of emissions control technologies for the abatement of volatile organic compounds emanating from cotton...
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CONTROL OF MICROBIAL CONTAMINANTS AND DISINFECTION BY-PRODUCTS IN DRINKING WATER: COST AND PERFORMANCE |
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The U.S. Environmental Protection Agency (U.S. EPA) is in the process of developing a sophisticated regulatory strategy in an attempt to balance the risks associated with disinfect...
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CONTROL OF TRIHALOMETHANE PRECURSORS IN DRINKING WATER: GRANULAR ACTIVATED CARBON WITH AND WITHOUT PREOZONATION |
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In a pilot study that lasted 80 weeks, unozonated and ozonated waters were fed to granular activated carbon (GAC) columns to compare the removal of trihalomethane formation potenti...
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CONTROL TECHNOLOGY CENTER, 1990 - A YEAR OF EXPANDING SERVICE |
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The report discusses services provided by EPA's Control Technology Center (CTC) during FY90. he CTC, developed by EPA's Office of Research and Development (ORD) and Office of Air P...
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CONTROL TECHNOLOGY EVALUATION FOR GASOLINE LOADING OF BARGES |
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The report gives results of a study to determine the feasibility, safety, and cost of methods to control the emission of hydrocarbon vapor during the loading of gasoline barges. Ap...
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CONTROL TECHNOLOGY OVERVIEW REPORT: CFC-11 EMISSIONS FROM FLEXIBLE POLYURETHANE FOAM MANUFACTURING |
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The report gives results of an engineering evaluation of technical options to reduce chlorofluorocarbon (CFC) emissions from flexible slabstock and molded polyurethane foam manufac...
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CONTROLLED METHYL TERTIARY BUTYL ETHER (MTBE) EXPOSURE TO HUMANS THROUGH DERMAL, INGESTION, AND INHALATION ROUTES AND THE RESULTANT BIOMARKER TERTIARY BUTYL ALCOHOL (TBA) AS MEASURED IN EXHALED BREATH AND VENOUS BLOOD |
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Radiocarbon (14C) measurements provide an estimate of the fraction of carbon in a sample that is biogenic. In September 1997 during SCOS97 a series of 3-h canister samples of am...
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CONTROLLED RELEASE, BLIND TEST OF DNAPL REMEDIATION BY ETHANOL FLUSHING |
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A dense nonaqueous phase liquid (DNAPL) source zone was established within a sheet-pile
isolated cell through a controlled release of perchloroethylene (PCE) to evaluate DNAPL |
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CONTROLLED, SHORT-TERM DERMAL AND INHALATION EXPOSURE TO MTBE AND DIBROMOCHLOROMETHANE |
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The oxygenate methyl tert-butyl ether (MTBE) has been added to gasoline to meet national ambient air quality standards in those parts of the US that are non-compliant for carbon ...
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CONTROLLING AIR TOXICS (CAT), VERSION 1.0. TUTORIAL MANUAL |
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The manual gives instructions for using Controlling Air Toxics (CAT). The primary objective of this interactive and user-friendly software package is to assist in the review of air...
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CONTROLLING ORGANICS WITH GAC: A COST AND PERFORMANCE ANALYSIS |
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The amendments to the US Safe Drinking Water Act require extensive evaluation of the feasibility of removing organic compounds using granular activated carbon (GAC). To meet deadli...
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CONVENTIONAL TERTIARY TREATMENT |
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Tertiary treatment on effluent from the EPA-DC Pilot Plant's step aeration activated sludge system included two-stage or single-stage lime clarification, air stripping of ammonia, ...
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CONVENTIONAL WATER TREATMENT AND DIRECT FILTRATION: TREATMENT AND REMOVAL OF TOTAL ORGANIC CARBON AND TRIHALOMETHANE PRECURSORS |
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After describing the fundamentals of coagulation of humic substances for alum and cationic polyelectrolytes, field studies of two conventional-type water treatment plants are discu...
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CONVERSION OF CATTLE MANURE INTO USEFUL PRODUCTS |
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The purpose of the project was to design and build a pyrolysis apparatus for cattle manure and to investigate the potential uses of the pyrolysis by-products. A pyrolysis machine o...
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CONVERSION OF ORGANIC WASTES TO UNLEADED, HIGH-OCTANE GASOLINE |
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This project has demonstrated the marriage of two diverse technologies previously considered to be unrelated--the pyrolysis of organic wastes and the low-pressure polymerization of...
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CONVERTING ROCK TRICKLING FILTERS TO PLASTIC MEDIA: DESIGN AND PERFORMANCE |
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This investigation was undertaken with the objectives of reviewing the conversion of trickling filters at the Stockton, California, Regional Wastewater Control Facility from rock m...
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COPPER PITTING CORROSION: A CASE STUDY |
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Localized or pitting corrosion of copper pipes used in household drinking-water plumbing is a problem for many water utilities and their customers. Extreme attack can lead to pinho...
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COPROCESSING OF FOSSIL FUELS AND BIOMASS FOR CO2 EMISSION REDUCTION IN THE TRANSPORTATION SECTOR |
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The paper discusses an evaluation of the Hydrocarb process for conversion of carbonaceous raw material to clean carbon and methanol products. hese products are valuable in the mark...
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CORRELATION OF COLIFORM GROWTH RESPONSE WITH OTHER WATER QUALITY PARAMETERS |
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A variety of water types collected from different stages of water treatment from different geographical areas were analyzed by bioassay for their ability to support the growth of c...
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CORRELATION OF POLYCHLORINATED NAPHTHALENES WITH POLYCHLORINATED DIBENZOFURANS FORMED FROM WASTE INCINERATION |
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Isomer composition of polychlorinated naphthalenes (PCNs) was measured for municipal waste incinerator fly ash samples,and for emission samples produced from soot and copper deposi...
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CORRELATION OF THE PARTITIONING OF DISSOLVED ORGANIC MATTER FRACTIONS WITH THE DESORPTION OF CD, CU, NI, PB AND ZN FROM 18 DUTCH SOILS |
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Eighteen Dutch soils were extracted in aqueous solutions at varying pH. Extracts were analyzed for Cd, Cu, Ni, Pb and Zn by ICP-AES. Extract dissolved organic carbon (DOC) was al...
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CORRELATIONS FOR THE DETERMINATION OF SURFACE DIFFUSIVITIES OF ORGANIC CHEMICALS ADSORBED ONTO GRANULAR ACTIVATED CARBON |
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Differential column batch reactor (DCBR) experiments in organic-free water were conducted for the following volatile organic compounds (VOCs): trichloroethene, tetrachloroethene, c...
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COSOLVENT EFFECTS ON ORGANIC CHEMICAL PARTITIONING TO SEDIMENT ORGANIC CARBON |
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Sorption-desorption hysteresis, slow desorption kinetics and resultant bioavailability, and other nonideal phenomena have been attributed to the differing sorptive characteristics ...
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COSOLVENT EFFECTS ON PHENANTHRENE SORPTION-DESORPTION ON A FRESH-WATER SEDIMENT |
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This study evaluated the effects of the water-miscible cosolvent methanol on the sorption-desorption of phenanthrene by the natural organic matter (NOM) of a fresh-water sediment. ...
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COST AND BENEFITS OF DRINKING WATER TREATMENT |
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The article develops a framework for evaluating the costs and benefits of environmental control and preventive public health practices and asks the policy question: How do the auth...
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COST AND PERFORMANCE EVALUATION FOR FULL SCALE, SINGLE SOLUTE CONTROL OF SYNTHETIC ORGANIC CHEMICALS BY GRANULAR ACTIVATED CARBON ADSORPTION |
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The Drinking Water Research Division of the U.S. Environmental Protection Agency has responsibility for obtaining data on the performance and cost of granular activated carbon (GAC...
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COST AND PERFORMANCE MODEL FOR EVALUATING FIELD SCALE GRANULAR ACTIVATED CARBON SYSTEMS |
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Much has been written concerning the prediction of granular activated carbon (GAC) adsorption performance. Various types of models have been suggested to simulate the performance o...
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COST AND PERFORMANCE OF GAC (GRANULAR ACTIVATED CARBON) FOR TRIHALOMETHANE CONTROL |
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Lower trihalomethane (THM) standards may force many drinking water utilities to change disinfectants or consider using various treatment technologies ranging from conventional trea...
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COST DIGEST: COST SUMMARIES OF SELECTED ENVIRONMENTAL CONTROL TECHNOLOGIES |
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The report summarizes cost data on over 20 environmental control technologies. The cost parameters presented include total capital investment, net annual operating expenses, and un...
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COST ESTIMATES FOR CONTROLLING SOCS BY GAC TREATMENT |
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The Drinking Water Research Division of EPA has a major role in evaluating the cost and performance of technology considered as part of drinking water regulations. his paper examin...
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COUNTERFLOW OXIDATIVE REGENERATION OF GRANULAR CARBON ADSORBENTS. (R825549C011) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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COUPLED CARBON AND WATER FLUX MODEL TO PREDICT VEGETATION STRUCTURE |
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NO ABSTRACT PROVIDED...
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CRITERIA POLLUTANT AND ACID AEROSOL CHARACTERIZATION STUDY - CATANO, PUERTO RICO |
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The objective of the Catano Criteria Pollutant and Acid Aerosol Characterization study was to characterize criteria pollutant and acid aerosol concentrations in the Ward of Catano ...
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CRITICAL HEALTH ISSUES ASSOCIATED WITH REVIEW OF THE SCIENTIFIC CRITERIA FOR CARBON MONOXIDE |
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The Clean Air Act (CAA) requires periodic review of existing criteria that form the basis for carbon monoxide (CO) air quality standards. These air quality criteria are to reflect ...
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CRITICAL HEALTH ISSUES OF CRITERIA AIR POLLUTANTS |
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This chapter summarizes the key health information on ubiquitous outdoor air pollutants that can cause adverse health effects at current or historical ambient levels in the Unite...
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CRITICAL MICELLLE DENSITY FOR THE SELF-ASSEMBLY OF BLOCK COPOLYMER SURFACTANTS IN SUPERCRITICAL CARBON DIOXIDE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CRITICAL REVIEW OF ANALYTICAL APPROACHES FOR PETROLEUM CONTAMINATED SOIL |
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Petroleum products comprise a vast continuum of hydrocarbons from gasoline which is mainly short chain and simple aromatic hydrocarbons, passing to kerosene, diesel, and heavy oils...
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CRITIQUE OF CARBON BASED TREE GROWTH MODELS |
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Simulation models of the processes that control carbohydrate balance in coniferous trees are reviewed, and their appropriateness for assessing pollution effects is considered. Curr...
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CROSS-INDUCTION OF PYRENE AND PHENANTHRENE IN MYCOBACTERIUM SP. ISOLATED FROM POLYCYCLIC AROMATIC HYDROCARBON CONTAMINATED RIVER SEDIMENTS |
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A polycyclic aromatic hydrocarbon (PAH)-degrading culture enriched from contaminated river sediments and a Mycobacterium sp. isolated from the enrichment were tested to investigate...
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CURRENT AND FUTURE ENVIRONMENTAL ROLE OF ATMOSPHERIC METHANE: MODEL STUDIES AND UNCERTAINTIES |
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Concern over increasing levels of methane in the atmosphere centers on its radiative and chemical properties. ethane absorbs terrestrial infrared radiation and contributes to the g...
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CURRENT ISSUES REGARDING ENDOCRINE DISRUPTING CHEMICALS AND ANTIBIOTIC RESISTANCE |
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Recently public concern has increased regarding industrial and environmental substances that may have adverse hormonal effects in human and wildlife populations. This concern has a...
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CURRENT LAND COVER IN THE TROPICS AND ITS POTENTIAL FOR SEQUESTERING CARBON |
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NO ABSTRACT PROVIDED...
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CURRENT RESEARCH OF THE ENVIRONMENTAL PROTECTION AGENCY ON AUTOMOTIVE CRITERIA POLLUTANTS |
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The HERL conducts a variety of investigations of the health effects of air pollutants to serve as criteria for the reevaluation of National Ambient Air Quality Standards. Human cli...
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CYANIDE REMOVAL FROM REFINERY WASTEWATER USING POWDERED ACTIVATED CARBON |
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The objective of this project was to evaluate the removal of low level cyanide in petroleum refinery wastewater by the addition of powdered activated carbon and cupric chloride to ...
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CYCLIC VOLTAMMETRY OF ORGANIC AND INORGANIC N-CHLORAMINES IN AQUEOUS SOLUTION |
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Aqueous solutions or organic and inorganic N-chloramines as well as hypochlorite were examined by cyclic voltammetry at DH 8 and in strong acid (pH<2) with platinum and glassy carb...
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CYCLING OF DISSOLVED ELEMENTAL MERCURY IN ARCTIC ALASKAN LAKES. (R829796) |
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Aqueous production and water-air exchange of elemental mercury (Hg0) are important features of the environmental cycling of Hg. We investigated Hg0 cycling...
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CYCLOPENTA-FUSED ISOMERS OF BENZ(A)ANTHRACENE II: MUTAGENIC EFFECTS ON MAMMALIAN CELLS |
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Cyclopenta-fused polycyclic aromatic hydrocarbons (PAH) are a unique class of PAH found in the environment. Acenaphthylene, acephenanthrylene and cyclopenta (cd) pyrene represent c...
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CYP2E1 MEDIATED EXTRAHEPATIC METABOLISM IN PBPK MODELING OF LIPOPHILIC VOLATILE ORGANIC COMPOUNDS |
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Physiologically based pharmacokinetic (PBPK) models increasingly are available for environmental chemicals and applied in risk assessments. Often a simplified representation of a r...
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CYTOTOXICITY AND CELL SIGNALING IN MH-S CELLS: RELATIVE POTENCY OF DIESEL AND COAL COMBUSTION PARTICLES |
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Cytotoxicity and Cell Signaling in MH-S Cells: Relative Potency of Diesel and Coal Combustion Particles P. Singh1, Y. Kostetski2, M. Daniels1, T. Stevens3 and MI Gilmour 1USEPA, RT...
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Chemistry and Long-Term Decomposition of Roots of Douglas-Fir Grown under Elevated Atmospheric Carbon Dioxide and Warming Conditions |
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Elevated atmospheric CO2 concentrations and warming may affect the quality of litters of forest plants and their subsequent decomposition in ecosystems, thereby potentially affecti...
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Chlorine Decay and DBP formation under Different Flow Regions in PVC and Ductile Iron Pipes: Preliminary Results on the Role of flow Velocity and Radial Mass Transfer - Paper |
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A systematic experimental study was conducted using a pilot-scale drinking water distribution system simulator to quantify the effect of hydrodynamics, total organic carbon (TOC), ...
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Chlorine decay and DBP formation under different flow regions in PVC and ductile iron pipes: Preliminary results on the role of flow velocity and radial mass transfer |
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A systematic experimental study was conducted using a pilot-scale drinking water distribution system simulator to quantify the effect of hydrodynamics, total organic carbon (TOC), ...
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Controlling Disinfection Residual Losses in Drinking Water Distribution Systems: Results from Experimental Studies |
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It is generally accepted that water quality can deteriorate in a distribution system through reactions in the bulk phase and/or at the pipe wall. These reactions may be physical, ...
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Correlation of carbon isotope ratios in the cellulose and wood extractives of Douglas-fir |
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Cellulose is usually isolated from the other components of plant material for analysis of carbon stable isotope ratios (δ13C). However, many studies have shown a strong correlation...
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DATA STORAGE AND RETRIEVAL SYSTEM FOR PILOT WASTEWATER TREATMENT RESEARCH. USERS MANUAL |
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The computer system described in this document was designed as a data storage and retrieval system for the water reuse project at the Blue Plains Treatment Plant located at Researc...
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DECADE OF STUDIES OF HUMAN EXPOSURE: WHAT HAVE WE LEARNED? |
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Between 1980 and 1990, EPA's Office of Research and Development carried out four major studies of human exposure to different classes of pollutants. hese are often referred as Tota...
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DECHLORINATION OF TRICHLOROETHYLENE USING ELECTROCHEMICAL METHODS |
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Electrochemical degradation (ECD) is used to decontaminate organic and inorganic contaminants through oxidative or reductive processes. The ECD of Trichloroethylene (TCE) dechlorin...
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DECHLORINATION OF TRICHLOROETHYLENE USING ELECTROCHEMICAL METHODS |
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Electrochemical degradation (ECD) is used to decontaminate organic and inorganic contaminants through oxidative or reductive processes. The ECD of Trichloroethylene (TCE) dechlorin...
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DECOMPOSITION CHARACTERISTICS AND REACTION MECHANISMS OF METHYLENE CHLORIDE AND CARBON TETRACHLORIDE USING METAL-LOADED ZEOLITE CATALYSTS |
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NO ABSTRACT PROVIDED...
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DECOMPOSTION OF GENETICALLY ENGINEERED TOBACCO UNDER FIELD CONDITIONS: PERSISTENCE OF THE PROTEINASE INHIBITOR I PRODUCT AND EFFECTS OF SOIL MICROBIAL RESPIRATION AND PROTOZOA, NEMATODE AND MICROARTHR |
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1. To evaluate the potential effects of genetically engineered (transgenic) plants on soil ecosystems, litterbags containing leaves of non-engineered (parental) and transgenic toba...
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DEGRADATION OF CARBON TETRACHLORIDE BY MODIFIED FENTON'S REAGENT. (R826163) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEGRADATION OF HALOGENATED ALIPHATIC COMPOUNDS BY THE AMMONIA-OXIDIZING BACTERIUM NITROSOMAS EUROPEA |
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Suspensions of Nitrosomonas europaea catalyzed the ammonia-stimulated aerobic transformation of the halogenated aliphatic compounds dichloromethane, dibromomethane, trichloroethane...
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DEGRADATION OF MALATHION BY SALT-MARSH MICROORGANISMS |
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Numerous bacteria from a salt-marsh environment are capable of degrading malathion, an organophosphate insecticide, when supplied with additional nutrients as energy and carbon sou...
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DEGRADATION OF POLYNUCLEAR AROMATIC HYDROCARBONS UNDER BENCH-SCALE COMPOST CONDITIONS |
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The relationship between biomass growth and degradation of polynuclear aromatic hydrocarbons (PAHs) in soil, and subsequent toxicity reduction, was evaluated in 10 in-vessel, bench...
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DEGRADATION OF TRICHLOROETHYLENE UNDER HIGH-TEMPERATURE THERMAL SOURCE-ZONE REMOVAL CONDITIONS (POSTER PRESENTATION) |
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Trichloroethylene (TCE) is a contaminant commonly found in the subsurface at industrial and military installations in the United States. Oxidation of TCE (C2HCl3 |
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DEMINERALIZATION OF CARBON-TREATED SECONDARY EFFLUENT BY SPIRAL-WOUND REVERSE OSMOSIS PROCESS |
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A 56.8 cu m/day (15,000 gallons/day) spiral-wound reverse osmosis pilot plant was operated at the Pomona Advanced Wastewater Treatment Research Facility on the carbon-treated secon...
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DEMONSTRATION BULLETIN: AQUADETOX®/ SVE SYSTEM and AWD Technologies, Inc. |
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The AWD technology simultaneously treats groundwater and soil-gas contaminated with volatile or ganic compounds (VOC), such as trichloroethylene (TCE) and tetrachloroethylene (P...
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DEMONSTRATION BULLETIN: BIOLOGICAL DENITRIFICATION PROCESS |
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NRMRL-CIN-1362
SAIC. Demonstration Bulletin: Biological Denitrification Process, Ecomat, Inc.. 2001. EPA/540/MR-01/501. 03/15/2001
EcoMat, Inc. of Hayward, CA has developed a t...
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DEMONSTRATION BULLETIN: BIOLOGICAL DENITRIFICATION PROCESS, ECOMAT, INC. |
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EcoMat, Inc. of Hayward, CA has developed a two-stage ex situ anoxic biofilter biodenitrification process. The process is a fixed film bioremediation, using biocarriers and specifi...
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DEMONSTRATION BULLETIN: CAV-OX ULTRAVIOLET OXIDATION PROCESS MAGNUM WATER TECHNOLOGY |
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The CAV-OX® technology (see Fig-
ure 1) destroys organic contaminants, including chlorinated hy-
drocarbons, in water. The process uses hydrogen peroxide, hy-
drodynamic cavitat...
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DEMONSTRATION BULLETIN: CYCLONE FURNACE SOIL VITRI- FICATION TECHNOLOGY - BABCOCK & WILCOX |
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Babcock and Wilcox's (B&W) cyclone furnace is an innovative thermal technology which may offer advantages in treating soils containing organics, heavy metals, and/or radionuclide ...
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DEMONSTRATION BULLETIN: EX-SITU ANAEROBIC BIOREMEDIATION SYSTEM: DINOSEB - J.R. SIMPLOT COMPANY |
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The J.R. Simplot Ex-situ Anaerobic Bioremediation System is a technology designed to destroy nitroaromatic compounds without forming any toxic intermediates. The nitroaromatic co...
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DEMONSTRATION BULLETIN: EX-SITU ANAEROBIC BIOREMEDIATION TECHNOLOGY - TNT - J.R. SIMPLOT COMPANY |
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The J. R. Simplot Ex-Situ Anaerobic Bioremediation System, also known as the J.R. Simplot Anaerobic Biological Remediaton Process (the SABREâ„¢ Process), is a technology designed to ...
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DEMONSTRATION BULLETIN: GAS-PHASE CHEMICAL REDUCTION - ECO LOGIC INTERNATIONAL, INC. |
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The patented Eco Logic Process employs a gas-phase reduction reaction of hydrogen with organic and chlorinated organic compounds at elevated temperatures to convert aqueous and oil...
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DEMONSTRATION BULLETIN: IN-SITU VACUUM EXRACTION: TERRA VAC, INC. |
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This in-situ vacuum extraction technology is a process for the removal and venting of volatile organic compounds (VOCs) from the vadose or unsaturated zone of soils. Often, these ...
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DEMONSTRATION BULLETIN: LOW TEMPERATURE THERMAL AERATION (LTTA®) SYSTEM - CANONIE ENVIRONMENTAL SERVICES, INC. |
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The Low Temperature Thermal Aeration (LTTA®) process was developed by Canonie Environmental Services, Inc. (Canonie), as a treatment system that desorbs organic contaminants from s...
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DEMONSTRATION BULLETIN: NEW YORK STATE MULTI-VENDOR BIOREMEDIATION - ENSR CONSULTING AND ENGINEERING/LARSEN ENGINEERS EX-SITU BIOVAULT |
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The ENSR Biovault Treatment Process is an ex-situ bioremediation technology for the treatment of organic contaminated soils. Contaminated soils placed in specially designed soil pi...
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DEMONSTRATION BULLETIN: PEROX-PURE CHEMICAL OXIDATION TREATMENT |
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Technology Description: The perox-pure™ chemical oxidation treatment technology was developed by Peroxidation Systems, Inc. (PSI), to destroy dissolved organic contaminants ...
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DEMONSTRATION BULLETIN: TEXACO GASIFICATION PROCESS TEXACO, INC. |
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The Texaco Gasification Process (TGP) has operated commercially for nearly 45 years on feeds such as natural gas, liquid petroleum fractions, coal, and petroleum coke. More than 4...
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DEMONSTRATION BULLETIN: UNTERDUCK-VERDAMPFER- BRUNNEN TECHNOLOGY (UVB) VACUUM VAPORIZING WELL - ROY F. WESTON, INC./IEG TECHNOLOGIES CORPORATION |
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The Weston/IEG UVB technology is an in situ groundwater remediation technology that combines air-lift pumping and air stripping to clean aquifers contaminated with volatile organic...
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DEMONSTRATION BULLETIN: ZENOGEMâ„¢ WASTEWATER TREATMENT PROCESS - ZENON ENVIRONMENTAL SYSTEMS |
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Zenon Environmental Systems (Zenon) has developed the ZenoGemâ„¢ process to remove organic compounds from wastewater by integrating biological treatment and membrane-based ultrafiltr...
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DEMONSTRATION OF A CLOSED LOOP REUSE SYSTEM IN A FIBERGLAS TEXTILE PLANT |
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The report describes work done toward providing a totally recycled water system for Owens-Corning's textile fiber manufacturing plant at Anderson, SC. (The work was based on pre-19...
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DEMONSTRATION OF A MAXIMUM RECYCLE, SIDESTREAM SOFTENING SYSTEM AT A PETROCHEMICAL PLANT AND A PETROLEUM REFINERY |
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New full-scale maximum recycle sidestream softening systems at USS Chemicals, Houston, Texas and TOSCO refinery, Bakersfield, California were evaluated as a technology to achieve z...
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DEMONSTRATION OF BULLETIN: DISC TUBEâ„¢ MODULE TECHNOLOGY ROCHEM SEPARATION SYSTEMS, INC. |
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The Rochem Disc Tubeâ„¢ Module System uses membrane separation to treat aqueous solutions ranging from seawater to leachate contaminated with organic solvents. The system uses revers...
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DEMONSTRATION OF CARBON ADSORPTION TECHNOLOGY FOR PETROLEUM DRY CLEANING PLANTS |
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A carbon adsorption system was designed and installed on the exhaust outlet from a dryer at an industrial dry cleaning plant utilizing Stoddard solvent for cleaning purposes. Selec...
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DEMONSTRATION OF FUEL CELLS TO RECOVER ENERGY FROM LANDFILL GAS - PHASE III. DEMONSTRATION TESTS - PHASE IV. GUIDELINES AND DEMONSTRATIONS - VOLUME 2. APPENDICES |
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The report summarizes the results of a four-phase program to demonstrate that fuel cell energy recovery using a commercial phosphoric acid fuel cell is both environmentally sound a...
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DEMONSTRATION OF FUEL CELLS TO RECOVER ENERGY FROM LANDFILL GAS - PHASE III. DEMONSTRATION TESTS - PHASE IV. GUIDELINES AND RECOMMENDATIONS- VOLUME 1. TECHNICAL REPORT |
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The report summarizes the results of a four-phase program to demonstrate that fuel cell energy recovery using a commercial phosphoric acid fuel cell is both environmentally sound a...
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DEMONSTRATION OF THE ENVIRONMENTAL AND DEMAND-SIDE MANAGEMENT BENEFITS OF GRID-CONNECTED PHOTOVOLTAIC POWER SYSTEMS |
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The report gives results of an investigation of the pollutant emission reduction and demand-side management potential of 16 photovoltaic (PV) systems installed across the U.S. in 1...
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DEMONSTRATION OF THE ENVIRONMENTAL AND DEMAND-SIDE MANAGEMENT BENEFITS OF GRID-CONNECTED PHOTOVOLTAIC POWER SYSTEMS SITED ON MILITARY BASES |
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The report gives results of an investigation into the pollutant emission reduction and demand-side management potential of three photovoltaic (PV) systems installed at Ft. Huachuca...
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DEMONSTRATION OF ULTRAFILTRATION AND CARBON ADSORPTION FOR TREATMENT OF INDUSTRIAL LAUNDERING WASTEWATER |
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This study of industrial laundry wastewater treatment by ultrafiltration and activated carbon adsorption has indicated that a consistently high quality product water, potentially r...
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DEMONSTRATION OF VAPOR CONTROL TECHNOLOGY FOR GASOLINE LOADING OF BARGES |
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The report gives results of a program to demonstrate a safe cost-effective way to control gasoline vapors emitted during barge loading. Refrigeration, carbon adsorption, oil absorp...
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DEMONSTRATION PHYSICAL CHEMICAL SEWAGE TREATMENT PLANT UTILIZING BIOLOGICAL NITRIFICATION |
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This demonstration project in a small residential community in Kentucky was initiated to show the feasibility of treating sewage with a physical-chemical type of wastewater treatme...
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DEMONSTRATION PROJECT FOR THE ABATEMENT OF NITROGEN OXIDES EMISSIONS USING REBURN TECHNOLOGY FOR COGENERATION PLANTS IN TAIWAN |
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The report summarizes the key technical results of a joint demonstration project between the U.S. Environmental Protection Agency and the Taiwan Environmental Protection Administra...
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DENITRIFICATION AS AFFECTED BY IRRIGATION FREQUENCY OF A FIELD SOIL |
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The influence of irrigation frequency on denitrification was studied on a Yolo loam field profile at Davis, California. Two carbon treatments were also established by using plots w...
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DENITRIFICATION IN FRINGING SALT MARSHES OF NARRAGANSETT BAY, RHODE ISLAND, USA |
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In the past century, loading of terrestrial inorganic nitrogen to coastal receiving waters has increased dramatically. Salt marshes, because of their location between upland region...
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DENSITY FRACTIONATION OF FOREST SOILS: METHODOLOGICAL QUESTIONS AND INTERPRETATION OF INCUBATION RESULTS AND TURNOVER TIME IN AN ECOSYSTEM CONTEXT |
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Soil organic matter (SOM) is often separated by physical means to simplify a complex matrix into discrete fractions. A frequent approach to isolating two or more fractions is based...
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DEPENDENCY OF POLYCHLORINATED BIPHENYL AND POLYCYCLIC AROMATIC HYDROCARBON BIOACCUMULATION IN MYA ARENARIA ON BOTH WATER COLUMN AND SEDIMENT BED CHEMICAL ACTIVITIES |
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The bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) by the filter-feeding soft-shell clam Mya arenaria was evaluated at three sites ...
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DEPOSITION OF INHALED ULTRAFINE CARBON PARTICLES IN RESTING HEALTHY NONSMOKING ADULTS. (R826781,R827354C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEPOSITION OF ULTRAFINE CARBON PARTICLES IN SUBJECTS WITH ASTHMA. (R826781) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEPOSITION OF ULTRAFINE CARBON PARTICLES IN SUBJECTS WITH ASTHMA. (R827354C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DERMAL EXPOSURE TO METHYL TERT-BUTYL ETHER (MTBE) AND DIBROMOCHLOROMETHANE (DBCM) WHILE BATHING WITH CONTAMINATED WATER |
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The oxygenate methyl tert-butyl ether (MTBE) has been added to gasoline to help meet national ambient air quality standards in those parts of the U.S. that are non-compliant for ca...
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DERMAL, ORAL AND INHALATION PHARMACOKINETICS OF METHYL TERTIARY-BUTYL ETHER (MTBE) IN HUMAN VOLUNTEERS |
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Methyl tertiary butyl ether (MTBE), a gasoline additive used to increase octane and reduce carbon monoxide emissions and ozone precursors, has contaminated drinking water and c...
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DERMAL, ORAL, AND INHALATION PHARMACOKINETICS OF METHYL TERTIARY BUTYL ETHER (MTBE) IN HUMAN VOLUNTEERS |
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Methyl tertiary butyl ether (MTBE), a gasoline additive, used to increase octane and reduce carbon monoxide emissions and ozone precursors has contaminated drinking water leading t...
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DESCRIPTION AND EVALUATION OF ATMOSPHERIC MERCURY SIMULATION USING THE CMAQ MODEL |
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The Community Multiscale Air Quality (CMAQ) modeling system has recently been adapted to simulate the emission, transport, transformation and deposition of atmospheric mercury in t...
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DESICCATION IS A LIMITING FACTOR FOR EELGRASS (ZOSTERA MARINA L.) DISTRIBUTION IN THE INTERTIDAL ZONE OF A NORTHEASTERN P{ACIFIC (USA) ESTUARY |
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Intertidal irradiance, temperature, and aerial exposure
were measured for two years in intertidal Zostera marina
beds located in Yaquina Bay (Newport, OR, USA). These
physical d...
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DESIGN AND CONSTRUCTION OF A MOBILE ACTIVATED CARBON REGENERATOR SYSTEM |
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Activated carbon adsorption has become a standard procedure for the cleanup of contaminated water streams. To facilitate such cleanup at hazardous waste and spill sites, mobile car...
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DESIGN AND PRELIMINARY RESULTS FROM SOIL/LITTER MICROCOSMS |
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Soil/litter microcosms with 'life support' systems were designed to maintain and monitor oxygen consumption, and community carbon dioxide and heat generation over extended time int...
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DESIGN CONSIDERATIONS FOR GAC (GRANULAR ACTIVATED CARBON) TREATMENT OF ORGANIC CHEMICALS |
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Procedures with which to determine preliminary fixed-bed adsorber design calculations for single solutes are described. Correlations are proposed and verified to determine single-s...
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DESIGN FOR TOTAL ORGANICS REMOVAL AT CINCINNATI |
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The industrial Ohio River is the source water for Cincinnati Water Work's (CWW) California surface water treatment plant. s is true for many industrial rivers, a large number of or...
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DESIGN MANUAL: CARBON ADSORPTION |
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A revision to the 1971 original, it presents information on design considerations and descriptions of existing and planned applications of granular activated carbon adsorption in t...
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DESIGN MODEL FOR THE OVERLAND FLOW PROCESS |
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A design model in the 'Process Design Manual, Land Treatment of Municipal Wastewater' was verified as to removal of biochemical oxygen demand (BOD) and further developed to include...
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DESIGNING FIXED-BED ADSORBERS TO REMOVE MIXTURES OF ORGANICS |
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A liquid-phase granular activated carbon (GAC) pilot plant and a full-scale GAG adsorber were designed, built, and operated in order to evaluate their performance for treating a gr...
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DESIGNING FIXED-BED ADSORBERS TO REMOVE MIXTURES OF ORGANICS. |
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A liquid-phase granular activated carbon (GAC) pilot plant and a full-scale GAC adsorber were designed, built, and operated in order to evaluate their performance for treating a gr...
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DESTRUCTION AND REMOVAL OF POHCS (PRINCPAL ORGANIC HAZARDOUS CONSTITUENTS) IN IRON MAKING BLAST FURNACES |
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At least one steel company utilizes organic waste liquids as a heat and carbon content source to partially replace the coke that is used to charge the blast furnaces. The waste liq...
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DESTRUCTION OF AIR EMISSIONS USING CATALYTIC OXIDATION |
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The paper discusses key emission stream characteristics and hazardous air pollutant (HAP) characteristics that affect the applicability of catalytic oxidation as an air pollution c...
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DESTRUCTION OF PCB-CONTAMINATED SOILS WITH A HIGH-TEMPERATURE FLUID-WALL (HTFW) REACTOR |
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The objective of this project is to demonstrate the feasibility of a high temperature fluid-wall (HTFW) Reactor to detoxify biorefractory hazardous substances, as well as soils con...
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DETECTION AND MAPPING OF INSOLUBLE SINKING POLLUTANTS |
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A continuous submersible monitor using a cyclically purged electrical conductivity probe capable of long-term deployment even when buried in sand or silt has been conceived, design...
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DETECTION OF CCL4-INDUCED OXIDATION OF HEPATIC TISSUE IN VIVO BY OXYGEN-18 TRACING |
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Oxygen can become a damaging influence in tissues and cells exposed to environmental pollutants. The paper describes the first application of a new technique for tracing oxygen in ...
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DETECTION OF HIGH MOLECULAR WEIGHT ORGANIC TRACERS IN VEGETATION SMOKE SAMPLES BY HIGH-TEMPERATURE GAS CHROMATOGRAPHY-MASS SPECTROMETRY. (R823990) |
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High-temperature high-resolution gas chromatography
(HTGC) is an established technique for the separation of
complex mixtures of high molecular weight (HMW) compounds
w...
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DETECTION OF PROTEIN ADSORPTION WITH SINGLE WALL CARBON NANOTUBE DEVICE. (R829623) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DETECTION OF WHOLE BODY OXIDATIVE STRESS IN URINE USING OXYGEN-18 LABELING |
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DETECTION OF WHOLE BODY OXIDATIVE STRESS IN URINE USING OXYGEN-18 LABELING. R Slade, J L McKee and G E Hatch. PTB, ETD, NHEERL, ORD, USEPA, Research Triangle Park, NC, USA.
Reli...
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DETERMINATION OF ABSORBED DOSE OF OZONE (O3) IN ANIMALS AND HUMANS USING STABLE ISOTOPE (OXYGEN-18) TRACING |
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A method for the determination of absorbed dose of ozone (03) in animals and humans using oxygen-18 (18)O as a physiological tracer is presented. The experimental aspects of the me...
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DETERMINATION OF AMBIENT AIR HYDROCARBONS IN 39 U.S. CITIES |
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Compliance with the NAAQS for ozone will require the reduction of non-methane organic carbon (NMOC). To this end speciated hydrocarbons were determined for over 800 ambient air sam...
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DETERMINATION OF APPARENT QUANTUM YIELD SPECTRA FOR THE FORMATION OF BIOLOGICALLY LABILE PHOTOPRODUCTS |
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Quantum yield spectra for the photochemical formation of biologically labile photoproducts from dissolved organic matter (DOM) have not been available previously, although they wou...
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DETERMINATION OF BIODEGRADABLE DISSOLVED ORGANIC CARBON USING ENTRAPPED MIXED MICROBIAL CELLS. (R829415E01) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DETERMINATION OF DIOXIN LEVELS IN CARBON REACTIVATION PROCESS EFFLUENT STREAMS |
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A preliminary study was performed to evaluate the potential formation and persistence of tetrachlorodibenzo-p-dioxins (TCDDs) and tetrachlorodibenzo furans (TCDFs) in the effluent ...
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DETERMINATION OF HYDROGEN SULFIDE IN REFINERY FUEL GASES |
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Several widely employed test methods for the iodimetric measurement of hydrogen sulfide in refinery fuel gases are shown to suffer from serious thiol interferences. An absorbing so...
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DETERMINATION OF ORGANIC CONTAMINANTS BY THE GROB CLOSED-LOOP-STRIPPING TECHNIQUE |
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A modified Grob closed-loop-stripping device is currently being used to concentrate organic contaminants from drinking water. The identification and quantification of organic conta...
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DETERMINATION OF ORGANOTIN COMPOUNDS IN ENVIRONMENTAL SAMPLES BY SUPERCRITICAL FLUID EXTRACTION AND GAS CHROMATOGRAPHY WITH ATOMIC EMISSION DETECTION |
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The extraction of six tetraalkyltin and seven ionic organotin compounds from spiked topsoil samples with supercritical carbon dioxide and carbon dioxide modified with 5% methanol w...
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DETERMINATION OF PHENOLS IN ENVIRONMENTALLY RELEVANT MATRICES WITH THE USE OF LIQUID CHROMATOGRAPHY WITH AN ENZYME ELECTRODE DETECTOR |
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A simple and rapid assay using HPLC with a tyrosinase-containing carbon paste electrode (Tyr-CPE) detector is demonstrated for the detection of phenol, p-cresol, p-methoxyphenol,...
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DETERMINATION OF PYRETHROID PESTICIDES IN COMPOSITE DIETARY SAMPLES |
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The U.S. Environmental Protection Agency's National Exposure Research Laboratory (NERL) conducts aggregate exposure studies for determining an individual's exposure to a broad rang...
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DETERMINATION OF SEX HORMONES AND NONYLPHENOL ETHOXYLATES IN THE AQUEOUS MATRIXES OF TWO PILOT-SCALE MUNICIPAL WASTEWATER TREATMENT PLANTS |
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Two analytical methods were developed and refined for the detection and quantitation of two groups of endocrine-disrupting chemicals (EDCs) in the liquid matrixes of two pilot-scal...
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DETERMINATION OF SULFUR DIOXIDE, NITROGEN OXIDES, AND CARBON DIOXIDE IN EMISSIONS FROM ELECTRIC UTILITY PLANTS BY ALKALINE PERMANGANATE SAMPLING AND ION CHROMATOGRAPHY |
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A manual 24-h integrated method for determining SO2, NOx, and CO2 in emissions from electric utility plants was developed and field tested downstream from an SO2 control system. Sa...
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DETERMINATION OF THE ORGANIC MASS TO ORGANIC CARBON RATIO IN IMPROVE SAMPLES. (R831086) |
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The ratio of organic mass (OM) to organic carbon (OC) in PM2.5 aerosols at US national parks in the IMPROVE network was estimated experimentally from solvent extracti...
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DETERMINATION OF TOTAL ORGANIC EMISSIONS FROM HAZARDOUS WASTE COMBUSTORS |
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Determination of "Total Organics" from stack emissions is much more complicated am might be expected, and more published guidance is needed badly. he best scheme available for anal...
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DETERMINATION OF VOLATILE ORGANICS IN INDUSTRIAL AND MUNICIPAL WASTEWATERS |
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This report describes the systematic evaluation of a series of parameters leading to the development of a test procedure for 36 volatile priority pollutants in wastewaters. A study...
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DETERMINING EFFECT OF POLLUTANTS ON THE IMMUNE SYSTEM |
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The purpose of this project was to determine the effects of fly-ash inhalation on the ability of animals to resist infections, neoplastic growth, and the development of hypersensit...
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DETERMINING HEALTH RISKS ASSOCIATED WITH DISINFECTANTS AND DISINFECTION BY-PRODUCTS: RESEARCH NEEDS |
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In order to minimize the levels of potentially toxic disinfectants and disinfection by-products in treated water while maintaining adequate protection against microbiological conta...
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DETERMINING THE EFFECTIVENESS OF AN AFTERBURNER TO REDUCE DIOXINS AND FURANS |
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During reactivation of granular activated carbon (GAC) used in the treatment of municipal water supplies, a potential exists for the release of adsorbed organic compounds or their ...
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DETRITUS PROCESSING AND MINERAL CYCLING IN SEAGRASS 'ZOSTERA' LITTER IN AN OREGON SALT MARSH |
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In estuaries where seagrass beds adjoin marshes, the import and decomposition of seagrass litter in the marsh provide a mechanism for retaining nutrients within the wetlands and pr...
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DEVELOPING A TECHNICAL BASIS FOR REDUCING RISK FROM ARSENIC EXPOSURE IN WATER RESOURCES ACROSS THE UNITED STATES |
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Successful prevention of public exposure to arsenic in ground-water resources impacted by natural sources or contaminated sites is dependent on scientifically-based strategies for ...
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DEVELOPING METAL MEDIATED AND CATALYZED CARBON-CARBON BOND FORMATIONS IN AIR AND WATER. (R828129) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEVELOPMENT AND APPLICATION OF A NEW AIR POLLUTION MODELING SYSTEM. PART III: AEROSOL-PHASE SIMULATIONS (R823186) |
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Result from a new air pollution model were tested against data from the Southern California Air Quality Study (SCAQS) period of 26-29 August 1987. Gross errors for sulfate, sodium,...
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DEVELOPMENT AND APPLICATION OF THE LAKE MICHIGAN EUTRIFICATION MODEL, LM3 |
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Lake Michigan Level 3 (LM3), a high-resolution carbon-based eutrophication model, has been developed in support of a larger study designed to determine contaminant levels in Lake M...
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DEVELOPMENT AND AVAILABILITY OF EQUILIBRIUM PARTITIONING SEDIMENT GUIDELINES (ESGS) FOR NONIONIC ORGANIC CONTAMINANTS, METALS MIXTURES, AND POLYCYCLIC AROMATIC HYDROCARBON (PAH) MIXTURES |
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Collaborative efforts between EPA's Office of Water and Office of Research and Development have resulted in the development of sediment guidelines based on equilibrium partitioning...
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DEVELOPMENT AND EVALUATION OF A QUANTITATIVE ENZYME LINKED IMMUNOSORBENT ASSAY (ELISA) FOR POLYCHLORINATED BIPHENYLS |
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A 96-well, microplate-based enzyme linked immunosorbent assay (ELISA) for the quantitative determination of PCBs (as Aroclors) in soil has been developed and evaluated. he method d...
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DEVELOPMENT AND EVALUATION OF INSTRUMENTATION FOR MEASUREMENT OF INDOOR AIR QUALITY |
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Under its Indoor Air Quality research program, the U.S. Environmental Protection Agency (EPA) has developed several new air monitoring systems for assessment of nonoccupational exp...
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DEVELOPMENT AND TESTING OF THE CBM-IV (CARBON-BOND MECHANISM) FOR URBAN AND REGIONAL MODELING |
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The development and testing of an updated Carbon Bond Mechanism (CBM) is described. The new mechanism, called CBM-IV, was designed for use in EPA's OZIPM-EKMA model. The mechanism,...
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DEVELOPMENT AND VALIDATION OF A METHOD FOR MEASURING EXEMPT VOLATILE ORGANIC COMPOUNDS AND CARBON DIOXIDE IN CONSUMER PRODUCTS |
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The report describes the development and validation of a method for measuring exempt volatile organic compounds (VOCs) and carbon dioxide in consumer products. (NOTE: Ground-level ...
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DEVELOPMENT IN THE SUPERCRITICAL FLUID EXTRACTION OF CHLOROPHENOXY ACID HERBICIDES FROM SOIL SAMPLES |
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Extraction of chlorophenoxy acid herbicides from soil samples with supercritical carbon dioxide as extractand and tetrabutylammonium hydroxide and methyl iodide as derivatization a...
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DEVELOPMENT OF A CARBON-BASED PHYTOPLANKTON MODEL FOR LAKE MICHIGAN AS PART OF A SEQUENCE OF MODELS USED IN THE LAKE MICHIGAN MASS BALANCE PROJECT |
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Different from earlier Great Lakes models, our objective is to link autochthonous carbon production to the toxic chemical concentration within the lake and ultimately to components...
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DEVELOPMENT OF A CHARGED GRID SENSOR FOR AIRBORNE CARBON FIBERS |
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This development addressed the sensing and measurement of carbon fibers moving in ventilating ducts or the exhaust stacks of incinerators. The sensor system utilizes a series of 5 ...
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DEVELOPMENT OF A CHEMICAL KINETIC MECHANISM FOR THE U.S. EPA (ENVIRONMENTAL PROTECTION AGENCY) REGIONAL OXIDANT MODEL |
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A new generalized mechanism for use in EPA's Regional Oxidant Model has been developed. The mechanism is based on the carbon-bond concept in which organics are grouped according to...
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DEVELOPMENT OF A CL-IMPREGNATED ACTIVATED CARBON FOR ENTRAINED-FLOW CAPTURE OF ELEMENTAL MERCURY |
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Efforts to discern the role of an activated carbon's surface functional groups on the adsorption of elemental mercury [Hg(0)] and mercuric chloride demonstrated that chlorine (Cl) ...
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DEVELOPMENT OF A CONTAMINANT TRANSPORT AND FATE MASS BALANCE CALIBRATION MODEL FOR LAKE MICHIGAN MASS BALANCE PROJECT (LMMBP) |
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Lake Michigan Mass Balance Project (LMMBP) was initiated to directly support the development of a lakewide management plan (LaMP) for Lake Michigan. A mass balance modeling approac...
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DEVELOPMENT OF A GUIDANCE MANUAL FOR THE SELECTION AND USE OF SORBENTS FOR LIQUID HAZARDOUS SUBSTANCE RELEASES |
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This study was conducted to provide information for the selection and use of sorbents for cleanup or control of liquid hazardous substances. Literature reviews, sorbent manufacture...
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DEVELOPMENT OF A METHODOLOGY FOR DESIGNING CARBON MONOXIDE MONITORING NETWORKS |
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A methodology is presented for designing a carbon monoxide monitoring network based on the objective of identifying concentrations that exceed the national ambient air quality stan...
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DEVELOPMENT OF A MICROSCALE EMISSION FACTOR MODEL FOR CO FOR PREDICTING REAL-TIME MOTOR VEHICLE EMISSIONS |
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The United States Environmental Protection Agency's (EPA) National Exposure Research Laboratory (NERL) has initiated a project to improve the methodology for modeling human expos...
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DEVELOPMENT OF A RESEARCH STRATEGY FOR INTEGRATED TECHNOLOGY-BASED TOXICOLOGICAL AND CHEMICAL EVALUATION OF COMPLEX MIXTURES OF DRINKING WATER DISINFECTION BYPRODUCTS |
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Chemical disinfection of water is a major public health triumph of the 20th century. Dramatic decreases in both morbidity and mortality of waterborne diseases are a direct result o...
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DEVELOPMENT OF A RESEARCH STRATEGY FOR INTEGRATED TECHNOLOGY-BASED-TOXICOLOGICAL AND CHEMICAL EVALUATION OF COMPLEX MIXTURES OF DRINKING WATER DISINFECTION BYPRODUCTS |
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Chemical disinfection of water is a major public health triumph of the 20th century. Dramatic decreases in both morbidity and mortality of water-borne diseases are a direct re...
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DEVELOPMENT OF A STABLE-ISOTOPE CONSTRAINT SYSTEM FOR ESTUARINE FOOD-WEB MODELS |
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Since the mid 1970's, stable carbon isotopes have been used extensively to address diverse questions related to estuarine carbon cycling. Initially, the isotopic approach was used...
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DEVELOPMENT OF A TEST METHOD FOR THE MEASUREMENT OF GASEOUS METHANOL EMISSIONS FROM STATIONARY SOURCES |
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Methanol was designated under Title III of the Clean Air Act Amendments of 1990 as a pollutant to be regulated. he U.S. EPA, through a contract with Research Triangle Institute, ha...
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DEVELOPMENT OF A VORTEX CONTAINMENT COMBUSTOR FOR COAL COMBUSTION SYSTEMS |
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The report describes the development of a vortex containment combustor (VCC) for coal combustion systems, designed to solve major problems facing the conversion of oil- and gas-fir...
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DEVELOPMENT OF AN ANALYSIS METHOD FOR TOTAL NONMETHANE VOLATILE ORGANIC CARBON EMISSIONS FROM STATIONARY SOURCES |
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The accurate measurement of the total nonmethane volatile organic carbon emissions from stationary sources is critical to characterizing many industrial processes and for regulatin...
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DEVELOPMENT OF COST EQUATIONS FOR GAC SYSTEMS |
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The use of granular activated carbon (GAC) as a broad spectrum adsorbent in the treatment of drinking water has been shown to be effective in removing or reducing concentrations of...
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DEVELOPMENT OF COST-EFFECTIVE NONCARBON SORBENTS FOR HG0 REMOVAL FROM COAL-FIRED POWER PLANTS |
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Noncarbon materials or mineral oxides (silica gel, alumina, molecular sieves, zeolites, and montmorillonite) were modified with various functional groups such as amine, amide, thio...
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DEVELOPMENT OF CRITERIA FOR SITING AIR MONITORING STATIONS |
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This paper reviews relevant research findings for the purpose of establishing a set of uniform national criteria for designating locations of air monitoring stations. Data first ar...
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DEVELOPMENT OF GOOD COMBUSTION PRACTICE FOR MUNICIPAL WASTE COMBUSTORS |
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The paper summarizes the rationale for EPA's good combustion practice (GCP) strategy. OTE: The EPA is developing new air pollution rules for all new and existing municipal waste co...
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DEVELOPMENT OF IMPROVED ANALYTICAL TECHNIQUES FOR DETERMINATION OF ASBESTOS IN WATER SAMPLES |
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Sample preparation techniques were examined for the analysis of asbestos fiber concentrations in water. The carbon-coated Nuclepore technique using a polycarbonate filter proved to...
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DEVELOPMENT OF INSTRUMENTATION FOR CONTINUOUS ON-LINE MONITORING OF NON-METHANE ORGANIC CARBON IN AIR EMISSIONS. (R825511C016) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEVELOPMENT OF INSTRUMENTATION FOR MONITORING CARBON FIBER EMISSION |
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This document reports the design of an electrical instrument which utilizes a variable capacitance in one leg of an R-C feedback network to provide discriminatory information regar...
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DEVELOPMENT OF METHOD 535 FOR THE DETERMINATION OF CHLOROACETANILIDE AND OTHER ACETAMIDE HERBICIDE DEGRADATES IN DRINKING WATER BY SOLID PHASE EXTRACTION AND LIQUID CHROMATOGRAPHY/TANDEM MASS SPECTROMETRY |
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EPA Method 535 has been developed in order to provide a method for the analysis of "Alachlor ESA and other acetanilide degradation products" which are listed on U.S. EPA's 1998 Dr...
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DEVELOPMENT OF METHODS AND TECHNIQUES FOR FINAL TREATMENT OF COMBINED MUNICIPAL AND TEXTILE WASTEWATER INCLUDING SLUDGE UTILIZATION AND DISPOSAL |
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The investigations were carried out on laboratory scale, employing various mixtures of dyeing and municipal wastewaters. The processes studied were: coagulation, ozonization, chlor...
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DEVELOPMENT OF NORMAL HUMAN COLON CELL CULTURES TO IDENTIFY UNREGULATED DISINFECTION BY-PRODUCTS (DBPS) WITH CARCINOGENIC POTENTIAL. |
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Epidemiological studies have linked the consumption of chlorinated surface waters to an increased risk of colorectal cancer. Approximately 600 DBPs, less than half of the total org...
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DEVELOPMENT OF PHYSIOLOGICAL-BASED PHARMACOKINETIC MODEL FOR DERMAL ABSORPTION NAD PENETRATION OF METHYL TERTIARY BUTYL ETHER IN HUMANS |
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Background: Methyl tertiary butyl ether (MTBE) is a volatile organic chemical that is added to gasoline as an octane booster and to reduce vehicular emissions of carbon monoxide. ...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCE-WINTER WEEKDAY, PRODUCT G (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES, PRODUCT D (VERSION 5.0) |
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The 1980 NAPAP Emissions Inventory area source emissions data for the 48 contiguous United States are contained in the data file. Annual emissions of 11 pollutants (SO2, SO4, NOx, ...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-FALL SATURDAY, PRODUCT Q (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-FALL SUNDAY, PRODUCT EE (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-FALL SUNDAY, PRODUCT R (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-FALL WEEKDAY, PRODUCT CC (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-FALL WEEKDAY, PRODUCT P (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SPRING SATURDAY, PRODUCT K (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SPRING SUNDAY, PRODUCT L (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SPRING SUNDAY, PRODUCT Y (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SPRING WEEKDAY, PRODUCT J (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SPRING WEEKDAY, PRODUCT W (VERSION 5.3) |
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In 1980 NAPAP Emissions Inventory 5.3 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to ...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SUMMER SATURDAY, PRODUCT AA (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SUMMER SATURDAY, PRODUCT N (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SUMMER SUNDAY, PRODUCT BB (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SUMMER SUNDAY, PRODUCT O (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SUMMER WEEKDAY, PRODUCT M (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-SUMMER WEEKDAY, PRODUCT Z (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-WINTER SATURDAY, PRODUCT H (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-WINTER SATURDAY, PRODUCT U (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-WINTER SUNDAY, PRODUCT I (VERSION 5.2) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-WINTER SUNDAY, PRODUCT V (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES-WINTER WEEKDAY, PRODUCT T (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: AREA SOURCES. FALL SATURDAY, PRODUCT DD (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: CANADIAN AREA SOURCES, PRODUCT E (VERSION 5.0) |
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The 1980 NAPAP Emissions Inventory area source emissions data for that portion of Canada in the NAPAP study area (east of 125 degrees W. Longitude and south of 60 degrees N. Latitu...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: POINT SOURCES, PRODUCT B (VERSION 5.0) |
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The 1980 NAPAP Emissions Inventory point source emissions data for the 48 contiguous United States are contained in the data file. Annual emissions of 11 pollutants (SO2, SO4, NOx,...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: POINT SOURCES, PRODUCT S (VERSION 5.3) |
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The 1980 NAPAP Emissions Inventory 5.2 area source emissions data for the 48 contiguous United States and Canada (from 50 degrees to 125 degrees W. Longitude and from 25 degrees to...
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DEVELOPMENT OF THE 1980 NAPAP (NATIONAL PRECIPITATION ASSESSMENT PROGRAM) EMISSIONS INVENTORY: CANADIAN POINT SOURCES, PRODUCT C (VERSION 5.0) |
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The 1980 NAPAP Emissions Inventory point source emissions data for that portion of Canada in the NAPAP study area (east of 125 degrees W. Longitude and south of 60 degrees N. Latit...
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DEVELOPMENT OF THE REGIONAL OXIDANT MODEL VERSION 2.1 |
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This report describes improvements that were made to version 2.0 of the Regional Oxidant Model (ROM) in order to create version 2.1. The ROM is an Eulerian grid model that calculat...
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DEVELOPMENT OF THE WESTVACO ACTIVATED CARBON PROCESS FOR SOX RECOVERY AS ELEMENTAL SULFUR. VOLUME I |
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The report gives results of a demonstration (in a 20,000-cfh integral pilot plant) of an all-dry, fluidized-bed process, using activated carbon for recovering SO2 as elemental sulf...
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DEVELOPMENT OF THE WESTVACO ACTIVATED CARBON PROCESS FOR SOX RECOVERY AS ELEMENTAL SULFUR. VOLUME II. APPENDIX |
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The report gives results of a demonstration (in a 20,000-cfh integral pilot plant) of an all-dry, fluidized-bed process, using activated carbon for recovering SO2 as elemental sulf...
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DEVELOPMENT OF TREATMENT AND CONTROL TECHNOLOGY FOR REFRACTORY PETROCHEMICAL WASTES |
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This summary document presents the results of research and development work pertaining to the treatment of biorefractory organic pollutants emanating from petrochemical processing ...
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DEVELOPMENT, CALIBRATION AND APPLICATION OF A CONTAINMENT TRANSPORT AND FATE MASS BALANCE MODEL IN LAKE MICHIGAN, LM2 |
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The Lake Michigan Mass Balance Project (LMMBP) was initiated to support the development of a Lake Wide Management Plan (LaMP) for Lake Michigan. As one of the models in the LMMBP m...
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DEVELOPMENT, REPLICABILITY AND MODELING OF NATURALLY DERIVED MICROCOSMS |
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Experiments with naturally derived, self-developing microcosms were performed to determine the coefficient of variation for dissolved nitrogen and phosphorous, conductivity, dissol...
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DEVELOPMENTAL TOXICITY EVALUATION OF WATER FROM ALTERNATIVE DISINFECTION SCENARIOS |
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NAROTSKY1, M.G., D.S. BEST1, E.H. ROGERS1, A. McDONALD1, Y.M. SEY1, E.S. HUNTER III 1, L.K. TEUSCHLER2, R.J. MILTNER3, T.F. SPETH3, G. RICE2, K.M. SCHENCK3, S.D. RICHARDSON4, M.C. ...
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DEVELOPMENTAL TOXICITY OF PFOS AND PFOA |
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Perfluoroalkyl acids (PFAA) are fully-fluorinated organic chemicals with a carbon backbone (typically varying from C-4 to C-14) and a functional group (usually carboxylic acid or s...
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DEVELOPMENTS IN THE SUPERCRITICAL FLUID EXTRACTION OF CHLOROPHENOXY ACID HERBICIDES FROM SOIL SAMPLES |
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Extraction of chlorophenoxy acid herbicides from soil samples with supercritical carbon dioxide as extractant and tetrabutylammonium hydroxide and methyl iodide as derivatization a...
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DEXTRON TEMPLATED MICROWAVE-ASSISTED SYNTHESIS OF POROUS TITANIUM DIOXIDE |
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An alternative route to the preparation and formation of porous titania powders and carbon coated titania using microwave radiation is described. Inexpensive dextrose was chosen as...
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DEXTROSE-TEMPLATED MICROWAVE-ASSISTED COMBUSTION SYNTHESIS OF SPONGY METAL OXIDES |
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Microwave-assisted combustion synthesis of porous nanocrystalline titania and carbon coated titania is reported using dextrose as template and the product was compared with the one...
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DIAGENETIC OXYGEN EQUIVALENTS MODEL OF SEDIMENT OXYGEN DEMAND |
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The consumption of oxygen in the overlying water by sediments is an important component in the oxygen balance of most natural waters. Conventional practice is to specify the magnit...
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DIAGNOSTIC MODEL EVALUATION FOR CARBONACEOUS PM 2.5 USING ORGANIC MARKERS MEASURED IN THE SOUTHEASTERN U.S. |
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Summertime concentrations of fine particulate carbon in the southeastern United States are consistently underestimated by air quality models. In an effort to understand the cause o...
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DICARBOXYLIC ACID CONCENTRATION TRENDS AND SAMPLING ARTIFACTS |
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Dicarboxylic acids associated with airborne particulate matter were measured during a summer period in Philadelphia that included multiple air pollution episodes. Samples were coll...
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DIEL FLUX OF DISSOLVED CARBOHYDRATE IN A SALT MARSH AND A SIMULATED ESTUARINE ECOSYSTEM |
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The concentrations of total dissolved carbohydrate (TCHO), monosaccharide (MCHO) and polysaccharide (PCHO) were followed over a total of ten diel cycles in a salt marsh and a 13 cu...
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DIESEL AND CARBON PARTICLES ENHANCE HOUSE DUST MITE-INDUCED PULMONARY HYPERSENSITIVITY IN BROWN NORWAY RATS |
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Diesel and Carbon Particles Enhance House Dust Mite-Induced Pulmonary Hypersensitivity in Brown Norway Rats. P. Singh1, M.J. Daniels2, D. Winsett2, J. Richards2, K. Crissman2, M. ...
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DIESEL ENGINE RETROFIT TECHNOLOGY VERIFICATION |
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This presentation wil be given at the EPA Science Forum 2005 in Washington, DC. According to recent estimates, there are approximately 7.9 million heavy-duty diesel trucks and bus...
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DIESEL EXHAUST PARTICLES SUPRESS LPS-STIMULATED PRODUCTION OF PGE2 IN HUMAN ALVEOLAR MACHROPHAGES: ROLE OF P38 MAPK AND ERK PATHWAYS |
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Numerous studies have reported association between exposure to ambient levels of particulate matter (PM) and adverse health effects, which include respiratory and cardiovascular ef...
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DIESEL NOX CONTROL APPLICATION |
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The paper gives results of a project to design, develop, and demonstrate a diesel engine nitrogen oxide (NOx) and particulate matter (PM) control package that will meet the U.S. Na...
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DIESEL PARTICLE GENERATION, CHARACTERIZATION, AND DIRECT ANIMAL EXPOSURE STUDIES |
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Inhalation of diesel exhaust is associated with the development of asthma as well as other adverse health effects. Studies have also demonstrated that diesel exhaust induces pulmo...
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DIETARY RECONSTRUCTION OF AN EARLY TO MIDDLE HOLOCENE HUMAN POPULATION FROM THE CENTRAL CALIFORNIA COAST: INSIGHTS FROM ADVANCED STABLE ISOTOPE MIXING MODELS |
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The inherent sampling and preservational biases of the archaeological record make it difficult
to quantify prehistoric human diets, especially in coastal settings, where populat...
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DIETARY VITAMIN E DEFICIENCY AS A MODIFIER OF THE ASSOCIATIONS OF RESPIRATORY OUTCOMES WITH AIR POLLUTION IN ADOLESCENTS |
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Introduction: We investigated whether low dietary intake of the lipophilic antioxidant vitamin E may act as a modifier of chronic air pollution's associations with respiratory out...
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DIETHANOLAMINE-CARBON DIOXIDE BUFFER PRODUCES ETHYLENE |
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Carbon dioxide concentrates in containers are frequently controlled by using a diethanolamine-bicarbonate buffer. Current studies show that this buffer produces ethylene and that t...
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DIMETHYLTIN DICHLORIDE: INVESTIGATIONS INTO ITS GASTROINTESTINAL ABSORPTION AND TRANSPLACENTAL TRANSFER |
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Dimethyltin dichloride (DMDC) is commonly used as a stabilizer in PVC pipe used for transport of potable water. Learning deficiencies have been observed postnatally in pups from DM...
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DINOFLAGELLATE CYST RECORDS AND HUMAN DISTURBANCE IN TWO NEIGHBORING ESTUARIES, NEW BEDFORD HARBOR AND APPONAGANSETT BAY, MASSACHUSETTS, USA |
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The dinoflagellate cyst records in sediments from New Bedford Harbor and Apponagansett Bay demonstrate sensitivity to environmental change caused by human activity in the watershed...
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DIOXIN EXPOSURE INITIATIVE PUBLICATIONS |
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Following is a listing of published articles that have come out of EPA's |
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DIRECT BIOLOGICAL EFFECTS OF INCREASED ATMOSPHERIC CARBON DIOXIDE LEVELS |
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This report assesses the likely biological nonclimatic, direct effects of carbon dioxide (CO2) on terrestrial and aquatic ecosystems and on human health. It summarizes the current ...
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DIRECT CARBON MONOXIDE PHOTOPRODUCTION FROM PLANT MATTER |
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Initial studies to quantify direct carbon monoxide photoproduction from several plant species are reported. n addition to measuring CO emissions from live plant leaves, emission ra...
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DISASSOCIATION OF CARBON DISULFIDE-INDUCED DEPRESSION OF FLASH EVOKED POTENTIAL PEAK N166 AMPLITUDE AND NOREPINEPHRINE LEVELS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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DISCOVERY AND ELIMINATION OF DIOXINS FROM A CARBON REACTIVATION PROCESS |
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In a project done to ensure an environmentally acceptable granular activated carbon (GAC) adsorption and reactivation system--to be sure that chlorinated dibenzo-p-dioxins (CDD's) ...
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DISINFECTION BY-PRODUCT CONTROL THROUGH BIOLOGICAL FILTRATION |
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Disinfection by-product (DBP) control through biofiltration is defined as the removal of DBP precursor mateterial (PM) by bacteria attached to the filte nedia. The PM consists of d...
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DISINFECTION BY-PRODUCT FORMATION BY ALTERNATIVE DISINFECTANTS AND REMOVAL BY GRANULAR ACTIVATED CARBON |
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The effects of the use of the alternative disinfectants on the formation of halogenated disinfection by–products (DBPs) including total organic halide, trihalomethanes, haloa...
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DISINFECTION BY-PRODUCT FORMATION BY ALTERNATIVE DISINFECTANTS AND REMOVAL BY GRANULAR ACTIVATED CARBON |
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The effects of the use of the alternative disinfectants on the formation of halogenated disinfection by-products (DBPS) including total organic halide, trihalomethanes, haloacetic ...
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DISINFECTION BYPRODUCTS: THE NEXT GENERATION |
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Disinfection of drinking water is rightly hailed as a major public health triumph of the 20th Century. Before widespread disinfection of drinking water in the U.S. and Europe, mil...
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DISINFECTION OF BACTERIA ATTACHED TO GRANULAR ACTIVATED CARBON |
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Heterotrophic plate count bacteria, coliform organisms, and pathogenic microorganisms attached to granular activated carbon (GAC) particles were examined for their susceptibility t...
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DISPERSION OF POLLUTANTS NEAR HIGHWAYS - EXPERIMENTAL DESIGN AND DATA ACQUISITION PROCEDURES |
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The major emphasis of this investigation centered on the collection of particulate and gaseous pollutant data, and detailed micrometeorological data in a non-urban setting adjacent...
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DISPERSION POLYMERIZATION OF 1-VINYL-2-PYRROLIDONE IN SUPERCRITICAL CARBON DIOXIDE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DISPERSION POLYMERIZATION OF 2-HYDROXYETHYL METHACRYLATE IN SUPERCRITICAL CARBON DIOXIDE. (R826115) |
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Herein we report a successful dispersion polymerization of 2-hydroxyethyl methacrylate (HEMA) in a carbon dioxide continuous phase with a block copolymer consisting of polystyrene ...
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DISPERSION POLYMERIZATION OF ACRYLONITRILE IN SUPERCRITICAL CARBON DIOXIDE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DISPERSION POLYMERIZATION OF STYRENE IN SUPERCRITICAL CARBON DIOXIDE UTILIZING RANDOM COPOLYMERS INCLUDING FLUORINATED ACRYLATE FOR PREPARING MICRON-SIZE POLYSTYRENE PARTICLES. (R826115) |
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The dispersion polymerization of styrene in supercritical CO2 utilizing CO2-philic random copolymers was investigated. The resulting high yield of polystyrene...
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DISPERSION POLYMERIZATIONS OF METHYL METHACRYLATE IN SUPERCRITICAL CARBON DIOXIDE: THE INFLUENCE OF HELIUM CONCENTRATION ON PARTICLE SIZE AND PARTICLE SIZE DISTRIBUTION. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DISPERSION POLYMERIZATIONS OF STYRENE IN CARBON DIOXIDE STABILIZED WITH POLY(STYRENE-B-DIMETHYLSILOXANE). (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DISRUPTION OF THYROID HORMONE HOMEOSTASIS BY PERFLUROALKYL ACIDS |
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Perfluoroalkyl acids (PFAA) are man-made chemicals found ubiquitously in humans and wildlife; the major representatives of these are those with an 8-carbon chain (C-8, perfluorooct...
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DISSOLVED FREE AMINO ACIDS, COMBINED AMINO ACIDS, AND DNA AS SOURCES OF CARBON AND NITROGEN TO MARINE BACTERIA |
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Utilization of naturally-occurring dissolved free and combined mino cids (DFAA and DCAA) and dissolved DNA FD-DNA) was studied in batch cultures of bacteria from 2 shallow marine e...
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DISSOLVED ORGANIC CARBON (DOC) CONCENTRATIONS IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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Dissolved organic matter (DOM) supports microbial activity and contributes to transport of N and P in streams. We have studied the impact of land uses on dissolved organic carbon (...
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DISSOLVED ORGANIC CARBON AND DISSOLVED CARBON DIOXIDE CONCENTRATIONS AND EXPORT IN GEORGIA PIEDMONT HEADWATER STREAMS |
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The South Fork Broad River (SFBR) drains about 550 km2 of the Georgia Piedmont. The SFBR watershed is primarily rural and undeveloped although the human population increased by ab...
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DISSOLVED ORGANIC CARBON AND SULFATE SORPTION BY SPODOSOL MINERAL HORIZONS |
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Dissolved organic carbon (DOC) can influence the mobility and sorption of inorganic solutes in soils. hrough DOC sorption, surface sites can be inhibited thus preventing the retent...
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DISSOLVED ORGANIC CARBON AS AN INDICATOR OF THE SCALE OF LANDSCAPE INFLUENCE ON NORTH TEMPERATE LAKES AND RIVERS. (U915404) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DISSOLVED ORGANIC MATTER AND METALS: EFFECTS OF PH ON PARTITIONING |
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Eighteen Dutch soils were extracted in aqueous solutions at varying pH. Extracts were analyzed for Cd, Cu, Ni, Pb, and Zn by ICP-AES. Extract dissolved organic carbon (DOC) was fra...
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DISSOLVED ORGANIC MATTER AND METALS: EFFECTS OF PH ON PARTITIONING NATURAL ORGANIC MATTER IN SOILS AND WATER |
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Eighteen Dutch soils were extracted in aqueous solutions at varying pH. Extracts were analyzed for Cd, Cu, Ni, Pb, and Zn by ICP-AES. Extract dissolved organic carbon (DOC) was fra...
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DISTRIBUTED SEQUESTRATION AND RELEASE OF PAHS IN WEATHERED SEDIMENT: THE ROLE OF SEDIMENT STRUCTURE AND ORGANIC CARBON PROPERTIES. (R825303) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DISTRIBUTION AND COMPOSITION OF DISSOLVED AND PARTICULATE ORGANIC CARBON IN NORTHERN SAN FRANCISCO BAY DURING LOW FRESHWATER FLOW CONDITIONS |
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The distribution of dissolved and particulate organic matter was studied in northern San Francisco Bay on seven dates during declining flow conditions from April to October 1996. M...
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DISTRIBUTION AND COMPOSITION OF DISSOLVED AND PARTICULATE ORGANIC CARBON IN NORTHERN SAN FRANCISCO BAY DURING LOW FRESHWATER FLOW CONDITIONS |
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The distribution of organic matter was studied in northern San Francisco Bay monthly through spring and summer 1996 along the salinity gradient from the Sacramento River to Central...
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DISTRIBUTION AND COMPOSITION OF DISSOLVED AND PARTICULATE ORGANIC CARBON IN NORTHERN SAN FRANCISCO BAY DURING LOW FRESHWATER FLOW CONDITIONS (POSTER SESSION) |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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DISTRIBUTION OF CARDIAC OUTPUT DURING DIURNAL CHANGES IN ACTIVITY IN RATS |
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The hepatotoxicity of carbon tetrachloride and chloroform in rats is increased when exposure occurs during the dark part of the lighting cycle when rats are more active. ats are us...
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DISTRIBUTION OF PARAMETERS DETERMINING BIOAVAILABILITY OF METALS IN EUROPEAN SOILS |
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As part of a program to develop a predictive model of bioavailability and toxicity of copper in soils to terrestrial organisms, 19 soils from 9 countries of the EU were collected a...
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DISTRIBUTION OF TRACE ELEMENT EMISIONS FROM THE LIQUID INJECTION INCINERATOR COMBUSTION RESEARCH FACILITY |
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A series of tests was conducted at EPA's Combustion Research Facility (CRF) to investigate the fate of volatile trace elements in liquid injection hazardous waste incineration. In ...
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DISTRIBUTION OF VOLATILE ORGANIC HYDROCARBONS AND ALDEHYDES DURING THE IACP (INTEGRATED AIR CANCER PROJECT) BOISE, IDAHO RESIDENTIAL STUDY |
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The U.S. EPA's Integrated Air Cancer Project (IACP) conducted a field study in Boise, Idaho during November 1986 - February 1987. As part of the study, samples were collected in te...
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DISTURBANCE AND CLIMATE EFFECTS ON CARBON STOCKS AND FLUXES ACROSS WESTERN OREGON USA. (R828309) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DIURNAL VARIATIONS IN CARBON MONOXIDE CONCENTRATIONS, TRAFFIC COUNTS AND METEOROLOGY |
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Although pollutant emission patterns play important roles, they cannot adequately explain the diurnal variations in carbon monoxide concentrations found in urban areas. In this stu...
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DIURNAL VARIATIONS IN TRAFFIC FLOW AND CARBON MONOXIDE CONCENTRATIONS |
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Traffic count and carbon monoxide (CO) data for January and July from three states are compared in order to reveal any diurnal variations in the two measurements. The diurnal patte...
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DNA SORPTION TO SOILS AND SEDIMENTS |
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Deoxyribonucleic acid (DNA) adsorption of five soils, an acid-washed sand, and a lake sediment was investigated. ll DNA at environmentally relevant concentrations was adsorbed by s...
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DOES DISSOLVED INORGANIC CARBON PLAY A ROLE IN ARSENIC MOBILIZATION? |
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Recent experimental results provide evidence that dissolved inorganic carbon plays a direct role in mobilizing arsenic in anoxic aquatic environments. This hypothesis is partially...
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DOES SOIL CO2 EFFLUX ACCLIMATIZETO ELEVATED TEMPERATURE AND CO2 DURING LONG-TERM TREATMENT OF DOUGLAS-FIR SEEDLINGS? |
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We investigated the effects of elevated soil temperature and atmospheric CO2 efflux (SCE) during the third an fourth years of study. We hypothesized that elevated temperature woul...
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DOES TERRESTRIAL CARBON SUBSIDIZE PRODUCTION OF ESTUARINE FISH LARVAE? |
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The research presented demonstrates the important role that terrestrial ecosystems can play in coastal food webs. We show that terrestrial carbon subsidizes the tidal freshwater a...
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DOWNSTREAM PATTERNS IN C:N:P AND SEDIMENT MICROBIAL ENZYME ACTIVITY IN THE MISSOURI, UPPER MISSISSIPPI AND OHIO RIVERS |
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We compare our results with previous studies of nutrients and stoichiometry in these rivers. We link EEA to regional-scale anthropogenic stressors, and suggest that microbial anzy...
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DREDGE SPOILS AND SEWAGE SLUDGE IN THE TRACE METAL BUDGET OF ESTUARINE AND COASTAL WATERS |
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Many reactive pollutants, such as Zn, Cu, Pb, Cs-137, Pu-239, 240 and PCB's appear to be transported and accumulated together in association with fine-grained particles in the Huds...
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DRINKING WATER SUPPLY MANAGEMENT: AN INTERACTIVE APPROACH |
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In February 1977, a massive discharge of carbon tetrachloride into the Kanawha River in West Virginia threatened much of the Ohio River Valley with contaminated drinking water pote...
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DRINKING WATER TREATMENT USING SLOW SAND FILTRATION |
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Recent re-interest in slow sand filtration was brought about by the needs for small communities to install treatment technologies that are effective, less costly, and easier to ope...
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DUSTS AND RESIDUES FROM MACHINING AND INCINERATING GRAPHITE/EPOXY COMPOSITES. A PRELIMINARY STUDY |
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Preliminary laboratory experiments were carried out to obtain some information on the nature of potential carbon fiber emissions resulting from the machining and incineration of gr...
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DYNAMICS OF CARBON STORAGE IN SOILS AND DETRITUS ACROSS CHRONOSEQUENCES OF DIFFERENT FOREST TYPES IN THE PACIFIC NORTHWEST, USA. (R828309) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DYNAMOMETER TESTING OF ON-ROAD VEHICLES FROM THE LOS ANGELES IN-USE EMISSIONS STUDY |
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One part of the CARB/EPA coordinated In-Use Automobile Emissions field study of 1991 carried out in the Los Angeles area was to examine the operation and emissions characteristics ...
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Demonstration of ISCO Treatment of a DNAPL Source Zone at Launch Complex 34 in Cape Canaveral Air Station, FL |
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The Interagency DNAPL Consortium (IDC) was formally established in 1999 by the U.S. Department of Energy (DOE), U.S. Environmental Protection Agency (U.S. EPA), Department of Defen...
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Development of a Gas Chromatography/Mass Spectrometry Method for the Analysis of the Solvent Stabilizer 1,4-Dioxane in Drinking Water |
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The solvent stabilizer 1,4-dioxane was named to the latest draft Drinking Water Contaminant Candidate List (CCL3) in February 2008 by the United States Environmental Protection Age...
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Development of normal human colon cell cultures to identify priority unregulated disinfection byproducts with a carcinogenic potential |
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Epidemiological studies have linked the consumption of chlorinated surface waters to an increased risk of colorectal cancer. At present ~600 DBPs have been identified as the major...
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Distribution of Boreal Toad Populations in Relation to Estimated UV-B Dose in Glacier National Park, Montana, USA |
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This work provides information on amphibian distributions as well as the range of UV-B exposure in mountain habitats, and will be of use to scientists interested in tracking change...
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Does Terrestrial Carbon Subsidize Production of Estuarine Fish Larvae? |
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The study shows important connections between terrestrial, riverine and marine energy sources in supporting larval fish production across an estuarine ecosystem in Chesapeake Bay, ...
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Does encouraging the use of wetlands in water quality trading programs make economic sense? |
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Water quality trading has grown in popularity and scope in recent years owing to its potential as a flexible, low-cost way to achieve nutrient reduction goals. Policy makers are i...
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EARLY INDICATORS OF NITRATE STRESS; EFFECTS TO ECOSYSTEMS OF CHRONIC EXPOSURE TO LOW DOSES OF BIOAVAILABE NITROGEN |
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Throughout the eastern United States, from the Front Range of the Rocky Mountains to the Atlantic Ocean, bioavailable nitrogen has been falling in the rain since the industrial rev...
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EARLY INDICATORS OF NITRATE STRESS; EFFECTS TO ECOSYSTEMS OF CHRONIC EXPOSURE TO LOW DOSES OF BIOAVAILABLE NITROGEN |
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Throughout the eastern United States, from the Front Range of the Rocky Mountains to the Atlantic Ocean, bioavailable nitrogen has been falling in the rain since the industrial rev...
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EAST VERSUS WEST IN THE US: CHEMICAL CHARACTERISTICS OF PM 2.5 DURING THE WINTER OF 1999 |
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The chemical composition of PM2.5 was investigated at four sites (Rubidoux, CA, Phoenix, AZ, Philadelphia, PA, and RTP, NC) in January and February of 1999. Three samplers were use...
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EAST VS. WEST IN THE US: CHEMICAL CHARACTERISTICS OF PM2.5 DURING THE WINTER OF 1999 |
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The chemical composition of PM2.5 was investigated at four sites (Rubidoux, CA, Phoenix, AZ, Philadelphia, PA, and RTP, NC) in January and February of 1999. Three samplers were use...
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EASTERN LAKE SURVEY-PHASE II AND NATIONAL STREAM SURVEY-PHASE I PROCESSING LABORATORY OPERATIONS REPORT |
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The National Surface Water Survey was designed to characterize surface water chemistry in regions of the United States believed to be potentially sensitive to acidic deposition. Th...
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ECOLOGICAL RISK ASSESSMENT OF ALFALFA (MEDICAGO VARIA L.) GENETICLALY ENGINEERED TO EXPRESS A HUMAN METALLOTHIONEIN (HMT) GENE |
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The objectives of these studies were two-fold: (1) to determine efficacy of low and high expression hMT gene constructs by assessing accumulation of Cu in shoots of parental and tr...
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ECOLOGICAL STUDIES AND MATHEMATICAL MODELING OF 'CLADOPHORA' IN LAKE HURON: 3. THE DEPENDENCE OF GROWTH RATES ON INTERNAL PHOSPHOROUS POOL SIZE (JOURNAL VERSION) |
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The relationship between growth rate and internal phosphorus pool size was examined using field populations of Cladophora golmerata from Lake Huron. Algal samples, representing a r...
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ECOMAT INC. BIOLOGICAL DENIFTRICATION PROCESS; SITE TECHNOLOGY CAPSULE |
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EcoMat, Inc. of Hayward, California (EcoMat) has developed an ex situ anoxic biofilter biodenitrification (BDN) process. The process uses specific biocarriers and bacteria to trea...
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ECOMAT INC. BIOLOGICAL DENITRIFICATION PROCESS, ITER |
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EcoMat, Inc. of Hayward, California (EcoMat) has developed an ex situ anoxic biofilter biodenitrification (BDN) process. The process uses specific biocarriers and bacteria to trea...
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ECONOMIC ANALYSIS OF TREATMENT TECHNOLOGIES TO ACHIEVE VOC (VOLATILE ORGANIC CHEMICALS) REMOVAL TO SAFE LEVELS |
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In the VOC regulations both Granular Activated Carbon (GAC) and Packed Tower Aeration (PTA) have been designated as Best Available Treatment. DWRD has performed a great deal of res...
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ECONOMIC GROWTH ANALYSIS SYSTEM: REFERENCE MANUAL |
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The two-volume report describes the development of, and provides information needed to operate, a prototype Economic Growth Analysis System (E-GAS) modeling system. he model will b...
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ECONOMIC GROWTH ANALYSIS SYSTEM: REFERENCE MANUAL - VERSION 2.0 |
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The two-volume report describes the development of and provides information needed to operate, the Economic Growth Analysis System (E-GAS) Version 2.0 model. he model will be used ...
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ECONOMIC GROWTH ANALYSIS SYSTEM: USER'S GUIDE |
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The two-volume report describes the development of, and provides information needed to operate, a prototype Economic Growth Analysis System (E-GAS) modeling system. he model will b...
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ECONOMIC GROWTH ANALYSIS SYSTEM: USER'S GUIDE - VERSION 2.0 |
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The two-volume report describes the development of and provides information needed to operate, the Economic Growth Analysis System (E-GAS) Version 2.0 model. he model will be used ...
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EDUCATION LEVEL IS GREATEST RISK-FACTOR IN CARBON MONOXIDE POISONING |
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Carbon monoxide (CO) is a toxic by-product of the combustion of fossil fuels. In confined spaces, inefficient combustion sources, such as furnaces, stoves, kerosene heaters and aut...
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EFFECT OF 2 PERCENT VENOUS CARBOXYHEMOGLOBIN ON EXERCISE-INDUCED ANGINA PECTORIS |
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In a double-blind, randomized, crossover study, 14 patients with angina pectoris who breathed carbon monoxide 50 ppm for 1 hour to raise the mean venous carboxyhemoglobin from 1.09...
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EFFECT OF A SUBSURFACE SEDIMENT ON HYDROLYSIS OF HALOALKANES AND EPOXIDES |
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Neutral and base-catalyzed hydrolyses of isopropyl bromide, 1,1,2,2-tetrachloroethane, 1,1,1-trichloroethane, and ethylene dibromide were studied in pure water and in barely satura...
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EFFECT OF ACID TREATMENT ON DISSOLVED ORGANIC CARBON RETENTION BY A SPODIC HORIZON |
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Processes involving the movement of organic substances in forest soils are not well understood. This study was conducted to examine the role of acidic inputs on dissolved organic c...
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EFFECT OF AMBIENT LIGHT, AERIAL EXPOSURE, AND SEASON ON EELGRASS (ZOSTERA MARINA) METRICS IN A NORTHEAST PACIFIC (USA) ESTUARY |
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Although light is the principal factor controlling the lower depth limit of seagrasses, little attention has been given to how reduced winter lighting may affect intertidal plants....
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EFFECT OF ANAEROBIOSIS ON FILTER MEDIA POLLUTANT RETENTION |
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This paper presents the results of experiments conducted to determine if four potential filter media (sand, activated carbon, peat moss, and compost) could retain previously-trappe...
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EFFECT OF ANAEROBIOSIS ON FILTER MEDIA POLLUTANT RETENTION |
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One of the primary problems with downflow filtration of stormwater runoff is the clogging of the filter prior to the medium's exhaustion of its chemical capacity. Upflow filtration...
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EFFECT OF BACKGROUND ORGANIC MATTER FROM SURFACE WATERS ON THE ACTIVATED CARBON ADSORPTION OF SPECIFIC ORGANIC COMPOUNDS |
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A study was conducted to evaluate how background organic matter found in surface waters can affect the adsorption kinetics and capacity of cis-1,2-dichloroethene. he study further ...
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EFFECT OF CARBON TETRACHLORIDE TREATMENT ON URINE FLOW RATE OF THE RAINBOW TROUT, 'SALMO GAIRDNERI' |
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Urine flow rate (UFR) of rainbow trout was measured as an assessment of water balance after treatment with a single ip dose of CC14 (2.0 ml/kg). CC14 produced an oliguria or anuria...
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EFFECT OF COLLISIONAL LIFETIME IN OPTOACOUSTIC DETECTION OF POLLUTANT GASES |
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The optoacoustic technique shows promise for pollution monitoring due to its small size and high sensitivity. This technique is fundamentally different from most spectroscopy in th...
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EFFECT OF CONTAMINANT AND ORGANIC MATTER BIOAVAILABILITY ON THE MICROBIAL DEHALOGENATION OF SEDIMENT-BOUND CHLOROBENZENES. (R825513C007) |
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The extent of reductive dechlorination occurring in contaminated, estuarine sediments was investigated. Contaminant and organic matter bioavailability and their effect on the re...
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EFFECT OF DISSOLVED OXYGEN ON PHENOLS BREAKTHROUGH FROM GAC ADSORBERS |
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This study demonstrates that molecular oxygen plays and important role in the adsorption of organic compounds from water by activated carbon. t was determined that the adsorptive c...
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EFFECT OF DISSOLVED OXYGEN ON PHENOLS BREAKTHROUGH FROM GAC ADSORBERS |
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This study demonstrates that molecular oxygen plays an important role in the adsorption of organic compounds from water by activated carbon. It was determined that the adsorptive...
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EFFECT OF GAC CHARACTERISTICS ON ADSORPTION OF ORGANIC POLLUTANTS |
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The impact of the characteristics of granular activated carbon (GAC) on adsorption capacity and on the potential for polymerization of phenolic compounds on the surface of GAC in t...
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EFFECT OF GAVAGE VEHICLE ON HEPATOTOXICITY OF CARBON TETRACHLORIDE IN CD-1 MICE: CORN OIL VERSUS TWEEN-60 AQUEOUS EMULSION (JOURNAL VERSION) |
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The investigation was conducted to evaluate the effect of corn oil gavage on the subchronic hepatotoxicity of carbon tetrachloride (CCl(4)). Male and female CD-1 mice were gavaged ...
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EFFECT OF HUMIDITY ON CARBON ADSORPTION PERFORMANCE IN REMOVING ORGANICS FROM CONTAMINATED AIR STREAMS |
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The paper describes the configuration of EPA's inhouse, automated, adsorption laboratory, operation of the laboratory, experimental design for evaluating single-component adsorptio...
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EFFECT OF INHALED ULTRAFINE CARBON PARTICLES ON THE ALLERGIC AIRWAY RESPONSE IN RAGWEED SENSITIZED DOGS. (R826442) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECT OF IRRADIANCE SPECTRA ON THE PHOTOINDUCED TOXICITY OF THREE POLYCYCLIC AROMATIC HYDROCARBONS |
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Photoinduced toxicity of polycyclic aromatic hydrocarbons (PAHs) is dependent on the concentration of compounds present and the dose of light received. Of the light present, only t...
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EFFECT OF LOADING DUST TYPE ON THE FILTRATION EFFICIENCY OF ELECTROSTATICALLY CHARGED FILTERS |
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The paper gives results of an evaluation of the effect of loading dust type on the filtration efficiency of electrostatically charged filters. Three types of filters were evaluate...
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EFFECT OF LOW LEVEL CARBON MONOXIDE ON COMPENSATORY TRACKING AND EVENT MONITORING |
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Experiments by Putz et al. concerning the effect of carbon monoxide (CO) exposure on compensatory tracking and monitoring in healthy young men were replicated. Task and procedural ...
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EFFECT OF MANAGEMENT PRACTICES ON THE SOIL MICROBIAL COMMUNITY IN AGRICULTURAL AND NATIVE SYSTEMS IN BRAZIL |
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Increase in agricultural practices in the Cerrado (tropical savannah) and Amazon regions in Brazil is causing drastic changes in the nutrient and carbon cycling of native areas. B...
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EFFECT OF MOISTURE ON ADSORPTION OF ELEMENTAL MERCURY BY ACTIVATED CARBON |
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The paper discusses experiments using activated carbon to capture elemental mercury (Hgo), and a bench-scale dixed-bed reactor and a flow reactor to determine the role of surface m...
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EFFECT OF MOLECULAR OXYGEN OF THE SCALEUP OF GAC ADSORBERTS |
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A rapid small-scale column test (RSSCT), designed according to the assumption of no dependency of the intraparticle surface diffusion coefficient on the activated carbon particle s...
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EFFECT OF MOLECULAR OXYGEN ON ADSORPTIVE CAPACITY AND EXTRACTION EFFICIENCY OF GRANULATED ACTIVATED CARBON FOR THREE ORTHO-SUBSTITUTED PHENOLS |
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Adsorptive capacity of granular activated carbon (GAC) for several organic compounds was found to be strongly influenced by the presence of molecular oxygen. his influence is manif...
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EFFECT OF MOLECULAR OXYGEN ON THE ACTIVATED CARBON ADSORPTION OF NATURAL ORGANIC MATTER IN OHIO RIVER WATER |
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NO ABSTRACT PROVIDED...
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EFFECT OF NATURAL DISSOLVED ORGANIC MATTER PRELOADING AND GRANULAR ACTIVATED CARBON SURFACE ACIDITY ON UPTAKE OF TRICHLOROETHYLENE. (R828157) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECT OF NON-TARGET ORGANICS ON ORGANIC CHEMICAL TRANSPORT |
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To improve our standard of living, man has synthesized organic compounds for use in products considered essential for life. These compounds are having and will continue to have a s...
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EFFECT OF OXIDATION ON THE MICROSTRUCTURE OF CARBON BLACKS. (R824970) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECT OF OZONATED WATER ON THE ASSIMILABLE ORGANIC CARBON AND COLIFORM GROWTH RESPONSE VALUES AND ON PATHOGENIC BACTERIA SURVIVAL |
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The assimilable organic carbon (AOC) and coliform growth response (CGR) are bioassays used to determine water quality. AOC and CGR are better indexes in determining whether water c...
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EFFECT OF OZONE ON DIESEL EXHAUST PARTICLE TOXICITY |
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Ambient particulate matter (PM) concentrations have been associated with mortality and morbidity. Diesel exhaust particles (DEP) are present in ambient urban air PM. Coexisting wit...
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EFFECT OF PRELOADING ON THE SCALE-UP OF GAC MICROCOLUMNS |
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A previously proposed microcolumn scale-up procedure is evaluated. Scale-up assumptions dealing with equal capacities in microcolumnS and field columns are focused On in an ef fort...
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EFFECT OF ROUTE AND PATTERN OF EXPOSURE ON THE PHARMACOKINETICS AND ACUTE HEPATOTOXICITY OF CARBON TETRACHLORIDE |
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The objectives of this study were to evaluate the influence of both route and pattern of exposure on the pharmacokinetics and target organ toxicity of a common VOC, carbon tetrachl...
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EFFECT OF SEDIMENT ORGANIC CARBON ON SURVIVAL OF HYALELLA AZTECA EXPOSED TO DDT AND ENDRIN |
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Sediment toxicity tests were conducted with the freshwater amphipod Hyalella azteca using sediments ranging in total organic carbon (TOC) concentration from 3 to 11% and spiked wit...
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EFFECT OF SEPARATION PROCESSES ON THE FORMATION OF BROMINATED THMS |
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Separation treatment processes are being investigated as a way to control the formation of disinfection by-products (DBPs) in finished waters. hese processes remove natural organic...
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EFFECT OF SOOT, TEMPERATURE AND RESIDENCE TIME ON PCDD/F FORMATION |
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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are formed during thermal processes in the presence of fly ash that acts as an oxidation catalys...
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EFFECT OF TEMPERATURE ON THE C ISOTOPIC VALUE OF MICROBIAL LIPIDS APPLIED TO DETERMINE C USAGE IN MICROBIAL COMMUNITIES |
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The combination of compound specific stable isotopic analysis with phospholipid fatty acid (PLFAS) analysis is useful in determining the source of organic carbon used by groups of ...
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EFFECT OF TRENDS IN TILLAGE PRACTICES ON EROSION AND CARBON CONTENT OF SOILS IN THE U.S. CORN BELT |
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The EPIC model was used to simulate soil erosion and soil carbon content at 100 randomly selected sites in the US corn belt. our management scenarios were run for 100 years: (1) cu...
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EFFECT OF UV IRRADIATION ON ORGANIC MATTER EXTRACTED FROM TREATED OHIO RIVER WATER STUDIED THROUGH THE USE OF ELECTROSPRAY MASS SPECTROMETRY |
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Ohio River water was treated by settling, sand filtration, and granular activated carbon filtration. It was then irradiated by low pressure (monochromatic) and medium pressure (pol...
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EFFECT OF VAPOR-PHASE BIOREACTOR OPERATION ON BIOMASS ACCUMULATION, DISTRIBUTION, AND ACTIVITY. (R826168) |
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Excess biomass accumulation and activity loss in vapor-phase bioreactors (VPBs) can lead to unreliable long-term operation. In this study, temporal and spatial variations in biomas...
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EFFECT ON CARBON MONOXIDE LEVELS IN MOBILE HOMES USING UNVENTED KEROSENE HEATERS FOR RESIDENTIAL HEATINGS |
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Carbon monoxide (Co) emission levels were continuously monitored in 8 mobile trailer homes less than 10 years old . These homes were monitored in an US EPA study on indoor air qual...
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EFFECTIVE RISK MANAGEMENT OF ENDOCRINE DISRUPTING CHEMICALS USING DRINKING WATER TREATMENT PROCESSES |
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The conventional drinking water treamtent processes of coagulation, flocculation, and filtration as well as specialized treatment processes have been examined for their capacity to...
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EFFECTIVENESS OF ACTIVATED CARBON FOR REMOVAL OF TOXIC AND/OR CARCINOGENIC COMPOUNDS FROM WATER SUPPLIES |
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This research addressed quantification of the performance of fixed-bed granular activated carbon processes for treatment of public water supplies. It included evaluation of the ads...
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EFFECTS OF 1,3-BUTADIENE, ISOPRENE, AND THEIR PHOTOCHEMICAL DEGRADATION PRODUCTS ON HUMAN LUNG CELLS |
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Because of potential exposure both in the workplace and from ambient air, the known carcinogen 1,3-butadiene (BD) is considered a priority hazardous air pollutant. BD and its 2-met...
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EFFECTS OF 4% AND 5% CARBOXYHEMOGLOBIN ON ARRHYTHMIA PRODUCTION IN PATIENTS WITH CORONARY ARTERY DISEASE |
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Sudden death frequently occurs from coronary artery disease. t almost always results from cardiac arrhythmias and is often the first and only clinically recognizable manifestation ...
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EFFECTS OF A LIGNIN PEROXIDASE-EXPRESSING RECOMBINANT STREPTOMYCES LIVIDANS TK23.1 ON BIOGEOCHEMICAL CYCLING AND THE NUMBERS AND ACTIVITIES OF MICROORGANISMS IN SOIL |
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A recombinant actinomycete, Streptomyces lividans TK23.1, expressing a pIJ702-encoded extracellular lignin peroxidase gene cloned from the chromosome of Streptomyces virodosporus T...
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EFFECTS OF ACTIVATED CARBON ON THE REACTIONS OF FREE CHLORINE WITH PHENOLS |
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The use of prechlorination in drinking water treatment results in contact of free chlorine with activated carbon which has been added to remove organic compounds from water. The ch...
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EFFECTS OF ACUTE ALCOHOL EXPOSURE ON HEPATIC PARTITIONING OF CARBON TETRACHLORIDE: AN ADDITIONAL MECHANISM FOR ALCOHOL-MEDIATED POTENTIATION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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EFFECTS OF AERATION AND TEMPERATURE ON COMPOSTING OF MUNICIPAL SLUDGE IN A FULL-SCALE VESSEL SYSTEM |
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Trials were replicated in an aerated reactor vessel to obtain quantitative data on the relationships between aeration, temperature, and performance of municipal sludge composting. ...
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EFFECTS OF APPLIANCE TYPE AND OPERATING VARIABLES ON WOODSTOVE EMISSIONS: VOLUME I. REPORT AND APPENDICIES A-C. |
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The report gives results of a project, in support of the intergrated Air Canver Project (IACP) to provide data on the specific effects of appliance type and operating variales on w...
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EFFECTS OF APPLIANCE TYPE AND OPERATING VARIABLES ON WOODSTOVE EMISSIONS: VOLUME II. APPENDICIES D-F. |
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The report gives results of a project, in support of the intergared Air Cancer Project (IACP), to provide data on the specific effects of appliance type and operating variables on ...
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EFFECTS OF APPLICANE TYPE AND OPERATING VARIABLES ON WOODSTOVE EMISSIONS: VOLUME I. REPORT AND APPENDICES A-C |
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The report gives results of a project, in support of the intergrated Air Canver Project (IACP) to provide data on the specific effects of appliance type and operating variales on w...
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EFFECTS OF APPLICANE TYPE AND OPERATING VARIABLES ON WOODSTOVE EMISSIONS: VOLUME II. APPENDICES D-F |
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The report gives results of a project, in support of the intergared Air Cancer Project (IACP), to provide data on the specific effects of appliance type and operating variables on ...
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EFFECTS OF ATMOSPHERIC MIX AND TOXIC FUMES ON MILITARY PERFORMANCE |
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The present chapter covers the individual and combined neuro-behavioral effects of four of the major products of combustion. hey are carbon monoxide, hydrogen cyanide, carbon dioxi...
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EFFECTS OF ATMOSPHERIC POLLUTANTS ON HUMAN PHYSIOLOGIC FUNCTION |
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Short-term health effects of common ambient air pollutants, particularly photochemical oxidants, were investigated under controlled conditions simulating typical ambient exposures....
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EFFECTS OF BACKGROUND DISSOLVED ORGANIC MATTER ON THE REMOVAL OF NITROAROMATIC COMPOUNDS FROM AQUEOUS SOLUTION BY GRANULAR ACTIVATED CARBON. (R822721C636) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECTS OF BACTERIAL LIGNIN PEROXIDASE ON ORGANIC CARBON MINERALIZATION IN SOIL, USING RECOMBINANT STREPTOMYCES STRAINS |
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Purified lignin peroxidase was added to sterile and nonsterile silt loam soil to study the effects of bacterial lignin peroxidase ALip-P3 of Streptomyces viridosporus T7A on the ra...
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EFFECTS OF BENTONITE CLAY SOLIDS ON POLIOVIRUS CONCENTRATION FROM WATER BY MICROPOROUS FILTER METHODS |
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In order to determine if suspended solids interfere with enteric virus recovery from water by microporous filter methods, the effects of bentonite clay solids at a concentration of...
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EFFECTS OF CARBON DIOXIDE AND OZONE ON GROWTH AND BIOMASS ALLOCATION IN PINUS PONDEROSA |
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The future productivity of forests will be affected by combinations of elevated atmospheric CO2 and O3. Because productivity of forests will, in part, be determined by growth of yo...
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EFFECTS OF CARBON DIOXIDE AND OZONE ON NITROGEN RETRANSLOCATION IN PONDEROSA PINE NEEDLES |
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Changes in leaf N concentration can be an important response to air pollutants in trees, with implications both for tree growth and N cycling through forest ecosystems. Ozone caus...
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EFFECTS OF CLIMATE CHANGE ON LABILE AND STRUCTURAL CARBON IN DOUGLAS-FIR NEEDLES AS ESTIMATED BY DELTA 13C AND C AREA MEASUREMENTS |
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Isotopic measurements may provide new insights into levels in leaves of labile and structural carbon (C) under climate change. In a 4-year climate change experiment using Pseudots...
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EFFECTS OF CLIMATE VARIABILITY ON THE CARBON DIOXIDE, WATER, AND SENSIBLE HEAT FLUXES ABOVE A PONDEROSA PINE PLANTATION IN THE SIERRA NEVADA, CA. (R826601) |
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AbstractFluxes of CO2, water vapor, and sensible heat were measured by the eddy covariance method above a young ponderosa pine plantation in the Sierra Nevad...
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EFFECTS OF CO2 AND CLIMATE CHANGE ON FOREST TREES |
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The U.S. Environmental Protection Agency has created the Global Climate Research Program (GCRP) to provide integrated research on all aspects of the trace gases and climate change....
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EFFECTS OF CO2 AND O3 ON CARBON FLUX FOR PONDEROSA PINE PLANT/LITTER/SOIL SYSTEM |
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Carbon dioxide (CO2), a main contributor to global climate change, also adds carbon to forests. In contrast, tropospheric ozone (O3) can reduce carbon uptake and increase carbon lo...
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EFFECTS OF COMPLEX LAKE EFFLUENTS ON PHOTOSYNTHESIS IN LAKE ERIE AND LAKE HURON |
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Phytoplankton are the base of the food chain in most large lake ecosystems; if affected by environmental pollutants, significant ecosystem changes can result with potential impact ...
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EFFECTS OF CULTURE PARAMETERS ON DDT [1,1,-TRICHLORO-2,2-BIS(4-CHLOROPHENYL) ETHANE] BIODEGRADATION BY PHANEROCHAETE CHRYSOSPORIUM |
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The lignin degrading system of the white rot fungus Phanerochaete chrysosporium is able to degrade a wide variety of structurally diverse organopollutants to carbon dioxide. urrent...
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EFFECTS OF CULTURE PARAMETERS ON DDT [1,1,1-TRICHLO- RO-2,2-BIS(4-CHLOROPHENYL) ETHANE] BIODEGRADATION BY PHANEROCHAETE CHRYSOSPORIUM |
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The lignin degrading system of the white rot fungus Phanerochaete chrysosporium is able to degrade a wide variety of structurally diverse organopollutants to carbon dioxid...
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EFFECTS OF DDT SEDIMENT-CONTAMINATION ON MACROFAUNAL COMMUNITY STRUCTURE AND COMPOSITION IN SAN FRANCISCO BAY |
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The objectives of this study were to determine the effects of sediment contamination on the benthic macrofauna and to predict macrofaunal changes following remediation at a Superfu...
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EFFECTS OF DIESEL EXHAUST PARTICLES AND CARBON BLACK ON INDUCTION OF DUST MITE ALLERGY IN BROWN NORWAY RATS |
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Particulate matter (PM) components of air pollution have been shown to produce significant respiratory health effects among asthmatics and other susceptible populations. Experimen...
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EFFECTS OF DIESEL EXHAUST PARTICLES ON HUMAN ALVEOLAR MACROPHAGE RESPONSIVENESS TO LIPOPOLYSACCHARIDE |
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Effects of diesel exhaust particles on human alveolar macrophage responsiveness to lipopolysaccharide
S. Mundandhara1 , S. Becker2 and M. Madden2, 1UNC Center for Environmental ...
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EFFECTS OF DIESEL EXHAUST PARTICLES ON HUMAN MACROPHAGE RESPONSIVENESS TO LIPOPOLYSACCHARIDE |
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EFFECTS OF DIESEL EXHAUST PARTICLES ON HUMAN MACROPHAGE RESPONSIVENESS TO LIPOPOLYSACCHARIDE
S. Mundandhara1 and M.C. Madden2, 1UNC Center for Environmental Medicine, Asthma, a...
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EFFECTS OF DIESEL PARTICLE FREE RADICALS AND ORGANICS ON CYTOTOXICITY AND CELL SIGNALING |
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Diesel exhaust particles (DEPs) have been reported to induce inflammatory lung diseases, although the major contributing components in DEPs and the mechanisms remain to be understo...
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EFFECTS OF DIFFERENT FORMS OF ORGANIC CARBON ON THE PARTITIONING AND BIOAVAILABILITY OF NONPHENYL |
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Oxygenated nonpolar organic contaminants (NOCs) are underrepresented in studies of the partitioning and bioavailability of NOCs, including nonylphenol. In this investigation, we ev...
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EFFECTS OF DISSOLVED ORGANIC CARBON AND SECOND SUBSTRATES ON THE BIODEGRADATION OF ORGANIC COMPOUNDS AT LOW CONCENTRATIONS |
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Pseudomonas acidovorans and Pseudomonas sp. strain ANL but not Salmonella typhimurium grew in an inorganic salts solution. Results indicate that second substrates and uncharacteriz...
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EFFECTS OF DRILLING FLUIDS ON 'THALASSIA TESTUDINUM' AND ITS EPIPHYTIC ALGAE |
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A flow-through microcosm system was developed to assess the potential influence of drilling fluids on Thalassia testudinum and its epiphytic algae. Two treatments (drilling fluid a...
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EFFECTS OF EELGRASS ZOSTRA MARINA CANOPIES ON FLOW AND TRANSPORT |
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Ecological effects of the interaction between submerged aquatic vegetation and currents depend on the plants and their associated organisms as well as the large-scale transport of ...
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EFFECTS OF ELEVATED CO2 AND TEMPERATURE ON SOIL CARBON DENSITY FRACTIONS IN A DOUGLAS FIR MESOCOSM STUDY |
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We conducted a 4-year full-factorial study of the effects of elevated atmospheric CO2 and temperature on Douglas fir seedlings growing in reconstructed native forest soils in mesoc...
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EFFECTS OF ELEVATED CO2 AND TEMPERATURE ON THE RESPONSE OF PONDEROSA PINE TO OZONE: A SIMULATION ANALYSIS |
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Forests regulate numerous biogeochemical cycles, storing and cycling carbon, water, and nutrients, however, there is concern how climate change, elevated CO2 and tropospheric O3 wi...
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EFFECTS OF ELEVATED CO2 ON ROOT GROWTH AND PHYSIOLOGY FOR DESERT PLANTS |
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The effects of elevated atmospheric CO2 on the growth and physiology of roots have been measured in situ at the Nevada Desert FACE Facility. Minirhizotron measurements of fine roo...
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EFFECTS OF ELEVATED CO2 ON THE FINE ROOT BIOMASS OF TWO MOJAVE DESERT SHRUBS |
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abstract/abstract...
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EFFECTS OF ENVIRONMENTAL TOBACCO SMOKE EXPOSURE AND GAS STOVES ON DAILY PEAK FLOW RATES IN ASTHMATIC AND NON-ASTHMATIC FAMILIES |
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There is substantial agreement that environmental tobacco smoke (ETS) produces annoyance and sensory irritant effects: (1) There is a potential for cardiovascular and respiratory d...
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EFFECTS OF FERTILIZER ADDITION ON MICROBIAL RESPIRATION AND UPTAKE OF CARBON MONOXIDE IN A CERRADO SOIL |
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The savanna area in central Brazil (Cerrado) is undergoing rapid agricultural land use changes and these changes are often accompanied by fertilization of the land. Because fertil...
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EFFECTS OF FERTILIZER ADDITION ON MICROBIAL RESPIRATION AND UPTAKE OF CARBON MONOXIDE IN A CERRADO SOIL |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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EFFECTS OF FLOW REGIME ON THE ECOLOGY OF EXPERIMENTAL CHANNELS SIMULATING PRE-DEVELOPMENT AND MANAGED POST-DEVELOPMENT CONDITIONS |
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Best management practices (BMPs) are placed in streams or watersheds to mitigate the effects of hydrological, chemical, or physical stressors resulting from anthropogenic activitie...
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EFFECTS OF FREEZING ON TOXICITY OF SEDIMENTS CONTAMINATED WITH DDT AND ENDRIN |
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Two freshwater sediments containing 3 and 11% total organic carbon (TOC) were spiked with DDT and endrin to compare the effects of cold (4C) and frozen (-20C) storage of the sedime...
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EFFECTS OF GAMMA RADIATION ON STEM DIAMETER GROWTH, CARBON GAIN AND BIOMASS PARTITIONING IN HELIANTHUS ANNUUS |
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NO ABSTRACT PROVIDED...
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EFFECTS OF IN SITU LIGHT REDUCTION ON WILD CELERY, VALLISNERIA AMERICANA, IN PERDIDO BAY, AL |
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The effects of reducing available light using commercially available shade cloth were examined in a densely populated grassbed of wild celery, Vallisneria americana. Grassbeds were...
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EFFECTS OF IN SITU LIGHT REDUCTION ON WILD CELERY, VALLISNERIA AMERICANA, IN PERDIDO BAY, ALABAMA |
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The effects of reducing ambient light using commercially available shade cloth were examined in a densely populated grassbed of wild celerly, Vallisneria americana. Grassbeds were ...
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EFFECTS OF INCREASED SOLAR ULTRAVIOLET RADIATION ON BIOGEOCHEMICAL CYCLES |
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Increases in solar UV radiation could affect terrestrial and aquatic biogeochemical cycles thus altering both sources and sinks of greenhouse and chemically important trace gases (...
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EFFECTS OF INHALATION OF ORGANIC CHEMICAL AIR CONTAMINANTS ON MURINE LUNG HOST DEFENSES |
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The potential health hazards of exposure to threshold limit value (TLV) concentrations of acetaldehyde, acrolein, propylene oxide, chloroform, methyl chloroform, carbon tetrachlori...
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EFFECTS OF LOW LEVEL CARBON MONOXIDE EXPOSURE. BLOOD LIPIDS AND COAGULATION PARAMETERS |
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The study examined the effects of carbon monoxide (CO) in 50 and 100 ppm doses on response to treadmill exercise, blood coagulation and blood lipids in normal men. Twenty-three men...
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EFFECTS OF MALATHION ON MICROORGANISMS OF AN ARTIFICIAL SALT-MARSH ENVIRONMENT |
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Laboratory salt-marsh environments were treated with malathion, an organophosphate insectide, and aerobic heterotrophic bacteria were monitored to determine changes in their microb...
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EFFECTS OF MOISTURE AND BURNING ON SOIL-ATMOSPHERE EXCHANGE OF TRACE CARBON GASES IN A SOUTHERN AFRICAN SAVANNA |
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NO ABSTRACT PROVIDED...
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EFFECTS OF NATURAL ORGANIC MATTER, ANTHROPOGENIC SURFACTANTS, AND MODEL QUINONES ON THE REDUCTION OF CONTAMINANTS BY ZERO-VALENT IRON. (R827117) |
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Recent studies of contaminant reduction by zero-valent iron metal (Fe0) have highlighted the role of iron oxides at the metal–water interface and the effect th...
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EFFECTS OF NITROGEN ENRICHMENT, WILDFIRE, AND HARVESTING ON FOREST-SOIL CARBON AND NITROGEN. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECTS OF ORGANIC CARBON APPLIED AS DAIRY EFFLUENT ON NITRATE LEACHING FROM A SANDY GRASSLAND SOIL: AN N STUDY |
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Nitrate (NO3-) leaching from dairy cattle urine is considered to be a major cause of surface and ground water contamination. Previous studies have shown that carbon sources can red...
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EFFECTS OF PHOTOCHEMICAL KINETIC MECHANISMS ON OXIDANT MODEL PREDICTIONS |
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The comparative effects of kinetic mechanisms on oxidant model predictions have been tested using two different mechanisms (the Carbon-Bond Mechanism II (CBM-II) and the Demerjian ...
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EFFECTS OF PHOTOCHEMICAL, MICROBIAL AND SORPTION PROCESSES ON THE OPTICAL PROPERTIES AND DEGRADATION OF DISSOLVED ORGANIC MATTER FROM COASTAL WETLANDS |
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The dissolved organic matter (DOM) exported from rivers and intertidal marshes to coastal oceans is rich in light-absorbing, fluorescent constituents, including humic substances an...
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EFFECTS OF PLANT SIZE ON PHOTOSYNTHESIS AND WATER RELATIONS IN THE DESERT SHRUB PROSOPIS GLANDULOSA (FABACEAE) |
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The Jornada del Muerto basin of the Chihuahuan Desert of southern New Mexico, USA, has undergone a marked transition of plant communities. Shrubs such as mesquite (Prosopis glandul...
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EFFECTS OF REDUCTIVE PRETREATMENT AND DISSOLVED OXYGEN ON THE REMOVAL OF NITROAROMATIC COMPOUNDS FROM AQUEOUS SOLUTION BY GRANULAR ACTIVATED CARBON. (R822721C636) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECTS OF REVERSE OSMOSIS ISOLATION ON REACTIVITY OF NATURALLY OCCURRING DISSOLVED ORGANIC MATTER IN PHYSICOCHEMICAL PROCESSES. (R828045) |
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A field reverse osmosis system was used to isolate dissolved organic matter (DOM) from two lacustrine and two riverine surface water sources. The rejection of DOM was on the ord...
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EFFECTS OF SAMPLE PREPARATION ON THE MEASUREMENT OF ORGANIC CARBON, HYDROGEN, SULFUR, AND OXYGEN CONCENTRATIONS IN MARINE SEDIMENTS |
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The elemental composition of marine sediment provides useful information for the study of environmental processes including biogeochemical cycling and contaminant partitioning. It ...
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EFFECTS OF SAMPLE STORAGE ON A COPPER-SPIKED FRESHWATER SEDIMENT |
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Freshwater sediment from an Oregon lake was spiked with copper in the laboratory to study the effect of storage on copper toxicity. Peat moss was added to enhance the carbon conten...
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EFFECTS OF SOLAR RADIATION ON ORGANIC MATTER CYCLING: FORMATION OF CARBON MONOXIDE AND CARBONYL SULFIDE |
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The effects of photoinduced processes on carbon cycling and the biospheric emission of two important trace carbon gases--carbon monoxide and carbonyl sulfide-are examined. oth of t...
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EFFECTS OF STORAGE ON THE TOXICITY OF SEDIMENTS SPIKED WITH FLUORANTHENE TO THE AMPHIPOD, RHEPOXYNIUS ABRONIUS |
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To determine the effect of storage on contaminant bioavailability and toxicity, two sediment types, a fine sand and silty sand, were spiked with nine concentrations of fluorant...
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EFFECTS OF STRATOSPHERE OZONE DEPLETION ON AQUATIC ORGANISMS |
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As a result of stratospheric ozone depletion, UV-Bradiation (290-320 nm) leaching aquatic environments is likely to increase over the next few decades. vailable information suggest...
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EFFECTS OF STREAM RESTORATION ON GROUND WATER NITRATE AT MINEBANK RUN, AN URBAN STREAM IN THE CHESAPEAKE BAY WATERSHED |
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Elevated nitrate levels in streams and ground water pose human and ecological threats. Microbial denitrification removes nitrate from ground water but requires anaerobic (saturat...
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EFFECTS OF SUCCESSION ON NITROGEN EXPORT IN THE WEST-CENTRAL CASCADES, OREGON |
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Conceptual models predict that unpolluted, aggrading forest ecosystems tightly retain available nitrogen (N) until declining productivity by mature trees and storage in detritus re...
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EFFECTS OF SUNLIGHT ON CARBOXYL CONTENT OF DISSOLVED ORGANIC MATTER IN THE SATILLA RIVER OF GEORGIA, UNITED STATES |
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A study examined the effect of sunlight-initiated photo-degradation of dissolved organic matter (DOM) on its carboxyl content, and the role of oxygen and iron in this process. Sola...
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EFFECTS OF THERMAL TREATMENTS ON THE CHEMICAL REACTIVITY OF TRICHLOROETHYLENE |
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A series of experiments was completed to investigate abiotic degradation and reaction product formation of trichloroethylene (TCE) when heated. A quartz-tube apparatus was used to ...
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EFFECTS OF ULTRAVIOLET-B RADIATION ON PHOTOSYNTHESIS OF DIFFERENT AGED NEEDLES IN FIELD-GROWN LOBLOLLY PINE |
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A continuing decline in stratospheric ozone concentrations caused y atmospheric pollutants has stimulated interest in consequences f increased enetration f ultraviolet-B radiation ...
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EFFECTS OF ULTRAVIOLET-B RADIATION ON PRIMARY PRODUCTION ALONG LATITUDINAL TRANSECTS IN THE SOUTH PACIFIC OCEAN |
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Ambient intensities of solar ultraviolet radiation inhibit photosynthesis in the upper layers of the oceans. n this study the effect of ultraviolet-B radiation (UVBR) (290-320 nm) ...
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EFFECTS OF USING THE CB05 VERSUS THE CB4 CHEMICAL MECHANISM ON MODEL PREDICTIONS |
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The Carbon Bond 4 (CB4) chemical mechanism has been widely used for many years in box and air quality models to predict the effect of atmospheric chemistry on pollutant concentrati...
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EFFECTS OF USING THE CB05 VERSUS THE CB4 CHEMICAL MECHANISMS ON MODEL PREDICTIONS |
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The Carbon Bond 4 (CB4) chemical mechanism has been widely used for many years in box and air quality models to predict the effect of atmospheric chemistry on pollutant concentrati...
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EFFECTS OF VALLISNERIA AMERICANA (L.) ON COMMUNITY STRUCTURE AND ECOSYSTEM FUNCTION IN LAKE MESOCOSMS |
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Submerged aquatic vegetation is known as a key structural component and regulator in ecosystems. In this mesocosm study, we examine community- and system-level responses to the pre...
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EFFECTS OF WATER QUALITY ON MICROPOROUS FILTER METHODS FOR ENTERIC VIRUS CONCENTRATION |
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Model enteric viruses were concentrated from seeded samples of raw, finished and granular activated carbon (GAC)-treated waters and from GAC-treated waters supplemented with humic ...
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EFFICIENCY OF DIOXIN RECOVERY FROM FLY ASH SAMPLES DURING EXTRACTION AND CLEANUP PROCESS |
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The data from preliminary investigations of the efficiency of dioxin recovery from fly ash samples during sample extraction and subsequent column cleanup of sample extracts are dis...
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EFFICIENT CHEMICAL TRANSFORMATIONS USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The diverse nature of chemical entities requires various green' strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave (M...
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ELECTROCHEMICAL DETERMINATION OF HYDROGEN SULFIDE AT CARBON NANOTUBE MODIFIED ELECTRODES. (R830900) |
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Carbon nanotube (CNT) modified glassy carbon electrodes exhibiting a strong and stable electrocatalytic response towards sulfide are described. A substantial (400 mV) decre...
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ELEMENTAL FINGERPRINTS OF JUVENILE WINTER FLOUNDER OTOLITHS FROM NARRAGNSETT BAY, RI AND SURROUNDING COASTAL PONDS |
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Elemental fingerprinting has become a powerful tool in fisheries science for identifying fish migration patterns, seasonal changes in habitat use, and for delineating the nursery o...
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ELEMENTAL MERCURY ADSORPTION BY ACTIVATED CARBON TREATED WITH SULFURIC ACID |
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The paper gives results of a study of the adsorption of elemental mercury at 125 C by a sulfuric-acid (H2S04, 50% w/w/ solution)-treated carbon for the removal of mercury from flue...
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ELEMENTAL MERCURY CAPTURE BY ACTIVATED CARBON IN A FLOW REACTOR |
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The paper gives results of bench-scale experiments in a flow reactor to simulate the entrained-flow capture of elemental mercury (Hgo) using solid sorbents. Adsorption of Hgo ...
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ELEMENTS OF THE U.S. CARBON BUDGET: PROGRESS AND PRELIMINARY RESULTS |
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The development of carbon budget for the U.S. is important in terms of 1) comparing the relative magnitudes of biogenic and anthropogenic flux, 2) contributing to the construction ...
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ELEVATED CO2 AND ELEVATED TEMPERATURE AFFECT CARBON AND NITROGEN CONCENTRATIONS BUT NOT ACCUMULATION IN PSEUDOTSUGA MENZIESII SEEDLINGS |
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To determine the impact of climate change on concentrations and accumulation of C and N in trees, we grew Pseudotsuga menziesii (Mirb.) Franco (Douglas-fir) seedlings treated with...
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ELEVATED CO2 AND ELEVATED TEMPERATURE HAVE NO EFFECT ON DOUGLAS-FIR FINE-ROOT DYNAMICS IN NITROGEN-POOR SOIL |
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Here, we investigate fine-root production, mortality and standing crop of Douglas-fir (Pseudotsuga menziesii) seedlings exposed to elevated atmospheric CO2 and elevated air tempera...
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ELEVATED CO2 AND TEMPERATURE ALTER NITROGEN ALLOCATION IN DOUGLAS-FIR |
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The effects of elevated CO2 and temperature on principal carbon constituents (PCC) and C and N allocation between needle, woody (stem and branches) and root tissue of Pseudotsuga m...
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ELEVATED CO2 AND TEMPERATURE ALTER THE RESPONSE OF PINUS PONDEROSA TO OZONE: A SIMULATION ANALYSIS |
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Forests regulate numerous biogeochemical cycles, storing and cycling large quantities of carbon, water, and nutrients, however, there is concern how climate change, elevated CO2 an...
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ELEVATED LEVELS OF DISSOLVED SULFIDES IN SURFICIAL SEDIMENTS OF YAQUINA BAY ESTUARY, OREGON |
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Concentrations of dissolved sulfides were measured via the standard colorimetric method in porewater of surficial sediments collected during 2000 from two sites in Yaquina Bay estu...
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ELEVATED TEMPERATUARE AND CARBON DIOXIDE AFFECT CHLOROPHYLLS AND CAROTENOIDS IN DOUGLAS-FIR SEEDLINGS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ELEVATED TEMPERATURE AND ULTRAVIOLET LIGHT AFFECT CONDITION OF REEF BUILDING CORALS |
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Abstract and Poster for the EPA Science Forum.
Reef-building corals are declining throughout the world, even at locations with low human populations. Declines have been link...
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ELIMINATION OF TOLUENE VAPORS IN BIOTRICKLING FILTERS: MASS BALANCE AND CARBON YIELDS UNDER VARIOUS OPERATING CONDITIONS. (R825392) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ELUCIDATING THE ROLE OF ELECTRON TRANSFER MEDIATORS IN REDUCTIVE TRANSFORMATIONS IN NATURAL SEDIMENTS |
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To study the identity and reactivity of electron transfer mediators (ETMs) in natural sediments, the reduction kinetics of a glass bead-azo dye complex were measured in abiotic and...
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ELUTION OF ORGANIC SOLUTES FROM DIFFERENT POLARITY SORBENTS USING SUBCRITICAL WATER. (R825394) |
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The intermolecular interactions between organic solutes and sorbent matrices under subcritical water conditions have been investigated at a pressure of 50 bar and temperatures rang...
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EMERGING TECHNOLOGIES FOR BIOETHANOL RECOVERY USING MEMBRANE PROCESSES |
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Petroleum is currently used as the starting material for many commodity chemicals and fuels, but the prospect of dwindling oil supplies, reliance on unpredictable oil sources, and ...
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EMERGING TECHNOLOGIES FOR THE MANAGEMENT AND UTILIZATION OF LANDFILL GAS |
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The report gives information on emerging technologies that are considered to be commercially available (Tier 1), currently undergoing research and development (Tier 2), or consider...
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EMERGING TECHNOLOGY BULLETIN - METHANOTROPHIC BIOREACTOR SYSTEM - BIOTROL, INC. |
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BioTrol's Methanotrophic Bioreactor is an above-ground remedial system for water contaminated with halogenated volatile organic compounds, including trichloroethylene (ICE) and rel...
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EMERGING TECHNOLOGY BULLETIN: BIOSCRUBBER ALUMINUM COMPANY OF AMERICA |
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Biofiltratfon is an established economical air pollution control technology for removing organic contaminants from air. The existing filters using natural media, such as peat and c...
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EMERGING TECHNOLOGY BULLETIN: PHOTOELECTROCATALYTIC DEGRADATION AND REMOVAL OF ORGANIC AND INORGANIC CONTAMINANTS IN GROUND WATERS |
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Photocatalytic oxidation offers a means of remediating low concentrations of organics in aqueous and air streams. Commercial development of this technology is limited by relatively...
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EMERGING TECHNOLOGY BULLETIN: PROCESS FOR THE TREATMENT OF VOLATILE ORGANIC CARBON AND HEAVY-METAL- CONTAMINATED SOIL - INTERNATIONAL TECHNOLOGY CORPORATION |
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The batch steam distillation and
metal extraction treatment process is a two-stage system that
treats soils contaminated with organics and inorganics. This system
uses conventio...
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EMERGING TECHNOLOGY BULLETIN: REMOVAL OF PHENOL FROM AQUEOUS SOLUTIONS USING HIGH ENERGY ELECTRON BEAM IRRADIATION |
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Irradiation of aqueous solutions with high-energy electrons results in the formation of the aqueous electron, hydrogen radical, H-, and the hydroxyl radical, OH-. These reactive tr...
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EMERGING TECHNOLOGY REPORT: DESTRUCTION OF ORGANIC CONTAMINANTS IN AIR USING ADVANCED ULTRAVIOLET FLASHLAMPS |
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This paper describes a new process for photo-oxidation of volatile organic compounds (VOCs) in air using an advanced ultraviolet source, a Purus xenon flashlamp. The flashlamps hav...
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EMERGING TECHNOLOGY SUMMARY - SIMULTANEOUS DESTRUCTION OF ORGANICS AND STABILIZATION OF METALS IN SOILS |
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The Sulchem Process reacts the material being treated with elemental sulfur at elevated temperatures in an inert reactor system. Organic hydrocarbons react with the sulfur to form ...
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EMERGING TECHNOLOGY SUMMARY: DEMONSTRATION OF AMBERSORB 563 ADSORBENT TECHNOLOGY |
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A field pilot study was conducted to demonstrate the technical feasibility
and cost-effectiveness of Ambersorb® 5631 carbonaceous adsorbent for
remediating groundwater contaminat...
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EMISSION FROM IN-USE HEAVY-DUTY GASOLINE TRUCKS |
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Apportionment of air pollution to sources requires knowledge of source emission strengths and/or chemical and physical characteristics. The literature is deficient in data useful f...
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EMISSION INVENTORY IMPROVEMENT PROGRAM (EIIP) AREA SOURCE COMMITTEE |
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The paper described activities and future plans of the Emission Inventory improvement Program (EIIP) Area Source Committee, as discussed during the November 2, 1994, EIIP panel dis...
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EMISSION OF METALS AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME VI: SITE 4 FINAL EMISSION TEST REPORT |
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The Site 4 plant treats 11 to 12 MGD of wastewater from domestic (80% of influent) and industrial (20% of influent) sources. he treated primary/secondary sludge is dewatered using ...
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EMISSION OF ORGANIC COMPOUNDS AND COMBUSTION GASES DURING HAZARDOUSWASTE COFIRING IN A WATERTUBE PACKAGE BOILER |
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The primary objective of this study was to evaluate the sorptionand desorption of organic compounds on combustion-generated sootduring the cofiring of hazardous organics with fuel ...
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EMISSION OF VOLATILE ORGANIC COMPOUNDS FROM DRUM-MIX ASPHALT PLANTS |
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This research program was undertaken in order to develop a quantitative estimate of the emission of volatile organic compounds (VOCs) from drum-mix asphalt plants. The study was ca...
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EMISSION RATES OF MERCURY FROM LATEX PAINTS |
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The paper gives results of tests of latex paints containing organic mercury additives in small environmental test chambers to determine the emission rates of mercury. Five paints w...
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EMISSION TEST REPORT - FIELD TEST OF CARBON INJECTION FOR MERCURY CONTROL - CAMDEN COUNTY MUNICIPAL WASTE COMBUSTOR |
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The report gives results of parametric test to evaluate the injection powdered activated carbon to control volatile pollutants in municipal waste combustor (MWC) flue gas. he tests...
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EMISSION TEST REPORT, OMSS FIELD TEST ON CARBON INJECTION FOR MERCURY CONTROL |
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The report discusses results of a parametric evaluation of powdered activated carbon for control of mercury (Hg) emission from a municipal waste combustion (MWC) equipped with a li...
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EMISSION TEST REPORT, OMSS FIELD TEST ON CARBON INJECTION FOR MERCURY CONTROL |
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The report discusses results of a parametric evaluation of powdered activated carbon for control of mercury (Hg) emission from a municipal waste cornbustor (MWC) equipped with a li...
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EMISSION TEST REPORT- FIELD TEST OF CARBON INJECTION FOR MERCURY CONTROL, CAMDEN COUNTY MUNICIPAL WASTE COMBUSTOR |
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The report gives results of parametric test to evaluate the injection powdered activated carbon to control volatile pollutants in municipal waste combustor (MWC) flue gas. he tests...
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EMISSION TESTING AND EVALUATION OF FORD/KOPPERS COKE PUSHING CONTROL SYSTEM. VOLUME I. FINAL REPORT |
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The report documents a field testing and engineering evaluation of the performance of a retrofitted, mobile-hood, high-energy-scrubber control system, abating coke-side pushing emi...
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EMISSION TESTING AND EVALUATION OF FORD/KOPPERS COKE PUSHING CONTROL SYSTEM. VOLUME II. APPENDICES |
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The report documents a field testing and engineering evaluation of the performance of a retrofitted, mobile-hood, high-energy-scrubber control system, abating coke-side pushing emi...
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EMISSIONS AND FUEL ECONOMY OF FEDERAL ALTERNATIVELY FUELED FLEET VEHICLES |
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This paper presents results from a study designed to investigate the effects of automobile fuels on emissions and fuel economy. The study is part of a larger program mandated by th...
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EMISSIONS ASSESSMENT FOR REFUSE-DERIVED FUEL COMBUSTION |
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The RDF and coal were burned in a small spreader-stoker fired boiler. The parameters that were varied in this program were RDF type and amount of coal burned with the RDF. In two e...
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EMISSIONS FROM BURNING CABINET MAKING SCRAPS |
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The report gives results of an initial determination of differences in missions when burning ordinary cordwood compared to kitchen cabinet making scraps. he tests were performed in...
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EMISSIONS FROM BURNING CABINET MAKING SCRAPS |
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The report gives results of an initial determination of differences in missions when burning ordinary cordwood compared to kitchen cabinet making scraps. he tests were performed in...
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EMISSIONS FROM OUTDOOR WOOD-BURNING RESIDENTIAL HOT WATER FURNACES |
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The report gives results of measurements of emissions from a single-pass and a double-pass furnace at average heat outputs of 15,000 and 30,000 Btu/hr (4.4 and 8.8 kW) while burnin...
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EMISSIONS FROM SLUDGE INCINERATORS WITH VENTURI AND TRAY SCRUBBERS AND WET ELECTROSTATIC PRECIPITATORS - METALS, CHROMIUM AND NICKEL COMPOUNDS, AND ORGANICS |
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At Site 5 (continuing a numbering system initiated in a previous 4-site project) tests were only conducted for methods development purposes. At Site 6, emissions were measured at t...
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EMISSIONS FROM THE BURNING OF VEGETATIVE DEBRIS IN AIR CURTAIN DESTRUCTORS |
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Although no data has been published on emissions from construction and demolition (C&D) debris burned in an air curtain destructor (ACD), a few studies provide information on emiss...
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EMISSIONS INVENTORIES THEN, NOW, AND TOMORROW |
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As late as the 1970s, air pollution was viewed almost exclusively as an urban phenomenon associated with energy production and factories that was manifested as smog in Los Angeles,...
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EMISSIONS OF METALS ASSOCIATED WITH MOTOR VEHICLE ROADWAYS |
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Emissions of metals and other particle-phase species from on-road motor vehicles were measured in two tunnels in Milwaukee, WI during the summer of 2000 and winter of 2001. Emissio...
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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS |
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In order to provide data to support regulations on municipal wastewater
sludge incineration, emissions of metals, hexavalent chromium, nickel
subsulfide, polychlorinated dibenzo-...
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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME I: SUMMARY REPORT |
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At Site 5 (continuing a numbering system initiated in a previous 4-site project) tests were only conducted for methods development purposes. t Site 6, emissions were measured at th...
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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME IX: SITE 9 EMISSION TEST REPORT - APPENDICES |
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Site 9 is a secondary plant designed for 15 million gallons per day (MGD) of astewater flow. he sludge incInerator at Site 9 is a seven (7) hearth, multiple hearth furnace (MHF) bu...
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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME VI: SITE 8 EMISSION TEST REPORT |
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The Site 8 facility is a 24.1 million gallons per day (MGD) secondary biological treatment plant with a 0.1 MGD septage handling facility. he wastewater influent comes from predomi...
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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME VII: SITE 8 EMISSION TEST REPORT - APPENDICES |
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The Site 8 facility is a 24.1 million gallons per day (MGD) secondary biological treatment plant with a 0.1 MGD septage handling facility. he wastewater influent comes from predomi...
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EMISSIONS OF METALS, CHROMIUM AND NICKEL SPECIES, AND ORGANICS FROM MUNICIPAL WASTEWATER SLUDGE INCINERATORS - VOLUME VIII: SITE 9 EMISSION TEST REPORT |
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Site 9 is a secondary plant designed for 15 million gallons per day (MGD) of astewater flow. he sludge incInerator at Site 9 is a seven (7) hearth, multiple hearth furnace (MHF) bu...
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EMISSIONS REDUCTION DATA FOR GRID-CONNECTED PHOTOVOLTAIC POWER SYSTEMS |
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This study measured the pollutant emission reduction potential of 29 photovoltaic (PV) systems installed on residential and commercial building rooftops across the U.S. from 1993 t...
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EMPIRICAL PREDICTION OF ORGANIC POLLUTANT SORPTION IN NATURAL SEDIMENTS |
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An empirical relationship between octanol/water partition coefficients (Kow) and sediment sorption coefficients (Koc) was determined for nine chloro-s-triazine and dinitroaniline c...
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ENDOCRINE DISRUPTING COMPOUNDS: PROCESSES FOR REMOVAL FROM DRINKING WATER AND WASTEWATER |
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Although the list of potentially harmful substances is still being compiled and more sophisticated laboratory tests for detection of endocrine disrupting chemicals (EDCs) are being...
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ENERGY EFFICIENT VAPOR PHASE OXIDATION OF METHANOL USING OZONE AND CATALYTIC REACTOR |
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The pulp and paper industry releases more than 144 million tons of Volatile Organic Compounds (VOCs) per year. A big portion of this effluent, 66+% is released to air making it th...
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ENERGY PRODUCTION AND POLLUTION PREVENTION AT SEWAGE TREATMENT PLANTS USING FUEL CELL POWER PLANTS |
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The paper discusses energy production and pollution prevention at sewage treatment plants using fuel cell power plants. Anaerobic digester gas (ADG) is produced at waste water tre...
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ENERGY REQUIREMENTS FOR MUNICIPAL POLLUTION CONTROL FACILITIES |
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This report presents information on energy requirements in municipal pollution control facilities for several major areas of interest. (1) Pumping energy for filtration and granula...
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ENGINEERED BIOFILTER FOR REMOVING ORGANIC CONTAMINANTS IN AIR |
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An engineered biofilter was developed to digest hazardous organic emissions from soil, water and air decontamination processes. ench scale unit was tested for > 11 months for the r...
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ENGINEERING AND ECONOMIC FACTORS AFFECTING THE INSTALLATION OF CONTROL TECHNOLOGIES FOR MULTIPOLLUTANT STRATEGIES |
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The report evaluates the engineering and economic factors associated with installing air pollution control technologies to meet the requirements of strategies to control sulfur dio...
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ENGINEERING ASSESSMENT REPORT--HAZARDOUS WASTE COFIRING IN INDUSTRIAL BOILERS. VOLUME 2. DATA SUPPLEMENT |
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This report documents results of 42 hazardous waste combustion tests performed on 11 full-scale industrial boilers. The report discusses the boiler operating conditions, measured o...
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ENGINEERING BULLETIN: AIR STRIPPING OF AQUEOUS SOLUTIONS |
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Air striding is a means to transfer contaminants from aqueous solutions to air. ontaminants are not destroyed by air stripping but are physically separated from the aqueous solutio...
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ENGINEERING BULLETIN: GRANULAR ACTIVATED CARBON TREATMENT |
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Granular activated carbon (GAC) treatment is a physicochemical process that removes a wide variety of contaminants by adsorbing them from liquid and gas streams [1, p. 6-3]. This t...
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ENGINEERING BULLETIN: PYROLYSIS TREATMENT |
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Pyrolysis is formally defined as chemical decomposition induced in organic materials by heat in the absence of oxygen. In practice, it is not possible to achieve a completely oxyge...
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ENHANCED BIOREMEDIATION UTILIZING HYDROGEN PEROXIDE AS A SUPPLEMENTAL SOURCE OF OXYGEN: A LABORATORY AND FIELD STUDY |
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Laboratory and field scale studies were conducted to investigate the feasibility of using hydrogen peroxide as a supplemental source of oxygen for bioremediation of an aviation gas...
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ENHANCED COD (CHEMICAL OXYGEN DEMAND) REMOVAL FROM PHARMACEUTICAL WASTEWATER USING POWDERED ACTIVATED CARBON ADDITION TO AN ACTIVATED SLUDGE SYSTEM |
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Wastewater generated by the pharmaceutical manufacturing point source Sub-categories A (Fermentation Products) and C (Chemical Synthesis Products) are characterized by high COD con...
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ENHANCED CORRISION-BASED PD/MG BIMETALLIC SYSTEMS FOR DECHLORINATION OF PCBS |
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Polychlorinated biphenyls (PCBs) are toxic pollutants notorious for their aquatic and sedimentary prevalence and recalcitrant nature. Bimetallic systems like Pd/Fe have been widely...
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ENHANCED DECHLORINATION OF CARBON TETRACHLORIDE AND CHLOROFORM IN THE PRESENCE OF ELEMENTAL IRON AND METHANOSARCINA BARKERI, METHANOSARCINA THERMOPHILA, OR METHANOSAETA CONCILLII. (R825549C044) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ENHANCED NEUROTOXICITY OF 3,3-IMINODIPROPIONITRILE FOLLOWING PRETREATMENT WITH CARBON TETRACHLORIDE IN THE RAT |
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The present work tested the hypothesis that IDPN must be metabolized by the liver to an active metabolite to neurotoxic. Thus a reduction in IDPN neurotoxicity would be expected wh...
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ENHANCED ORGANIC MATTER REMINERALIZATION AND NUTRIENT TURNOVER BY POPULATIONS OF BURROWING SHRIMP IN YAQUINA BAY, OR |
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Burrowing, or thalassinid, shrimp structure large areas of intertidal habitat of Pacific Northwest estuaries. This field study utilized a combination of anoxic incubations, porewat...
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ENHANCED RETENTION AND SENSITIVITY IN THE ANALYSIS OF CYANURIC ACID IN WATER USING POROUS GRAPHITIC CARBON AND UV DETECTION IN HIGH PRESSURE LIQUID CHROMATOGRAPHY |
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Cyanuric acid (CA) has found application as a chlorine stabilizer in pool waters. The National Swimming Pool Foundation recommends CA levels between 30-50 ppm and a chlorine residu...
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ENHANCED RETENTION AND SENSITIVITY IN THE ANALYSIS OF CYANURIC ACID IN WATER USING POROUS GRAPHITIC CARBON AND UV DETECTION IN HPLC |
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Cyanuric acid (CA) has found application as a chlorine stabilizer in pool waters. The National Swimming Pool Foundation recommends CA levels between 30-50 ppm and a chlorine residu...
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ENHANCED TOXICITY OF CHARGED CARBON NANOTUBES AND ULTRAFINE CARBON BLACK PARTICLES |
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Man-made carbonaceous nano-particles such as single and multi-walled carbon nano-tubes (CNT) and ultra-fine carbon black (UFCB) particles are finding increasing applications in ind...
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ENHANCED: IMPORTING TIMBER, EXPORTING ECOLOGICAL IMPACT |
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Covering 32% of the planet, boreal forests are one of the last relatively intact terrestrial biomes, and are a critical carbon sink in global climate dynamics. Mature and old growt...
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ENRICHMENT OF STABLE CARBON AND HYDROGEN ISOTOPES DURING ANAEROBIC BIODEGRADATION OF MTBE-MICROCOSM AND FIELD EVIDENCE |
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The conventional approach to evaluate biodegradation of organic contaminants in ground water is to demonstrate an increase in the concentration of transformation products. This app...
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ENTEROCOCCI IN THE WATER COLUMN AND SHORELINE INTERSTITIAL WATERS AT BEACHES ON THE GULF OF MEXICO AND SANTA ROSA SOUND, PENSACOLA, FLORIDA |
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Interstitial water in the swash zone, that area of a beach where waves continuously wash up on the sand, is suspected of accumulating microbes. If pathogens are concentrated in th...
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ENTRAINED-FLOW ADSORPTION OF MERCURY USING ACTIVATED CARBON |
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Bench-scale experiments were conducted in a flow reactor to simulate entrained-flow capture of elemental mercury (Hg) by activated carbon. Adsorption of Hg by several commercial ac...
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ENUMERATION AND MORPHOLOGICAL CHARACTERIZATION OF BACTERIA INDIGENOUS TO SUBSURFACE ENVIRONMENTS |
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Subsurface samples from a rapid infiltration wastewater system under construction at Ft. Polk, LA were examined by employing aseptic sampling devices, acridine orange (AO)-fluoresc...
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ENUMERATION, TRANSPORT AND SURVIVAL OF BACTERIA ATTACHED TO GRANULAR ACTIVITATED CARBON IN DRINKING WATER |
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The surfaces of granular activated carbon (GAC), sand, and anthracite particles were found to be populated to the same levels with heterotrophic plate count (HPC) bacteria. GAC sup...
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ENVIRONMENTAL APPLICATION OF GAS CHROMATOGRAPHY/ATOMIC EMISSION DETECTION |
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A gas chromatography/atomic emission detector (GC/AED) system has been evaluated for its applicability to environmental analysis. Detection limits, elemental response factors, and ...
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ENVIRONMENTAL ASSESSMENT DATA BASE FOR COAL LIQUEFACTION TECHNOLOGY: VOLUME II. SYNTHOIL, H-COAL, AND EXXON DONOR SOLVENT PROCESSES |
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This volume is an environmental characterization of three selected coal liquefaction systems: Synthoil, H-Coal, and Exxon Donor Solvent. It documents and evaluates existing environ...
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ENVIRONMENTAL ASSESSMENT OF A COAL/WATER SLURRY FIRED INDUSTRIAL BOILER. VOLUME 1. TECHNICAL RESULTS |
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The report gives results of comprehensive emission measurements and analyses for a 7.6 kg/s (60,000 lb/hr) watertube industrial boiler firing a coal/water slurry. Measurements incl...
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ENVIRONMENTAL ASSESSMENT OF A COAL/WATER SLURRY FIRED INDUSTRIAL BOILER. VOLUME 2. DATA SUPPLEMENT |
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The report gives results of comprehensive emission measurements and analyses for a 7.6 kg/s (60,000 lb/hr) watertube industrial boiler firing a coal/water slurry. Measurements incl...
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ENVIRONMENTAL ASSESSMENT OF STEELMAKING FURNACE DUST DISPOSAL METHODS |
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The report gives results of a study to examine the nature of steelmaking furnace residues and disposal techniques, and to assess potential problems associated with residue disposal...
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ENVIRONMENTAL CHARACTERISTICS AFFECTING REDUCTIVE TRANSFORMATION OF ORGANIC POLLUTANTS IN ANOXIC SEDIMENTS |
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Reductive transformations are important processes for determining the fate of organic pollutants in anoxic environments. These processes are most often microbially mediated by both...
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ENVIRONMENTAL CHARACTERIZATION OF GEOKINETICS' IN-SITU OIL SHALE RETORTING TECHNOLOGY |
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Air emissions and water effluents from true in-situ oil shale retorting were physically, chemically and biologically characterized by sampling of Geokinetics Retort No. 17, a pilot...
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ENVIRONMENTAL CHARACTERIZATION OF GEOKINETICS' IN-SITU OIL SHALE RETORTING TECHNOLOGY: FIELD AND ANALYTICAL DATA APPENDICES |
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Air emissions and water effluents from true in-situ oil shale retorting were physically, chemically and biologically characterized by sampling of Geokinetics Retort No. 17, a pilot...
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ENVIRONMENTAL CONDITIONS IN NORTHERN GULF OF MEXICO COASTAL WATERS FOLLOWING HURRICANE KATRINA |
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On the morning of August 29, 2005 Hurricane Katrina struck the coast of Louisiana, between New Orleans and Biloxi, Mississippi, as a strong category three hurricane on the Saffir-S...
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ENVIRONMENTAL CONSIDERATIONS OF SELECTED ENERGY CONSERVING MANUFACTURING PROCESS OPTIONS: VOLUME III. IRON AND STEEL INDUSTRY REPORT |
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This study assesses the likelihood of new process technology and new practices being introduced by energy intensive industries and explores the environmental impacts of such change...
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ENVIRONMENTAL CONTROLS OVER CARBON DIOXIDE AND WATER VAPOR EXCHANGE OF TERRESTRIAL VEGETATION. (R826601) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ENVIRONMENTAL FACTORS AND CHEMICAL AND MICROBIOLOGICAL CONSTITUENTS RELATED TO THE PRESENECE OF VIRUSES IN GROUND WATER FROM SMALL PUBLIC WATER SUPPLIES IN SOUTHEASTERN MICHIGAN |
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Thirty-eight public ground-water-supply wells serving fewer than 3,300 people were sampled from July 1999 through July 2001 in southeastern Michigan to determine (1) the occurrence...
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ENVIRONMENTAL FACTORS AND CHEMICAL AND MICROBIOLOGICAL WATER QUALITY CONSTITUTENTS RELATED TO THE PRESENCE OF ENTERIC VIRUSES IN GROUND WATER FROM SMALL PUBLIC WATER SUPPLIES IN SOUTHEASTERN MICHIGAN |
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A study of small public ground-water-supply wells that produce water from discontinuous sand and gravel aquifers was done from July 1999 through July 2001 in southeastern Michigan....
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ENVIRONMENTAL FATE CONSTANTS FOR ADDITIONAL 27 ORGANIC CHEMICALS UNDER CONSIDERATION FOR EPA'S HAZARDOUS WASTE IDENTIFICATION PROJECTS |
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Under Section 301 of the Resource Conservation and Recovery Act (RCRA), EPA's Office of Solid Waste is in the process of identifying chemicals to be considered in projects called t...
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ENVIRONMENTAL FATE CONSTANTS FOR ORGANIC CHEMICALS UNDER CONSIDERATION FOR EPA'S HAZARDOUS WASTE IDENTIFICATION PROJECTS |
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Under Section 301 of the Resource Conservation and Recovery Act (RCRA), EPA's Office of Solid Waste is in the process of identifying chemicals to be considered in projects called t...
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ENVIRONMENTAL IMMUNOCHEMISTRY AT THE U.S. EPA, NATIONAL EXPOSURE RESEARCH LABORATORY'S HUMAN EXPOSURE BRANCH |
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Immunoehemical methods are responding to the changing needs of regulatory and monitoring programs and are meeting new analytical challenges as they arise. Recent advances in envi...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION (R): REPORT TO CONGRESS ON PHASE I OF THE ORIMULSION TECHNOLOGY ASSESSMENT PROGRAM, VOLUME 2 |
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The report gives results of an evaluation of Orimulsion, a bitumen-in-water emulsion produced in Venezuela, to provide a better understanding of the potential environmental impacts...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION (R): REPORT TO CONGRESS ON PHASE I OF THE ORIMULSION TECHNOLOGY ASSESSMENT PROGRAM, VOLUME 2: PROJECT REPORT/SUMMARY |
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NRMRL-RTP-193b Miller*, C.A., Dreher, KL, Wentsel*, R., and Nadeau*, R.J. Environmental Impacts of the Use of Orimulsion (R): Report to Congress on Phase I of the Orimulsion Techn...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION.: REPORT TO CONGRESS ON PHASE 1 OF THE ORIMULSION TECHNOLOGY ASSESSMENT PROGRAM |
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Orimulsion, a bitumen-in-water emulsion produced in Venezuela, was
evaluated to provide a better understanding of the potential environmental
impacts associated with its use ...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION.: REPORT TO CONGRESS ON PHASE 1 OF THE ORIMULSION TECHNOLOGY ASSESSMENT PROGRAM (PROJECT SUMMARY) |
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Orimulsion, a bitumen-in-water emulsion produced in Venezuela, was
evaluated to provide a better understanding of the potential environmental
impacts associated with its use ...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION: REPORT TO CONGRESS ON PHASE 1 OF THE ORIMULSION TECHNOLOGY ASSESSMENT PROGRAM - VOLUME 1: EXECUTIVE SUMMARY, REPORT, AND APPENDICES |
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Orimulsion, a bitumen-in-water emulsion produced in Venezuela, was evaluated to provide a better understanding of the potential environmental impacts associated with its use as a f...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION: REPORT TO CONGRESS ON PHASE 1 OF THE ORIMULSION TECHNOLOGY ASSESSMERNT PROGRAM: VOLUME 1: |
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The report gives results of an evaluation of Orimulsion, a bitumen-in-water emulsion produced in Venezuela, to provide a better understanding of the potential environmental impacts...
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ENVIRONMENTAL IMPACTS OF THE USE OF ORIMULSION: REPORT TO CONGRESS ON PHASE 1 OF THE ORIMULSION TECHNOLOGY ASSESSMERNT PROGRAM: VOLUME 1: PROJECT REPORT/SUMMARY |
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PUB REPORT NRMRL-RTP-193a Miller*, C.A., Dreher, KL, Wentsel*, R., and Nadeau*, R.J. Environmental Impacts of the Use of Orimulsion: Report to Congress on Phase 1 of the Orimulsion...
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ENVIRONMENTAL INFLUENCES ON GENETIC DIVERSITY OF CREEK CHUBS IN THE MID-ATLANTIC REGION OF THE USA |
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Analysis of genetic diversity within and among populations of stream fishes may provide a powerful method for assessing the status and trends in the condition of aquatic ecosystems...
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ENVIRONMENTAL MONITORING AT GROUND ZERO AND LOWER MANHATTAN FOLLOWING THE COLLAPSE OF THE WTC |
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The U.S. EPA National Exposure Research Laboratory (NERL), in conjunction with our Regional offices, established a network of air monitoring sites to characterize ambient air con...
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ENVIRONMENTAL OUTLOOK 1978/79 |
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Projections of pollutants produced and released to air and to bodies of water, by Federal Region, from 1975 to 1990 are presented and discussed. These are projections of the Strate...
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ENVIRONMENTAL RESEARCH BRIEF: POLLUTION PREVENTION ASSESSMENT FOR A MANUFACTURER OF BOURBON WHISKEY |
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The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack ...
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ENVIRONMENTAL RESEARCH BRIEF: WASTE MINIMIZATION ASSESSMENT FOR A STEEL FABRICATOR |
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The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack ...
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ENVIRONMENTAL RESEARCH BRIEF: WASTE REDUCTION ACTIVITIES AND OPTIONS FOR A MANUFACTURER OF WIRE STOCK USED FOR PRODUCTION OF METAL ITEMS |
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The U.S. Environmental Protection Agency (EPA) funded a project with the New Jersey Department of Environmental Protection and Energy (NJDEPE) to assist in conducting waste minimiz...
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ENVIRONMENTAL RESEARCH BRIEF: WASTE REDUCTION ACTIVITIES AND OPTIONS FOR A MANUFACTURER OF WIRE STOCK USED FOR PRODUCTION OF METAL ITEMS. |
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The U.S. Environmental Protection Agency (EPA) funded a project with the New Jersey Department of Environmental Protection and Energy (NJDEPE) to assist in conducting waste minimiz...
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ENVIRONMENTAL STRESS AND RECOVERY: THE GEOCHEMICAL RECORD OF HUMAN DISTURBANCE IN NEW BEDFORD HARBOR AND APPONAGANSETT BAY, MASSACHUSETTS (USA) |
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To restore and maintain chemical, physical, and biological integrity of the nation's waters, knowledge of the characteristics of unimpaired water bodies and their watersheds is re...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT - REMOVAL OF PRECURSORS TO DISINFECTION BY-PRODUCTS IN DRINKING WATER, PCI MEMBRANE SYSTEMS FYNE PROCESS MODEL ROP 1434 WITH AFC-30 NANOFILTRATON AT BARROW, AK - NSF 00/19/EPADW395 |
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Equipment testing and verification of PCI Membrane Systems Inc. Fyne Process nanofiltraton systems Model ROP 1434 equipped with a C10 module containing AFC-30 tubular membranes was...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT ANR PIPELINE COMPANY PARAMETRIC EMISSIONS MONITORING SYSTEM (PEMS) |
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The Environmental Technology Verification report discusses the technology and performance of a gaseous-emissions monitoring system for large, natural-gas-fired internal combustion ...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT REMOVAL OF MERCURY FROM DENTAL OFFICE WASTEWATER |
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Verification testing of the DRNA Mercury Recovery Unit (MRU) was conducted during a seven-week period, at a dental office in Michigan that had three operatory rooms and two hygiene...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT REMOVAL OF PRECURSORS TO DISINFECTION BY-PRODUCTS IN DRINKING WATER |
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Equipment testing and verification of PCI Membrane Systems Inc. Fyne Process nanofiltration systems Model ROP 1434 equipped with a C10 module containing AFC-30 tubular membranes wa...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, HONEYWELL POWER SYSTEMS, INC. PARALLON 75 KW TURBOGENERATOR |
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The Environmental Technology Verification report discusses the technology and performance of the Parallon 75kW Turbogenerator manufactured by Honeywell Power Systems, Inc., formerl...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, HONEYWELL POWER SYSTEMS, INC. PARALLON 75 KW TURBOGENERATOR WITH CO EMISSIONS CONTROL |
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The Greenhouse Gas Technology Center (GHG Center), one of six verification organizations under the Environmental Technology Verification (ETV) program, evaluated the performance of...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, MARIAH ENERGY CORPORATION HEAT PLUS POWER SYSTEM |
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The Greenhouse Gas Technology Center (GHG Center) has recently evaluated the performance of the Heat PlusPower(TM) System (Mariah CDP System), which integrates microturbine technol...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT-INGERSOLL-RAND ENERGY SYSTEMS IR POWERWORKS(TM) 70 KW MICROTURBINE SYSTEM |
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The Environmental Technology Verification report discusses the technology and performance of the IR PowerWorks 70kW Microturbine System manufactured by Ingersoll-Rand Energy System...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: AISIN SEIKI 6.0 KW NATURAL-GAS-FIRED ENGINE COGENERATION UNIT |
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The U.S. EPA's Office of Research and Development operates the Environmental Technology Verification (ETV) program to facilitate the deployment of innovative technologies through p...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: COMM ENGINEERING, USA ENVIRONMENTAL VAPOR RECOVERY UNIT (EVRU) |
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This report documents the testing of a new technology that recovers and utilizes vapors from crude oil storage tanks employed in the oil production and processing industry. The COM...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: ENVIROFUELS DIESEL FUEL CATALYZER FUEL ADDITIVE |
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EPA's Environmental Technology Verification Program has tested EnviroFuels diesel fuel additive, called the Diesel Fuel Catalyzer. EnviroFuels has stated that heavy-duty on and off...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION, TEST REPORT OF MOBILE SOURCE EMISSIONS CONTROL DEVICES/CLEAN DIESEL TECHNOLOGIES FUEL BORNE CATALYST WITH CLEANAIR SYSTEM'S DIESEL OXIDATION CATALYST |
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The Environmental Technology Verification report discusses the technology and performance of the Fuel-Borne Catalyst with CleanAir System's Diesel Oxidation Catalyst manufactured b...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION, TEST REPORT OF MOBILE SOURCE EMISSIONS CONTROL DEVICES: CLEAN DIESEL TECHNOLOGIES FUEL-BORNE CATALYST WITH MITSUI/PUREARTH CATALYZED WIRE MESH FILTER |
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The Environmental Technology Verification report discusses the technology and performance of the Fuel-Borne Catalyst with Mitsui/PUREarth Catalyzed Wire Mesh Filter manufactured by...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION: JOINT (NSF-EPA) VERIFICATION STATEMENT AND REPORT FOR THE REMOVAL OF MERCURY FROM DENTAL OFFICE WASTEWATER, DENTAL RECYCLING OF NORTH AMERICA (DRNA) MERCURY REMOVAL UNIT (MRU). - NSF 02/01/EPAWQPC-SWP |
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Verification testing of the Dental Recycling North America (DRNA) Mercury Removal Unit (MRU) was conducted over a seven week period, at a dental office in Michigan that had three o...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION: JOINT (NSF-EPA) VERIFICATION STATEMENT AND REPORT FOR TREATMENT OF WASTEWATER GENERATED DURING DECONTAMINATION ACTIVITIES - ULTRASTRIP SYSTEMS, INC., MOBILE EMERGENCY FILTRATION SYSTEM (MEFS) - 04/14/WQPC-HS |
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Performance verification testing of the UltraStrip Systems, Inc., Mobile Emergency Filtration System (MEFS) was conducted under EPA's Environmental Technology Verification (ETV) Pr...
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ENVIRONMENTALLY FRIENDLIER ALTERNATIVES TO CHEMICAL TRANSFORMATIONS USING NON-TRADITIONAL APPROACHES |
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Environmentally Friendlier Synthetic Alternatives
Using Non-traditional Approaches
Rajender S. Varma
Synthetic organic transformations performed under non-traditio...
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ENVIRONMENTALLY FRIENDLIER ORGANIC TRANSFORMATIONS ON MINERAL SUPPORTS UNDER NON-TRADITIONAL CONDITIONS |
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Synthetic organic reactions performed under non-traditional conditions are gaining popularity primarily to circumvent the growing environmental concerns. A solvent-free approach th...
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ENVIRONMENTALLY FRIENDLIER ORGANIC TRANSFORMATIONS ON MINERAL SUPPORTS UNDER NON-TRADITIONAL CONDITIONS |
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Synthetic organic reactions performed under non-traditional conditions are gaining popularity primarily to circumvent the growing environmental concerns. A solvent-free approach th...
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ENVIRONMENTALLY FRIENDLIER ORGANIC TRANSFORMATIONS ON MINERAL SUPPORTS UNDER NONTRADITIONAL CONDITIONS |
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Synthetic organic reactions performed under non-traditional conditions are gaining popularity primarily to circumvent the growing environmental concerns. A solvent-free approach th...
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ENVIRONMENTALLY FRIENDLIER SYNTHESIS USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The diverse nature of chemical universe requires various 'greener' strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave...
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ENVIRONMENTALLY FRIENDLIER SYNTHETIC ALTERNATIVES USING NON-TRADITIONAL APPROACHES |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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ENVIRONMENTALLY-BENIGN MULTIPHASE CATALYSIS. (R826034) |
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Environmental concerns stemming from the use of conventional solvents and from hazardous waste generation have propelled research efforts aimed at developing benign chemical pro...
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ENZYMATIC COUPLING OF THE HERBICIDE BENTAZON WITH HUMUS MONOMERS AND CHARACTERIZATION OF REACTION PRODUCTS (R823847) |
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To elucidate the binding mechanism of the herbicide bentazon
(3-isopropyl-1H-2,1,3-benzothiadiazine-4(3H)-one 2,2-dioxide) with
humic monomers in the prese...
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ENZYME ACTIVITIES AND CARBON DIOXIDE FLUX IN A SONORAN DESERT URBAN ECOSYSTEM. (R827676) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EPA (ENVIRONMENTAL PROTECTION AGENCY) WORKSHOP ON GLOBAL ATMOSPHERIC CHANGE AND EPA PLANNING |
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Expanding industrial and agricultural growth are leading to greater emissions of many compounds that are changing the earth's atmosphere and climate. The changes are warming of the...
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EPA ORD RISK MANAGEMENT APPROACH TO DRINKING WATER RESEARCH |
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The approach to managing the risks associated with many environmental concerns has changed over the last five years with more emphasis being placed on integrating sound science int...
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EPA RESEARCH PROGRAM FOR REDUCING CO2 EMISSIONS THROUGH EFFICIENT ENERGY TECHNOLOGIES |
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The paper discusses EPA research in a number of areas that can potentially contribute to the ultimate reduction of global carbon dioxide (CO2) and other greenhouse gas emissions. t...
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EPA'S GLOBAL CLIMATE CHANGE PROGRAM -- GLOBAL LANDFILL METHANE |
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The paper discusses AEERL's research efforts on global landfill methane (CH4). H4 is of particular concern because its radiative forcing potential is thought to be much greater tha...
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EPA'S INDOOR AIR QUALITY AND WORK ENVIRONMENT STUDY: RELATIONSHIPS OF EMPLOYEE'S SELF-REPORTED HEALTHY SYMPTOMS WITH DIRECT INDOOR AIR QUALITY MEASUREMENTS |
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In recent years, employees at the three headquarters buildings of the U.S. Environmental Protection Agency (EPA) in the Washington, D.C. area have expressed concerns about air qual...
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EPA'S RESEARCH PROGRAM IN GRANULAR ACTIVATED CARBON |
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Research into Granular Activated Carbon (GAC) for use in drinking water treatment has a long history in the Drinking Water Research Division and its predecessor organizations. tudi...
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EPA'S STUDY OF THE GENERATION AND CONTROL OF AIR POLLUTANTS FROM THE COMBUSTION OF ORIMULSION |
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The paper discusses an EPA study of the grneration and control of air pollutants from the combustion of Orimulsion, a high-sulfur liquid petroleum fuel composed of approximately 70...
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EPA/IERL-RTP PROCEDURES MANUAL: LEVEL 2 SAMPLING AND ANALYSIS OF SELECTED REDUCED INORGANIC COMPOUNDS |
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The report describes Level 2 sampling and analysis procedures for determining emission rates of specific reduced inorganic compounds, including metal and non-metal hydrides, sulfid...
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EPA/NSF ETV Equipment Verification Testing Plan for the Removal of Volatile Organic Chemical Contaminants by Adsorptive Media Processes |
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This document is the Environmental Technology Verification (ETV) Technology Specific Test Plan (TSTP) for evaluation of drinking water treatment equipment utilizing adsorptive medi...
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EPAPUF: A BLOOD-GAS AND PULMONARY SIMULATOR - USER'S MANUAL - VERSION 1.0 |
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An iterative computerized classical physiological model of espiration and O2 transport has been written for simultaneous ariation of fractional inhaled oxygen (F1O2) and fractional...
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EPISODIC ACIDIFICATION OF STREAMS IN THE NORTHEASTERN UNITED STATES: CHEMICAL AND BIOLOGICAL RESULTS OF THE EPISODIC RESPONSE PROJECT |
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The Episodic Response Project (ERP) was funded by the U.S. Environmental Protection Agency (EPA) as part of the Aquatic Effects Research Program (AERP), which was established to st...
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EQUILIBRIUM ADSORPTION OF CHLOROPHENOLS ON GRANULAR ACTIVATED CARBON. (R825689C002) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EQUILIBRIUM ANALYSIS OF CARBON POOLS AND FLUXES OF FOREST BIOMES IN THE FORMER SOVIET UNION |
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Natural processes in ocean and terrestrial ecosystems together with human activities have caused a measurable increase in the atmospheric concentration of CO2. It is predicted that...
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EQUILIBRIUM PARTIONING AND BIOACCUMULATION OF SEDIMENT ASSOCIATED CONTAMINANTS BY INFAUNAL ORGANISMS |
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The utility and limits of applicability of a simple equilibrium partitioning model for predicting the maximum concentration of neutral organic compounds which can be accumulated by...
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EQUILIBRIUM-ANALYSIS OF PROJECT CLIMATE CHANGE EFFECTS ON THE GLOBAL SOIL ORGANIC MATTER POOL |
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Increased rates of soil organic matter decomposition may represent a significant positive feedback to global warming. s a step towards assessing the potential magnitude of this res...
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EQUIVALENCE OF ELEMENTAL CARBON BY THERMAL/OPTICAL REFLECTANCE AND TRANSMITTANCE WITH DIFFERENT TEMPERATURE PROTOCOLS. (R831086) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ESTABLISHING A SOIL CARBON BASELINE FOR CARBON ACCOUNTING THE FORESTED SOILS OF THE UNITED STATES |
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Soils are an important global reservoir of organic carbon (C). It has been estimated that at 1500 Pg world soils hold approximately three times the amount of C held in vegetation a...
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ESTABLISHING CHANGES IN METABOLISM OF CARBON TETRACHLORIDE IN THE PRESENCE OF TRICHLOROETHYLENE IN THE RAT THROUGH THE USE OF PHYSIOLOGICALLY BASED PHARMACOKINETIC (PBPK) MODELING |
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Toxicological interactions of chemicals can affect metabolism, often decreasing overall associated metabolic rates; and changes in metabolism can be evaluated through the use of ma...
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ESTABLISHMENT OF AN EASTERN VISIBILITY FINE PARTICLE NETWORK |
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A comprehensive assessment of eastern regional haze is being undertaken by EPA's Environmental Monitoring Systems Laboratory. An Eastern Visibility Fine Particle Network (EVFPN) is...
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ESTERIFICATION OF ACETIC ACID WITH ETHANOL IN CARBON DIOXIDE. (R826734) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ESTIMATES OF BIOMASS DENSITY FOR TROPICAL FORESTS |
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An accurate estimation of the biomass density in forests is a necessary step in understanding the global carbon cycle and production of other atmospheric trace gases from biomass b...
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ESTIMATES OF GLOBAL GREENHOUSE GAS EMISSIONS FROM INDUSTRIAL AND DOMESTIC WASTEWATER TREATMENT |
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The report summarizes the findings of field tests and provides emission factors for methane (CH4) and nitrous oxide (N2O) from wastewater treatment (WWT). It also includes country-...
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ESTIMATES OF REGIONAL NATURAL VOLATILE ORGANIC COMPOUND FLUXES FROM ENCLOSURES AND AMBIENT MEASUREMENTS |
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The paper gives results of an investigation of natural volatile organic compound (VOC) emissions at two forested sites in the southeastern U.S. he source distributions and emission...
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ESTIMATING COSTS OF GRANULAR ACTIVATED CARBON TREATMENT FOR WATER AND WASTEWATER |
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This report discusses design considerations and presents system module costs for conceptual cost estimating of granular activated carbon systems for water and wastewater treatment....
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ESTIMATING DISSOLVED ORGANIC CARBON PARTITION COEFFICIENTS FOR HYDROPHOBIC ORGANIC CHEMICALS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ESTIMATING DISSOLVED ORGANIC CARBON PARTITION COEFFICIENTS FOR NONIONIC ORGANIC CHEMICALS |
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A literature search was performed for dissolved organic carbon/water partition coefficients for nonionic chemicals (Kdoc) and Kdoc data was taken from more than sixty references. T...
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ESTIMATING GASEOUS EXCHANGES BETWEEN THE ATMOSPHERE AND PLANTS USING A COUPLED BIOCHEMICAL DRY DEPOSITION MODEL |
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To study gaseous exchanges between the soil, biosphere and atmosphere, a biochemical model was coupled with the latest version of Meyers Multi-Layer Deposition Model. The bioche...
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ESTIMATING PESTICIDE SORPTION COEFFICIENTS FOR SOILS AND SEDIMENTS |
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The organic carbon-referenced method of representing sorption of pesticides (K sub oc approach), including the assumptions inherent in the method and the implications of these assu...
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ESTIMATING PRODUCT YIELDS FROM THE ATMOSPHERIC PHOTOOXIDATION OF AMBIENT AIR ALKENES |
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The yields of products have been calculated from the reactions of hydroxyl radicals and ozone with 19 of the two through six carbon alkenes. he rates and mechanisms of these reacti...
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ESTIMATING ROOT RESPIRATION IN SPRUCE AND BEECH: DECREASES IN SOIL RESPIRATION FOLLOWING GIRDLING |
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A study was undertaken to follow seasonal fluxes of CO2 from soil and to estimate the contribution of autotrophic (root + mycorrhizal) to total soil respiration (SR) in a mixed sta...
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ESTIMATING THE GLOBAL POTENTIAL OF FOREST AND AGROFOREST MANAGEMENT PRACTICES TO SEQUESTER CARBON |
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Forests play a prominent role in the global C cycle. ccupying one-third of the earth's land area, forest vegetation nd soils contain about 60% of the total terrestrial C. Forest bi...
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ESTIMATING THE TERRESTIAL CARBON POOLS OF THE FORMER SOVIET UNION, CONTERMINOUS U.S., AND BRAZIL |
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Terrestrial-carbon (C) pool sizes are of interest in relation to quantifying current sources and sinks of C, and evaluating the possibilities for future C sequestration or release ...
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ESTIMATION OF LEAF AREA INDEX IN OPEN-CANOPY PONDEROSA PINE FORESTS AT DIFFERENT SUCCESSIONAL STAGES AND MANAGEMENT REGIMES IN OREGON. (R828309) |
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AbstractLeaf area and its spatial distribution are key parameters in describing canopy characteristics. They determine radiation regimes and influence mass and energy e...
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ESTIMATION OF PARAMETERS FOR MODELING THE BEHAVIOR OF SELECTED PESTICIDES AND ORTHOPHOSPHATE |
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A 3-year laboratory study was conducted to determine sorption and degradation of selected pesticides as well as sorption of orthophosphorus on several U.S. agricultural soils. The ...
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ESTUARINE PALEOPRODUCTIVITY: A COMPARISON OF THREE INDICATORS |
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Studies of paleoproductivity have documented anthropogenic impacts on lakes and estuaries - but use of multiple measures of productivity is rare. We compare three measures used as ...
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ETV REPORT: REMOVAL OF CHEMICAL CONTAMINANTS IN DRINKING WATER — ECOWATER SYSTEMS, INC. ERO-R450E WATER TREATMENT SYSTEM |
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The EcoWater Systems ERO-R450E POU drinking water treatment system was tested for removal of aldicarb, benzene, cadmium, carbofuran, cesium, chloroform, dichlorvos, dicrotophos, fe...
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ETV REPORT: REMOVAL OF CHEMICAL CONTAMINANTS IN DRINKING WATER — PALL/KINETICO PUREFECTA DRINKING WATER TREATMENT SYSTEM |
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The Pall/Kinetico Purefecta™ POU drinking water treatment system was tested for removal of aldicarb, benzene, cadmium, carbofuran, cesium, chloroform, dichlorvos, dicrotophos,...
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ETV REPORT: REMOVAL OF CHEMICAL CONTAMINANTS IN DRINKING WATER – WATTS PREMIER INC. WP-4V DRINKING WATER TREATMENT SYSTEM |
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The Watts Premier WP-4V POU drinking water treatment system was tested for removal of aldicarb, benzene, cadmium, carbofuran, cesium, chloroform, dichlorvos, dicrotophos, fenamipho...
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ETV TEST REPORT OF MOBILE SOURCE EMISSIONS CONTROL DEVICES: LUBRIZOL ENGINE CONTROL SYSTEMS PURIFILTER SC17L |
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The Environmental Technology Verification report discusses the technology and performance of the Lubrizol Engine Control Systems Purifilter SC17L manufactured by Lubrizol Engine Co...
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ETV/COMBINED HEAT AND POWER AT A COMMERCIAL SUPERMARKET CAPSTONE 60 KW MICROTURBINE SYSTEM |
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The Environmental Technology Verification report discusses the technology and performance of the Capstone 60 Microturbine CHP System manufactured by Capstone Microturbine Corporati...
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EVALUATING AND OPTIMIZING ELECTRON MICROSCOPE METHODS FOR CHARACTERIZING AIRBORNE ASBESTOS |
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Evaluation of EM methods for measuring airborne asbestos fiber concentrations and size distributions was carried out by studying a large number of variables and subprocedures in a ...
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EVALUATING BENCH-SCALE NANOFILTRATION STUDIES FOR PREDICTING FULL-SCALE PERFORMANCE |
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The Information Collection Rule (ICR) requires water utilities of a certain size and water quality to conduct bench or pilot testing of either granular activated carbon or membrane...
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EVALUATING CAPACITIES OF GAC PRELOADED WITH NATURAL WATER |
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Adsorption studies were conducted to determine how preloading a natural groundwater onto GAC affects the adsorption of cis-1,2-dichloroethene in small-scale and pilot-scale columns...
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EVALUATING FIELD SCALE GAC (GRANULATED ACTIVATED CARBON) SYSTEMS FOR DRINKING WATER |
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The paper analyzes granular activated carbon (GAC) systems under field conditions and compares the various factors affecting operations. A technique for predicting GAC performance ...
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EVALUATING MULTICOMPONENT COMPETITIVE ADSORPTION IN FIXED BEDS |
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An equilibrium column model (ECM) was developed to evaluate multicomponent competition in fixed-bed adsorption columns. The model ignores mass transfer resistances and uses ideal a...
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EVALUATING NATURAL BIODEGRADATION OF MTBE AT MULTIPLE UST SITES |
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Until very recently, methyl t-butyl ether (MTBE) was considered non-biodegradable in the subsurface. This has been an impediment in applying remediation by natural attenuation (R...
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EVALUATING THE COST AND PERFORMANCE OF FIELD-SCALE GRANULAR ACTIVATED CARBON SYSTEMS |
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Many organic compounds in water supplies are resistant to conventional treatment, and many others are toxic or nuisances. Low concentrations of organic contaminants are not readily...
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EVALUATING THE COSTS OF PACKED-TOWER AERATION AND GAC FOR CONTROLLING SELECTED ORGANICS |
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This article focuses on a preliminary cost analysis that compares liquid-phase granular activated carbon (GAC) treatment with packed-tower aeration (PTA) treatment, with and withou...
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EVALUATING THE COSTS OF PACKED-TOWER AERATION AND GAC FOR CONTROLLING SELECTED ORGANICS |
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This article focuses on a preliminary cost analysis that compares liquid-phase granular activated carbon (GAC) treatment with packed-tower aeration (PTA) treatment, with and withou...
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EVALUATING THE RESULTS OF INFRARED FURNACE REACTIVATION |
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Because of the 1986 Amendments to the Safe Drinking Water Act, many utilities are facing possible implementation of granular activated carbon (GAC) adsorption technology to meet re...
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EVALUATING THE ROLE OF HABITAT QUALITY ON ESTABLISHMENT OF GM AGROSTIS STOLONIFERA IN NON-AGRONOMIC ENVIRONMENTS |
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The initial flowering of experimental fields of the GM wind-pollinated plant Agrostis stolonifera L. that expressed an engineered gene (CP4 EPSPS) for resistance to glyphosa...
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EVALUATING THE USE OF GRANULAR ACTIVATED CARBON AT PASSAIC VALLEY, NEW JERSEY |
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An 11,500 cu m/day (3MGD) side stream of treated Passaic River water was routed to three pressure vessels in parallel, each containing a different commercial brand of granular acti...
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EVALUATION OF A FTIR SOURCE MEASUREMENT SYSTEM |
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An initial evaluation was made of a prototype Fourier transform infrared spectrometer on its ability to measure mobile source emissions. This prototype represents the commercializa...
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EVALUATION OF A NOVEL CARBON ADSORBENT FOR FRACTIONATION AND TREATMENT OF HALOGENATED ORGANIC WASTES. (R825549C011) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EVALUATION OF A PASSIVE MONITOR FOR VOLATILE ORGANICS |
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A laboratory investigation was conducted to determine the potential utility of a commercially available passive dosimeter for monitoring toxic volatile organic compounds at ambient...
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EVALUATION OF A PROPORTIONAL SAMPLER FOR AUTOMOTIVE EXHAUST EMISSIONS |
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A test program was conducted to evaluate a proportional sampler for use in automotive exhaust gas emissions research. Automobile emissions test results obtained using the proportio...
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EVALUATION OF A REMOTE SENSOR FOR MOBILE SOURCE CO EMISSIONS |
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Carbon monoxide (CO) emission measurements of thousands of vehicles per day are possible with a recently evaluated remote sensor developed at the University of Denver. unded by the...
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EVALUATION OF A SAMPLING AND ANALYSIS METHOD FOR DETERMINATION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR |
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General Metals Works PS-1 PUF air samplers and an analytical method based on high esolution gas chromatography - high resolution mass spectrometry (HRGC-HRMS) were valuated for det...
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EVALUATION OF A SORBEN-BASED PRECONCENTRATED FOR ANALYSIS OF VOCS IN AIR USING GAS CHROMATOGRAPHY-ATOMIC EMISSION DETECTION |
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This work establishes design parameters for the use of carbon-based multisorbent tubes used as preconcentrators of volatile organic compounds when sampling ambient air. he multisor...
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EVALUATION OF AN S2 SAMPLER FOR RECEPTOR MODELING OF WOODSMOKE EMISSIONS |
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The Source Signature (squared S) sampler was developed to characterize the carbon (C) and elemental components in fine particulate emissions from a residential wood burner. The hot...
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EVALUATION OF ANAEROBIC, EXPANDED-BED CONTRACTORS FOR MUNICIPAL WASTEWATER TREATMENT |
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The anaerobic expanded-bed contactors for treating dilute municipal wastes were evaluated. A 334-liter diatomaceous earth, a 334 liter granular activated carbon, a set of two 66-li...
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EVALUATION OF BIOLOGICAL TREATMENT OF PHARMACEUTICAL WASTEWATER WITH PAC (POWDERED ACTIVATED CARBON) ADDITION. VOLUME 1 |
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A lack of information on applicable removal technologies for total chemical oxygen demand (TCOD) prevented promulgation of best available technology economically achievable (BAT) l...
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EVALUATION OF BIOLOGICAL TREATMENT OF PHARMACEUTICAL WASTEWATER WITH PAC (POWDERED ACTIVATED CARBON) ADDITION. VOLUME 2. APPENDICES |
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A lack of information on applicable removal technologies for total chemical oxygen demand (TCOD) prevented promulgation of best available technology economically achievable (BAT) l...
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EVALUATION OF CARBON BLACK SLURRIES AS CLEAN BURNING FUELS |
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The paper describes the results of the combustion of carbon black slurries. (NOTE: The Hydrocarb process is being evaluated as a method of producing methanol hydrogen-rich fuel gas...
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EVALUATION OF CARBON FOR REMOVAL AND DESTRUCTION OF POLYCHLORINATED BIPHENYLS (PCBS). (R825549C011) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EVALUATION OF CHEMICAL REACTION MECHANISMS FOR PHOTOCHEMICAL SMOG. PART 1. MECHANISM DESCRIPTIONS AND DOCUMENTATION |
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Documentation on six chemical kinetics mechanisms that have been developed to describe photochemical smog formation is provided. The six mechanisms are (1) the Carbon Bond Mechanis...
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EVALUATION OF CONTAINMENT AND CONTROL OPTIONS FOR METHYL BROMIDE IN COMMODITY TREATMENT |
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The report gives results of an investigation of means for methyl bromide (MeBr) recovery, reuse, and destruction to prevent atmospheric emissions if its limited use were still allo...
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EVALUATION OF CONTINUOUS MONITORS FOR CARBON MONOXIDE IN STATIONARY SOURCES |
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The performance characteristics of five commercially available continuous carbon monoxide monitors were evaluated in a two part program consisting of laboratory and field phases. T...
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EVALUATION OF CONTROL STRATEGIES FOR VOLATILE ORGANIC COMPOUNDS IN INDOOR AIR |
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The Air and Energy Engineering Research Laboratory of the U.S. Environmental Protection Agency (U.S. EPA) conducts and sponsors research on technology to reduce or eliminate emissi...
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EVALUATION OF CORROSION ISSUES FOR NANOFILTRATION TREATED WATER |
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Nanofiltration membranes are known to remove a large percentage of naturally occurring organics. emovals are often higher than 90 percent. his is also true for disinfection byprodu...
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EVALUATION OF DRINKING WATER TREATMENT TECHNOLOGIES FOR REMOVAL OF ENDOCRINE DISRUPTING CHEMICALS (EDCS) |
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A number of the chemicals identified as potential EDCs have been observed in surface and ground waters leading to concern over the possible presence of EDCs in finished drinking wa...
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EVALUATION OF DRINKING WATER TREATMENT TECHNOLOGIES FOR REMOVAL OF ENDOCRINE DISRUPTING COMPOUNDS |
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Many of the chemicals identified as potential endocrine disrupting compounds (EDCs) may be present in surface or ground waters used as drinking water sources due to their introdu...
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EVALUATION OF DRINKING WATER TREATMENT TECHNOLOGIES FOR REMOVAL OF ENDOCRINE DISRUPTORS |
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Evaluation of Drinking Water Treatment Technologies for Removal of Endocrine Disruptors. Schenck, K*, Speth, T, U.S. EPA, Cincinnati, OH, USA, Rosenblum, L, Wendelken, S, Pepich, ...
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EVALUATION OF EMISSION TEST METHODS FOR HALOGENATED HYDROCARBONS. VOLUME I, CC14, C2H4C12, C2C14, AND C2HC13 |
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A test method for halogenated hydrocarbons has been evaluated and information is provided for the user. Four compounds were investigated, carbon tetrachloride, ethylene dichloride,...
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EVALUATION OF EMISSIONS FROM MASONRY HEATERS AND MASONRY FIREPLACES IN HOMES |
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The paper reports results of the first in-home evaluation of emissions from masonry fireplaces and heaters. Five conventional masonry fireplaces and two advanced-technology Rosin m...
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EVALUATION OF FULL SCALE ACTIVATED SLUDGE SYSTEMS UTILIZING POWDERED ACTIVATED CARBON ADDITION WITH WET AIR REGENERATION |
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The addition of powdered activated carbon (PAC) to activated sludge systems is a proven method of wastewater treatment. Of eleven POTWs in the U.S. that were designed for PAC use, ...
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EVALUATION OF GAC (GRANULAR ACTIVATED CARBON) PERFORMANCE AND ON-SITE REACTIVATION AT THE MANCHESTER, NH. WATER TREATMENT PLANT |
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The performance and cost of reactivating granular activated carbon at a fluidized bed reactivation system was studied. The feasibility of on-site reactivation, as well as regionali...
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EVALUATION OF GAS CHROMATOGRAPHY DETECTION SYSTEMS FOR TOTAL GASEOUS NONMETHANE ORGANIC COMPOUNDS |
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Better characterization and control of emissions from stationary sources of compounds under the Clean Air Act Amendments of 1990, Title I could be met by a continuous or semi-conti...
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EVALUATION OF INHALATION HAZARD OF ORGANIC CHEMICAL AIR CONTAMINANTS |
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The potential health hazards of exposure to threshold limit value (TLV) concentrations of acetaldehyde, acrolein, propylene oxide, chloroform, methyl chloroform, carbon tetrachlori...
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EVALUATION OF INNOVATIVE PAINTING PROCESSES |
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The report gives results of an evaluation of two novel spray painting techniques that may decrease volatile organic compound (VOC) emissions associated with the application of surf...
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EVALUATION OF INTACT SOIL-CORE MICROCOSMS FOR DETERMINING POTENTIAL IMPACTS ON NUTRIENT DYNAMICS BY GENETICALLY ENGINEERED MICROORGANISMS |
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Nutrient export from intact soil-core microcosms in leachate or by plant uptake was evaluated as a means to assess the ecosystem impacts from the environmental release of genetical...
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EVALUATION OF LEACHATE TREATMENT. VOLUME II. BIOLOGICAL AND PHYSICAL-CHEMICAL PROCESSES |
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A completely mixed anaerobic filter was found to effectively remove organic matter concentrations in high-strength solid waste leachate over a range of organic loadings and shocklo...
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EVALUATION OF MEASUREMENT TECHNIQUES AND CONTAINMENT FOR THE BACILLUS ANTHRACIS FUMIGANT CHLORINE DIOXIDE |
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Chlorine dioxide (ClO2) has been demonstrated to be an effective fumigant to inactivate B. anthracis spores. However, to ensure its proper use, it must be measured accurately, and...
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EVALUATION OF METHODOLOGY FOR DETERMINATION OF POLYHALOGENATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR |
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General Metals works PS-1 PUF air samplers and an analytical method based on high resolution gas chromatography - high resolution mass spectrometry (HRGC-HRMS) were evaluated for d...
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EVALUATION OF METHODS USED TO DESORB THE CONSTITUENTS ADSORBED ON THE CHARCOAL CONTAINED IN AUTOMOTIVE EVAPORATIVE CANISTERS |
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This report presents the conclusion of a two-part study with evaluated current extraction methods for anaylizing in automobiles. The second part of this study investigated the use ...
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EVALUATION OF METHODS USED TO DESORB THE CONSTITUENTS ADSORBED ON THE CHARCOAL CONTAINED IN AUTOMOTIVE EVAPORATIVE CANISTERS--PART II |
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This report presents the conclusion of a two-part study with evaluated current extraction methods for anaylizing in automobiles. The second part of this study investigated the use ...
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EVALUATION OF NITROGEN OXIDE EMISSIONS DATA FROM TVA COAL-FIRED BOILERS |
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The report gives results of a study during which nitrogen oxide (NOx) emission rates from 30 boilers at 11 TVA coal-fired plants were calculated and compared with the calculated ra...
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EVALUATION OF PARAMETERS AFFECTING ACTIVATED CARBON ADSORPTION OF A SOLVENT-LADEN AIR STREAM |
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As part of EPA's continuing research on methods to control volatile organic compound emissions, a vapor-phase activated carbon pilot plant has been constructed. The automated, comp...
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EVALUATION OF PARTS-PER-BILLION (PPB) ORGANIC CYLINDER GASES FOR USE AS AUDITS DURING HAZARDOUS WASTE TRIAL BURN TESTS |
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A repository of 14 gaseous organic compounds at parts-per-billion levels (7-430 ppb) in compressed gas cylinders has been established by the Environmental Protection Agency. This r...
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EVALUATION OF POLYESTER AND METALLIZED-POLYETHYLENE FILMS FOR CHEMICAL PROTECTIVE CLOTHING APPLICATIONS |
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The permeation resistance of thin polyester films and metallized, low-density polyethylene (LDPE) films was evaluated to assess their feasibility for use in chemical protective clo...
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EVALUATION OF PORTABLE MULTISORBEN AIR SAMPLERS FOR USE WITH AN AUTOMATED MULTITUDE ANALYZER |
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The objective of this study was to evaluate the operational characteristics of the Perkin-Elmer Model STS 25 Sequential Tube Sampler and IITRI/IIT (IIT Research Institute/Illinois ...
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EVALUATION OF POTENTIAL CONFOUNDING FACTORS IN SEDIMENT TOXICITY TESTS WITH THREE FRESHWATER BENTHIC INVERTEBRATES |
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We examined the effects of natural sediment physicochemical properties on the results of lab tests with the amphipod Hyalella azteca, the midge Chironomus tentans, and the olieocha...
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EVALUATION OF POWDERED ACTIVATED CARBON FOR REMOVAL OF TRACE ORGANICS AT NEW ORLEANS, LOUISIANA |
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This research effort studied the effect of powdered activated carbon on the removal of trace organics in the water treatment process at New Orleans, LA. The water treatment process...
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EVALUATION OF PRECISION OF EPA METHODS 3A, 6C, AND 7E |
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The U.S. EPA sponsored a study to estimate the precision (repeatability and reproducibility) and systematic error of EPA Test Methods 3A, 6C, and 7E. hese are instrumental methods ...
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EVALUATION OF PRISTINE LIGNIN FOR HAZARDOUS WASTE TREATMENT |
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A feasibility study was conducted to assess the utilization of lignin, isolated from a steam-exploded hardwood (Tulip poplar) with 95% ethanol and 0.1n NaOH, as a potential adsorbe...
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EVALUATION OF PROCEDURES TO DESORB BACTERIA FROM GRANULAR ACTIVATED CARBON |
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Physical, chemical, and enzymatic means for the desorption of micro-organisms from granular activated carbon (GAC) were assessed. Data indicate that homogenization at 16,000 rpm fo...
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EVALUATION OF SECONDARY ORGANIC AEROSOL FORMATION IN WINTER. (R823514) |
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Three different methods are used to predict secondary organic aerosol (SOA)
concentrations in the San Joaquin Valley of California during the winter of 1995-1996 [Integrated
...
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EVALUATION OF SELECTED GASEOUS HALOCARBONS FOR USE IN SOURCE TEST PERFORMANCE AUDITS |
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A repository of 38 gaseous organic compounds in compressed gas cylinders has been established by the U.S. Environmental Protection Agency. This repository was established to provid...
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EVALUATION OF SIMULTANEOUS SO2/NOX CONTROL TECHNOLOGY |
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The report gives results of work concentrating on characterizing three process operational parameters of a technology that combines sorbent injection and selective non-catalytic re...
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EVALUATION OF SOLID ADSORBENTS FOR THE COLLECTION AND ANALYSES OF AMBIENT BIOGENIC VOLATILE ORGANICS |
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Micrometeorological flux measurements of biogenic volatile organic compounds (BVOCs) usually require that large volumes of air be collected (whole air samples) or focused during ...
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EVALUATION OF SUPERCRITICAL CARBON DIOXIDE TECHNOLOGY TO REDUCE SOLVENT IN SPRAY COATING APPLICATIONS |
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This evaluation, part of the Pollution Prevention Clean Technology Demonstration (CTD) Program, addresses the product quality, waste reduction, and economic issues of spray paint a...
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EVALUATION OF SUPERCRITICAL CARBON DIOXIDE TECHNOLOGY TO REDUCE SOLVENT IN SPRAY COATING APPLICATIONS |
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This evaluation, part of the Pollution Prevention Clean Technology Demonstration (CTD) Program, addresses the product quality, waste reduction, and economic issues of spray paint a...
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EVALUATION OF SUPERCRITICAL CO2 SPRAY TECHNOLOGY AS A COST EFFECTIVE APPROACH TO REDUCTION OF SOLVENTS IN WOOD FINISHING |
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Product quality, waste reduction, and economic issues were evaluated for a spray paint application technology using supercritical carbon dioxide to replace some of the solvent in a...
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EVALUATION OF THE ACCEPTABILITY OF NATURAL GAS AS A MITIGATING FUEL FOR UTILITY COMBUSTION SOURCES |
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The paper gives preliminary findings of a joint EPA/Gas Research Institute study of methane (CH4) loss from the U.S. natural gas industry. he study, not scheduled for completion un...
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EVALUATION OF THE COMMUNITY MULTISCALE AIR QUALITY (CMAQ) MODEL VERSION 4.5: UNCERTAINTIES AND SENSITIVITIES IMPACTING MODEL PERFORMANCE: PART II - PARTICULATE MATTER |
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This paper presents an analysis of the CMAQ v4.5 model performance for particulate matter and its chemical components for the simulated year 2001. This is part two is two part ser...
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EVALUATION OF THE EFFECTIVENESS OF GRANULAR ACTIVATED CARBON ADSORPTION AND AQUACULTURE FOR REMOVING TOXIC COMPOUNDS FROM TREATED PETROLEUM REFINERY EFFLUENTS |
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Activated carbon adsorption isotherms of prepared aqueous solutions of toluene, 2,4-dimethyl phenol, naphthalene, benzo(a)pyrene, chrysene, pyrene, acenaphthene, phenanthrene, fluo...
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EVALUATION OF THE EFFICIENCY OF INDUSTRIAL FLARES: INFLUENCE OF GAS COMPOSITION |
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The report gives results of a pilot-scale evaluation of the efficiency of industrial flares. The work (1) evaluated the effects of additional gas mixtures on flare stability and ef...
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EVALUATION OF THE HEALTH RISKS ASSOCIATED WITH THE TREATMENT AND DISPOSAL OF MUNICIPAL WASTEWATER AND SLUDGE |
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In this study, started in 1977, clinical and serologic evaluations of workers involved in composting of wastewater treatment plant sludge by the aerated pile method was initiated t...
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EVALUATION OF THE MIDDAS SYSTEM FOR DESIGNING GAC ADSORBERS |
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The Micro-Diameter-Depth Adsorption System (MIDDAS) was evaluated for its usefulness in determining equilibrium parameters for adsorption in granular activated carbon (GAC) systems...
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EVALUATION OF THE MIDDAS SYSTEM FOR DESIGNING GAC ADSORBERS |
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The Micro-Diameter-Depth Adsorption System (MIDDAS) was evaluated for its usefulness in determining equilibrium parameters for adsorption in granular activated carbon (GAC) systems...
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EVALUATION OF THE NEPHROTOXICITY OF COMPLEX MIXTURES CONTAINING ORGANICS AND METALS: ADVANTAGES AND DISADVANTAGES OF THE USE OF REAL-WORLD COMPLEX MIXTURES |
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The nephrotoxicity of complex industrial waste mixtures and a chemically-characterized synthetic chemical mixture are described and reviewed, respectively. dult, male F-344 rats we...
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EVALUATION OF THE POLYAD FB AIR PURIFICATION AND SOLVENT RECOVERY PROCESS FOR STYRENE REMOVAL |
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The report gives results of a study evaluating the Polyad fluidized-bed (FB) process for controlling styrene emissions at a representative fiberglass shower stall and bath tub manu...
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EVALUATION OF THE POLYAD FB AIR PURIFICATION AND SOLVENT RECOVERY PROCESS FOR STYRENE REMOVAL |
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The report gives results of a study evaluating the Polyad fluidized-bed (FB) process for controlling styrene emissions at a representative fiberglass shower stall and bath tub manu...
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EVALUATION OF THE POTENTIAL CARCINOGENICITY OF CADMIUM (7740-43-9), CADMIUM ACETATE (543-90-8), CADMIUM BROMIDE (7789-42-6), AND CADMIUM CHLORIDE (10108-64-2) |
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Cadmium is a probable human carcinogen, classified as weight-of-evidence Group B1 under the EPA Guidelines for Carcinogen Risk Assessment (U.S. EPA, 1986a)- Evidence on potential c...
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EVALUATION OF THE POTENTIAL CARCINOGENICITY OF CARBON TETRACHLORIDE |
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Carbon tetrachloride is a probable human carcinogen, classified as weight-of-evidence Group B2 under he EPA Guidelines for Carcinogen Risk Assessment (U.S. EPA, 1986a).Evidence on ...
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EVALUATION OF THE REMOVAL OF ESTROGENS THROUGH THE COAGULATION PROCESS |
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A number of estrogenic compounds have been shown to be present in surface waters in the U.S. These compounds have the potential to act as potent endocrine disrupting chemicals (EDC...
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EVALUATION OF THE REMOVAL OF ESTROGENS THROUGH THE COAGULATION PROCESS |
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A number of estrogenic compounds have been shown to be present in surface waters in the U.S. These compounds have the potential to act as endocrine disrupting chemicals (EDCs), lea...
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EVALUATION OF THE REMOVAL OF ESTROGENS THROUGH THE COAGULATION PROCESS |
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A number of estrogenic compounds have been shown to be present in surface waters in the U.S. These compounds have the potential to act as potent endocrine disrupting chemicals (ED...
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EVALUATION OF THE REMOVAL OF ESTROGENS THROUGH THE COAGULATION PROCESS - PAPER |
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A number of estrogenic compounds have been shown to be present in surface waters in the U.S. These compounds have the potential to act as potent endocrine disrupting chemicals (EDC...
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EVALUATION OF THE REMOVAL OF ETHYNYLESTRADIOL BY GRANULAR ACTIVATED CARBON TREATMENT |
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Ethynylestradiol (EE2), the synthetic estrogen used in oral contraceptives, has been shown to be present in surface waters due to its introduction from domestic sewage treatment sy...
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EVALUATION OF THE RESISTANCE OF A CHLORINATED POLYETHYLENE PROTECTIVE GARMENT MATERIAL TO PERMEATION AND DEGRADATION BY LIQUID CHEMICALS |
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The objectives of the project was to investigate existing permeation and degradation resistance data for chlorinated polyethylene (CPE); to develop a laboratory test plan consisten...
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EVALUATION OF THE SODIUM ARSENITE METHOD FOR MEASUREMENT OF NO2 IN AMBIENT AIR |
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The sodium arsenite method for measurement of nitrogen dioxide in ambient air was evaluated. The method has a constant-high collection efficiency (82%) for nitrogen dioxide, and is...
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EVALUATION OF THE ULTRAVIOLET-OZONE AND ULTRAVIOLET-OXIDANT TREATMENT OF PINK WATER |
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Pink water, a solution of trinitrotoluene (TNT) and other nitrobodies, is a major pollutant at ammunition plants engaged either in the manufacture of TNT or in the loading, assembl...
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EVALUATION OF THE UNION CARBIDE PURASIV (TRADE NAME) HR VAPOR RECOVER SYSTEM |
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The goal of this study was to perform an engineering evaluation of a new fluidized-bed adsorption technology that was developed in Japan. This technology has been licensed by Union...
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EVALUATION OF TOXIC EFFECTS OF ORGANIC CONTAMINANTS IN RECYCLED WATER |
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The report represents the results of a comprehensive series of toxicological studies designed to evaluate the health effects of the application of recycled water for drinking purpo...
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EVALUATION OF TOXICS IN RUNOFF FROM COATED SURFACES |
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Presented in this paper are results from a field and laboratory study of the potential runoff toxicity from coated surfaces. The study results qualified and quantified the types an...
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EVALUATION OF UNSATURATED/VADOSE ZONE MODELS FOR SUPERFUND SITES |
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Mathematical models of water and chemical movement in soils are being used as decision aids for defining groundwater protection practices for Superfund sites. Numerous transport mo...
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EVALUATION OF UNSATURATED/VADOSE ZONE MODELS FOR SUPERFUND SITES |
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Mathematical models of water and chemical movement in soils are being used as decision aids for defining groundwater protection practices for Superfund sites. umerous transport mod...
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EVALUATION OF VOC (VOLATILE CARBON) EMISSIONS FROM WASTEWATER SYSTEMS (SECONDARY EMISSIONS) |
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The technical objective of this project was to obtain data for evaluating volatile carbon (VOC) emissions from wastewater treatment facilities for the synthetic organic chemicals m...
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EVALUATION OF WATERBORNE RADON IMPACT ON INDOOR AIR QUALITY AND ASSESSMENT OF CONTROL OPTIONS |
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This research program was conducted with two objectives: (1) evaluation of waterborne radon impacts on indoor air quality, and (2) assessment of available control technologies to l...
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EVIDENCE FOR MICROBIAL ENHANCED ELECTRICAL CONDUCTIVITY IN HYDROCARBON-CONTAMINATED SEDIMENTS |
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Electrical conductivity of sediments during microbial mineralization of diesel was investigated in a mesoscale column experiment consisting of biotic contaminated and uncontaminate...
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EVIDENCE FOR THE ROLE OF COPPER IN THE INJURY PROCESS OF COLIFORM BACTERIA IN DRINKING WATER |
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Low levels of copper in chlorine-free distribution water caused injury of coliform populations. Monitoring of 44 drinking water samples indicated that 64% of the coliform populatio...
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EVIDENCE OF ENHANCED WEATHERING IN SOILS EXPOSED TO ELEVATED CARBON DIOXIDE CONCENTRATIONS. (U915625) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EXPERIENCES IN OPERATING A FULL-SCALE GRANULAR ACTIVATED-CARBON SYSTEM WITH ON-SITE REACTIVATION |
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Granular activated-carbon systems were studied in two modes. In the first mode, the systems were acting as a combined filter and adsorber and the filter beds are referred to as a s...
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EXPERIENCES WITH GRANULAR ACTIVATED CARBON FILTRATION ON-SITE REACTIVATION AT JEFFERSON PARISH, LOUISIANA |
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Under a jointly funded cooperative agreement with U.S. EPA, three 1-mgd granular activated carbon (GAC) adsorbers and a reactivation pilot facility were constructed at Jefferson Pa...
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EXPERIMENTAL ACIDIFICATION OF A STREAM TRIBUTARY TO HUBBARD BROOK |
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Long (5 mo.) and short-term (1 h to 2 days) effects of acidic pH have been measured in a poorly buffered mountain stream within the Hubbard Brook Experimental Forest, New Hampshire...
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EXPERIMENTAL DESIGN AND INSTRUMENTATION FOR A FIELD EXPERIMENT |
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This report concerns the design of a field experiment for a military setting in which the effects of carbon monoxide on neurobehavioral variables are to be studied. ield experiment...
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EXPERIMENTAL EVALUATION OF FUEL OIL ADDITIVES FOR REDUCING EMISSIONS AND INCREASING EFFICIENCY OF BOILERS |
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The report gives results of an evaluation of the effectiveness of combustion-type fuel oil additives to reduce emissions and increase efficiency in a 50-bhp (500 kw) commercial oil...
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EXPERIMENTAL INVESTIGATION OF PIC FORMATION IN CFC-12 INCINERATION |
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The report gives results of experiments to determine the effect of flame zone temperature on gas-phase flame formation and destruction of products of incomplete combustion (PICS) d...
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EXPERIMENTAL MEASUREMENT AND MODELING OF THE VAPOR-LIQUID EQUILIBRIUM OF CARBON DIOXIDE + CHLOROFORM. (R826734) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EXPERIMENTAL PONDS FOR EVALUATING BIOASSAY PREDICTIONS |
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Experimental pond studies were used to demonstrate a means of assessing the accuracy of laboratory and in situ bioassays predicting the effects of chemical stress on phytoplankton....
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EXPLORATORY ANALYSIS OF THE EFFECTS OF PARTICULATE CHARACTERISTICS ON THE VARIATION IN PARTITIONING OF NONPOLAR ORGANIC CONTAMINANTS TO MARINE SEDIMENTS |
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The partitioning of nonpolar organic contaminants to marine sediments is considered to be controlled by the amount of organic carbon present. However, several studies propose that ...
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EXPOSURE ESTIMATES FOR THE HOUSTON AREA ASTHMA STUDY |
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Procedures for determining exposure estimates for the Houston Area Asthma Study are discussed. Two residential clusters of asthmatics in the Houston area have been studied as part ...
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EXPOSURE TO PARTICULATE MATTER, VOLATILE ORGANIC COMPOUNDS, AND OTHER AIR POLLUTANTS INSIDE PATROL CARS |
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People driving in a vehicle might receive an enhanced dose of mobile source pollutants that are considered a potential risk for cardiovascular diseases. The exposure to components ...
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EXTENDED ALKYLATE PRODUCTION ACTIVITY DURING FIXED-BED SUPERCRITICAL 1-BUTENE/ISOBUTANE ALKYLATION ON SOLID ACID CATALYSTS USING CARBON DIOXIDE AS DILUENT. (R824729) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EXTENT OF OZONE'S REACTION WITH ISOLATED AQUATIC FULVIC ACID |
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Samples of North Carolina aquatic fulvic acid were ozonated in a neutral buffer at several ozone/carbon ratios, and the reaction mixtures were characterized by using total organic ...
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EXTRACELLULAR ENZYME ACTIIVTY AS A SURROGATE FOR NUTRIENTS AND NUTRIENT HISTORY IN GREAT LAKES WETLANDS |
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Great Lakes ecosystems are generally thought to be P-limited, but N-limitation may be more common than previously suspected. N-limitation should be most obvious in freshwater coas...
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EXTRACTION METHODS FOR RECOVERY OF VOLATILE ORGANIC COMPOUNDS FROM FORTIFIED DRY SOILS |
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Recovery of 8 volatile organic compounds (VOCs) from dry soils, each fortified at 800 ng/g soil, was studied in relation to the extraction method and time of extraction. Extraction...
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EXTRAPULMONARY TRANSLOCATION OF ULTRAFINE CARBON PARTICLES FOLLOWING INHALATION EXPOSURE. (R827354C004) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EXTRAPULMONARY TRANSLOCATION OF ULTRAFINE CARBON PARTICLES FOLLOWING WHOLE-BODY INHALATION EXPOSURE OF RATS. (R826784) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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Ecosystem and decomposer effects on litter dynamics along an old field to old-growth forest successional gradient |
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Identifying the biotic (e.g. decomposers, vegetation) and abiotic (e.g. temperature, moisture) mechanisms controlling litter decomposition is key to understanding ecosystem functio...
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Effective Best Management Practices for Nitrogen Removal in Aquatic Ecosystems |
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Elevated nitrate levels in streams and groundwater are detrimental to human and ecosystem health. The Ground Water and Ecosystems Restoration Division (GWERD) of the USEPA investi...
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Efficient Syntheses of Organics and Nanomaterials Using Microwaves |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Emerging Contaminants in US Drinking Water: Do you know where your water's been? |
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The drinking water and wastewater cycles are integrally linked. Chemicals that are present in household wastewater may be sufficiently mobile and persistent to survive on-site or ...
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Encouraging the use of wetlands in water quality trading programs |
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The interest in water quality trading (WQT) has grown in recent years because of its potential to meet nutrient reduction goals at lower costs. However, one problem identified by ...
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Extent of Sorption and Biodegradability of Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) in Aquifer Sediment |
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Fluoropolymers such as Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic acid (PFOS) were used provide non-stick surfaces on cookware and waterproof, breathable clothing. ...
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FACILITATED CHEMICAL SYNTHESIS UNDER ALTERNATE REACTION CONDITIONS |
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The chemical research in the late 1990's witnessed a paradigm shift towards "environmentally-friendly chemistry" more popularly known as "green chemistry" due to the increasing env...
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FACTORS AFFECTING COMPOSTING OF MUNICIPAL SLUDGE IN A BIOREACTOR |
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The research was initiated to determine the feasibility of composting municipal sludge in an aerated tank bioreactor system and to develop baseline data for the rational operation ...
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FACTORS AFFECTING ENHANCED MERCURY BIOACCUMULATION IN INLAND LAKES OF ISLE ROYALE NATIONAL PARK, USA |
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Recent results have shown that 6 of the 43 inland lakes of Isle Royale National Park, the largest island in Lake Superior, contain northen pike with mercury concentrations exceedin...
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FACTORS AFFECTING TRACE METAL MOBILITY IN SUBSURFACE SOILS |
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Field and laboratory studies were conducted to examine factors affecting metal movement in subsurface materials to groundwater and how these factors interact. Subsoil pH as with su...
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FACTORS INFLUENCING CARBON, NITROGEN, AND PHOSPHORUS CONTENT OF FISH FROM A LAKE SUPERIOR COASTAL WETLAND: LIFE HISTORY VERSUS MORPHOMETRICS |
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The narrow fish nutrient ranges (C, 42.8-48.4%; N, 9.6-12.7%; P, 1.91-2.74%) in this study suggest that overall mean values are adequate for quantifying movement of C, N, or P as p...
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FACTORS INFLUENCING CARBON, NITROGEN, AND PHOSPHORUS CONTENT OF FISH FROM A LAKE SUPERIOR COASTAL WETLAND: LIFE HISTORY VERSUS MORPHOMETRICS. |
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The narrow fish nutrient ranges (C, 42.8-48.4%; N. 9.6-12.7%; P, 1.91-2.74%) in this study suggest that overall mean values are adequate for quantifying movement of C, N, or P as p...
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FACTORS INFLUENCING PHOTOREACTIONS OF DISSOLVED ORGANIC MATTER IN A COASTAL RIVER OF THE SOUTHEASTERN UNITED STATES |
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Photoreactions of dissolved organic matter can affect the oxidizing capacity, nutrient dynamics, trace gas exchange, and color of surface waters. This study focuses on factors that...
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FACTORS INFLUENCING THE COMPOSITION AND QUANTITY OF PASSENGER CAR REFUELING EMISSIONS. PART 2 |
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The study measured and characterized refueling emissions from a 1986 Pontiac Grand Am using 3 test fuels, including a winter, summer and intermediate blend gasoline under a variety...
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FACTORS THAT INFLUENCE THE RELATIVE POTENCY OF DIESEL EXHAUST PARTICLES AS ADJUVANTS IN ALLERGIC AIRWAY DISEASE |
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Description: Studies have shown that diesel exhaust particles (DEP) worsen respiratory diseases including allergic asthma. The adjuvant effects of DEP in the airways have been wi...
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FATE AND PERSISTENCE IN SOIL OF SELECTED TOXIC ORGANIC CHEMICALS |
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The persistence of toxic and generally refractory halogenated hydrocarbons in the environment is a key factor in evaluating human exposure. The report summarizes the chemical and p...
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FATE OF CARBON IN DOUGLAS-FIR SEEDLING/SOIL SYSTEM EXPOSED TO ELEVATED ATMOSPHERIC CO2 AND TEMPERATURE |
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abstract for oral presentation...
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FATE OF CHROMIUM (III) IN CHLORINATED WATER |
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The oxidation of trivalent chromium, Cr(III), to the more toxic Cr(VI) in chlorinated water is thermodynamically feasible and was the subject of the study. The study found that fre...
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FATE OF DISINFECTION BY-PRODUCT PRECURSORS DURING RIVERBANK FILTRATION AT THREE MIDWEST UTILITIES |
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A 3-year project is underway to evaluate riverbank filtration systems along three major US rivers. A principal aspects of the study involved monitoring a suite or organic, inorgani...
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FATE OF METHYLCYCLOPENTADIENYL MANGANESE TRICARBONYL |
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Methylcyclopentadienyl manganese tricarbonyl (MMT) has been proposed as an octane booster for unleaded gasoline; such use could result in ecological and human exposure through surf...
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FATTY ACID STABLE ISOTOPE INDICATORS OF MICROBIAL CARBON SOURCE IN TROPICAL SOILS |
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The soil microbial community plays an important role in tropical ecosystem functioning because of its importance in the soil organic matter (SOM) cycle. We have measured the stabl...
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FEASIBILITY OF PRODUCING ELEMENTAL SULFUR FROM MAGNESIUM SULFITE |
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The report gives results of a study to extend potential applications of MgO flue gas desulfurization processes by allowing the sulfur to be recovered as elemental sulfur as well as...
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FEASIBILITY STUDY OF ALTERNATIVE TECHNOLOGY FOR SMALL COMMUNITY WATER SUPPLY |
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A cooperative demonstration project was funded by the U.S. Environmental Protection Agency (EPA) to enable the Village of Cayuga, N.Y. to install and demonstrate water filtration t...
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FEASIBILITY STUDY OF COPROCESSING OF FOSSIL FUELS WITH BIOMASS BY THE HYDROCARB PROCESS |
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The report describes and gives results of an assessment of a new process concept for the production of carbon and methanol from fossil fuels. he Hydrocarb Process consists of the h...
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FEASIBILITY STUDY OF GRANULAR ACTIVATED CARBON ADSORPTION AND ON-SITE REGENERATION. VOLUME 1: DETAILED REPORT |
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Most research pertaining to water quality and treatment methods conducted in the United States in the last decade utilized pilot-scale components. This project employed full-sized ...
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FEASIBILITY STUDY OF GRANULAR ACTIVATED CARBON ADSORPTION AND ON-SITE REGENERATION. VOLUME 2: SUPPLEMENTAL FIGURES AND DATA |
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Most research pertaining to water quality and treatment methods conducted in the United States in the last decade utilized pilot-scale components. This project employed full-sized ...
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FENTON-DRIVEN CHEMICAL REGENERATION OF MTBE-SPENT GAC |
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Methyl tert-butyl ether (MTBE)-spent granular activated carbon (GAC) was chemically regenerated utilizing the Fenton mechanism. Two successive GAC regeneration cycles were perform...
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FENTON-DRIVEN REGENERATION OF GRANULAR ACTIVATED CARBON: A TECHNOLOGY OVERVIEW |
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A Fenton-driven mechanism for regenerating spent granular activated carbon (GAC) involves the combined, synergistic use of two reliable and well established treatment technologies ...
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FIELD AND LABORATORY STUDIES FOR THE DEVELOPMENT OF EFFLUENT STANDARDS FOR THE STEAM ELECTRIC POWER INDUSTRY |
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The report gives results of an evaluation of carbon absorption, chemical precipitation, reverse osmosis, and vapor compression distillation (VCD) as removal technologies for priori...
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FIELD ASSESSMENT OF AERATED LAGOON EMISSIONS AND THEIR CONTROL USING AN INFLATED DOME |
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The fates of volatile organic compounds (VOC) in an industrial wastewater activated sludge system were investigated in a 4-day sampling and analysis program. The system included an...
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FIELD ASSESSMENT OF AIR EMISSIONS AND THEIR CONTROL AT A REFINERY LAND TREATMENT FACILITY. VOLUME 1 |
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A field assessment was performed to measure the emissions of volatile organics from a petroleum refinery land treatment site. As part of the study, the emissions of total volatile ...
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FIELD ASSESSMENT OF AIR EMISSIONS AND THEIR CONTROL AT A REFINERY LAND TREATMENT FACILITY. VOLUME 2 |
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A field assessment was performed to measure the emissions of volatile organics from a petroleum refinery land treatment site. As part of the study, the emissions of total volatile ...
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FIELD DEMONSTRATION OF LEAD PAINT ABATEMENT TECHNOLOGIES IN RESIDENTIAL HOUSING |
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This study was conducted to demonstrate lead-based paint (LBP) removal from architectural wood components in CO2 unoccupied residential housing using four technologies: granular ca...
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FIELD DEMONSTRATION OF THE LINDE OXYGEN COMBUSTION SYSTEM ON THE EPA MOBILE INCINERATOR |
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This paper summarizes the various system performance tests and the long-term operating experience of the LINDE(r) Oxygen Combustion System (OCS) installed on the U.S. Environmental...
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FIELD EVALUATION OF A HIGH-VOLUME DICHOTOMOUS SAMPLER |
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This study presents the field evaluation of a high-volume dichotomous sampler that collects coarse (PM10-2.5) and fine (PM2.5) particulate matter. The key feature of this device is...
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FIELD EVALUATION OF A SIMPLE MICROCOSM SIMULATING THE BEHAVIOR OF VOLATILE ORGANIC COMPOUNDS IN SUBSURFACE MATERIALS |
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A simple batch microcosm had previously been developed to simulate the behavior of volatile organic compounds in unconsolidated subsurface material. The microcosm was evaluated by ...
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FIELD EVALUATION OF LOW-EMISSIONS COAL BURNER TECHNOLOGY ON UTILITY BOILERS; VOLUME II. SECOND GENERATION LOW-NOX BOILERS |
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The report describes tests to evaluate the performance characteristics of three Second Generation Low-NOx burner designs: the Dual Register burner (DRB), the Babcock-Hitachi NOx Re...
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FIELD EVALUATION OF RESOURCE RECOVERY OF HAZARDOUS WASTES |
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Incineration of mixed waste solvents in two process kilns was investigated during two 1-week field testing programs. The overall objective of the study was to evaluate the effectiv...
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FIELD EVALUATION OF VOLATILE ORGANIC COMPOUND REMOVAL EFFICIENCY FOR FULL-SCALE CARBON ADSORPTION SYSTEMS |
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Six full-scale, fixed-bed carbon adsorption systems were tested for vapor-phase volatile organic compound removal efficiency. Solvents used in the systems included methyl ethyl ket...
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FIELD EXPERIENCE WITH AMBIENT-LEVEL FLAME-PHOTOMETRIC SULPHUR DETECTORS |
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Carbon dioxide exhaled by the operators produces increased levels of this gas inside the trailers used for housing monitoring equipment for use in the field. These levels can be hi...
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FIELD EXPERIENCES VOC AND PESTICIDES REMOVAL USING GAC SUFFOLK COUNTY, NEW YORK |
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Over the past eight years, GAC systems have been installed for treatment of VOC and pesticides. everal have seen multiple carbon replacement; changes in water quality; and experien...
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FIELD EXPOSURE STUDY FOR DETERMINING THE EFFECTS OF ACID DEPOSITION ON THE CORROSION AND DETERIORATION OF MATERIALS: DESCRIPTION OF PROGRAM AND PRELIMINARY RESULTS |
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Materials exposure sites, fully instrumented to characterize environmental parameters related to air quality, meteorology, and rain chemistry, have been established at four locatio...
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FIELD MEASUREMENT OF DENITRIFICATION |
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Denitrification from a Yolo loam field profile was studied in relation to the influence of soil-water content, organic carbon source, and temperature. Field plots were intensely in...
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FIELD MEASUREMENT OF GREENHOUSE GAS EMISSION RATES AND DEVELOPMENT OF EMISSION FACTORS FOR WASTEWATER TREATMENT |
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The report gives results of field testing to develop more reliable green house gas (GHG) emission estimates for Wastewater treatment (WWT) lagoons. (NOTE: Estimates are available f...
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FIELD MEASUREMENTS OF FULL-SCALE HAZARDOUS WASTE TREATMENT FACILITIES - ORGANIC SOLVENT WASTES |
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The report describes the treatment of organic hazardous wastes by distillation, thin-film evaporation, incineration, steam stripping, waste blending, carbon adsorption and activate...
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FIELD OBSERVATIONS TO RECOGNIZE THE NATURAL BIODEGRADATION OF MTBE |
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At some gasoline spill sites (perhaps a third of sites nationwide) MTBE in ground water has been biologically degraded to TBA. This natural biodegradation of MTBE contributes to t...
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FIELD PERFORMANCE OF WOODBURNING AND COALBURNING APPLIANCES IN CRESTED BUTTE DURING THE 1989-1990 HEATING SEASON |
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The report gives results of an evacuation of the field performance of woodburning and coalburning appliances in and around Crested Butte, CO. easurements included particulate matte...
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FIELD PERFORMANCE OF WOODBURNING STOVES IN COLORADO DURING THE 1995-96 HEATING SEASON |
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The report gives results of evaluations of the field performance of 13 EPA-certified woodburning stoves in Crested Butte and Curecanti National Park, CO, during the winter of 1995-...
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FIELD PERFORMANCE OF WOODBURNING STOVES IN CRESTED BUTTE DURING THE 1991-92 HEATING SEASON |
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The report gives results of an evaluation of the 1991-92 field performance of 11 woodburning stoves in and around Crested Butte, CO. Measurements included particulate matter (PM), ...
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FIELD PERFORMANCE OF WOODBURNING STOVES IN CRESTED BUTTE, COLORADO |
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The paper discusses field emissions from woodstoves measured in Crested Butte, Colorado, during the winters of 1988-89 and 1989-90. oth particulate matter and carbon monoxide emiss...
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FIELD RELIABILITY OF THE ORSAT ANALYZER |
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Results from four field based collaborative tests and from one laboratory based collaborative test of the Orsat analytical procedure are discussed. The results from the five collab...
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FIELD STUDIES TO EVALUATE STAND-SCALE EFFECTS OF FOREST MANAGEMENT ON ECOSYSTEM CARBON STORAGE |
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This research plan provides new knowledge on the range of possibilities--available by managing forest differently--to store more carbon (C) to meet the climate-change action plant ...
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FIELD STUDY RESULTS FOR VOCS WITH THE PERKIN-ELMER SEQUENTIAL TUBE SAMPLER |
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Two Perkin-Elmer Sequential Tube Samplers (Model STS-25) were evaluated for their performance, portability, and convenience of operation. esults obtained from both samplers and fro...
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FIELD SURVEYS OF CARBON MONOXIDE IN COMMERCIAL SETTINGS USING PERSONAL EXPOSURE MONITORS |
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This study employed miniaturized personal exposure monitors (PEMs) to measure carbon monoxide (CO) in 588 different commercial settings (e.g., retail stores, office buildings, hote...
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FIELD TEST OF AIR SPARGING COUPLED WITH SOIL VAPOR EXTRACTION |
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A controlled field study was designed and conducted to assess the performance of air sparging for remediation of petroleum fuel and solvent contamination in a shallow (3-m deep) gr...
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FIELD VALIDATION OF A SEMI-CONTINUOUS METHOD FOR AEROSOL BLACK CARBON (AETHALOMETER) AND TEMPORAL PATTERNS OF SUMMERTIME HOURLY BLACK CARBON MEASUREMENTS IN SOUTHWESTERN PA |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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FIELD VALIDATION OF THE VOLATILE ORGANIC SAMPLING TRAIN (VOST) PROTOCOL |
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With the development of the Volatile Organic Sampling Train (VOST) Protocol (February 1984) to measure organic emissions from hazardous waste incinerators, a wide variety of compou...
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FIELD-PRODUCED JP-8 STANDARD FOR CALIBRATION OF LOWER EXPLOSIVE LIMIT METERS USED BY JET FUEL TANK MAINTENANCE PERSONNEL |
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Thousands of military personnel and tens of thousands of civilian workers perform jet fuel tank entry procedures. Before entering the confined space of a jet fuel tank, OSHA reg...
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FINAL REPT. SEP 79-AUG 81 |
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The report gives results of a program to develop a sound fundamental technical base for supercritical-fluid regeneration of activated carbon applied to adsorption of volatile organ...
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FINAL SAMPLING REPORT FOR THE STUDY OF PERSONAL CO (CARBON MONOXIDE) EXPOSURE |
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This report describes the sample selection procedures used for a study funded by the EPA and conducted by the Research Triangle Institute in 1982 and 1983 to evaluate methodology f...
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FINE PARTICLE EMISSIONS FROM RESIDUAL FUEL OIL COMBUSTION: CHARACTERIZATION AND MECHANISMS OF FORMATION |
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The paper gives results of a comparison of the characteristics of particulate matter (PM) emitted from residual fuel oil combustion in two types of combustion equipment. A small c...
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FINE PARTICLE EMISSIONS FROM RESIDUAL FUEL OIL COMBUSTION: CHARACTERIZATION AND MECHANISMS OF FORMATION |
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The paper gives results of a comparison of the characteristics of particulate matter (PM) emitted from residual fuel oil combustion in two types of combustion equipment. A small co...
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FINE PARTICULATE MATTER SOURCE ATTRIBUTION FOR SOUTHEAST TEXAS USING 14C/13C RATIOS |
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Radiocarbon analyses of fine particulate matter samples collected during the summer of 2000 in southeast Texas indicate that a substantial fraction of the aerosol carbon at an ur...
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FINE ROOT RESPONSES TO ELEVATED CO2 IN A MOJAVE DESERT ECOSYSTEM |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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FINE-PARTICLE SODIUM TRACER FOR LONG-RANGE TRANSPORT OF THE KUWAITI OIL FIRE PLUME |
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Evidence for long-range transport of the Kuwaiti oil-fire smoke during the months following the Persian Gulf War has been more or less indirect. or example, high concentrations of ...
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FIRE STUDIES IN MALLEE (EUCALYPTUS SPP.) COMMUNITIES OF WESTERN NEW SOUTH WALES: SPATIAL AND TEMPORAL FLUXES IN SOIL CHEMISTRY AND SOIL BIOLOGY FOLLOWING PRESCRIBED FIRE. |
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The effects of prescribed fires on nutrient pools, soil-organisms, and vegetation patch dynamics were studied in three semi-arid mallee shrublands in western New South Wales. Repea...
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FISH PHYSIOLOGY, FISH TOXICOLOGY, AND FESHERIES MANAGEMENT. PROCEEDINGS OF AN INTERNATIONAL SYMPOSIUM, GUANGZHOU, PRC SPETEMBER 14-16, 1988 |
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Scientists from eight countries presented papers at the first International Symposium on Fish Physiology, Fish Toxicology and which was held on the campus of Zhongshan Univesity, G...
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FISH-MEDIATED NUTRIENT AND ENERGY EXCHANGE BETWEEN A LAKE SUPERIOR COASTAL WETLAND AND ITS ADJACENT BAY |
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Little has been done to quantify fluxes of organisms, nutrients, and energy between freshwater coastal habitats and adjacent offshore waters or to evaluate the ecological implicat...
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FIXED-BED HYDROGENATION OF ORGANIC COMPOUNDS IN SUPERCRITICAL CARBON DIOXIDE. (R826034) |
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AbstractThe Pd/C hydrogenation of cyclohexene to cyclohexane was performed in a continuous fixed-bed reactor employing CO2 to solubilize the reaction mixture...
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FLEXIBLE REGIONAL EMISSIONS DATA SYSTEM (FREDS) DOCUMENTATION FOR THE 1985 NAPAP EMISSIONS INVENTORY |
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The report documents the Flexible Regional Emissions Data System (FREDS) for the 1985 NAPAP Emissions Inventory. FREDS extracts emissions data, modeling parameters (e. g., stack he...
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FLUE GAS EFFECTS ON A CARBON-BASED MERCURY SORBENT. (R827649) |
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Coal is now the primary source of anthropogenic mercury emissions in the United States, accounting for 46%, or 72 tons/year, of the total U.S. Environmental Protection Agency (E...
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FLUIDIZED-BED GASIFICATION OF PEAT, LIGNITE, SUBBITUMINOUS, AND PRETREATED BITUMINOUS COAL |
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The report summarizes and compares results obtained from gasifying four different feedstocks in a pilot-scale fluidized-bed gasifier. Effects of operating variables (e.g., temperat...
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FLUORINATED ETHERS--A NEW SERIES OF CFC SUBSTITUTES |
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The paper discusses fluorinated ethers, a new series of chlorofluorocarbon (CFC) substitutes. ompounds synthesized to produce substances with suitable refrigerant properties have g...
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FLUXES OF GASES AND PARTICLES ABOVE A DECIDUOUS FOREST IN WINTERTIME |
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Eddy-correlation measurements of the vertical fluxes of ozone, carbon dioxide, fine particles with diameter near 0.1 micrometers, and particulate sulfur, as well as of momentum, he...
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FOAM GLASS INSULATION FROM WASTE GLASS |
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Waste glass has proven to be effective for the production of foam glass insulation both in the bulk or rigid board form and pellet form. Problems inherent with the use of water, ca...
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FOLIAR NITROGEN CONCENTRATIONS AND NATURAL ABUNDANCE OF 15N SUGGEST NITROGEN ALLOCATION PATTERNS OF DOUGLAS-FIR AND MYCORRHIZAL FUNGI DURING DEVELOPMENT IN ELEVATED CARBON DIOXIDE CONCENTRATION AND TEMPERATURE |
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In an experiment using Pseudotsuga menziesii (Mirb.) Franco (Douglas-fir) seedlings and a 2x2 factorial design in enclosed mesocosms, temperatures were maintained at ambient or +3....
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FOLLOW-UP ALPHA-TRACK MONITORING IN 40 EASTERN PENNSYLVANIA HOUSES WITH INDOOR RADON REDUCTION SYSTEMS (WINTER 1987-88) |
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The report gives results of follow-up alpha-track detector (ATD) measurements. The systems involved some form of active soil ventilation, although three involved heat recovery vent...
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FOLLOW-UP ALPHA-TRACK MONITORING IN 40 EASTERN PENNSYLVANIA HOUSES WITH INDOOR RADON REDUCTION SYSTEMS (WINTER 1988-89) |
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The report gives results of 4-month-long alpha-track detector (ATD) measurements of indoor radon concentrations, completed during the winter of 1988-89 in 38 of 40 houses where rad...
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FOLLOW-UP ALPHA-TRACK MONITORING IN 40 EASTERN PENNSYLVANIA HOUSES WITH INDOOR RADON REDUCTION SYSTEMS (WINTER 1988-89) |
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The report gives results of 4-month-long alpha-track detector (ATD) measurements of indoor radon concentrations, completed during the winter of 1988-89 in 38 of 40 houses where rad...
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FOREST ECOSYSTEM CARBON AND NITROGEN ACCUMULATION DURING THE FIRST CENTURY AFTER AGRICULTURAL ABANDONMENT |
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Forests of the northeastern U.S. are expected to serve as a substantial sink for carbon (C) and nitrogen (N) as they recover from extensive clearing and agriculture. However, ques...
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FOREST FIRES IN RUSSIA: CARBON DIOXIDE EMISSIONS IN THE ATMOSPHERE |
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Boreal forests of Russia play a significant role in the global carbon cycle and the f lux of greenhouse gases to the atmosphere. ecause f ire and other disturbances are ecologicall...
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FOREST HARVESTS AND WOOD PRODUCTS: SOURCES AND SINKS OF ATMOSPHERIC CARBON DIOXIDE |
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Changes in the net carbon(c)sink-source balance related to a country's forest harvesting and use of wood products is an important component in making country-level inventories of g...
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FOREST MANAGEMENT AND AGROFORESTRY TO SEQUESTER AND CONSERVE ATMOSPHERIC CARBON DIOXIDE |
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Overall, the biological opportunity to conserve and sequester carbon in the terrestrial biosphere, especially in forest systems, appears significant. ith careful planning and imple...
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FOREST MANAGEMENT AND CARBON STORAGE: AN ANALYSIS OF 12 KEY FOREST NATIONS |
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This paper suggests a starting approach to a global effort to expand forest management to increase C sequestration. ssessment results indicate that with the world's forests contain...
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FOREST MANAGEMENT AND THE ECONOMICS OF CARBON STORAGE: THE NONFINANCIAL COMPONENT |
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Interest has grown internationally in the past decade for stepping up management of world forests. his paper focuses on the economic considerations for forest management for carbon...
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FOREST PLANTATIONS OF THE WORLD: THEIR EXTENT,, ECOLOGICAL ATTRIBUTES, AND CARBON STORAGE |
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NO ABSTRACT PROVIDED...
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FOREST SECTOR CARBON BUDGET OF THE UNITED STATES: CARBON POOLS AND FLUX UNDER ALTERNATIVE POLICY OPTIONS |
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This document presents a model of the current and future carbon budget associated with the forest ecosystems of the conterminous U.S. he focus is on effects of economic and environ...
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FOREST SOIL CARBON SEQUESTRATION: ACCOUNTING FOR THIS VITAL ECOSYSTEM SERVICE |
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Forests play a crucial role in supplying many goods and services that society depends upon on a daily basis including water supply, production of oxygen, soil protection, building ...
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FOREST SOIL RESPONSE TO ACID AND SALT ADDITIONS OF SULFATE III. SOLUBILIZATION AND COMPOSITION OF DISSOLVED ORGANIC CARBON |
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A year-long experiment, using reconstructed spodosol and intact alfisol soil columns, was conducted to examine the effects of various simulated throughfall solutions on soil C dyna...
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FORMATION MECHANISMS FOR SECONDARY ORGANIC AEROSOL IN AMBIENT AIR |
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An laboratory and field research program is underway at the NERL to characterize secondary organic carbon in PM2.5 which is formed through chemical reactions in the atmo...
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FORMATION OF 8-OXO-2'-DEOXYGUANOSINE, AN OXIDATIVE ADDUCT IN THE LUNG DNA OF RATS FOLLOWING SUBCHRONIC INHALATION OF CARBON BLACK |
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Chronic inhalation of carbon black (CB) can produce carcinomas in rat lungs. The mechanisms underlying this response are uncertain. However, it has been postulated that chronic ...
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FORMATION OF 8-OXO-7, 8-DIHYDRO-2'-DEOXYGUANOSINE IN RAT LUNG FOLLOWING SUB-CHRONIC INHALATION OF CARBON BLACK |
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ABSTRACT
Formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine, an oxidative adduct in the lung DNA of rats following sub-chronic inhalation of carbon black. Gallagher, J., Sams II...
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FORMATION OF ACIDIC TRACE ORGANIC BY-PRODUCTS FROM THE CHLORINATION OF HUMIC ACIDS |
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A method for concentrating and analyzing acidic trace organics produced by the chlorination of humic acids at concentrations approximating common drinking water levels is described...
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FORMATION OF ANATASE TIO2 NANOPARTICLES ON CARBON NANOTUBES. (R829602) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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FORMATION OF AQUEOUS SMALL DROPLET AEROSOLS ASSISTED BY SUPERCRITICAL CARBON DIOXIDE. (R824728) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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FORMATION OF CARBON MONOXIDE FROM THE PHOTODEGRADATION OF TERRESTRIAL DISSOLVED ORGANIC CARBON IN NATURAL WATERS |
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The photochemical formation of carbon monoxide (CO) in water samples obtained from wetlands, lakes, and near-coastal/shelf areas and in aqueous solutions of soil organic matter was...
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FORMATION OF DNA ADDUCTS IN RAT LUNG FOLLOWING CHRONIC INHALATION OF DIESEL EMISSIONS, CARBON BLACK, AND TITANIUM DIOXIDE PARTICLES |
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The objective of this study was to determine whether the polycyclic aromatic hydrocarbons(PAH), nitro-PAH or other polycyclic organic matter adsorbed to diesel particles induces th...
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FORMATION OF TRANSIENT PUFFS FROM CONTAINED LIQUID WASTES IN A ROTARY KILN SIMULATOR |
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The paper gives results of a study of the generation of transient puffs resulting from the batch incineration of liquid waste into a 73 kW rotary kiln incinerator simulator. Liquid...
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FORT HALL SOURCE APPORTIONMENT STUDY (FINAL REPORT) |
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Air quality monitoring on the Fort Hall Indian Reservation has revealed numerous exceedances of the National Ambient Air Quality Standard (NAAQS) for 24-h averaged PM10 mass. Win...
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FOSSIL FUEL BIODEGRADATION: LABORATORY STUDIES |
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Natural processes of biodegradation, that return carbon from its various organic forms to the inorganic state, are increasingly screened for bioremediation applications. ariety of ...
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FRACTIONATION OF STABLE CARBON ISOTOPES DURING ABIOTIC TRANSFORMATION OF TCE |
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At a Superfund Site in Minnesota, ground water is contaminated with trichloroethylene (TCE) with the contaminant plume stretching over five miles long. The ground water is iron an...
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FRAMEWORK FOR ANALYSIS OF ERROR PROPAGATION IN NATIONAL CARBON BUDGETS |
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NO ABSTRACT PROVIDED...
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FREE AND COMBINED AMINO COMPOUNDS IN ATMOSPHERIC FINE PARTICLES (PM2.5) AND FOG WATERS FROM NORTHERN CALIFORNIA. (R825433) |
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Atmospheric fine particles (PM2.5) collected during August 1997–July 1998 and wintertime fog waters collected during 1997–1999 at Davis, California were...
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FROM THE FOREST TO THE SEA AND BACK AGAIN: MARINE INPUTS AND TERRESTRIAL BIOGEOCHEMISTRY IN THE PACIFIC NORTHWEST |
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Most models of watershed biogeochemistry include the movement of materials from land to rivers and eventually the ocean. Few conceptual views, however, acknowledge the influence o...
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FROM THE SEA TO THE FOREST: SEA SALT DEPOSITION ALTERS SOIL PROCESSES IN COASTAL FORESTS |
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Most models of watershed biogeochemistry include the movement of materials from land to rivers and eventually the ocean. Few conceptual views, however, acknowledge the influence o...
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FULL SCALE RADIUM REMOVAL SYSTEM FOR A SMALL COMMUNITY |
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A radium removal treatment plant was constructed for the small community of Redhill Forest in the central mountains of Colorado. The plant consists of iron removal using oxidation,...
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FULL-SCALE CARBON ADSORPTION APPLICATIONS STUDY |
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Six full-scale, fixed-bed carbon adsorption systems were tested for vapor-phase volatile organic compound removal efficiency. Solvents used in the systems included methyl ethyl ket...
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FULL-SCALE DEMONSTRATION OF INDUSTRIAL WASTEWATER TREATMENT UTILIZING DU PONT'S PACT (TRADE NAME) PROCESS |
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Operating and cost data on startup and the initial 30 months of operation of a 150,000 cu m/day (40-MGD) industrial wastewater treatment plant using Du Pont's PACT process are repo...
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FUNDAMENTAL SCIENCE AND ENGINEERING OF MERCURY CONTROL IN COAL-FIRED POWER PLANTS |
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The paper discusses the existing knowledge base applicable to mercury (Hg) control in coal-fired boilers and outlines the gaps in knowledge that can be filled by experimentation an...
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FURTHER REFINEMENTS AND TESTING OF APEX3.0: EPA'S POPULATION EXPOSURE MODEL FOR CRITERIA AND AIR TOXIC INHALATION |
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The Air Pollutants Exposure Model (APEX(3.0)) is a PC-based model that was derived from the probabilistic NAAQS Exposure Model for carbon monoxide (pNEM/CO). APEX will be one of...
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FURTHER STUDY OF ADIPIC ACID DEGRADATION IN FGD SCRUBBERS |
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The report gives results of investigations of adipic acid degradation to account for losses observed during earlier studies where it was used as an additive to improve SO2 scrubber...
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FUTURE OF ENERGY |
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A complete Scientific American issue of nine specialist articles was devoted to the concern of powering the global economy and addressing the effects of global warming. Control of ...
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Formation of Secondary Organic Aerosol from Irradiated a-Pinene/Tolueme/NOx Mixtures and the Effect of Isoprene and Sulfur Dioxide |
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Secondary organic aerosol (SOA) was generated by irradiating a series of a-pinene/toluene/NOx mixtures in the absence and presence of isoprene or sulfur dioxide. The purpose of th...
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GAC (GRANULAR ACTIVATED CARBON) TREATMENT COSTS: A SENSITIVITY ANALYSIS |
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Although admittedly effective for removing organic compounds, concerns have been raised about the cost of using GAC for treating drinking water. This paper is devoted to the discus...
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GAC ADSORPTION OF A MIXTURE OF NATURAL ORGANIC MATTER AND VOCS IN THE PRESENCE AND ABSENCE OF MOLECULAR OXYGEN |
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In an attempt to determine the effects of molecular oxygen on activated carbon adsorption modeling; isotherms, microcolumns, and pilot-columns are completed in the presence and abs...
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GAS CHROMATOGRAPHIC METHOD FOR QUANTITATIVE DETERMINATION OF C2 TO C13 HYDROCARBONS IN ROADWAY VEHICLE EMISSIONS |
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A gas chromatographic system was used to quantitate more than 300 gas-phase hydrocarbons from background and roadside ambient air samples. Samples were simultaneously collected in ...
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GAS CHROMATOGRAPHIC TECHNIQUES FOR THE MEASUREMENT OF ISOPRENE IN AIR |
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The chapter discusses gas chromatographic techniques for measuring isoprene in air. Such measurement basically consists of three parts: (1) collection of sufficient sample volume f...
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GAS PERMEATION PROPERTIES OF POLY(LACTIC ACID). (R826733) |
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AbstractThe need for the development of polymeric materials based on renewable resources has led to the development of poly(lactic acid) (PLA) which is being produced f...
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GAS- AND SOLID-PHASE PARTITIONING OF PCDDS/FS ON MSWI FLY ASH AND THE EFFECTS OF SAMPLING |
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Semi-volatile organic compounds (SOCs), including polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDDs/Fs), are partitioned as gas-phase and particle-bound products of many indus...
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GASEOUS AND PARTICULATE EMISSIONS FROM GASOLINE- AND DIESEL-POWERED HEAVY-DUTY TRUCKS |
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Gaseous and particulate emission rates from seven class 2B, one class 5 and six class 6 heavy-duty gasoline- and diesel-powered trucks were determined using transient chassis dynam...
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GASEOUS EMISSIONS FROM EXCESS AIR COMBUSTION OF EXPLOSIVES AND PROPELLANTS |
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The purpose of this short-term project was to determine the levels of nitric oxide (NO), nitrogen dioxide (NO2), and carbon monoxide (CO) in the off-gases from the open burning of ...
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GENERAL DESIGN STUDY OF PILOT VOC CONTROL UNITS |
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The Industrial Environmental Research Laboratory (IERL), in support of the Office of Air Quality Planning and Standards Volatile Organic Compounds (VOC) Program, has established a ...
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GENERATION AND CONTROL OF AIR POLLUTANTS FROM ORIMULSION (R) COMBUSTION |
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The paper discusses a study requested in 1997 by the U.S. Congress to provide technical information regarding Orimulsion (R) and its environmental impacts. (NOTE: Orimulsion is an...
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GENERATION AND VALIDATION OF OXYGENATED VOLATILE ORGANIC CARBON STANDARDS FOR THE 1995 SOUTHERN OXIDANTS STUDY NASHVILLE INTENSIVE. (R825261) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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GENERATION OF SOIL SOLUTION ACID NEUTRALIZING CAPACITY BY ADDITION OF DISSOLVED INORGANIC CARBON |
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A Spodosol B horizon(base saturation of 5.4%) collected at the Watershed Manipulation Project site at Lead Mountain, ME, was used to examine soil solution chemistry in response to ...
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GENETIC STRUCTURE OF FUNDULUS HETEROCLITUS FROM PAH-CONTAMINATED AND NEIGHBORING SITES IN THE ELIZABETH AND YORK RIVERS. (R826593) |
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AbstractPopulation genetic characteristics of mummichog, Fundulus heteroclitus, from the heavily industrialized Elizabeth River and nearby York River (Virginia U...
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GENOTOXIC ACTIVITY OF ORGANIC CHEMICALS IN DRINKING WATER |
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The information summarized in this review provides substantial evidence for the widespread presence of genotoxins in drinking water. In many, if not most cases, the genotoxic activ...
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GENOTOXICITY OF 2,4,5-TRICHLOROPHENOXYACETIC ACID BIODEGRADATION PRODUCTS IN THE SALMONELLA REVERSION AND LAMBDA PROPHAGE-INDUCTION BIOASSAYS |
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The herbicide, 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), is still an environmental hazard because of its persistent nature even though its use was outlawed in this country in th...
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GEOCHEMICAL FACTORS GOVERNING METHYL MERCURY PRODUCTION IN MERCURY CONTAMINATED SEDIMENTS |
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Bench scale experiments were conducted to improve our understanding of aquatic mercury transformation processes (biotic and abiotic), specifically those factors which govern the pr...
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GEOCHEMISTRY OF PAHS IN AQUATIC ENVIRONMENTS: A SYNTHESIS OF DISTRIBUTION, SOURCE, PERSISTENCE, PARTITIONING AND BIOAVAILABILITY |
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On the basis of their distributions, sources, persistence, partitioning and bioavailability, polycyclic aromatic hydrocarbons (PAHs) are a unique class of persistent organic pollut...
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GEOELECTRICAL EVIDENCE OF MICROBIAL DEGRADATION OF DIESEL CONTAMINATED SEDIMENTS |
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The alteration of physical properties by microbial activity in petroleum contaminated sediments was investigated using geophysical techniques in laboratory column experiments. Micr...
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GEOLOGIC CARBON STORAGE: UNDERSTANDING THE RULES OF THE UNDERGROUND |
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The paper discusses the geologic sequestration (GS) of carbon dioxide (CO2), an emerging option for carbon management. Few studies have explored the regulatory needs of GS or compa...
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GEOMORPHIC CONTROLS ON C AND N PROCESSING IN A RESTORED URBAN STREAM |
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Organic carbon is needed for restored streams to be effective at removing nitrogen. Organic carbon needs to reach anaerobic layers, therefore hydrologic connectivity should be inc...
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GEOMORPHIC CONTROLS ON C AND N PROCESSING IN A RESTORED URBAN STREAM; POWER POINT PRESENTATION |
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Stream channel incision due to hydraulic alteration stemming from urbanization may cause a disconnection between the stream channel and the adjacent floodplain. This disconnection...
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GEOMORPHIC CONTROLS ON CARBON AND NITROGEN PROCESSING IN A DEGRADED URBAN STREAM |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. Microbial denitrification removes nitrate from groundwater but requires anaerobic (saturated)...
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GIS APPLICATION OF LANDSCAPE METRICS TO IDENTIFY WETLAND RESTORATION TARGETS IN ARKANSAS WHITE RIVER BASIN |
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Techniques for the broad-scale identification of wetland restoration sites are increasingly being sought for the purposes of improving the functions of wetlands that infIuence wate...
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GLOBAL ASSESSMENT OF PROMISING FOREST MANAGEMENT PRACTICES FOR SEQUESTRATION OF CARBON |
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The assessment produced productivity and cost data for forest and agroforestry management practices in 94 nations. hat is, out of a total of 140 nations in the world with forest re...
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GLOBAL ATMOSPHERIC BACKGROUND MONITORING FOR SELECTED ENVIRONMENTAL PARAMETERS BAPMON DATA FOR 1981: VOLUME 2. PRECIPITATION CHEMISTRY, CONTINUOUS ATMOSPHERIC CARBON DIOXIDE AND SUSPENDED PARTICULATE MATTER |
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The report is the seventh in series reporting precipitation data from stations participating in the World Meterological Organization's network. The report consists of tables of raw...
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GLOBAL CARBON CYCLE AND CLIMATE CHANGE |
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The production of greenhouse gases due to anthropogenic activities may have begun to change the global climate. he global carbon cycle plays a significant role in projected climate...
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GLOBAL CARBON CYCLE AND CLIMATE CHANGE: RESPONSES AND FEEDBACKS FROM BELOW-GROUND SYSTEMS |
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According to most global climate models, a continued build-up of OC2 and other greenhouse gases will lead to significant changes in temperature and precipitation patterns over larg...
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GLOBAL CHANGE: SHOULD WE WORRY? |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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GLOBAL CLIMATE CHANGE AND AGRICULTURE: AN ECONOMIC PERSPECTIVE |
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Climate change and related global concerns dominate the current environmental agenda as evidenced by the recent wave of articles, symposia workshops, and other scientific and lay f...
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GLOBAL CLIMATE CHANGE--THE TECHNOLOGY CHALLENGE |
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Anthropogenic emissions of greenhouse gases, such as carbon dioxide, have led to increasing atmospheric concentrations which are at least partly responsible for the roughly 0.7% de...
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GLOBAL TERRESTRIAL CARBON CYCLE |
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There is great uncertainty with regard to the future role of the terrestrial biosphere in the global carbon cycle, arising from both an inadequate understanding of current pools an...
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GLOBAL TRANSCRIPTION PROFILING REVEALS DIFFERENTIAL RESPONSES TO CHRONIC NITROGEN STRESS AND PUTATIVE NITROGEN REGULATORY COMPONENTS IN ARABIDOPSIS |
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Background: A large quantity of nitrogen (N) fertilizer is used for crop production to achieve high yields at a significant economic and environmental cost. Efforts have been direc...
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GLOBAL WARMING MITIGATION POTENTIAL OF THREE TREE PLANTATION SCENARIOS |
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The report gives results of an analysis of three alternative uses of forests in the U.S. to reduce atmospheric carbon dioxide (CO2)concentrations: (1) planting trees with no harves...
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GRANULAR ACTIVATED CARBON ADSORPTION AND FLUID-BED REACTIVATION AT MANCHESTER, NEW HAMPSHIRE |
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Treatment performances of virgin and reactivated GAC were evaluated during three reactivation-exhaustion cycles by measuring total organic carbon (TOC), trihalomethanes (THM), and ...
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GRANULAR ACTIVATED CARBON ADSORPTION AND INFRARED REACTIVATION: A CASE STUDY |
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To study the effectiveness of GAC and on-site reactivation, a research cooperative agreement was developed between EPA and Jefferson Parish, Louisiana. nder this agreement, (3) one...
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GRANULAR ACTIVATED CARBON ADSORPTION AND INFRARED REACTIVATION: A CASE STUDY |
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A study evaluated the effectiveness and cost of removing trace organic contaminants and surrogates from drinking water by granular activated carbon (GAC) adsorption. The effect of...
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GRANULAR ACTIVATED CARBON ADSORPTION WITH ON-SITE INFRARED FURNACE REACTIVATION |
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The costs associated with the design, construction, operation, and maintenance of three 1 million gallons per day (mgd) granular activated carbon (GAC) pressure contractors and rea...
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GRANULAR ACTIVATED CARBON FOR CONTROLLING THMS (TRIHALOMETHANES) (JOURNAL VERSION) |
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Suggested reduction of the maximum contaminant level for trihalomethanes (THMs) could force many utilities to change disinfectants or to alter treatment processes. Faced with the p...
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GRANULAR ACTIVATED CARBON FOR REMOVING NONTRIHALOMETHANE ORGANICS FROM DRINKING WATER |
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Several large field scale research projects were initiated by the U.S. EPA Drinking Water Research Division, MERL, Cincinnati, OH to evaluate the performance of GAC under varying o...
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GRANULAR ACTIVATED CARBON INSTALLATIONS |
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This paper presents a compilation and summary of design criteria, performance, and cost data from 22 operating municipal and industrial granular activated carbon (GAC) installation...
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GRANULAR ACTIVATED CARBON REACTIVATION: PERFORMANCE, COST, AND PROBLEMS |
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There is a high probability that GAC will be used more extensively by drinking water utilities. GAC is a proven media for removing synthetic organics from drinking water. A number ...
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GREEN CHEMICAL SYNTHESIS THROUGH CATALYSIS AND ALTERNATE REACTION CONDITIONS |
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Green chemical synthesis through catalysis and alternate reaction conditions
Encompassing green chemistry techniques and methodologies, we have initiated several projects at...
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GREEN CHEMISTRY AND ENGINEERING RESEARCH AT THE USEPA, NRMRL |
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The costs of handling, treating and disposing of wastes generated annually in the U.S. has reach to 2.2% of gross domestic product and continued to rise. The chemical manufacturing...
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GREEN CHEMISTRY FOR SELECTIRVE OXIDATION PROCESSES |
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The costs of handling, treating and disposing of wastes generated annually in the United States has reached to 2.2% of gross domestic product, and continued to rise. The chemical m...
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GREEN CHEMISTRY THROUGH CATALYSIS, ALTERNATIVE SOLVENTS AND NANOTECHNOLOGY |
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Researchers at the National Risk Management Research Laboratory, Sustainable Technology Division have been working on new scientific approaches to persistent technological problems...
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GREENER CHEMICAL SYNTHESES USING ALTERNATIVE REACTION CONDITIONS AND MEDIA (BRAZIL 2006) |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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GREENER ORGANIC SYNTHESES USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The diverse nature of chemical entities requires various green' strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave (M...
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GREENER PRODUCTION OF NOBLE METAL NANOSTRUCTURES AND NANOCOMPOSITES: RISK REDUCTION AND APPLICATIONS |
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The synthesis of nanometal/nano metal oxide/nanostructured polymer and their stabilization (through dispersant, biodegradable polymer) involves the use of natural renewable resourc...
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GREENER SYNTHESIS OF NANOMETALS AND NANOCOMPOSITES AND THEIR APPLICATION IN ORGANIC SYNTHESES |
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A brief account of a greener preparation of nanoparticles which reduces or eliminates the use and generation of hazardous substances is described. The use of vitamins B1 and B2, wh...
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GREENER SYNTHESIS OF NOBLE METAL NANOSTRUCTURES AND NANOCOMPOSITES |
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A brief account of a greener preparation of nanoparticles which reduces or eliminates the use and generation of hazardous substances is presented. The utility of vitamins B1 and B2...
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GREENHOUSE GASES AND AGRICULTURE |
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Agriculture ranks third in its contribution to Earth's anthropogenically nhanced greenhouse effect. Energy use and production and chlorofluorocarbons are anked first and second, re...
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GREENHOUSE GASES FROM SMALL-SCALE COMBUSTION DEVICES IN DEVELOPING COUNTRIES, CHARCOAL-MAKING KILNS IN THAILAND |
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The report gives results of measurements of airborne emissions, during typical operating conditions, from charcoal-making kilns commonly used in the developing world. The kilns tes...
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GREENHOUSE GASES FROM SMALL-SCALE COMBUSTION DEVICES IN DEVELOPING COUNTRIES, CHARCOAL-MAKING KILNS IN THAILAND (EPA/600/R-99/109) |
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The report gives results of measurements of airborne emissions, during typical operating conditions, from charcoal-making kilns commonly used in the developing world. The kilns tes...
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GREENHOUSE GASES FROM SMALL-SCALE COMBUSTION DEVICES IN DEVELOPING COUNTRIES: PHASE IIA HOUSEHOLD STOVES IN INDIA |
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This report presents a database containing a systematic set of measurements of the CO2, CO, CH4, TNMOC, N2O, SO2, NO2, and TSP emissions from the most common combustion devices in ...
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GREENHOUSE GASES FROM SMALL-SCALE COMBUSTION IN DEVELOPING COUNTRIES -- A PILOT STUDY IN MANILA |
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The report gives results of sampling of combustion gases released by household cookstoves in Manila, Philippines. n a total of 24 samples, 14 cookstoves were tested, fueled by liqu...
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GREENOUSE GASES FROM SMALL-SCALE COMBUSTION DEVICES IN DEVELOPING COUNTRIES, PHASE IIA. HOUSEHOLD STOVES IN INDIA |
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The report contains a systematic set of measurements of carbon dioxide (CO2), carbon monoxide, methane, total non-methane organic compounds, nitrous oxide, sulfur dioxide, nitrogen...
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GREENOUSE GASES FROM SMALL-SCALE COMBUSTION DEVICES IN DEVELOPING COUNTRIES, PHASE IIA. HOUSEHOLD STOVES IN INDIA (EPA/600/R-00/052) |
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The report contains a systematic set of measurements of carbon dioxide (CO2), carbon monoxide, methane, total non-methane organic compounds, nitrous oxide, sulfur dioxide, nitrogen...
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GRIDDED ANNUAL POLLUTANT EMISSIONS EAST OF THE ROCKY MOUNTAINS |
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Annual pollutant emissions of particulates, sulfur dioxide, nitrogen oxides, hydrocarbons, and carbon monoxide from point and area sources are apportioned to 80-km grid squares on ...
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GROWTH AND PERSISTENCE OF PATHOGENS ON GRANULAR ACTIVATED CARBON FILTERS |
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Three enteric pathogens Yersinia enterocolitica 0:8, Salmonella typhimurium, and enterotoxigenic Escherichia coli, were examined for their ability to colonize granular activated ca...
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GROWTH OF HETROTROPHIC BIOFILMS IN A WATER DISTRIBUTION SYSTEM SIMULATOR |
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The U.S. EPA has designed and constructed a distribution system simulator (DSS) to evaluate factors which influence water quality within water distribution systems. Six individual...
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GUIDE TO CLEANER TECHNOLOGIES: ORGANIC COATING REPLACEMENTS |
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This guide describes available and emerging cleaner technologies that can be used to reduce emissions and wastes from paint and coatings applications. Environmental concerns and in...
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GUIDELINES FOR USING OZIPM-3 WITH CBM-X OR OPTIONAL MECHANISMS. VOLUME 1. DESCRIPTION OF THE OZONE ISOPLETH PLOTTING PACKAGE, VERSION 3 |
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A computer program, called Ozone Isopleth Plotting with Optional Mechanisms/Version 3 (OZIPM-3), has been developed. The program enables the use of a new Carbon Bond Mechanism (CBM...
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GUIDELINES FOR USING OZIPM-3 WITH CBM-X OR OPTIONAL MECHANISMS. VOLUME 2. COMPUTER CODE |
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A computer program, called Ozone Isopleth Plotting with Optional Mechanisms/Version 3 (OZIPM-3), has been developed. The program enables the use of a new Carbon Bond Mechanism (CBM...
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GWERD MONITORING OF PRB PERFORMANCE AT CIMARRON PORK FIELD SITE - UPDATE 2005 |
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GWERD personnel have been invited to help evaluate the performance of a carbon-based permeable reactive barrier (PRB) that was constructed for in-situ bioremediation of a ground wa...
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Geomorphic stream restoration as an approach for reducing nutrients in degraded urban watersheds |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. Stream restoration may improve the nutrient removal capacity of streams, yet few studies have...
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Green Synthetic Alternatives to Organic Compounds and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Green Synthetic Alternatives to Organic Compounds and Nanomaterials-May 2008 |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Green Synthetic Alternatives to Organic Molecules and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Greener Alternatives to Expedient Synthesis of Heterocycles and Nanomaterial |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Greener Biomimetic Approach to the Synthesis of Nanomaterials and Nanocomposite |
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A brief account of greener production of nanoparticles which reduces or eliminates the use and generation of hazardous substances is presented. The utility of vitamins B1 and B2, w...
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Greener Synthesis of Organics and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Greener Synthetic Alternatives to Organic Molecules and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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HALOCARBON INTERFERENCES IN CHEMILUMINESCENT MEASUREMENTS OF NOX |
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Anomalous NOx responses were observed when halocarbons were irradiated in the presence of oxides of nitrogen. Interferences to chemiluminescent NOx monitor using heated carbon conv...
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HANDBOOK ON TREATMENT OF HAZARDOUS WASTE LEACHATE |
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Various treatment processes were evaluated for their applicability and effectiveness in treating leachate from hazardous waste land disposal facilities. These technologies include ...
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HAVE U.S. SURFACE WATERS RESPONDED TO THE 1990 CLEAN AIR ACT AMENDMENTS? |
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Title IV of the 1990 Clean Air Act Amendments (CAAA) set target reductions for sulfur and nitrogen emissions from industrial sources as a means of reducing the acidity in depositio...
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HAZARDOUS WASTE DEGRADATION BY WOOD DEGRADING FUNGI |
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The persistence and toxicity of many hazardous waste constituents indicates that the environment has limited capacity to degrade such materials. he competence and presence of degra...
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HEALTH AND ENVIRONMENTAL EFFECTS PROFILE FOR CARBON DISULFIDE |
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The Health and Environmental Effects Profile for Carbon Disulfide was prepared to support listings of hazardous constituents of a wide range of waste streams under Section 3001 of ...
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HEALTH AND ENVIRONMENTAL IMPACT OF NANOTECHNOLOGY: TOXICOLOGICAL ASSESSMENT OF MANUFACTURED NANOPARTICLES |
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The microtechnology of the second half of the 20th century has produced a technical revolution that has lead to the production of computers, the Internet and taken us into a new em...
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HEALTH ASSESSMENT DOCUMENT FOR ACETALDEHYDE. EXTERNAL REVIEW DRAFT |
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Acetaldehyde, a chemical intermediate in the synthesis of several organic compounds, is rapidly and completely absorbed and is extensively metabolized to acetate, carbon dioxide, a...
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HEALTH ASSESSMENT DOCUMENT FOR CARBON TETRACHLORIDE (DRAFT) |
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The Office of Health and Environmental Assessment, in consultation with an Agency Work Group, has prepared this Health Assessment on Carbon Tetrachloride to serve as a 'Source Docu...
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HEALTH ASSESSMENT DOCUMENT FOR CARBON TETRACHLORIDE. FINAL REPORT |
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Carbon tetrachloride (CC14) is a haloalkane with a wide range of industrial and chemical applications. Its presence in the atmosphere and in water appears to be of anthropogenic or...
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HEALTH ASSESSMENT DOCUMENT FOR DICHLOROMETHANE (METHYLENE CHLORIDE) |
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Dichloromethane (methylene chloride) is known to be metabolized to carbon monoxide in man and animals, primarily by the liver. Because the oxygen content of blood is decreased, dep...
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HEALTH ASSESSMENT DOCUMENT FOR POLYCYCLIC ORGANIC MATTER |
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The document responds to Section 122 of the Clean Air Act as Amended August 1977, which requires the Administrator to decide whether atmospheric emissions of polycyclic organic mat...
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HEALTH EFFECTS ASSESSMENT FOR CARBON TETRACHLORIDE |
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The document represents a brief, quantitatively oriented scientific summary of health effects data. It was developed by the Environmental Criteria and Assessment Office to assist t...
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HEALTH EFFECTS ASSOCIATED WITH POTENTIAL EXPOSURES TO PM2.5, OZONE AND CARBON MONOXIDE IN THE RTP PM PANEL STUDY |
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Epidemiologic studies indicate that exposure to fine particles (PM 2.5) is associated with hospital admissions and premature deaths. In addition, heart rate variiability has been ...
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HEALTH EFFECTS OF EXPOSURE TO AMBIENT CARBON MONOXIDE. |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the Technical Information Staff at the ...
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HEALTH RISK PERSPECTIVES ON FUEL OXYGENATES |
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This document updated the 1993 Assessment of Potential Health Risks of Gasoline Oxygenated with Methyl Tertiary Butyl Ether and provided background information to help the reader u...
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HEPATIC POLYAMINES AND RELATED ENZYMES FOLLOWING CHLORDECONE POTENTIATED CARBON TETRACHLORIDE TOXICITY IN RATS |
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Previous work has shown that dietary exposure of rats to non-toxic levels of chlordecone (10 parts per million) for 15 days and a subsequent intraperitoneal injection of a low, non...
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HEPATOTOXIC INTERACTIONS OF ETHANOL WITH ALLYL ALCOHOL OR CARBON TETRACHLORIDE IN RATS |
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To assess interactive toxicity following subacute, concurrent chemical exposure, male Fischer-344 rats, approximately 70 days of age, were given ethanol at 0, 0.'05, 0.1, 0.2, or 0...
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HETERODIMERIZATION OF PROPYLENE AND VINYLARENES: FUNCTIONAL GROUP COMPATIBILITY IN A HIGHLY EFFICIENT NI-CATALYZED CARBON-CARBON BOND-FORMING REACTION. (R826120) |
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AbstractUnlike heterodimerization reactions of ethylene and vinylarenes, no such synthetically useful reactions using propylene are known. We find that propylene reacts...
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HETERODIMERIZATION OF PROPYLENE AND VINYLARENES: FUNCTIONAL GROUP COMPATIBILITY IN A HIGHLY EFFICIENT NI-CATALYZED CARBON-CARBON BOND-FORMING REACTION. (R826120) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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HETEROGENEOUS SOOT NANOSTRUCTURE IN ATMOSPHERIC AND COMBUSTION SOURCE AEROSOLS |
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Microscopic images of soot emissions from wildfire and a wide range of anthropogenic combustion sources show that the nanostructures of individual particles in these emissions are ...
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HIGH ALTITUDE TESTING OF RESIDENTIAL WOOD-FIRED COMBUSTION EQUIPMENT |
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To determine whether emissions from operating a wood stove at high altitude differ from those at low altitude, a high altitude sampling program was conducted which was compared to ...
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HIGH PRECISION ISOTOPE RATIO MASS SPECTROMETRY METHOD FOR MEASURING THE O2/N2 RATIO OF AIR |
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Studies of the distribution of O2 in air will inform us about critical problems in the global carbon cycle which are not readily accessed by other measurements, including the rate ...
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HIGH RESOLUTION MODELLING OF PCB CONGENERS IN LAKE MICHIGAN USING THE LAKE MICHIGAN (LM3) CONTAMINANT MODEL |
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The Lake Michigan Level 3 (LM3) Model is a numerical model of Lake Michigan used to predict the fate and transport of 54 PCB congeners. The LM3 model segments Lake Michigan horizon...
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HIGH TEMPERATURE ADSORPTION OF CO2 ON VARIOUS HYDROTALCITE-LIKE COMPOUNDS |
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This study describes and quantifies how substitution of the divalent cation and interlayer charge compensating anions affect the CO2 adsorptive capacity of various hydrotalcite-lik...
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HIGH VOLTAGE ENVIRONMENTAL APPLICATIONS, INC.ELECTRON BEAM TECHNOLOGY - INNOVATIVE TECHNOLOGY EVALUATION REPORT |
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This report evaluates a high-voltage electron beam (E-beam) technology's ability to destroy volatile organic compounds (VOCs) and other contaminants present in liquid wastes. Spec...
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HIGHWAY MOTOR VEHICLES AS SOURCES OF ATMOSPHERIC PARTICLES: PROJECTED TRENDS 1977 TO 2000 |
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Highway motor vehicle emissions contribute to the total atmospheric particulate burden. The possible health and welfare effects of these emissions depend upon their composition and...
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HORIZONTAL LASAGNA TO BIOREMEDIATE TCE |
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Removal of TCE from these tight clay soils has been technically difficult and expensive. However, the LASAGNATM technique allows movement of the TCE into treatment zones for biode...
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HORIZONTAL LASAGNA^TM TO BIOREMEDIATE TCE |
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Removal of TCE from these tight clay soils has been technically difficult and expensive. However, the LASAGNA technique allows movement of the TCE into treatment zones for biodegra...
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HOW GOOD ARE AMBIENT AIR POLLUTION MEASUREMENTS |
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In accordance with Federal regulations, state and local air pollution control agencies have, since January 1, 1981, been performing special checks of their ambient air measurement ...
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HPLC DETERMINATION OF CYANURIC ACID IN SWIMMING POOL WATERS USING PHENYL AND CONFIRMATORY POROUS GRAPHITIC CARBON COLUMNS |
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The chlorinated salts of cyanuric acid have found an important role in recreational swimming pool waters across the United States. Upon application to pool water, they can (1) rel...
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HSPF Toolkit: a New Tool for Stormwater Management at the Watershed Scale |
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The Hydrological Simulation Program - FORTRAN (HSPF) is a comprehensive watershed model endorsed by US EPA for simulating point and nonpoint source pollutants. The model is used fo...
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HUMAN HEALTH DAMAGES FROM MOBILE SOURCE AIR POLLUTION: A DELPHI STUDY. VOLUME I |
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During the past year, the California Air Resources Board conducted a survey of 14 health experts on the human damages from mobile source air pollution. A variant of the Delphi tech...
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HUMIC ACID EFFECTS ON UPTAKE OF HEXACHLOROBENZENE AND HEXACHLOROBIPHENYL BY SHEEPSHEAD MINNOWS IN STATIC SEDIMENT/WATER SYSTEMS |
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The effect of humic acid on accumulation of hexachlorobenzene and hexachlorobiphenyl by sheepshead minnows (Cyprinodon variegatus) from two separate experiments is presented. tatic...
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HURRICANE IMPACTS ON U.S. FOREST CARBON SEQUESTRATION. (R828785) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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HYDEODECLORINATION OF CCI2F2 USING PD SUPPORTED ON Y-AL2O3 CATALYSTS |
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Chlorofluorocarbons (CFCs), along with other chlorine- and bromine-containing compounds, have been implicated in the accelerated depletion of ozone in the Earth's stratosphere....
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HYDROCARBON CONTINUOUS MONITORING SYSTEMS FOR HAZARDOUS WASTE INCINERATOR EMISSIONS MEASUREMENT |
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The U.S. Environmental Protection Agency has sponsored an extended laboratory and field evaluation of continuous emission monitoring systems available to measure hydrocarbon emissi...
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HYDRODEHALOGENATION OF 1- TO 3-CARBON HALOGENATED ORGANIC COMPOUNDS IN WATER USING A PALLADIUM CATALYST AND HYDROGEN GAS. (R825421) |
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Supported palladium (Pd) metal catalysts along with H2 gas show
significant potential as a technology which can provide rapid, on-site
destruction of halogena...
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HYDROGEN ABSTRACTION AND DECOMPOSITION OF BROMOPICRIN AND OTHER TRIHALOGENATED DISINFECTION BY-PRODUCTS BY GC/MS |
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Tribromonitromethane (bromopicrin), dibromochlorani-tromethane, bromodichloronitromethane, and trichloroni-tromethane (chloropicrin) have been identified as drinking water disinfec...
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HYDROGENATION OF 4-OXOISOPHORONE IN SUPERCRITICAL CO2 MEDIUM OVER ALUMINA SUPPORTED PALLADIUM CATALYST |
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Ketoisophorone or 4-oxoisophorone (2,6,6-trimethyl-cyclohex-2-ene-1,4-dione) is a cyclic enedione of tremendous industrial importance due to its use as a key intermediate in the sy...
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HYDROGENATION OF POLYCYCLIC AROMATIC COMPOUNDS USING NI SUPPORT ON H-BETA ZEOLITE IN SUPERCRITICAL CARBON DIOXIDE |
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The primary rationale for use of supercritical carbon dioxide as a solvent in hydrogenation is the elimination of mass transfer limitations, through enhancement of the solubility o...
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HYDROLOGIC FLOWPATHS INFLUENCE INORGANIC AND ORGANIC NUTRIENT LEACHING IN A FOREST SOIL |
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Hydrologic pathways through soil affect element leaching by determining the relative importance of biogeochemical processes such as sorption and decomposition. We used stable hydro...
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HYDROLYSIS |
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Hydrolytic processes provide the baseline loss rate for any chemical in an aqueous envi- ronment. Although various hydrolytic pathways account for significant degradation of certai...
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HYDROSILATION POLYMERIZATIONS WITH DIALLYL MONOMER - BENZENE SOLUTION VERSUS SUPERCRITICAL CARBON DIOXIDE. (R825503) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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HYNOL PROCESS ENGINEERING: PROCESS CONFIGURATION, SITE PLAN, AND EQUIPMENT DESIGN |
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The report describes the design of the hydropyrolysis reactor system of the Hynol process. (NOTE: A bench scale methanol production facility is being constructed to demonstrate the...
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HYNOL PROCESS EVALUATION |
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The report examines process alternatives for the optimal use of natural gas and biomass for production of fuel-cell vehicle fuel, emphasizing maximum displacement of petroleum and ...
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Homogeneous And Heterogeneous Activation Of Peroxymonosulfate With Iron-Based Catalysts |
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Polychlorinated biphenyls (PCBs) in the environment pose long-term risk to public health because of their persistent and toxic nature. This study investigates the degradation of P...
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How Are Changing Solar Ultraviolet Radiation and Climate Affecting Light-induced Chemical Processes in Aquatic Environments? |
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Changes in the ozone layer over the past three decades have resulted in increases in solar UV-B radiation (280-315 nm) that reach the surface of aquatic environments. These changes...
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Hydrology and Hyporheic Nitrogen Biogeochemistry in a Geomorphically Degraded Urban Stream |
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Few studies have investigated the relationship between hydrology and nitrogen biogeochemistry in hyporheic zones of degraded urban streams despite significant national efforts to r...
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Hydrology and Nitrogen Biogeochemistry in the Hyporheic Zone of a Geomorphically Degraded Urban Stream |
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Few studies have investigated the relationship between hydrology and nitrogen biogeochemistry in hyporheic zones of degraded urban streams despite significant national efforts to r...
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IDENTIFICATION AND CHARACTERIZATION OF AEROMONAS ISOLATES FROM DRINKING WATER DISTRIBUTION SYSTEMS |
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Members of the bacterial genus Aeromonas are commonly isolated from both fresh and salt waters worldwide and some are believed to cause infections in humans, including gastroenteri...
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IDENTIFICATION AND CHARACTERIZATION OF MISSING AND UNACCOUNTED FOR AREA SOURCE CATEGORIES |
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The report identifies and characterizes missing or unaccounted for area source categories. Area source emissions of particulate matter (TSP), sulfur dioxide (SO2), oxides of nitrog...
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IDENTIFICATION OF CARBON QUANTIFIABLE REGIONS IN THE FORMER SOVIET UNION USING UNSUPERVISED CLASSIFICATION OF AVHRR GLOBAL VEGETATION INDEX IMAGES |
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NO ABSTRACT PROVIDED...
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IDENTIFICATION OF CHLOROMETHANE FORMATION PATHS DURING ELECTROCHEMICAL DECHLORINATION OF TCE USING GRAPHITE ELECTRODES |
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The purpose of this research is to investigate the formation of chloromethane during TCE dechlorination in a mixed electrochemical reactor using graphite electrodes. Chloromethane ...
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IDENTIFICATION OF CHLOROMETHANE FROMATION PATHS DURING ELECTROCHEMICAL DECHLORINATION OF TCE USING GRAPHITE ELECTRODES |
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The purpose of this research is to investigate the formation of chloromethane during TCE dechlorination in a mixed electrochemical reactor using graphite electrodes. Chloromethane ...
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IDENTIFICATION OF COCARCINOGENS AND THEIR POTENTIAL MECHANISMS OF ACTION USING C3H10T(1/2)CL8 MOUSE EMBRYO FIBROBLASTS |
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The cocarcinogenic action of five agents which increase microsomal mixed-function oxidase activity in vivo was examined in the C3H101/2CL8 transformation assay. The compounds studi...
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IDENTIFICATION OF COMPONENTS OF ENERGY-RELATED WASTES AND EFFLUENTS |
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A state-of-the-art review on the characterization of organic and elemental substances in energy-related liquid and solid effluents was conducted. Previous and on-going research pro...
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IDENTIFICATION OF VOLATILE HYDROCARBONS AS MOBILE SOURCE TRACERS FOR FINE PARTICULATE ORGANICS |
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Several volatile organic compounds (VOCs) have been identified as candidates for tracers of fine particulate carbon and EOM from mobile sources. he identification resulted from a m...
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II BIOMARKERS OF OXIDATIVE STRESS STUDY: ARE OXIDATION PRODUCTS OF LIPIDS, PROTEINS AND DNA MARKERS IN CARBON TETRACHLORIDE POISONING? |
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Abstract
Oxidation products of lipids, proteins and DNA in the blood, plasma and urine of rats were measured as part of a comprehensive, multilaboratory validation study searchi...
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IMMUNOCHEMICAL DETERMINATION OF DIOXINS IN SEDIMENT AND SERUM SAMPLES |
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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are considered highly toxic contaminants and the environmental and biological monitoring of th...
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IMMUNOCHEMICAL DETERMINATION OF DIOXINS IN SEDIMENT SAMPLES |
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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are considered highly toxic contaminants with the environmental monitoring of these compounds be...
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IMMUNOTOXICOLOGIC ASSESSMENT OF SUBACUTE EXPOSURE OF RATS TO CARBON TETRACHLORIDE WITH COMPARISON TO HEPATOXICITY AND NEPHROTOXICITY |
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The immunotoxicity, hepatoxicity and nephrotoxicity of subacute exposure to carbon tetrachloride (CCl4) was evaluated In young adult (8-9 week old) male Fischer 344 rats, dosed by ...
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IMPACT OF AEROSOL LIQUID WATER ON SECONDARY ORGANIC AEROSOL YIELDS OF IRRADIATED TOLUENE/PROPYLENE/NOX/(NH4)2SO4/AIR MIXUTRES |
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Laboratory experiments were conducted to assess whether the presence of liquid water on pre-existing submicron ammonium sulfate aerosols affects yields of condensible organic com...
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IMPACT OF AN UPDATED CARBON BOND MECHANISM ON PREDICTIONS FROM THE CMAQ MODELING SYSTEM: PRELIMINARY ASSESSMENT |
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An updated and expanded Carbon Bond mechanism (CB05) has been incorporated into the Community Multiscale Air Quality modeling system to more accurately simulate wintertime, pristin...
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IMPACT OF CLIMATE CHANGE IN THE PACIFIC NORTHWEST |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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IMPACT OF CONSERVATION TILLAGE USE ON SOIL AND ATMOSPHERIC CARBON IN THE CONTIGUOUS UNITED STATES |
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Soil organic matter is the largest global terrestrial C pool and is a source of CO2, CH4 and other greenhouse gases. hanges in soil organic C (SOC) content and fossil fuel C emissi...
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IMPACT OF DRINKING WATER TREATMENT ON ASSIMILABLE ORGANIC CARBON |
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Regrowth in the drinking water distribution system is a primary concern for water utilities. he disinfection process, although normally efficient for primary inactivation, is not a...
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IMPACT OF NATURAL HYDROCARBONS ON AIR QUALITY |
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The emissions, reactivities, and ozone-forming potential of natural hydrocarbons are discussed. A review of the data available on emission levels for natural hydrocarbons indicates...
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IMPACT OF O3 ON LEAF CONSTRUCTION COST AND CARBON ISOTOPE DISCRIMINATION |
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Plant response to ozone (O3) is controlled by the interactive balance between avoidance and intolerance processes. ush bean (Phaseolus vulgaris L.) plants were exposed to O3 in ope...
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IMPACT OF ORGANIC COMPOUNDS ON THE CONCENTRATIONS OF LIQUID WATER IN AMBIENT PM2.5 |
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A field study was undertaken during the summer of 2000 to assess the impact of the presence of organic compounds on the liquid water concentrations of PM2.5 samples. The selecte...
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IMPACT OF OXYGEN MEDIATED OXIDATIVE COUPLING ON ADSORPTION KINETICS |
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The presence of molecular oxygen in the test environment promotes oxidative coupling (polymer formation) of phenolic compounds on the surface of granular activated carbon (GAC). Bo...
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IMPACT OF PREOZONATION AND BIODEGRADATION OF DISINFECTION BY-PRODUCT FORMATION |
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Ozonation and biological treatment were investigated as a means of controlling the formation of disinfection by-products (DBPs) as measured by total organic halides (TOX) and purge...
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IMPACT OF URBAN STORM RUNOFF ON STREAM QUALITY NEAR ATLANTA, GEORGIA |
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The objective of this study was to assess the impact of stormwater runoff from point and nonpoint sources on the water quality of receiving streams in the Atlanta area. Emphasis wa...
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IMPACT ON WATER DISTRIBUTION SYSTEM BIOFILM DENSITIES FROM REVERSE OSMOSIS MEMBRANE TREATMENT OF SUPPLY WATER |
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The quality of potable water is such that the concentration of nutrients available for growth of microorganisms within distribution systems is limited. In such systems carbon is of...
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IMPACTS OF AIR POLLUTION AND CLIMATE CHANGE ON FOREST ECOSYSTEMS - EMERGING RESEARCH NEEDS |
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Outcomes from the 22nd meeting for Specialists in Air Pollution Effects on Forest Ecosystems "Forests under Anthropogenic Pressure - Effects of Air Pollution, Climate Change and Ur...
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IMPACTS OF CLIMATE CHANGE ON NET PRODUCTIVITY OF COASTAL WATERS: IMPLICATIONS FOR CARBON BUDGET AND HYPOXIA. (R827785E02) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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IMPACTS OF CLIMATE CHANGE ON RICE YIELD: EVALUATION OF THE EFFICACITY OF DIFFERENT MODELING APPROACHES |
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Increasing concentrations of carbon dioxide (CO2) and other greenhouse gases are expected to modify the climate of the earth in the next 50-100 years. echanisms of plant response t...
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IMPACTS OF LAND USE CHANGE AND FIRE ON NUTRIENT AND CARBON CYCLES AND TRACE GAS EXCHANGE IN SOILS OF THE CERRADO IN CENTRAL BRAZIL |
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The Brazilian cerrado is experiencing rapid land use changes that are often accompanied by fire. Here we report initial studies of the effects of fire and land use change on the co...
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IMPLICATIONS OF GLOBAL CLIMATE CHANGE FOR WESTERN AGRICULTURE |
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Global climate change from increases in atmospheric carbon dioxide and other trace gases is an issue of international concern. dverse climatic conditions are expected to reduce cro...
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IMPORTANCE OF "GREEN TIDES" IN A PACIFIC NORTHWEST ESTUARY: PRODUCTION DYNAMICS OF EELGRASS (ZOSTERA MARINA), DWARF EELGRASS (Z. JAPONICA) AND ENTEROMORPHA SPP. |
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Benthic macrophytes play a large role in the ecology and biogeochemistry of estuaries. I examine the relative contribution of macrophytes (seagrass and macroalgae) to overall prod...
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IMPORTANCE OF ACTIVATED CARBON'S OXYGEN SURFACE FUNCTIONAL GROUPS ON ELEMENTAL MERCURY ADSORPTION |
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The effect of varying physical and chemical properties of activated carbons on adsorption of elemental mercury [Hg(0)] was studied by treating two activated carbons to modify their...
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IMPORTANCE OF BLACK CARBON IN DISTRIBUTION AND BIOACCUMULATION MODELS OF POLYCYCLIC AROMATIC HYDROCARBONS IN CONTAMINATED MARINE SEDIMENTS |
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The roles and relative importance of nonpyrogenic organic carbon (NPOC) and black carbon (BC) as binding phases of polycyclic aromatic hydrocarbons (PAHs) were assessed by their ab...
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IMPORTANCE OF BLACK CARBON TO THE BIOAVAILABILITY OF PAHS TO MARINE SPECIES |
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Poster Presentation at the EPA Science Forum...
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IMPORTANCE OF EXPERIMENTER-BLIND PROCEDURE IN NEUROTOXICOLOGY |
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The importance of having the investigator blind to the experimental condition of a human subject was demonstrated using meta analysis of 43 reports of the effects of carbon monoxid...
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IMPORTANCE OF ORGANIC CARBON QUANTITY ON THE VARIATION OF KOC IN MARINE SEDIMENTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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IMPROVED MODEL FOR ESTIMATING EMISSIONS OF VOLATILE ORGANIC COMPOUNDS FROM FORESTS IN THE EASTERN UNITED STATES |
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The article discusses an improved model for estimating emissions of volatile organic compounds (VOCS) from forests in the Eastern U. S. Regional estimates of biogenic volatile orga...
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IMPROVED OR NEW METHODS OR TECHNOLOGIES FOR STORAGE REMEDIATION OF MINE WASTES, INCLUDING ENGINEERED WETLANDS AND PERMEABLE REACTIVE BARRIERS |
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Discussion of new or improved methods or technologies for storage remediation of mine waste including engineered wetlands and permeable reactive barriers....
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IMPROVED SELECTIVE ELECTROCATALYTIC OXIDATION OF PHENOLS BY TYROSINASE-BASED CARBON PASTE ELECTRODE BIOSENSOR |
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Tyrosinase-based carbon paste electrodes are evaluated with respect to the viscosity and polarity of the binder liquids. The electrodes constructed using a lower viscosity minera...
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IMPROVED TECHNIQUE FOR MONITORING ELECTROCARDIOGRAMS DURING EXPOSURE TO RADIO-FREQUENCY RADIATION |
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Studies were conducted which examined the effects of radio frequency (RF) radiation on heart rate (HR), deep body temperature (TEMP), and electrocardiographic (ECG) waveform parame...
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IMPROVING SOURCE PROFILES AND APPORTIONMENT OF COMBUSTION SOURCES USING THERMAL CARBON FRACTIONS IN MULTIVARIATE RECEPTOR MODELS |
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The purpose of this study was to improve combustion source profiles and apportionment of a PM2.5 urban aerosol by using 7 individual organic and elemental carbon thermal fraction...
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IN SITU AND EX SITU BIODEGRADATION TECHNOLOGIES FOR REMEDIATION OF CONTAMINATED SITES [ENGINEERING ISSUE) |
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Bioremediation is a grouping of technologies that use microbiota (typically, heterotrophic bacteria and fungi) to degrade or transform hazardous contaminants to materials such as c...
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IN SITU BIOASSAYS OF BROOK TROUT (SALVELINUS FONTINALIS) AND BLACKNOSE DACE (RHINICHTHYS ATRATULUS) IN ADIRONDACK STREAMS AFFECTED BY EPISODIC ACIDIFICATION |
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In situ bioassays were conducted using native Adirondack brook trout and blacknose dace in four headwater streams. onductivity, pH, temperature, and stage height were monitored con...
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IN SITU ESTIMATES OF FOREST LAI FOR MODIS DATA VALIDATION |
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Satellite remote sensor data are commonly used to assess ecosystem conditions through synoptic monitoring of terrestrial vegetation extent, biomass, and seasonal dynamics. Two comm...
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IN SITU FORMED SOOT DEPOSIT AS A CARBON SOURCE FOR POLYCHLORINATED DIBENZO-P- DIOXINS AND DIBENZOFURANS |
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In Situ Formed Soot Deposit as a Carbon Source for Polychlorinated Dibenzo-p- dioxins and Dibenzofurans
For a PDF copy of this paper, email a request to
RTP_APPCD_Archivi...
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IN SITU SOIL VAPOR EXTRACTION TREATMENT |
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Soil vapor extraction (SVE) is designed to physically remove volatile compounds, generally from the vadose or unsaturated zone. t is an in situ process employing vapor extraction w...
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IN SITU TREATMENT OF HAZARDOUS MATERIAL SPILLS IN FLOWING STREAMS |
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Two methods of applying activated carbon adsorption treatment to flowing streams were evaluated under comparable conditions. The first involved subsurface introduction of buoyant c...
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IN VIVO EVIDENCE OF FREE RADICAL FORMATION AFTER ASBESTOS INSTILLATION: AN ESR SPIN TRAPPING INVESTIGATION |
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It has been postulated that the in vivo toxicity of asbestos results from its catalysis of free radical generation. We examined in vivo radical production using electron spin r...
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IN VIVO EVIDENCE OF FREE RADICAL FORMATION IN THE RAT LUNG AFTER EXPOSURE TO AN EMISSION SOURCE AIR POLLUTION PARTICLE |
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Exposure to air pollution particles can be associated with increased human morbidity and mortality. The mechanism(s) of lung injury remains unknown. We tested the hypothesis that l...
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IN-FLIGHT CAPTURE OF ELEMENTAL MERCURY BY A CHLORINE-IMPREGNATED ACTIVATED CARBON |
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The paper discusses the in-flight capture of elemental mercury (Hgo) by a chlorine (C1)-impregnated activated carbon. Efforts to develop sorbents for the control of Hg emissions ha...
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IN-PLACE REGENERATION OF GAC USING FENTON'S REAGENTS |
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This paper evaluates the feasibility of using Fenton’s reagents for in-place recovery of spent granular activated carbon (GAC). Fenton’s reagents are cycled through spent GAC to d...
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IN-PLACE REGENERATION OF SVE LOADED GAC USING FENTON'S REAGENTS |
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Ten out of the 25 most frequently detected groundwater contaminants at hazardous waste sites are chlorinated volatile organic compounds (VOCs) 1. Trichloroethylene (TCE) and tetra...
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IN-PLACE REGENERATION OF SVE LOADED GAC USING FENTON'S REAGENTS |
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Ten out of the 25 most frequently detected groundwater contaminants at hazardous waste sites are chlorinated volatile organic compounds (VOCs) 1 . Trichloroethylene (TCE) and tet...
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IN-SITU BIOTRANSFORMATION OF CARBON TETRACHLORIDE UNDER ANOXIC CONDITIONS |
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This field and laboratory project evaluated the possibility of stimulating a native bacterial population to biotransform carbon tetrachloride (CT) under anoxic conditions. In addit...
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IN-SITU CHEMICAL OXIDATION - DNAPL MASS REDUCTION TECHNOLOGY |
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In-situ chemical oxidation (ISCO) is a rapidly developing technology used at hazardous waste sites where oxidants and complimentary reagents are injected into the subsurface to tra...
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IN-SITU TRANSFORMATION OF CARBON TETRACHLORIDE AND OTHER HALOGENATED COMPOUNDS RESULTING FROM BIOSTIMULATION UNDER ANOXIC CONDITIONS. (R825689C051) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INACTIVATION AND UTILIZATION BY BACTERIA OF COLIPHAGE T1 AS A SOURCE OF CARBON AND NITROGEN FOR GROWTH. (R826107) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INACTIVATION OF MS2 VIRUS IN DRINKING WATER: ATLANTIC ULTRAVIOLET CORPORATION MEGATRON UNIT, MODEL M250 AT CHULA VISTA, CALIFORNIA |
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Verification testing of the Atlantic Ultraviolet Megatron M250 system was conducted over a 48-day period from 11/01/01 to 12/18/01. The feedwater to the ultraviolet (UV) unit duri...
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INACTIVATION OF MS2 VIRUS IN DRINKING WATER: TROJAN TECHNOLOGIES, INC., UVSWIFT ULTRAVIOLET SYSTEM MODEL 4L12, AT CHULA VISTA, CALIFORNIA. |
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Verification testing of the Trojan Technologies UVSwift 4L12 system was conducted over a 45 day period from 9/1/01 to 10/15/01. The feedwater to the ultraviolet (UV) unit during t...
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INCINERATOR OPERATING PARAMETERS WHICH CORRELATE WITH PERFORMANCE |
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Two sets of tests were carried out; in the first set, a series of six different experiments were conducted in which five different organic compounds diluted in heptane were burned ...
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INCREASED IL-8 AND IL-6 EXPRESSION IN HUMAN AIRWAY EPITHELIAL CELLS EXPOSED TO CARBON ULTRAFINE PARTICLES |
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INCREASED IL-6 AND IL-8 EXPRESSION IN HUMAN AIRWAY EPITHELIAL CELLS EXPOSED TO CARBON ULTRAFINE PARTICLES.
R Silbajoris1, A G Lenz2, I Jaspers3, J M Samet1. 1NHEERL, USEPA, RTP,...
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INDEPENDENT PHYSICAL-CHEMICAL TREATMENT OF RAW SEWAGE |
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A 3.17 l/sec (50 gpm) pilot plant evaluation of the independent physical-chemical treatment (IPC) process was conducted for 27-months at Pomona, California. The pilot plant consist...
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INDIUM AND ZINC MEDIATED ONE-ATOM CARBOCYCLE ENLARGEMENT IN WATER. (R822668) |
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AbstractSix-, seven-, eight-membered rings are enlarged by one carbon-atom into seven-, eight- and nine-membered ring derivatives respectively, via indium or zinc me...
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INDIUM MEDIATED REACTIONS IN WATER: SYNTHESIS OF BETA-HYDROXYL ESTERS. (R822668) |
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AbstractA variety of  -hydroxyl esters were synthesized efficient...
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INDIVIDUAL AND POPULATION RESPONSES TO ABIOTIC STRESSES IN ITALIAN RYEGRASS |
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Expected changes in environmental factors will alter productivity of agroecosystems and influence the distribution of agricultural pests. In addition to the natural factors that ca...
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INDOOR AIR QUALITY DATA BASE FOR ORGANIC COMPOUNDS |
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The report gives results of the compilation of a data base for concentrations of organic compounds measured indoors. ased on a review of the literature from 1979 through 1990, the ...
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INDOOR AND OUTDOOR SOURCE CONTRIBUTIONS TO PERSONAL PM2.5 FOR A PANEL OF INDIVIDUALS WITH CARDIOVASCULAR DISEASE OR COPD LIVING IN BOSTON, MA |
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Repeated personal, home indoor, home outdoor, and ambient particulate and gaseous pollutant levels were characterized for individuals with cardiovascular disease or COPD and thei...
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INDOOR-OUTDOOR RELATIONSHIPS OF PARTICLES, PAH, AND BLACK CARBON IN AN OCCUPIED TOWNHOUSE |
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Real-time instrumentation for measuring particles, PAH, and black carbon (soot) has been operated since May of 1998 in an occupied 3-story town house in Reston, VA. Indoor and ou...
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INDOOR-OUTDOOR-PERSONAL RELATIONSHIPS OF SELECTED FINE PARTICLE TRACE ELEMENTS IN SEATTLE, WA |
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The overall goal of this work is to better understand not only the sources of outdoor PM but also the sources that contribute to personal PM exposures. This paper summarizes the...
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INDUCTION OF SPECIFIC PROTEINS IN EUKARYOTIC ALGAE GROWN UNDER IRON-, PHOSPHORUS-, OR NITROGEN-DEFICIENT CONDITIONS |
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What limits phytoplankton growth in nature? he answer is elusive because of methodological problems associated with bottle incubations and nutrient addition experiments. e are inve...
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INDUSTRIAL PROCESS PROFILES FOR ENVIRONMENTAL USE: CHAPTER 4. CARBON BLACK INDUSTRY |
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The catalog of Industrial Process Profiles for Environmental Use was developed as an aid in defining the environmental impacts of industrial activity in the United States Entries f...
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INDUSTRIAL WASTEWATER RECIRCULATION SYSTEM: PRELIMINARY ENGINEERING |
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The report details the preliminary engineering work done at Owens-Corning's (O-C's) Anderson, South Carolina, fibrous glass plant. The purpose of the work was to test, on a pilot p...
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INFLUENCE OF AIR MASS HISTORY ON BLACK CARBON CONCENTRATIONS AND REGIONAL CLIMATE FORCING IN SOUTHEASTERN UNITED STATES. (R825248) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INFLUENCE OF AMBIENT TEMPERATURE ON TAILPIPE EMISSIONS FROM LATE MODEL LIGHT-DUTY GASOLINE MOTOR VEHICLES |
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Motor vehicle emissions are sensitive to a number of variables including ambient temperature, driving schedule (speed vs time), and fuel composition. ydrocarbon, aldehyde, carbon m...
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INFLUENCE OF AQUEOUS ALUMINUM AND ORGANIC ACIDS ON MEASUREMENT OF ACID NEUTRALIZING CAPACITY IN SURFACE WATERS |
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Acid neutralizing capacity (ANC) is used to quantify the acid-base status of surface waters. Acidic waters have bean defined as having ANC values less than zero, and acidification ...
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INFLUENCE OF BED-REGION STOICHIOMETRY ON NITRIC OXIDE FORMATION IN FIXED-BED COAL COMBUSTION |
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The article describes the use of a 15.3 x 25.4 cm thick bed reactor with refractory walls to investigate the influence of bed-region (first-stage) stoichiometry on fuel nitrogen ev...
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INFLUENCE OF BISOLUTE COMPETITION ON THE DESORPTION KINETICS OF POLYCYCLIC AROMATIC HYDROCARBONS IN SOIL. (R825959) |
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The dual-mode (partition/hole-filling) model of soil organic matter (SOM) as
a heterogeneous polymerlike sorbent of hydrophobic compounds predicts that a
competing solut...
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INFLUENCE OF CCL4 BIOTRANSFORMATION ON THE ACTIVATION OF RAT LIVER PHOSPHOLIPASE C IN VITRO |
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The Influence of CCl4 Biotransforrnation on the Activation of Rat Liver Phospholipase C in Vitro. Coleman, J.F., Condie, L.W. AND LAMB, R.G. (1988). Toxicol. Appl Pharmacol. 95, 20...
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INFLUENCE OF COLLOIDS ON SEDIMENT-WATER PARTITION COEFFICIENTS OF POLYCHLORBIPHENYL CONGENERS IN NATURAL WATERS |
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Laboratory studies have shown that speciation of hydrophobic organic pollutants in aquatic systems is too complex to model as a linear, two-phase sorption equilibrium, due to ill-d...
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INFLUENCE OF COLLOIDS ON SEDIMENT-WATER PARTITION COEFFICIENTS OF POLYCHLOROBIPHENYL CONGENERS IN NATURAL WATERS |
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Laboratory studies have shown that speciation of hydrophobic organic pollutants in aquatic systems is too complex to model as a linear, two-phase sorption equilibrium due to ill-de...
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INFLUENCE OF DEEP OCEAN SEWAGE OUTFALLS ON THE MICROBIAL ACTIVITY OF THE SURROUNDING SEDIMENT |
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The microbial activity near two deep ocean sewage outfalls off the coast of the island of Oahu, HI, was characterized. Water samples and sediment samples to a depth of 4.5 cm were ...
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INFLUENCE OF DISSOLVED ORGANIC MATTER ON AGROCHEMICAL PHOTOREACTIONS IN AQUATIC ENVIRONMENTS |
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Pioneering studies by Don Crosby and co-workers demonstrated that the sunlight-induced dissipation of agrochemicals in water often is strongly affected by natural constituents in t...
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INFLUENCE OF EASILY DEGRADABLE NATURALLY OCCURRING CARBON SUBSTRATES ON BIODEGRADATION OF MONOSUBSTITUTED PHENOLS BY AQUATIC BACTERIA |
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The influence of readily degradable, naturally occurring carbon substrates on the biodegradation of several monosubstitued phenols (m-cresol, m-aminophenol, p-chlorophenol) was exa...
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INFLUENCE OF HYDRAULIC RETENTION TIME ON EXTENT OF PCE DECHLORINATION AND PRELIMINARY CHARACTERIZATION OF THE ENRICHMENT CULTURE. (R826694C703) |
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The extent of tetrachloroethene (PCE) dechlorination in two chemostats was evaluated as a function of hydraulic retention time (HRT). The inoculum of these chemostats was from a...
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INFLUENCE OF INORGANIC AND ORGANIC NUTRIENTS ON AEROBIC BIODEGRADATION AND ON THE ADAPTATION RESPONSE OF SUBSURFACE MICROBIAL COMMUNITIES |
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The influence of inorganic and organic amendments on the mineralization of ethylene dibromide, p-nitrophenol, phenol, and toluene was examined in subsurface soil samples from a pri...
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INFLUENCE OF METHYL TERT-BUTYL ETHER (MTBE) ON LAKE WATER ALGAE |
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Methyl tert-butyl ether (MTBE) has been used as an octane booster in gasoline in the United States since the 1970s. MTBE use increased greatly in the 1990s with the implementation ...
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INFLUENCE OF METHYL TERT-BUTYL ETHER (MTBE) ON LAKE WATER ALGAE: JOURNAL ARTICLE |
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NRMRL-ADA-01209
Kampbell*, D.H., An, Y, and Williams, VR. Influence of Methyl tert-Butyl Ether (MTBE) on Lake Water Algae. Bulletin of Env...
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INFLUENCE OF OXYGENATED FUELS ON THE EMISSIONS FROM THREE PRE-1985 LIGHT-DUTY PASSENGER VEHICLES |
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Tailpipe and evaporative emission from three pre-1985 passenger motor vehicles operating on a oxygenated blend fuel and on a nonoxygenated base fuel were characterized. mission dat...
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INFLUENCE OF PH ON THE REMOVAL OF ORGANICS BY GRANULAR ACTIVATED CARBON |
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Studies with miniature columns of granular activated carbon (GAC) demonstrated the importance of pH in the removal of total organic carbon and trihalomethane precursors from coagul...
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INFLUENCE OF PROTOZOAN GRAZING ON CONTAMINANT BIODEGRADATION. (R825418) |
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The influence of protozoan grazing on biodegradation rates in samples from contaminated aquifer sediment was evaluated under aerobic and anaerobic conditions. Predator¯ |
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INFLUENCE OF ROGUE DROPLET ATOMIZATION ON INCINERATION EFFECTIVENESS |
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The paper gives results of measuring the trajectories and carbon destruction efficiency of fuel oil droplets in a 100 kW combustor, in an effort to better understand the influence ...
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INFLUENCE OF SOLVENT AND SORBENT CHARACTERISTICS ON DISTRIBUTION OF PENTACHLOROPHENOL IN OCTANOL-WATER AND SOIL-WATER SYSTEMS |
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Sorbent and solvent characteristics influencing sorption of pentachlorophenol (PCP) were investigated. nalysis of aqueous sorption data for several sorbents over a broad pH range s...
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INFLUENCE OF SOOT CARBON ON THE BIOACCULUMATION OF SEDIMENT-BOUND POLYCYCLIC AROMATIC HYDROCARBONS BY MARINE BENTHIC INVERTEBRATES: AN INTERSPECIES COMPARISON |
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The sorption of polycyclic aromatic hydrocarbons (PAHs) to soot carbon in marine sediments has been hypothesized to reduce PAH bioavailability. This hypothesis was tested for eight...
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INFLUENCE OF THE SEAGRASS THALASSIA TESTUDINUM ON THE COMMUNITY COMPOSITION AND ACTIVITY OF SULFATE-REDUCING BACTERIA IN AN ESSENTIAL COAST MARINE HABITAT |
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Biogeochemical cycling of nutrients and sulfate reduction rates (SRR) were studied in relation to the community composition of sulfate-reducing bacteria SRB) in a Thalassia testudi...
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INFLUENCE OF TIME OF EXPOSURE TO CARBON TETRACHLORIDE ON TOXIC LIVER INJURY |
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The study was conducted to determine whether, and by what mechanisms, time of exposure could influence the ability of a model hepatotoxin, carbon tetrachloride (CCl4) to cause live...
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INFLUENCE OF WATER QUALITY ON ENTERIC VIRUS CONCENTRATION BY MICROPOROUS FILTER METHODS |
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Four enteric viruses, poliovirus type 1, echovirus type 1, reovirus type 3 and simian adenovirus SV-11, were concentrated from seeded 1.3L-volumes of raw, finished and granular act...
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INFLUENCES OF CARBON QUALITY AND MICROBIAL POPULATIONS UPON DISSOLVED ORGANIC MATTER DEGRADATION IN TWO STREAMS AND A DYSTROPHIC POND. (R829643) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INHALATION EXPOSURE TO METHYL TERT-BUTYL ETHER (MTBE) AND DIBROMOCHLOROMETHANE (DBCM) USING CONTINUOUS BREATH ANALYSIS |
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The oxygenate methyl tert-butyl ether (MTBE) has been added to gasoline to help meet national ambient air quality standards in those parts of the U.S. that are non-compliant...
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INHALED COMPLEX COMBUSTION EMISSIONS UPREGULATE TRANSCRIPTION AND ACTIVITY OF SYSTEMATIC MATRIX METALLOPROTEINASE-9 (MMP9): EVIDENCE IN MURINE AND HUMAN MODELS |
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Air pollution is associated with acute and chronic adverse human health effects related to atherosclerotic pathologies. MMP9 has a crucial role in the progression and ultimate deg...
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INHIBITION OF TRICHLOROETHYLENE OXIDATION BY THE TRANSFORMATION INTERMEDIATE CARBON MONOXIDE. (R825689C036) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INITIAL GROWTH AND ONTOGENY OF BIGLEAF MAPLE (ACER MACROPHYLLUM) IN AN ENRICHED CARBON DIOXIDE ENVIRONMENT |
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A controlled-environment experiment was initiated to evaluate the influence of CO2 enrichment on the growth and ontogeny of bigleaf maple (Acer macrophyllum). evelopment of seedlin...
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INITIAL PHASE OPTIMIZATION FOR BIOREMEDIATION OF MUNITION COMPOUND-CONTAMINATED SOILS |
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We examined the bioremediation of soils contaminated with the munition compounds 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine, and octahydro-1, 3,5,7-tetran...
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INTEGRATED LABORATORY AND FIELD CHARACTERIZATION OF ORGANIC CARBON IN PM 2.5 FORMED THROUGH CHEMICAL REACTIONS |
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An integrated laboratory and field research program is underway at the National Exposure Research Laboratory (NERL) to characterize organic carbon in PM2.5 (particulate ...
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INTEGRATED LAND-USE SYSTEMS: ASSESSMENT OF PROMISING AGROFOREST AND ALTERNATIVE LAND-USE PRACTICES TO ENHANCE CARBON CONSERVATION AND SEQUESTRATION |
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Degraded or sub-standard soils and marginal lands occupy a significant proportion of boreal, temperate and tropical biomes. anagement of these lands with a wide range of existing, ...
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INTEGRATING REMOTE SENSING AND ECOSYSTEM PROCESS MODELS FOR LANDSCAPE TO REGIONAL-SCALE ANALYSIS OF THE CARBON CYCLE. (R828309) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTEGRATION OF PHOTOCATALYTIC OXIDATION WITH AIR STRIPPING OF CONTAMINATED AQUIFERS |
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Bench scale laboratory studies and pilot scale studies in a simulated field-test situation were performed to evaluate the integration of gas-solid ultaviolet (UV) photocatalytic ox...
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INTERACTION OF CLIMATE AND LAND USE IN FUTURE TERRESTRIAL CARBON STORAGE AND RELEASE |
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The processes controlling total carbon (C) storage and release from the terrestrial biosphere are still poorly quantified. e conclude from analysis of paleodata and climate biome m...
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INTERACTION OF METALS AND ORGAINIC CARBON COLLOIDS IN ANOXIC INTERSTITIAL WATERS OF MARINE SEDIMENTS |
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Marine colloids are an important component of natural water geochemistry critical to the cycling, speciation and bioavailability of metals in marine sediments. In sediment, metals ...
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INTERACTION OF PLANAR AND NONPLANAR ORGANIC CONTAMINANTS WITH COAL FLY ASH: EFFECTS OF POLAR AND NONPOLAR SOLVENT SOLUTIONS |
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Coal fly ash has several uses but much of the material is treated as waste and disposed of in various ways including land filling. Coal fly ash also has a very high sorption capac...
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INTERACTIONS BETWEEN HETEROTROPHIC PLATE COUNT BACTERIA AND COLIFORM ORGANISMS |
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Studies were initiated to investigate the interactions between heterotrophic plate count bacteria and coliform organisms. The authors used spiked samples to show that heterotrophic...
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INTERACTIONS BETWEEN PHOTOCHEMICAL AND MICROBIAL DECOMPOSITION IN MODIFYING THE BIOLOGICAL AVAILABILITY AND OPTICAL PROPERTIES OF ESTUARINE DISSOLVED ORGANIC MATTER |
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Direct photodecomposition and photochemically-mediated bacterial degradation (via photochemical modification of otherwise refractory DOM into biologically labile forms) provide
...
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INTERACTIONS OF LIGHT AND CHEMICAL REACTIONS IN THE AQUATIC ENVIRONMENT: KINETIC AND MECHANISTIC ASPECTS |
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Changes in the ozone layer over the past two decades have resulted in increases in solar ultraviolet (UV) radiation that reaches the surface of aquatic environments. Recent studie...
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INTERACTIONS OF NUTRIENT AND CARBON CYCLES AND TRACE GAS EXCHANGE WITH LAND USE CHANGE AND FIRE IN THE CERRADO OF CENTRAL BRAZIL |
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Land use changes accompanied by fire frequently occur in the Brazilian cerrado. Here we report measurements in the cerrado of the effects of fire and land use change on the composi...
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INTERACTIONS OF SOLAR ULTRAVIOLET RADIATION AND DISSOLVED ORGANIC MATTER IN FRESHWATER AND MARINE ENVIRONMENTS |
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Solar radiation provides the primary driving force for the biogeochemical cycles upon which life and climate depend. Recent studies have demonstrated that the absorption of solar r...
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INTERACTIONS OF SOLAR UV RADIATION AND DISSOLVED ORGANIC MATTER IN AQUATIC ENVIRONMENTS |
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Changes in the ozone layer over the past two decades have resulted in increases in solar ultraviolet (UV) radiation that reaches the surface of aquatic environments. Recent studie...
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INTERACTIONS OF THE NANO-SIZED CARBONACEOUS PARTICLES WITH LUNG EPITHELIAL CELLS AND ALVEOLAR MACROPHAGES |
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Human beings especially in urban areas are exposed to automobile exhaust from truck or car diesel engines. The bulk of the suspended particles in diesel exhaust (diesel exhaust par...
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INTERACTIVE EFFECTS OF 03 AND CO2: IMPLICATIONS FOR TERRESTRIAL ECOSYSTEMS |
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The atmosphere supplies plants with CO2 for carbon fixation, producing carbon-containing compounds for structure and function of cells; and 02 to oxidize these carbon compounds, pr...
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INTERACTIVE EFFECTS OF CO2 AND O3 ON A PONDEROSA PINE PLANT/LITTER/SOIL MESOCOSM |
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To study individual and combined impacts of two important atmospheric trace gases, CO2 and O3, on C and N cycling in forest ecosystems; a four-year experiment using a small-scale p...
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INTERACTIVE EFFECTS OF CO2 SUPPLY AND GROWTH TEMPERATURE ON LEAF WATER RELATIONS OF DOUGLAS FIR |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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INTERACTIVE EFFECTS OF ELEVATED CO2 AND 03 ON RICE AND FLACCA TOMATO |
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All atmospheric concentrations of both carbon dioxide (CO2) and ozone (03) are increasing, with potentially dramatic effects on plants. This study was conducted to determine intera...
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INTERACTIVE EFFECTS OF O3 AND CO2: IMPLICATIONS FOR TERRESTRIAL ECOSYSTEMS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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INTERACTIVE EFFECTS OF OZONE AND CARBON DIOXIDE ON THE PONDEROSA PINE PLANT/LITTER/SOIL SYSTEM |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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INTERACTIVE EFFECTS OF OZONE DEPLETION AND CLIMATE CHANGE ON BIOGEOCHEMICAL CYCLES |
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The effects of ozone depletion on global biogeochemical cycles, via increased UV-B radiation at the Earth's surface, have continued to be documented over the past 4 years. In this ...
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INTERACTIVE EFFECTS OF SOLAR UV RADIATION AND CLIMATE CHANGE ON BIOGEOCHEMICAL CYCLING |
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This paper assesses research on the interactions of UV radiation (280-400 nm) and global climate change with global biogeochemical cycles at the Earth's surface. The effects of UV-...
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INTERCOMPARISON OF DPASV AND ISE FOR THE MEASUREMENT OF CU COMPLEXATION CHARACTERISTICS OF NOM IN FRESHWATER. (R825395) |
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Complexation by dissolved humic substances has an important influence on
trace metal behavior in natural systems. Unfortunately, few analytical
techniques are available ...
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INTERCOMPARISON OF OPTICAL REMOTE SENSING SYSTEMS FOR ROADSIDE MEASUREMENTS |
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The presentation describes results of an intercomparison of three optical remote sensing systems for measurements of nitric oxide emitted from passenger cars and light-duty trucks....
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INTERFACIAL ACTIVITY OF POLYMERIC SURFACTANTS AT THE POLYSTYRENE-CARBON DIOXIDE INTERFACE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTERIM GUIDELINES FOR THE DISPOSAL/DESTRUCTION OF PCBS AND PCB ITEMS BY NON-THERMAL METHODS |
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The report is an interim resource and guideline document to help EPA regional offices implement the polychlorinated biphenyl (PCB) regulations (40 CFR 761) for using non-thermal me...
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INTERIM REPORT ON PIC (PRODUCTS OF INCOMPLETE COMBUSTION) MINIMIZATION IN A RESEARCH COMBUSTOR |
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A series of five organic compounds (1,1,2,2-tetrachloroethane, trichloroethylene, Freon-113, carbon tetrachloride and chlorobenzene) were burned in heptane in a 100,000 Btu/hour wa...
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INTERLABORATORY METHODS COMPARISON FOR THE TOTAL ORGANIC CARBON ANALYSIS OF AQUIFER MATERIALS |
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The total organic carbon (TOC) content of aquifer materials has been found to have significant effects on the movement of pollutants in the subsurface environment. Accurate quantif...
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INTERNATIONAL APPROACHES TO DEVELOPING STANDARDS FOR NONCRITERIA POLLUTANTS |
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Much of the initial interest in the control of pollutants, both in the United States and abroad, focused on such "traditional" pollutants as sulfur dioxide, particulate matter, Tot...
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INTERPRETATION OF COMPLEX MOLECULAR MOTIONS IN SOLUTION. A VARIABLE FREQUENCY CARBON-13 RELAXATION STUDY OF CHAIN SEGMENTAL MOTIONS IN POLY(N-ALKYL METHACRYLATES) |
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An extensive variable temperature study of poly(n-butyl methacrylate) and poly(n-hexyl methacrylate) at two widely separated frequencies (67.9 and 22.6 MHz) has revealed that a mod...
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INTERPRETING URBAN CARBON MONOXIDE CONCENTRATIONS BY A COMPUTERIZED COHB MODEL |
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A practical, inexpensive computer model for estimating the level of blood carboxyhemoglobin (percent COHb) as a function of time for measured carbon monoxide concentrations (ppm CO...
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INTRA-URBAN GRADIENTS OF FINE PARTICULATE MATTER (PM2.5) IN THE EL PASO CHILDREN'S HEALTH STUDY |
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El Paso, Texas, a metropolitan area with over 500,000 residents, is located directly across the US/Mexico border from Ciudad Juarez with over 1 million residents. An estimated 18 ...
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INTRAMOLECULAR MOTION AND REORIENTATIONAL BARRIERS IN 9-FLUORENONE, 4-METHYL-9-FLUORENONE AND 4,5-DIMETHYL-9-FLUORENONE |
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Carbon-13 nuclear magnetic resonance spin-lattice relaxation times and nuclear Overhauser enhancements were measured as functions of temperature for the hydrogen-bearing carbons in...
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INVENTORY OF COMBUSTION-RELATED EMISSIONS FROM STATIONARY SOURCES |
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The report describes the first year of a study covering the combustion-related emissions inventory phase of a 3-year program entitled, 'Analysis of NOx Control in Stationary Source...
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INVENTORY OF COMBUSTION-RELATED EMISSIONS FROM STATIONARY SOURCES (FIRST UPDATE) |
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The report describes the first 2 years of a study covering the combustion-related emissions phase of a 3-year program entitled, 'Analysis of NOx Control in Stationary Sources.' The...
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INVENTORY OF CURRENT INDOOR AIR QUALITY-RELATED RESEARCH |
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The Inventory lists a total of 171 current or recently completed projects relating to indoor air quality. It covers six specific areas of research: monitoring, instrumentation, hea...
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INVESTIGATING THE ADSORPTION ARTIFACT DURING AEROSOL SAMPLING OF SEMI-VOLATILE ORGANIC CARBON. (R826372) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INVESTIGATING THE INFLUENCE OF LONG RANGE TRANSPORT ON MERCURY DEPOSITION IN SOUTH FLORIDA |
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In 1999, the US EPA National Exposure Research Laboratory (NERL) through a Regional Applied Research Effort initiated a study to evaluate the magnitude of long-range transport of...
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INVESTIGATION OF A SYSTEMATIC OFFSET IN THE MEASUREMENT OF ORGANIC CARBON WITH A SEMI-CONTINUOUS ANALYZER |
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Organic carbon was measured semi-continuously in laboratory experiments of steady-state secondary organic aerosol formed by hydrocarbon + NOx irradiations. Examination of the mass...
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INVESTIGATION OF ADVANCED THERMAL-CHEMICAL CONCEPTS FOR OBTAINING IMPROVED MSW-DERIVED PRODUCTS |
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Although a number of resource recovery from refuse programs have been effective, the quality of the products recovered could be enhanced to improve their marketability. The purpose...
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INVESTIGATION OF CONVENTIONAL MEMBRANE AND TANGENTIAL FLOW ULTRAFILTRATION ARTIFACTS AND THEIR APPLICATION TO THE CHARACTERIZATION OF FRESHWATER COLLOIDS |
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Artifacts associated with the fractionation of colloids in a freshwater sample were investigated for conventional membrane filtration (0.45 micron cutoff), and two tangential flow ...
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INVESTIGATION OF FLUID BED COMBUSTION OF MUNICIPAL SOLID WASTE |
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An experimental study was undertaken to burn processed municipal solid waste in a fluid-bed combustor containing water-cooled tubes in the bed. The 300-hour test was performed with...
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INVESTIGATION OF HYDROXYL RADICAL REACTIONS WITH O-XYLENE AND M-XYLENE IN A CONTINUOUS STIRRED TANK REACTOR (JOURNAL VERSION) |
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The gas phase reactions of hydroxyl radicals with o-Xylene and m-Xylene were studied in a continuous stirred tank reactor. Gas and aerosol products accounted for 65 to 85 percent o...
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INVESTIGATION OF LANDFILL LEACHATE POLLUTANT ATTENUATION BY SOILS |
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In this laboratory study using 11 soils from 7 major orders in the U.S., the movement and retention of As, Be, Cd, CN, Cr, Cu, Hg, Ni, Pb, Se, V, and Zn when carried by municipal s...
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INVESTIGATION OF POSSIBLE USES OF CFC/HALON CHEMICALS |
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The report documents an investigation of the possibility of alternate uses for surplus chlorofluorocarbon (CFC)/halon chemicals as they are replaced in their traditional service ro...
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INVESTIGATION OF POSSIBLE USES OF SURPLUS CFC/HALON CHEMICALS |
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The report documents an investigation of the possibility of alternate uses for surplus chlorofluorocarbon (CFC)/halon chemicals as they are replaced in their traditional service ro...
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INVESTIGATION OF RESPONSE DIFFERENCES BETWEEN DIFFERENT TYPES OF TOTAL ORGANIC CARBON (TOC) ANALYTICAL INSTRUMENT SYSTEMS |
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Total organic carbon (TOC) and dissolved organic carbon (DOC) have long been used to estimate the amount of natural organic matter (NOM) found in raw and finished drinking water. ...
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INVESTIGATION OF THE ENHANCED SUSCEPTIBILITY OF THE AGED RAT TO CARBON TETRACHLORIDE (CC14) BY DEVELOPMENT OF A PHYSIOLOGICALLY-BASED (PBPK) MODEL WITH AGE-SPECIFIC INPUT PARAMETERS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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INVESTIGATION OF THE INDOOR AIR QUALITY OF THE NORTH CAROLINA DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES AT 3800 BARRETT DRIVE, RALEIGH, NC |
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A limited-scale indoor air quality investigation was conducted over a 4 day period at the North Carolina Department of Environment, Health, and Natural Resources' offices located a...
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INVESTIGATION OF THE PATHWAYS TO PCDDS/FS FROM AN ETHYLENE DIFFUSION FLAME: FORMATION FROM SOOT AND AROMATICS |
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The formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDDs/Fs) has been shown to occur from the combustion products of fuels as complex as municipa...
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INVESTIGATION OF THE RADICAL-MEDIATED PRODUCTION OF BENZENE OXIDE PROTEIN ADDUCTS IN VITRO AND IN VIVO |
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High background levels of benzene oxide (BO) adducts with hemoglobin and albumin (BO-Hb and BO-Alb) have been measured in unexposed humans and animals. To test the influence of ...
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INVESTIGATION OF VERTICAL DISTRIBUTION AND MORPHOLOGY OF INDIGENOUS ORGANIC MATTER AT SLEEPING BEAR SITE, MICHIGAN |
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This study evaluates the nature and origin of particulate rganiccarbon and organic coatings on aquifer sends upgradient from a fuel pill site near the Sleeping Bear Dunes National ...
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INVLUENCE OF MACROMOLECULES ON CHEMICAL TRANSPORT |
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Macromolecules in the pore fluid influence the mobility of hydrophobic compounds through soils. his study evaluated the significance of macromolecules in facilitating chemical tran...
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IOMIDAZOLIUM-BASED INDIUM(III) TETRAHIDES: RECYCLABLE CATALYSTS FOR EFFICIENT COUPLING OF CARBON DIOXIDE WITH EXPOXIDES TO FORM CYCLIC CARBONATES |
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The transformation of CO2 an abundant greenhouse gas, into cyclic carbonates by coupling reaction with epoxides is receiving well-deserved attention. A series of imidazolium-based...
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ION EXCHANGE SOFTENING: EFFECTS ON METAL CONCENTRATIONS |
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A corrosion control pipe loop study to evaluate the effect of ion exchange water softening on metal leaching from household plumbing materials was conducted on two different water ...
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IRIS TOXICOLOGICAL REVIEW AND SUMMARY DOCUMENTS FOR CARBON TETRACHLORIDE |
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Carbon tetrachloride is a volatile haloalkane with a wide range of industrial and chemical applications. It is produced commercially from chlorination of a variety of low molecula...
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IRIS TOXICOLOGICAL REVIEW AND SUMMARY DOCUMENTS FOR CERIUM OXIDE (STABLE) AND COMPOUNDS |
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Cerium is a member of the lanthanoid series of rare earth metals. It is also the most abundant and most reactive of the rare earth metals. Cerium oxidizes at room temperature and...
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IRIS TOXICOLOGICAL REVIEW AND SUMMARY DOCUMENTS FOR HEXACHLOROETHANE |
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Hexachloroethane (HCE) is primarily used as a degassing agent in aluminum foundries and in the military for smoke pots, smoke grenades, and pyrotechnic devices. HCE is also used a...
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IRIS TOXICOLOGICAL REVIEW of CARBON TETRACHLORIDE (External Review Draft) |
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EPA is conducting a peer review of the scientific basis supporting the human health hazard and dose-response assessment of carbon tetrachloride that will appear on the Integrated R...
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IRON HYPOTHESIS: BASIC RESEARCH MEETS ENVIRONMENTAL POLICY |
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In October 1993, an interdisciplinary group of scientists spread 445 kg of iron over a 64 kM2 patch of surface ocean in the eastern equatorial Pacific. hey monitored the patch for ...
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IRON OPTIMIZATION FOR FENTON-DRIVEN OXIDATION OF MTBE-SPENT GRANULAR ACTIVATED CARBON |
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Fenton-driven chemical regeneration of granular activated carbon (GAC) is accomplished through the addition of H2O2 and iron (Fe) to spent GAC. The overall objective of this treat...
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IRON-PEROXYMONOSULFATE: A NOVEL SULFATE RADICAL BASED ADVANCED OXIDATION TECHNOLOGY FOR DEGRADATION OF PCBS |
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This study investigates the degradation of recalcitrant polychlorinated biphenyl (PCBs) using sulfate radical-based advanced oxidation technologies. Sulfate radicals are generated ...
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IS THERE A COMMON RESPONSE TO ULTRAVIOLET-B RADIATION BY MARINE PHYTOPLANKTON? |
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Global increases in ultraviolet-B radiation (UVBR) have the potential to alter marine primary production and to affect carbon cycles and marine trophic dynamics. stimates of UVBR i...
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IS YOUR TBA COMING FROM BIODEGRADATION OF MTBE |
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MTBE (methyl tertiary butyl ether) is present at high concentrations in ground water at many sites where gasoline has been spilled from underground storage tanks. In addition, TBA...
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ISOLATING AND EVALUATING ORGANIC TOXICANTS IN SEDIMENTS: EVALUATION OF AN EXPERIMENTAL APPROACH |
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Most solid-phase sediment toxicity identification and evaluation (TIE) techniques for organic chemicals have been focused on solid phase sorptive techniques, such as amending conta...
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ISOLATING AND FRACTIONATING ORGANIC TOXICANTS IN SEDIMENTS: EVALUATION OF AN EXPERIMENTAL APPROACH |
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Most solid-phase sediment TIE techniques for organic chemicals have been focused on solid phase sorptive techniques, such as amending contaminated sediments with the carbonaceousre...
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ISOLATION AND CHARACTERIZATION OF A FLUROANTHENE-UTILIZING STRAIN OF PSEUDOMONAS PAUCIMOBILIS |
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Fluoranthene, a high molecular weight PAH containing four fused rings, is naturally present in fossil fuels and derivatives thereof, and may be formed during the combustion of carb...
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ISOLATION AND CHARACTERIZATION OF THE ALKANE-INDUCIBLE NADPH-CYTOCHROME P-450 OXIDOREDUCTASE GENE FROM CANDIDA TROPICALIS |
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The gene coding for the Candida tropicalis NADPH-cytochrome P-450 oxidoreductase (CPR, NADPH: ferricytochrome oxidoreductase, EC 1.6.2.4) was isolated by immunoscreening of a C. tr...
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ISOLATION AND CONCENTRATION OF ORGANIC SUBSTANCES FROM WATER - USING SYNTHETIC RESINS AND GRAPHITIZED CARBON BLACK |
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This research program was initiated with the overall objective of developing a practical method for the concentration of trace amounts of organic compounds in water for use in biol...
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ISOLATION AND CONCENTRATION OF ORGANIC SUBSTANCES FROM WATER: AN EVALUATION OF SUPERCRITICAL FLUID EXTRACTION |
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This study describes the use of supercritical fluid carbon dioxide (SCF CO2), as an extraction solvent, for the isolation and concentration of twenty-three specified organic solute...
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ISOLATION OF ORGANIC WATER POLLUTANTS BY XAD RESINS AND CARBON |
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The recovery efficiencies of XAD resins -2, -4, -7, and -8 and of resin mixtures were measured using distilled water samples containing 13 organic pollutants. An equal-weight mixtu...
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ISOPRENE EMISSIONS AND PHOTOSYNTHESIS IN THREE FERNS: THE INFLUENCE OF LIGHT AND TEMPERATURE (JOURNAL VERSION) |
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A study was designed to determine the rates of isoprene emission and photosynthesis in three fern species and the independent influence of light and temperature on these processes....
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ISOPRENE/METHYL ACRYLATE DIELS-ALDER REACTION IN SUPERCRITICAL CARBON DIOXIDE. (R822721C640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ISOPRENE/METHYL ACRYLATE DIELS-ALDER REACTION IN SUPERCRITICAL CARBON DIOXIDE. (R826694C640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ISOTOPIC (14C) AND CHEMICAL COMPOSITION OF ATMOSPHERIC VOLATILE ORGANIC COMPOUND FRACTIONS - PRECURSORS TO OZONE FORMATION |
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Atmospheric volatile organic compounds (VOCs) are an important factor in the production of ozone near ground level [3]. Many hydrocarbons originate from auto exhaust. However, a ...
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ISOTOPIC AND ELEMENTAL VARIATIONS OF CARBON AND NITROGEN IN A MANGROVE ESTUARY |
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NO ABSTRACT PROVIDED...
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ISOTOPIC BIOGEOCHEMISTRY OF DISSOLVED ORGANIC NITROGEN: A NEW TECHNIQUE AND APPLICATION. (R825151) |
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We present a new technique for isolating and isotopically characterizing dissolved organic nitrogen (DON) for non-marine waters,  |
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ISOTOPIC EXCHANGE BETWEEN CARBON DIOXIDE AND OZONE VIA O('D) IN THE STRATOSPHERE |
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We propose a novel mechanism for isotopic exchange between CO2 and O3 via O(1D) + CO2 - CO3 followed by CO3 - CO2 + O(3P). ne dimensional model calculation shows that mechanism can...
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ISOTOPIC PATTERNS IN WOOD AND WOOD DECAY FUNGI DURING LOG DECOMPOSITION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ISOTOPIC STUDY OF THE INHALATION TOXICOLOGY OF OXIDANTS |
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The purpose of these studies was to develop novel methods to investigate the biological fate of inhaled ozone and other oxygen-containing pollutants in animal and human tissues usi...
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ISSUES IN ASSESSING LOW LEVEL IONIZABLE CONTAMINANT PARTITIONING IN SOILS AND SEDIMENTS |
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Solubilization has profound implications for such diverse risk assessment activities as assessing sediment contaminant porewater exposures to benthic fauna, determining half live...
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Impact of Mountaintop Mining/Valley Fill on the Stable Carbon Isotopic Composition and Concentration of Dissolved Organic Carbon and Dissolved Inorganic Carbon in Headwater Streams |
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Headwater streams are the dominant land-water interface across much of the landscape and provide many important ecological services. Cycling and transport of various carbon fractio...
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Impacts of Noise Barriers on Near-Road Air Quality |
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Numerous health studies show an increase in adverse health effects for populations near large roadways. A study was designed to assess traffic emission impacts on air quality near ...
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Injection of Contaminants into a Simulated Water Distribution System Equipped with Continuous Multi-Parameter Water Monitors |
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The U.S. EPA’s Technology Testing and Evaluation Program has been charged by EPA to evaluate the performance of commercially available water security-related technologies. Multi-p...
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Insight into molecular mechanisms of ultrafine carbon particle induced cardiovascular impairments in spontaneously hypertensive rats. |
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Rationale: Exposure to ambient particulate matter is a risk factor for cardiopulmonary disease as identified in several epidemiological studies. Radio telemetric analysis detected ...
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Interactions of Changing Solar Ultraviolet Radiation and Climate with Light Induced Chemical Reactions in Aquatic Environments |
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Changes in the ozone layer over the past two decades have resulted in increases in solar ultraviolet radiation that reach the surface of North American aquatic environments. Concur...
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Interannual Variation in Stable Carbon and Nitrogen Isotope Biogeochemistry of the Mattaponi River, Virginia |
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This manuscript addresses the difficult issue of identifying the origin of particulate organic matter (POM) in estuaries . . . The objectives of this study were to quantify spatial...
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Investigation of In-situ Biogeochemical Reduction of Chlorinated Solvents in Groundwater by Reduced Iron Minerals |
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Biogeochemical transformation is a process in which chlorinated solvents are degraded abiotically by reactive minerals formed by, at least in part or indirectly from, anaerobic bio...
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JUNE-SEPTEMBER, 6-9 AM, AMBIENT AIR BENZENE CONCENTRATIONS IN 39 U.S. CITIES, 1984-1986 |
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Ambient air samples from 44 sites in 39 U.S. urban areas were collected in electropolished, stainless steel canisters on week days from 6 to 9 am during June through September of 1...
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KEY PARAMETERS FOR DE NOVO FORMATION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS |
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De novo formation of polychlorinated- dibenzo-p-dioxins and dibenzofurans (PCDDs and PCDFs) was investigated in an Entrained Flow Reactor (EFR) to simulate combustion conditions. T...
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KINETIC CONTROL OF OXIDATION STATE AT THERMODYNAMICALLY BUFFERED POTENTIALS IN SUBSURFACE WATERS |
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Dissolved oxygen (DO) and organic carbon (Corg) are among the highest- and lowest-potential reactants, respectively, of redox couples in natural waters. When DO and Corg are prese...
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KINETICS OF ETHANOL BIODEGRADATION UNDER METHANOGENIC CONDITIONS IN GASOLINE SPILLS |
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Ethanol is commonly used as a fuel oxygenate. A concern has been raised that biodegradation of ethanol from a spill of gasoline may inhibit the natural biodegradation of fuel hydr...
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KINETICS OF GROWTH AND ETHANOL PRODUCTION ON DIFFERENT CARBON SUBSTRATES USING GENETICALLY ENGINEERED XYLOSE-FERMENTING YEAST |
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Saccharomyces cerevisiae 424A (LNH-ST) strain was used for fermentation of glucose and xylose. Growth kinetics and ethanol productivity were calculated for batch fermentat...
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KINETICS OF REDUCTION OF NITROBENZENE AND CARBON TETRACHLORIDE AT AN IRON-OXIDE COATED GOLD ELECTRODE. (R827117) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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KINETICS OF STYRENE HYDROFORMYLATION IN SUPERCRITICAL CARBON DIOXIDE - USING A RHODIUM-BASED CATALYST WITH FLUORINATED LIGANDS. (R826694C640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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KINETICS OF THE TRANSFORMATION OF TRICHLOROETHYLENE AND TETRACHLOROETHYLENE BY IRON SULFIDE. (R825958) |
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The transformation of nine halogenated aliphatic compounds
by 10 g/L (0.5 m2/L) FeS at pH 8.3 was studied in batch
experiments. These compounds were as follows:...
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KSCS FOR A PAH AND PCB ASSOCIATED WITH A MARINE SEDIMENT AMENDED WITH SEVERAL TYPES OF SOOT CARBON |
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Soot carbon (SC) originates from the combustion of fossil fuels and biomass and is found in sediments around the world. SC comprises up to 30% of organic carbon in sediment and ...
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Kinetic Modeling of Polychlorinated Dibenzo-p-dioxin and Dibenzofuran Formation Based on Carbon Degradation Reactions |
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Combustion experiments in a laboratory-scale fixed bed reactor were performed to determine the role of temperature and time in PCDD/F formation allowing a global kinetic expression...
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LABORATORY AND FIELD EVALUATIONS OF METHODOLOGY FOR MEASURING EMISSIONS OF CHLORINATED SOLVENTS FROM STATIONARY SOURCES |
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An evaluation of the use of EPA Method 18 for sampling and analysis of chlorinated solvents was needed to support possible future regulations by the U.S. Environmental Protection A...
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LABORATORY EVALUATION OF COMMERCIALLY AVAILABLE PASSIVE ORGANIC PERSONAL MONITORS |
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A laboratory investigation was conducted to determine the potential utility and limitations for the use of commercially available passive dosimeters for monitoring volatile organic...
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LABORATORY EVALUATION OF NONMETHANE ORGANIC CARBON DETERMINATION IN AMBIENT AIR BY CRYOGENIC RECONCENTRATION ANDFLAME IONIZATION DETECTION |
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The results of this study demonstrate the feasibility of a technique for analyzing samples of ambient air for gaseous non methane organic compounds (NMOC) using a cryogenic trap to...
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LABORATORY EVALUATION OF SIX NEW/MODIFIED PORTABLE X-RAY FLUORESCENCE SPECTROMETERS FOR THE MEASUREMENT OF LEAD IN CHARACTERIZED PAINT FILMS AND RESEARCH MATERIAL BOARDS (APPENDICES) |
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A laboratory study was performed in 1994-1995 to identify and estimate the influence of key characteristics for evaluating the performance of portable X-ray fluorescence (XRF) sp...
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LABORATORY EVALUATION OF SIX NEW/MODIFIED PORTABLE X-RAY FLUORESCENCE SPECTROMETERS FOR THE MEASUREMENT OF LEAD IN CHARACTERIZED PAINT FILMS AND RESEARCH MATERIAL BOARDS (TECHNICAL REPORT) |
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A laboratory study was performed in 1994-1995 to identify and estimate the influence of key characteristics for evaluating the performance of portable X-ray fluorescence (XRF) sp...
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LABORATORY STUDIES OF PRIORITY POLLUTANT TREATABILITY |
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This study investigated several methods currently available to reduce the level of pollutants in an industrial plant wastewater stream. Its purpose was to screen these treatment pr...
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LABORATORY TECHNIQUE FOR MEASUREMENT OF PH FOR CORROSION CONTROL AND WATER NOT IN EQUILIBRIUM WITH THE ATMOSPHERE |
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Factors governing pH changes that samples taken from systems closed to the atmosphere (pipe corrosion loops, distribution mains, household plumbing, ground and hypolimnotic waters)...
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LACK OF EFFECT OF LOW LEVELS OF CARBOXYHEMOGLOBIN ON CARDIOVASCULAR FUNCTION IN PATIENTS WITH ISCHEMIC HEART DISEASE (JOURNAL VERSION) |
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Thirty patients 38-75 years of age who had ischemic heart disease were studied to assess the effect of acute elevation of carboxyhemoglobin (COHb) concentration. After an initial f...
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LACK OF EFFECTS OF CARBON MONOXIDE ON HUMAN VIGILANCE |
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Previous publications on the effects of low levels of carbon monoxide (CO) on human vigilance performance have found conflicting results. While several studies have found statistic...
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LAKE ONTARIO BENTHOS: DISTURBANCE IN THE SYSTEM |
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Benthic invertebrates play a critical role in the Lake Ontario ecosystem including carbon transfer up the food chain and cycling of nutrients between the sediments and water....
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LAKE SUPERIOR ORGANIC CARBON BUDGET |
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The organic carbon concentration of Lake Superior is discussed in terms of a simple mathematical model that treats the lake as a well mixed basin. Major sources, outflows, and bioc...
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LAND-USE CHANGE AND CARBON FLUX BETWEEN 1970S AND 1990S IN CENTRAL HIGHLANDS OF CHIAPAS, MEXICO |
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We present results of a study in an intensively impacted and highly fragmented landscape in which we apply field-measured carbon (C) density values to land-use/land-cover (LU/LC) s...
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LANDFILL GAS EMISSIONS MODEL (LANDGEM) VERSION 3.02 USER'S GUIDE |
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The Landfill Gas Emissions Model (LandGEM) is an automated estimation tool with a Microsoft Excel interface that can be used to estimate emission rates for total landfill gas, meth...
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LANDFILL LEACHATE EFFECTS ON SORPTION OF ORGANIC MICROPOLLUTANTS ONTO AQUIFER MATERIALS |
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The effect of dissolved organic carbon as present in landfill leachate, on the sorption of organic micropollutants in aquifer materials was studied by laboratory batch and column e...
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LANDFILL LEACHATE EFFECTS ON TRANSPORT OF ORGANICS IN AQUIFER MATERIALS |
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The effect of dissolved organic carbon (DOC) in landfill leachate on the transport of a hydrophobic organic compound through saturated aquifer material was investigated. Leachate D...
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LANDSCAPE ATTRIBUTES, DISSOLVED ORGANIC CARBON, AND METAL ACCUMULATION IN AQUATIC MACROINVERTEBRATES (ARKANSAS RIVER BASIN, COLORADO). (R829640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LANDSCAPE STRUCTURE AND ESTUARINE CONDITION IN THE MID-ATLANTIC REGION OF THE UNITED STATES: I. DEVELOPING QUANTITATIVE RELATIONSHIPS |
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In a previously published study, quantitative relationships were developed between landscape metrics and sediment contamination for 25 small estuarine systems within Chesapeake Bay...
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LATITUDINAL AND SEASONAL VARIATION IN CALCULATED ULTRAVIOLET-B IRRADIANCE IN THE RICE-GROWING REGIONS OF ASIA |
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Ultraviolet-B (UV-B, 280-329 nm) irradiance was calculated for more than 1200 sites in Asia to characterize the spatial and temporal variation in the present UV-B climate for rice-...
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LEACHATE CHARACTERIZATION AND SYNTHETIC LEACHATE FORMULATION FOR LINER TESTING |
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A U.S. study was conducted to characterize leachates from hazardous waste land disposal sites and to assess the feasibility of formulating a multicompound synthetic leachate for li...
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LEAF AREA INDEX (LAI) CHANGES DETECTION OF UNDERSTORY VEGETATION IN THE ALBEMARLE-PAMLICO BASIN IKONOS AND LANDSAT ETM+ SATELLITE DATA |
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The advent of remotely sensed data from satellite platforms has enabled the research community to examine vegetative spatial distributions over regional and global scales. This ass...
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LEAF AREA INDEX CHANGE DETECTION OF UNDERSTORY VEGETATION IN THE ALBEMARLE-PAMLICO BASIN USING IKOMOS AND LANDSAT ETM+ SATELLITE DATA |
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The advent of remotely sensed data from satellite platforms has enabled the research community to examine vegetative spatial distributions over regional and global scales. This ass...
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LIFE CYCLE ASSESSMENT (LCA) AS A FRAMEWORK FOR ADDRESSING THE SUSTAINABILITY OF CONCENTRATED ANIMAL FEEDING OPERATIONS (CAFOS) |
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The challenges Concentrated Animal Feeding Operations (CAFOs) directly pose to sustainability include their impact on human health, receiving water bodies, groundwater, and air qua...
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LIFE CYCLE ASSESSMENT OF ELECTRICITY GENERATION ALTERNATIVES |
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This presentation summarizes various electricity and electricity/steam cogeneration alternatives. Among these alternatives, are fossil fuel and biomass power generation plants. T...
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LIFE-CYCLE EVALUATION OF GREENHOUSE GAS EMISSIONS FROM MUNICIPAL SOLID WASTE MANAGEMENT IN THE UNITED STATES |
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The paper discusses a life-cycle evaluation of greenhouse gas (GHG) emissions from municipal soild waste (MSW) management in the U.S. (NOTE: Using integrated waste management, recy...
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LIFETIME AND TEMPORAL OCCURRENCE OF ECTOMYCORRHIZAE ON PONDEROSA PINE (PINUS PONDEROSA LAWS.) SEEDLINGS GROWN UNDER VARIED ATMOSPHERIC CO-2 AND NITROGEN LEVELS |
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Climate change(elevated atmospheric CO-2,and altered air temperatures,precipitation amounts and seasonal patterns)may affect ecosystem processes by altering carbon allocation in pl...
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LIFETIME OF EXCESS ATMOSPHERIC CARBON DIOXIDE |
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We explore the effects of a changing terrestrial biosphere on the atmospheric residende time of carbon dioxide using three simple ocean carbon cycling models and a model of global ...
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LIGHT SCATTERING STUDY OF DIBLOCK COPOLYMERS IN SUPERCRITICAL CARBON DIOXIDE CO2 DENSITY-INDUCED MICELLIZATION TRANSITION. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LIGHT UTILIZATION AND PHOTOINHIBITION OF PHOTOSYNTHESIS IN MARINE PHYTOPLANKTON |
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Based on the record of the oldest identifiable fossils, the first oxygenic photosynthetic organisms appeared about 2 x 10 9 years ago in the form of marine single-celled, planktoni...
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LIGHT-INDUCED TRANSFORMATIONS OF METHOXYCHLOR IN AQUATIC SYSTEMS |
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The light-induced decomposition of methoxychlor was studied in hexane, distilled water, and several natural water samples. Product studies indicate that the primary photochemical p...
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LINERS OF NATURAL POROUS MATERIALS TO MINIMIZE POLLUTANT MIGRATION |
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When landfills are not completely impermeable then underlying groundwater may be contaminated by leachate constituents if these are not adequately retained by soils. Research on in...
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LINKAGE BETWEEN CLIMATE CHANGE AND STRATOSPHERIC OZONE DEPLETION |
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Two primary areas link the issue of stratospheric ozone depletion to global climate change: atmospheric processes and ecological processes. tmospheric processes establish a linkage...
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LINKING AIR TOXIC CONCENTRATIONS FROM CMAQ TO THE HAPEM5 EXPOSURE MODEL AT NEIGHORHOOD SCALES FOR THE PHILADELPHIA AREA |
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This paper provides a preliminary demonstration of the EPA neighborhood scale modeling paradigm for air toxics by linking concentration from the Community Multi-scale Air Quality (...
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LIPIDOMICS: A POSSIBLE TOOL FOR THE BIO-MONITORING OF SPECIFIC AIR POLLUTANTS |
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Lipidomics examines comprehensive lipid changes in biological systems (whole organisms or individual cells) as biomarkers of effect. Lipidomics is part of the larger field of meta...
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LIQUID-SOLID DISK EXTRACTION FOLLOWED BY SFE AND GC-ION-TRAP MS FOR THE DETERMINATION OF TRACE ORGANIC POLLUTANTS IN WATER |
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The U.S. Environmental Protection Agency's (EPA) Industrial Toxic 33-50 Program, which is part of the Pollution Prevention Act of 1990, outlines a plan to reduce the use of some co...
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LITERATURE REVIEW AND SURVEY OF EMISSIONS FROM RESIDENTIAL WOOD COMBUSTION AND THEIR IMPACT |
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The report gives results of a literature search of 53 reports covering woodstove design, operating conditions, emissions, testing methods, and ambient air impacts. The woodstoves s...
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LOGAN WASH FIELD TREATABILITY STUDIES OF WASTEWATERS FROM OIL SHALE RETORTING PROCESSES |
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Treatability studies were conducted on retort water and gas condensate wastewater from modified in-situ oil shale retorts to evaluate the effectiveness of selected treatment techno...
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LONG-TERM PERFORMANCE OF PERMEABLE REACTIVE BARRIERS USING ZERO-VALENT IRON: GEOCHEMICAL AND MICROBIOLOGICAL EFFECTS |
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Geochemical and microbiological factors that control long-term performance of subsurface permeable reactive barriers were evaluated at the Elizabeth City, NC and the Denver Federal...
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LONG-TERM RECOVERY OF PCB-CONTAMINATED SEDIMENTS AT THE LAKE HARTWELL SUPERFUND SITE: PCB DECHLORINATION. 1. END-MEMBER CHARACTERIZATION |
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Under anaerobic conditions, such as those typically found in buried sediments, the primary metabolic pathway for polychlorinated biphenyls (PCBs) is reductive dechlorination in whi...
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LONG-TERM RECOVERY OF PCB-CONTAMINATED SURFACE SEDIMENTS AT THE SANGAMO-WESTON/TWELVEMILE CREEK/LAKE HARTWELL SUPERFUND SITE |
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Natural recovery of contaminated sediments relies on burial of contaminated sediments with increasingly clean sediments over time (i.e., natural capping). Natural capping reduces t...
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LONGITUDINAL AND LATERAL PATTERNS IN PHYSICAL AND CHEMICAL ATTRIBUTES OF WILLAMETTE RIVERINE HABITAT |
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The Willamette River in western Oregon is the tenth largest river in the conterminous U. S. Plans are being developed to restore ecological function to the main corridor of the ri...
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LOVES CREEK ANAEROBIC, UPFLOW (ANFLOW) PILOT PLANT: PERFORMANCE SUMMARY |
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Anaerobic filter technology for municipal wastewater treatment has been studied in Knoxville, Tennessee with a 190-m exp 3 /d facility from August 1981 to October 1983. The ORNL pr...
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LOW-LEVEL CARBON MONOXIDE EXPOSURE AND WORK CAPACITY AT 1600 METERS |
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At sea level, low-level carbon monoxide (CO) exposure impairs exercise performance. To determine if altitude residence at 1600 m augments this CO effect, two studies of graded trea...
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LOW-NOX BURNERS FOR PULVERIZED-COAL-FIRED BOILERS IN JAPAN |
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The paper describes nitrogen oxide (NOx) abatement by low-NOx burners (LNBs) and combustion modification (CM) for dry-bottom pulverized-coal-fired boilers in Japan. LNBs have been ...
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LOWER RIO GRANDE VALLEY TRANSBOUNDARY AIR POLLUTION PROJECT (TAPP) (MAIN REPORT) |
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The purpose of the Lower Rio Grande Valley Transboundary Air Pollution Project (TAPP) was to obtain air quality data for a full year at three border monitoring sites to assess an...
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LP/LIF STUDY OF THE FORMATION AND CONSUMPTION OF MERCURY (I) CHLORIDE: KINETICS OF MERCURY CHLORINATION |
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The laser photolysis/laser induced flourescence (LP/LIF) technique has been applied to studies of gas-phase mercury (Hg) chlorination. Mercury (I) chloride (HgCl) has been detected...
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Light-Induced Decomposition of Surface Litter from the Cerrado in Central Brazil |
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It is well-established that light-induced decomposition can accelerate the decomposition of the organic matter in aquatic environments. In this study, using the production of carbo...
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MACROMOLECULAR ADDUCTION BY TRICHLOROACETONITRILE IN THE FISCHER 344 RAT FOLLOWING ORAL GAVAGE |
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Male Fischer 344 rats were administered 1- or 2-[14C]-trichloroacetonitrile (TCAN) by ral gavage. NA was isolated from the liver, kidneys and stomach and several protein fractions ...
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MACROMOLECULAR ADSORPTION BY ACTIVATED CARBONS AND CARBON FIBERS. (R826694C636) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MACROMOLECULAR TRANSPORT OF HYDROPHOBIC CONTAMINANTS IN AQUEOUS ENVIRONMENTS |
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The mobility of a model macromolecule, blue dextran, was compared under laboratory conditions to the mobility of tritiated water through a sandy soil. The blue dextran eluted from ...
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MAGNESIUM-MEDIATED CARBON-CARBON BOND FORMATIONS IN AQUEOUS MEDIA: BARBIER-GRIGNARD ALLYLATION AND PINACOL COUPLING OF ALDEHYDES. (R822668) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MAJOR ION CHEMISTRY OF LAKES ON THE KENAI PENINSULA, ALASKA |
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A probability sample of 59 lakes was conducted in August, 1988 to characterize the major ion chemistry of a population of over 800 lakes on the Kenai Peninsula, AK. here were two g...
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MANGANESE-MEDIATED CARBON-CARBON BOND FORMATION IN AQUEOUS MEDIA: CHEMOSELECTIVE ALLYLATION AND PINACOL COUPLING OF ARYL ALDEHYDES. (R822668) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MANUAL FOR THE CONTROL OF HAZARDOUS MATERIAL SPILLS. VOLUME 1: SPILL ASSESSMENT AND WATER TREATMENT TECHNIQUES |
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A manual for control of hazardous material spills using improvised treatment systems was developed under this contract. Spill control techniques have been emphasized, although a br...
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MARINE AEROSOLS ALTER SOIL PROCESSES IN COASTAL FORESTS |
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Most models of watershed biogeochemistry include the movement of materials from land to rivers and eventually the ocean. Few conceptual views, however, acknowledge the influence o...
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MASS AND COMPOSITION OF AN URBAN AEROSOL AS A FUNCTION OF PARTICLE SIZE FOR SEVERAL VISIBILITY LEVELS |
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An atmospheric aerosol sampling analysis experiment at a site near the center of the New York metropolitan area was carried out to delineate relationships existing between degree o...
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MASS SPECTROMETRIC QUANTIFICATION OF POLYCHLORINATED BIPHENYL CONGENERS USING MULTIPLE CARBON-13 INTERNAL STANDARDS |
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Multiple carbon-13 internal standards improve the precision and accuracy of the mass spectrometric analysis of polychlorinatedbiphenyl (PCB) congeners compared to analyses using a ...
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MATERNAL AGE EFFECT: THE ENIGMA OF DOWN SYNDROME AND OTHER TRISOMIC CONDITIONS |
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Aneuploidy is the most frequently observed chromosome abnormality in human liveborn, abortuses, and oocytes. he only etiological factor that has been established is advanced matern...
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MATHEMATICAL MODEL FOR METHANE PRODUCTION FROM LANDFILL BIOREACTOR - A DISCUSSION PAPER HTTP://OIPS.AIP.ORG/EEO/ |
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This discussion explains the experimental results of a landfill bioreactor (LFBR) from a microbiological perspective and provides a feasible strategy to evaluate methane production...
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MATHEMATICAL MODELING OF SIMULATED PHOTOCHEMICAL SMOG |
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This report deals with the continuing effort to develop a chemical kinetic mechanism to describe the formation of photochemical smog. Using the technique of computer modeling to si...
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MATHEMATICAL MODELS OF WATER QUALITY IN LARGE LAKES. PART 2. LAKE ERIE |
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This research was undertaken to develop and apply a mathematical model of the water quality in large lakes, particularly Lake Huron and Saginaw Bay (Part 1) and Lake Erie (Part 2)....
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MAXIMUM UTILIZATION OF WATER RESOURCES IN A PLANNED COMMUNITY |
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An ecologically planned community (The Woodlands, Texas) has adopted a unique water management plan designed to avoid adverse water quality and hydrological effects due to urbaniza...
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MAXIMUM UTILIZATION OF WATER RESOURCES IN A PLANNED COMMUNITY. STORMWATER RUNOFF QUALITY: DATA COLLECTION, REDUCTION AND ANALYSIS |
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Stormwater from four watersheds in the Houston area was monitored over a three year period. Land use in the watershed included undeveloped forest, developing forest, fully-develope...
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MEADOWLAND NATURAL TREATMENT PROCESSES IN THE LAKE TAHOE BASIN: A FIELD INVESTIGATION |
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The report investigates the effectiveness of using natural meadowlands and wetlands to trap nutrients and sediments on land from surface and storm water runoff before they reach La...
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MEASUREMENT OF CARDIOPULMONARY FUNCTION BY REBREATHING METHODOLOGY IN PIGLETS |
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The use of a multiple gas rebreathing method for the measurement of cardiopulmonary function in mechanically ventilated neonates was evaluated. The following indices of cardiopulmo...
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MEASUREMENT OF EXHALED BREATH AND VENOUS BLOOD TO DEVELOP A PHYSIOLOGICALLY BASED PHARMACOKINETIC MODEL FOR HUMAN EXPOSURE TO METHYL TERTIARY-BUTYL ETHER AND THE PRODUCTION OF THE BIOMARKER TERTIARY-BUTYL ALCOHOL |
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Methyl tertiary-butyl ether (MTBE) is a common fuel additive used to increase the availability of oxygen in gasoline to reduce winter-time carbon monoxide emissions from automobi...
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MEASUREMENT OF FINE PARTICULATE MATTER (NONVOLATILE AND SEMIVOLATILE FRACTIONS) IN FRESNO, CA |
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Semi-volatile material, including ammonium nitrate and semi-volatile organic material, is often not measured by traditionally used sampling methods including the FRM and the R&P ...
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MEASUREMENT OF LIGHT ABSORPTION EXTINCTION IN DENVER |
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Simultaneous measurements of bext (teleradiometer), b(sup sp) (integrating nephelometer) and b(sup ag) (N02 monitor) were used to obtain particle absorption extinction coefficients...
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MEASUREMENT OF LIGHT HYDROCARBONS AND OXIDANT TRANSPORT, HOUSTON AREA 1976 |
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An extensive air pollutant monitoring program, including ground level and aerial sampling, was carried out in the Houston area during the month of July 1976. Measurements included ...
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MEASUREMENT OF SULFUR AND CARBON SPECIES EMISSIONS FROM OIL-FIRED COMMERCIAL AND INSTITUTIONAL BOILERS |
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This research program was to provide source emission data for urban particulate models. The objectives were twofold: to determine emission factors for primary sulfate and carbon fr...
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MEASUREMENT OF VOLATILE CHEMICAL EMISSIONS FROM WASTEWATER BASINS |
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The objective of this project was to measure the rate at which selected volatile organic carbon (VOC) compounds are being emitted to air from waste-water treatment basins of the pu...
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MEASUREMENT OF VOLATILE ORGANIC COMPOUNDS IN EXHALED BREATH AS COLLECTED IN EVACUATED ELECTROPOLISHED CANISTERS |
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A set of three complementary analytical methods were developed specifically for exhaled breath as collected in evacuated stainless steel canisters using gas chromatography - mass s...
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MEASUREMENTS OF AMMONIA (NH3) AND CARBON DIOXIDE (CO2) WITH DISTRIBUTED FEEDBACK (DFB) LASERS NEAR MICROMETERS IN BIOREACTOR VENT GASES. (R827123) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MEASURING HUMAN EXPOSURE TO CARBON MONOXIDE IN WASHINGTON, DC., AND DENVER, COLORADO, DURING THE WINTER OF 1982-1983 |
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In the past, no scientifically valid approach for determining the exposures of an urban population to a pollutant was available. Recently, EPA successfully field tested two separat...
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MEASURING METAL SULFIDE COMPLEXES IN OXIC RIVER WATERS WITH SQUARE WAVE VOLTAMMETRY. (R825395) |
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A sulfide identification protocol was developed to quantify specific metal
sulfides that could exist in river water. Using a series of acid additions,
nitrogen purges, a...
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MECHANISM AND KINETICS OF THE FORMATION OF NOX AND OTHER COMBUSTION POLLUTANTS. PHASE I. UNMODIFIED COMBUSTION |
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The report gives Phase I results of an investigation of the mechanisms and kinetics of the formation of NOx and other combustion pollutants. It gives results of experimental invest...
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MECHANISM AND KINETICS OF THE FORMATION OF NOX AND OTHER COMBUSTION POLLUTANTS. PHASE II. MODIFIED COMBUSTION |
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The report gives Phase II results of a combined experimental/theoretical study to define the mechanisms and kinetics of the formation of NOx and other combustion pollutants. Two ex...
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MECHANISMS OF HEAVY METAL REMOVAL FROM ACID MINE DRAINAGE USING CHITIN |
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Acid Mine Drainage (AMD) emanating from inactive or active mine sites contains elevated levels of toxic heavy metals, which can have an adverse impact to the surrounding environmen...
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MECHANISMS OF NANODIAMOND PARTICLE INDUCED IL-8 EXPRESSION IN HUMAN AIRWAY EPITHELIAL CELLS |
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Nanodiamond particles (NDP) prepared by detonation under confined conditions have a number of industrial and analytical applications. Previous in vitro studies have reported NDP to...
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MEETING AT RTP, NC - COMPARATIVE CYTOTOXICITY OF TRIHALOMETHANES (THMs) AND TRIHALONITROMETHANES (THNMs) IN CULTURED NORMAL HUMAN COLON CELLS |
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Epidemiological studies have linked the consumption of chlorinated surface waters to an increased risk of colorectal cancer. The THMs [trichloromethane, TCM, bromo'dichloromethane,...
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MEETING IN ATLANTA, GA - COMPARATIVE CYTOTOXICITY OF TRIHALOMETHANES (THMs) AND TRIHALONITROMETHANES (THNMs) IN CULTURED NORMAL HUMAN COLON CELLS |
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Epidemiological studies have linked the consumption of chlorinated surface waters to an increased risk of colorectal cancer. The THMs [trichloromethane, TCM, bromodichloromethane, ...
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MEETING IN CHARLOTTE: METHODS FOR THE ANALYSIS OF PRIORITY DBPS IN RO-CONCENTRATED DRINKING WATER |
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The ability to understand mechanisms of formation and occurrence of disinfection by-products (DBPs) resulting from treatment of natural waters has been limited to those formed at u...
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MEETING IN CHARLOTTE: SOLID-PHASE EXTRACTION OF 35 DBPS WITH ANALYSIS BY GC/ECD AND GC/MS |
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An analytical method for 35 disinfection by-products (DBPs) was developed for a U.S. Environmental Protection Agency health effects study. A toxicological evaluation was conducted...
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MEMBRANE-MEDIATED EXTRACTION AND BIODEGRADATION OF VOCS FROM AIR |
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The paper discusses a project designed to evaluate the feasibility of using a membrane-supported extraction and biotreatment process to meet the National Emissions Standard for Haz...
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MERCURIC CHLORIDE CAPTURE BY ALKALINE SORBENTS |
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The paper gives results of bench-scale mechanistic studies of mercury/sorbent reactions that showed that mercuric chloride (HgC12) is readily adsorbed by alkaline sorbents, which m...
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MERCURY AND STABLE ISOTPOES OF CARBON AND NITROGEN IN MINK |
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The total mercury concentrations, δ15N and δ13C in tissues of mink (Mustela vison) captured in Rhode Island during winters of the years 1999-2004 showed samples to be statisticall...
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MERCURY BINDING CONSTANTS FOR DISSOLVED ORGANIC CARBON ISOLATES FROM THE FLORIDA EVERGLADES. (R827631) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MERCURY CAPTURE ON COAL COMBUSTION FLY ASH. (R827649) |
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A study was performed at the Energy and Environmental Research Center (EERC) to test the hypotheses that (1) different carbon types contained in coal combustion fly ash have var...
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MERCURY IN MINK IN RHODE ISLAND |
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Tissues of mink (Mustela vison) collected from Rhode Island sites during winters of 1999-2002 were analyzed for mercury and stable isotopes of nitrogen and carbon to determine the ...
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META-ANALYSIS OF NITROGEN REMOVAL IN RIPARIAN BUFFERS |
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Riparian buffer zones, the vegetated region adjacent to streams and wetlands, are thought to be effective at intercepting and controlling nitrogen loads entering water bodies. Rip...
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METABOLISM OF 2-METHYLNAPHTHALENE TO ISOMERIC DIHYDRODIOLS BY HEPATIC MICROSOMES OF RAT AND RAINBOW TROUT |
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The metabolism of 2-methylnaphthalene in rats (in vivo and in vitro) and rainbow trout (in vitro) has been investigated. Three isomeric dihydrodiols were formed by microsomal prepa...
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METABOLISM OF CARBAMATE INSECTICIDES |
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The results of studies conducted to determine the metabolic fate of carbamate insecticides and its toxicological significance are presented. Methomyl metabolism in rats was investi...
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METABOLISM OF CHLORINATED METHANES, ETHANES, AND ETHYLENES BY A MIXED BACTERIAL CULTURE GROWING ON METHANE |
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Soil was taken from the top 10 cm of a soil column that removed halogenated aliphatic hydrocarbons in the presence of natural gas. This soil was used as an enrichment inoculum to d...
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METAL-COLLOID PARTITIONING IN ARTIFICIAL INTERSTITIAL WATERS OF MARINE SEDIMENTS: INFLUENCES OF SALINITY, PH AND COLLOIDAL ORGANIC CARBON CONCENTRATION |
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For decades, heavy metals have been deposited into marine sediments as a result of anthropogenic activities. Depending on their bioavailability, these metals may represent a risk t...
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METAL-ENHANCED ABIOTIC DEGRADATION OF VOCS |
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EnviroMetal Technologies, Inc. (ETI) of Canada has developed the metal-enhanced abiotic degradation technology to treat halogenated volatile organic compounds (VOCS) in water. he E...
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METALLOCOENZYME-MEDIATED REDUCTIVE TRANSFORMATION OF CARBON TETRACHLORIDE IN TITANIUM(III) CITRATE AQUEOUS SOLUTION. (R825689C054,R825689C060) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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METEOROLOGICAL FACTORS RESPONSIBLE FOR HIGH CO (CARBON MONOXIDE) LEVELS IN ALASKAN CITIES |
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High winter carbon monoxide levels in Anchorage, as in Fairbanks, are due to intense nocturnal (ground-based) inversions persisting through the periods of maximum emissions and at ...
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METHANE STEAM REACTION OVER NICKEL CATALYSTS IN THE HYNOL PROCESS |
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The report discusses the reaction of methane-steam over nickel catalysts in the Hynol process, a process that uses biomass and natural gas as feedstocks to maximize methanol yields...
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METHANOL AS A CARBON SOURCE FOR BIOREMEDIATION OF ACID MINE DRAINAGE. (R825289) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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METHANOL POTENTIATION OF CARBON TETRACHLORIDE HEPATOTOXICITY: THE CENTRAL ROLE OF CYTOCHROME P450 |
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NO ABSTRACT PROVIDED...
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METHOD 25 - DETERMINATION OF TOTAL GASEOUS NON-METHANE ORGANIC EMISSIONS AS CARBON FROM STATIONARY SOURCES |
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Section 3.17 describes the procedures and specifications for determining volatile organic compounds as total gaseous non-methane organics from stationary sources. n emission sample...
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METHOD 415.3 - MEASUREMENT OF TOTAL ORGANIC CARBON, DISSOLVED ORGANIC CARBON AND SPECIFIC UV ABSORBANCE AT 254 NM IN SOURCE WATER AND DRINKING WATER |
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2.0 SUMMARY OF METHOD
2.1 In both TOC and DOC determinations, organic carbon in the water sample is oxidized to form carbon dioxide (CO2), which is then measured by a detec...
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METHOD DEVELOPMENT FOR ALACHLOR ESA AND OTHER ACENTANILIDE HERBICIDE DEGRADATION PRODUCTS |
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Introduction: Acetanilide herbicides are frequently applied in the U.S. on crops (corn, soybeans, popcorn, etc.) to control broadleaf and annual weeds. The acetanilide and acetam...
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METHOD FOR DETERMINING GUT UPTAKE EFFICIENCIES OF HYDROPHOBIC POLLUTANTS IN A DEPOSIT-FEEDING CLAM |
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Deposit-feeding invertebrates select particles for ingestion that are richer in organic carbon, and thus higher in pollutant concentration, than the mean values of bedded sediment....
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METHOD FOR ESTIMATING FUGITIVE PARTICULATE EMISSIONS FROM HAZARDOUS WASTE SITES |
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Control techniques are reviewed for applicability to fugitive particulate emissions from hazardous waste sites. Techniques judged applicable include chemical stabilization (40 to 1...
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METHOD FOR MEASURING CARBON FIBER EMISSIONS FROM STATIONARY SOURCES |
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Carbon fibers are highly conductive, lightweight and of small dimensions. When released as emissions from production, manufacturing, processing and disposal sources they may become...
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METHOD FOR SEPARATING VOLATILE ORGANIC CARBON FROM 0.1 M3 OF AIR TO IDENTIFY SOURCES OF OZONE PRECURSORS VIA ISOTOPE (14C) MEASUREMENTS |
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Atmospheric non-methane volatile organic compounds (VOCS) are known to play an important role in urban ozone formation during the summer. o respond to the need for a direct measure...
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METHOD FOR THE SUPERCRITICAL FLUID EXTRACTION OF SOILS/SEDIMENTS |
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Supercritical fluid extraction has been publicized as an extraction method which has several advantages over conventional methods, and it is expected to result in substantial cost ...
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METHOD OF CHEMICAL ANALYSIS FOR OIL SHALE WASTES |
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Several methods of chemical analysis are described for oil shale wastewaters and retort gases. These methods are designed to support the field testing of various pollution control ...
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METHOD TO QUANTIFY THE CARBON CYCLE OF FOREST BIOMES IN THE FORMER SOVIET UNION (EQUILIBRIUM ANALYSIS) |
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Human activities have caused a measurable increase in the atmospheric concentration of CO2 which is predicted to cause the earth's temperatures to rise and accelerate rates of plan...
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METHODOLOGICAL APPROACH FOR MEASURING PRIORITY DBPS IN REVERSE OSMOSIS CONCENTRATED DRINKING WATER |
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Many disinfection by-products (DBPs) are formed when drinking water is chlorinated, but only a few are routinely measured or regulated. Various studies have revealed a plethora of ...
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METHODOLOGIES FOR QUANTIFYING POLLUTION PREVENTION BENEFITS FROM LANDFILL GAS CONTROL AND UTILIZATION |
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The report describes developing emission factors for controlled primary pollutants (e.g., nonmethane organic compounds) and secondary air pollutants (e.g., carbon monoxide). The re...
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METHODOLOGY FOR DESIGNING AIR QUALITY MONITORING NETWORKS: 2. APPLICATION TO LAS VEGAS, NEVADA, FOR CARBON MONOXIDE |
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An objective methodology presented in a companion paper (Liu et al., 1986) for determining the optimum number and disposition of ambient air quality stations in a monitoring networ...
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METHODOLOGY FOR DESIGNING AN OPTIMUM AIR QUALITY MONITORING NETWORK |
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A two-step objective method is presented for determining the optimum number and disposition of ambient air quality stations in a monitoring network. The method uses a data base con...
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METHODOLOGY FOR EVALUATING THE EFFECTIVENESS OF NONPOINT SOURCE POLLUTION ABATEMENT PROGRAMS |
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The Upper Big Walnut Creek watershed encompasses 190 square miles of predominantly agricultural cropland (65%) in Central Ohio (USA) where agronomic fertilizers and herbicides are ...
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METHODOLOGY TO APPORTION AMBIENT AIR MEASUREMENTS TO INVESTIGATE POTENTIAL SHORT-TERM RESPIRATORY EFFECTS NEAR WASTE INCINERATORS |
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Ambient air samples at four sites located near two incinerators (a biomedical waste and a municipal incinerator) in the vicinity of Charlotte, North Carolina were acquired as part ...
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METHODS FOR EMERGING CONTAMINANT GROUPS: EXPLOSIVES AND NITROSAMINES |
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Background
In support of requirements in the Safe Drinking Water Act, the National Exposure Research Laboratory (NERL), has been developing analytical methods for chemicals on t...
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METHODS FOR REMOVING URANIUM FROM DRINKING WATER (JOURNAL VERSION) |
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The number of water supplies with high uranium levels and the possibility of a national uranium regulation has stimulated greater interest in uranium removal technology. The paper ...
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METHODS FOR THE ANALYSIS OF PRIORITY DBPS IN RO-CONCENTRATED DRINKING WATER |
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The ability to understand mechanisms of formation and occurrence of disinfection by-products (DBPs) resulting from treatment of natural waters has been limited to those formed at &...
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METHODS FOR THE DETECTION OF CHANGES IN THE MICROBIAL ECOLOGY OF SOIL CAUSED BY THE INTRODUCTION OF MICROORGANISMS |
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Established methods for measuring a broad spectrum of microbial activities were evaluated for their ability to detect perturbations of the soil environment by introduced microorgan...
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METHODS FOR THE DETERMINATION OF CHEMICAL SUBSTANCES IN MARINE AND ESTUARINE ENVIRONMENTAL SAMPLES |
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This manual contains seven methods for the determination of nutrients, three metals, and chlorophyll a in marine and estuarine environmental matrices. wo of the metals methods are ...
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METHODS FOR THE DETERMINATION OF TOTAL ORGANIC CARBON (TOC) IN SOILS AND SEDIMENTS |
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Organic matter in soils and sediments is widely distributed over the earth's surface occurring in almost all terrestrial and aquatic environments (Schnitzer, 1978). Soils and sedim...
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METHODS OF REDUCING WATER CONTAMINANTS: REMOVAL OF ORGANIC COMPOUNDS |
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Much of the recent concern by regulatory agencies about drinking water quality has been directed toward organic contamination in drinking water. lthough organic contamination has b...
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METRICS OF PERFORMANCE FOR THE SABRE MICROCOSM STUDY |
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The SABRE (Source Area BioREmediation) project will evaluate accelerated anaerobic bioremediation of chlorinated solvents in areas of high concentration, such as DNAPL source areas...
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MICROBIAL ASPECTS OF WATER TREATMENT PROCESSES: A PROGRESS REPORT |
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Modifications in water treatment processes or in their sequential placement to optimize reductions in disinfection byproduct formation must be cautiously evaluated and monitored fo...
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MICROBIAL BIOFILMS AS INDICATORS OF ESTUARINE CONDITION |
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Microbial biofilms are complex communities of bacteria, protozoa, microalgae, and micrometazoa which exist in a polymer matrix on submerged surfaces. Their development is integrati...
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MICROBIAL CARBON DIOXIDE GENERATION AND OXYGEN UTILIZATION IN THE SUBSURFACE AT A GASOLINE SPILL SITE |
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Twenty years after an estimated spill of 36,000 gallons of aviation gasoline at an airport location a major portion still remains as oily phase residue just above the water table. ...
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MICROBIAL CHARACTERIZATION OF MANURE BASED PERMEABLE REACTIVE BARRIER |
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The implementation of permeable reactive barriers (PRB) provides a viable option for the remediation of contaminants of environmental significance such as dissolved metals (i.e., c...
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MICROBIAL COLONIZATION, RESPIRATION AND BREAKDOWN OF MAPLE LEAVES ALONG A STREAM-MARSH CONTINUUM |
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Breakdown rates, macroinvertebrate and bacterial colonization, and microbial respiration were measured on decaying maple leaves at three sites along a stream-marsh continuum. Brea...
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MICROBIAL COLONIZATION, RESPIRATION, AND BREAKDOWN OF MAPLE LEAVES ALONG A STREAM-MARSH CONTINUUM |
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Breakdown rates, macroinvertebrate and bacterial colonization, and microbial respiration were measured on decaying maple (Acer saccharum) leaves at three sites along a stream-marsh...
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MICROBIAL COMMUNITY DIVERSITY AND CARBON UTILIZATION IN ESTUARINE ECOSYSTEMS OF SOUTHEASTERN U.S.A. |
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Estuaries are very dynamic ecosystems with regard to the transport and transformation of organic matter. Detrital organic matter is abundant in most estuaries, however, the dynami...
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MICROBIAL DEGRADATION OF 2,4,5-T AND CHLORINATED DIOXINS |
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The report from the University of Illinois College of Medicine at Chicago covers three years of research under a Cooperative Agreement. A pure culture of Pseudomonas capacia strain...
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MICROBIAL DEGRADATION OF HALOGENATED HYDROCARBONS |
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Biochemical and soil microbiology studies indicate that numerous mechanisms exists for the dehalogenation of both aliphatic and aromatic hydrocarbons. Tests described in this paper...
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MICROBIAL DEGRADATION OF NITROGEN, OXYGEN, AND SULFUR HETEROCYCLIC COMPOUNDS UNDER ANAEROBIC CONDITIONS: STUDIES WITH AQUIFER SAMPLES |
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The potential for anaerobic biodegradation of 12 heterocyclic model compounds was studied. ine of the model compounds were biotransformed in aquifer slurries under sulfate-reducing...
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MICROBIAL DEGRADATION OF SYNTHETIC CHLORINATED COMPOUNDS: EVOLUTIONARY IMPLICATIONS |
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Environmental release of synthetic chlorinated compounds in the form of herbicides/pesticides, solvents, refrigerants, etc., has created major concerns with regard to their effects...
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MICROBIAL DEGRADATION OF TOLUENE UNDER SULFATE-REDUCING CONDITIONS AND THE INFLUENCE OF IRON ON THE PROCESS |
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Toluene degradation occurred concomitantly with sulfate reduction in anaerobic microcosms inoculated with contaminated subsurface soil from an aviation fuel storage facility near t...
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MICROBIAL ECOLOGY OF A SHALLOW UNCONFINED GROUND WATER AQUIFER POLLUTED BY MUNICIPAL LANDFILL LEACHATE |
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The microflora of a shallow anoxic aquifer underlying a municipal landfill In Oklahoma was characterized by direct light microscopy, most probable number of determinations of sulfa...
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MICROBIAL ENZYME ACTIVITY FOR CHARACTERIZING NUTRIENT LOADING TO GREAT LAKES COASTAL WETLANDS |
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Energy and material flows in aquatic ecosystems are mediated by microbial carbon and nutrient cycling. Extracellular enzymes produced by the microbial community aid in the degradat...
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MICROBIAL REDUCTIVE DECHLORINATION OF HEXACHLORO-1,3-BUTADIENE IN A METHANOGENIC ENRICHMENT CULTURE. (R825513C007) |
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Sequential reductive dechlorination of hexachloro-1,3-butadiene (HCBD) was achieved by a mixed, methanogenic culture enriched from a contaminated estuarine sediment. Both methan...
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MICROBIAL SOURCE TRACKING - WHERE ARE WE NOW AND WHERE ARE WE GOING? |
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Microbial Source Tracking ? Where Are We Now and Where Are We Going?
J. W. Santo-Domingo1, J. M. Simpson1, G. Scott2 and D. J. Reasoner1
1U.S. Environmental Protection Ag...
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MICROBIOLOGICAL ALTERATIONS IN DISTRIBUTED WATER TREATED WITH GRANULAR ACTIVATED CARBON |
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The goal of this project was to examine the effect of granular activated carbon (GAC) treatment on the microbiological characteristics of potable water in distribution systems. Dat...
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MICROBIOLOGY OF GRANULAR ACTIVATED CARBON HOME TREATMENT DEVICES |
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Consumer usage of point-of-use granular activated carbon filtration devices is increasing rapidly, yet there is little information available to the consumer concerning the efficacy...
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MICROCOSM STUDY OF ANAEROBIC BIODEGRADATION OF MTBE AND TBA |
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Ground water samples collected in at a gasoline spill sites in Orange County, California, suggested that MTBE was being transformed to TBA. In some of the most heavily contaminate...
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MICROCOSM STUDY OF DEGRADATION OF CHLORINATED SOLVENTS ON SYNTHETIC GREEN RUST MINERALS |
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Green rust minerals contain ferrous ion in their structure that can potentially serve as a chemical reductant for degradation of chlorinated solvents. Green rusts are found in zero...
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MICROWAVE IRRADIATION IN BENIGN SYNTHESIS OF HETEROCYCLES, NOBLE NANOMETALS AND NANOCOMPOSITES |
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A brief historic account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ ...
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MICROWAVE IRRADIATION IN BENIGN SYNTHESIS OF ORGANIC MOLECULES, NOBLE NANOMETALS AND NANOCOMPOSITES |
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A brief historic account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ ...
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MICROWAVE-ACCELERATED CARBON-NITROGEN BOND FORMATION: A GREEN CHEMICAL APPROACH FOR THE SYNTHESIS OF AMINES AND HETEROCYCLES IN AQUEOUS MEDIA |
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The concept of "green chemistry" is widely adopted to meet the fundamental scientific challenges of protecting the human health and environment while simultaneously achieving comme...
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MICROWAVE-ASSISTED CHEMISTRY: SYNTHESIS OF AMINES AND HETEROCYCLES VIA CARBON-NITROGEN BOND FORMATION IN AQUEOUS MEDIA |
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Improved C-N bond formation under MW influence is demonstrated by a) solventless three-component coupling reaction to generate propargyl amines that uses only Cu (I); b) aqueous N-...
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MICROWAVE-ASSISTED SYNTHESIS OF CROSSLINKED POLY(VINYL ALCOHOL) NANOCOMPOSITES COMPRISING SINGLE-WALLED CARBON NANOTUBES, MULTI-WALLED CARBON NANOTUBES AND BUCKMINSTERFULLERENE |
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We report a facile method to accomplish cross-linking reaction of poly (vinyl alcohol) (PVA) with single-wall carbon nanotubes (SWNT), multi-wall carbon nanotubes (MWNT), and Buckm...
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MICROWAVE-INDUCED RAPID CHEMICAL FUNCTIONALIZATION OF SINGLE-WALLED CARBON NANOTUBES (R830901) |
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Abstract
The microwave-induced chemical functionalization of single-walled carbon nanotubes (SWNTs) is reported. The major advantage of this high-energy proced...
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MIGRATION OF HAZARDOUS SUBSTANCES THROUGH SOIL |
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Factorlally designed column and batch leaching studies were conducted on samples of various Industrial wastes, flue gas desulfurlzatlon sludges, and coal fly ash to determine the ...
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MINEBANK RUN PROJECT AS AN APPROACH FOR RESTORING DEGRADED URBAN WATERSHEDS AND RIPARIAN ECOSYSTEMS |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. Minebank Run, an urban stream in Baltimore MD, will be restored in 2004/2005 using various t...
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MINERALIZATION OF A SORBED POLYCYCLIC AROMATIC HYDROCARBON IN TWO SOILS USING CATALYZED HYDROGEN PEROXIDE. (R826163) |
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Hydrogen peroxide (H2O2) catalyzed by soluble iron or naturally occurring soil minerals, (i.e., modified Fenton's reagent) was investigated as a basis for ...
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MINERALIZATION OF MTBE WITH VARIOUS PRIMARY SUBSTRATES |
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Five specialized bioreactors have been operated for over a year to evaluate the biodegradability of the fuel oxygenate methyl-t-butyl -t-butyl ether (MTBE) under difference subst...
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MINERALIZATION OF RECALCITRANT ENVIRONMENTAL POLLUTANTS BY A WHITE ROT FUNGUS |
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The white rot fungus Phanerochaete chrysosporium is able to degrade lignin, a structurally complex, naturally occurring and environmentally persistent, non-repeating heteropolyrner...
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MITIGATION POTENTIAL OF CARBON DIOXIDE EMISSIONS BY MANAGEMENT OF FORESTS IN ASIA |
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NO ABSTRACT PROVIDED...
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MNA TO ACHIEVE SITE OBJECTIVES: BACK TO BASICS |
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The U.S. EPA recognizes a three-tiered approach to evaluate site specific data in support of monitored natural attenuation (1) historical groundwater and/or soil chemistry data tha...
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MOBILE EMISSIONS CHARACTERIZATION TEAM (HANDOUT) |
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The handout describes the Mobile Emissions Characterization Team of EPA's Office of Research and Development, National Risk Management Research Laboratory, Air Pollution Prevention...
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MOBILE4 SENSITIVITY ANALYSIS |
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The report identifies the MOB1LE4 input variables that can have significant impacts on highway vehicle emissions inventories and gives priorities for the development of improved gu...
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MOBILE4 SENSITIVITY ANALYSIS |
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The report identifies the MOB1LE4 input variables that can have significant impacts on highway vehicle emissions inventories and gives priorities for the development of improved gu...
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MOBILIZATION AND DISTRIBUTION OF METALS FROM ESTUARINE SEDIMENTS DURING PERIODS OF SIMULATED RESUSPENSION |
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For decades, heavy metals have been deposited into marine sediments as a result of anthropogenic activities. Depending on their bioavailability, they may represent a risk to aquati...
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MOBILIZATION OF PAHS AND PCBS FROM IN-PLACE CONTAMINATED MARINE SEDIMENTS DURING SIMULATED RESUSPENSION EVENTS |
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A particle entrainment simulator was used to experimentally produce representative estuarine resuspension conditions to investigate the resulting transport of polychlorinated biphe...
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MODEL FOR MEASURING THE HEALTH IMPACT FROM CHANGING LEVELS OF AMBIENT AIR POLLUTION: MORBIDITY STUDY |
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The study quantitatively examines the relationship between human health and ambient air concentrations of the major pollutants in the city of Chicago. This report describes the mor...
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MODEL OF CARBON CYCLING IN PLANKTONIC FOOD WEBS |
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A mathematical model of carbon fluxes through the heterotrophic microbial food web is developed from a synthesis of laboratory and field research,The basis of the model is the segr...
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MODEL OF CARBON CYCLING IN THE PLANKTONIC FOOD WEB |
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A mathematical model of carbon fluxes through the heterotrophic microbial food web is developed from a synthesis of laboratory and field research. he basis of the model is the segr...
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MODEL OF SULFATE AEROSOL DYNAMICS IN ATMOSPHERIC PLUMES (JOURNAL VERSON) |
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The evolution of atmospheric aerosols is currently a subject of concern because of its relationship to environmental issues. Recently, a rigorous approach for modeling the dynamics...
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MODEL SIMULATION STUDIES OF SCALE-DEPENDENT GAIN IN STREAM NUTRIENT ASSIMILATIVE CAPACITY RESULTING FROM IMPROVING NUTRIENT RETENTION METRICS |
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Considering the difficulty in measuring restoration success for nonpoint source pollutants, nutrient assimilative capacity (NAS) offers an attractive systems-based metric. Here NAS...
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MODEL TO PREDICT CARBOXYHEMOGLOBIN AND PULMONARY PARAMETERS AFTEREXPOSURE TO O2, CO2, AND CO |
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A computer based physiological model of respiratory gas exchange, which considered variation in inhaled oxygen and carbon dioxide, was modified to include the effects of inhaled ca...
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MODELING AEROSOL FORMATION FROM ALPHA-PINENE + NOX IN THE PRESENCE OF NATURAL SUNLIGHT USING GAS PHASE KINETICS AND GAS-PARTICLE PARTITIONING THEORY. (R826771) |
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A kinetic mechanism was used to link and model the gas-phase reactions and
aerosol accumulation resulting from ![]()
src="/ncer/pubs/images/alpha.gif">-pinene re...
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MODELING AMBIENT CARBON MONOXIDE TRENDS TO EVALUATE MOBILE SOURCE EMISSIONS REDUCTIONS |
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Regression models have been used with poor success to detect the effect of emission control programs in ambient concentration measurements of carbon monoxide. n advanced CO regress...
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MODELING CARBON MONOXIDE (CO) EXPOSURES WITHIN MICROENVIRONMENTS GIVEN PERSONAL EXPOSURE MONITORING DATA |
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Data collected at ambient fixed sites may not adequately reflect personal CO exposures, as they most often miss exposures resulting from CO emissions from sources in the immediate ...
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MODELING COUPLING OF EEL GRASS ZOSTRA MARINA AND WATER FLOW |
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Ecological effects caused by submerged aquatic vegetation not only depend on the plants and their morphology but also on the flow and transport patterns of dissolved and suspende...
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MODELING DYNAMIC VEGETATION RESPONSE TO RAPID CLIMATE CHANGE USING BIOCLIMATIC CLASSIFICATION |
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Modeling potential global redistribution of terrestrial vegetation frequently is based on bioclimatic classifications which relate static regional vegetation zones (biomes) to a se...
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MODELING ENVIRONMENTAL TOBACCO SMOKE IN THE HOME USING TRANSFER FUNCTIONS |
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This paper presents the theoretical and practical development of a multi-compartment indoor air quality model designed for predicting pollutant concentrations from environmental to...
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MODELING FINE PARTICULATE MASS AND VISIBILITY USING THE EPA REGIONAL PARTICULATE MODEL |
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Particulate matter in the atmosphere can adversely impact air quality and human health, as well as significantly affect the environment. articles in the submicrometer size range, w...
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MODELING MERCURY CONTROL WITH POWDERED ACTIVATED CARBON |
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This abstract concerns the modeling of a mercury control using powdered activated carbon. The full paper is EIMS number 64020.
For a PDF copy of this abstract, send an email...
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MODELING MERCURY CONTROL WITH POWDERED ACTIVATED CARBON |
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The paper presents a mathematical model of total mercury removed from the flue gas at coal-fired plants equipped with powdered activated carbon (PAC) injection for Mercury control....
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MODELING NITROGEN-CARBON CYCLING AND OXYGEN CONSUMPTION IN BOTTOM SEDIMENTS |
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A model framework is presented for simulating nitrogen and carbon cycling at the sediment–water interface, and predicting oxygen consumption by oxidation reactions inside the sedim...
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MODELING OF AUTO EXHAUST SMOG CHAMBER DATA FOR EKMA DEVELOPMENT |
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A new generalized mechanism for photochemical smog has been developed. The mechanism is suitable for use in the Empirical Kinetics Modeling Approach (EKMA) to estimate the control ...
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MODELING OF SIMULATED PHOTOCHEMICAL SMOG WITH KINETIC MECHANISMS |
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This report supplements the following two journal articles: (1) J. P. Killus and G. Z. Whitten, 'A Mechanism Describing the Photochemical Oxidation of Toluene in Smog,' Atmos. Envi...
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MODELING OF SIMULATED PHOTOCHEMICAL SMOG WITH KINETIC MECHANISMS. VOLUME 1. FINAL REPORT |
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Mechanisms that describe the formation of photochemical smog are developed using a computer modeling technique directed toward the simulation of data collected in two smog chambers...
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MODELING REFLECTANCE AND TRANSMITTANCE OF QUARTZ-FIBER FILTER SAMPLES CONTAINING ELEMENTAL CARBON PARTICLES: IMPLICATIONS FOR THERMAL/OPTICAL ANALYSIS. (R831086) |
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A radiative transfer scheme that considers absorption, scattering, and distribution of light-absorbing elemental carbon (EC) particles collected on a quartz-fiber filter was dev...
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MODELING SUBSTRATE TRANSPORT INTO BIOFILMS: ROLE OF MULTIPLE IONS AND PH EFFECTS |
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Steady-state substrate utilization in biofilms has traditionally been modeled by coupling Fickian diffusion with Monod reaction kinetics. n inherent assumption in most of the previ...
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MODELING SUBSTRATE TRANSPORT INTO BIOFILMS: ROLE OF MULTIPLE IONS AND PH EFFECTS |
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Steady-state substrate utilization in biofilms has traditionally been modeled by coupling Fickian diffusion with Monod reaction kinetics. An inherent assumption in most of the prev...
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MODELING TCE ADSORPTION BY ACTIVATED CARBON PRELOADED WITH NATURAL DISSOLVED ORGANIC MATTER USING A MODIFIED IAST APPROACH. (R828157) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MODELING THE DYNAMICS OF THE INTEGRATED EARTH SYSTEM AND THE VALUE OF GLOBAL ECOSYSTEM SERVICES USING THE GUMBO MODEL. (R827169) |
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A global unified metamodel of the biosphere (GUMBO) was developed to simulate the integrated earth system and assess the dynamics and values of ecosystem services. It is a `...
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MODELING THE EFFECTS OF ACID DEPOSITION: ASSESSMENT OF A LUMPED PARAMETER MODEL OF SOIL WATER AND STREAMWATER CHEMISTRY |
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Quantitative predictions of the effects of acid deposition on terrestrial and aquatic systems require physically based, process-orientated models of catchment soil water and stream...
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MODELING THE EFFECTS OF CLIMATE AND LAND USE CHANGE ON CARBON AND TRACE GAS BUDGETS OVER THE AMAZON REGION USING NASA SATELLITE PRODUCTS |
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As part of the LBA-ECO Phase III synthesis efforts for remote sensing and predictive modeling of Amazon carbon, water, and trace gas fluxes, we are evaluating results from the regi...
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MODELING THE FORMATION OF SECONDARY ORGANIC AEROSOL WITHIN A COMPREHENSIVE AIR QUALITY MODEL SYSTEM |
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The aerosol component of the CMAQ model is designed to be an efficient and economical depiction of aerosol dynamics in the atmosphere. The approach taken represents the particle s...
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MODELING THE IMPACTS OF DECADAL CHANGES IN RIVERINE NUTRIENT FLUXES ON COASTAL EUTROPHICATION NEAR THE MISSISSIPPI RIVER DELTA. (R827785E02) |
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A mathematical model was used to link decadal changes in the Mississippi River nutrient flux to coastal eutrophication near the Mississippi River Delta. Model simulations sugges...
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MODELING THE RICE BUDGET IN CHINA USING GIS TECHNOLOGY |
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Rice paddles are a source of food for over half of the world population and also the source of a very potent greenhouse gas, methane. sing GIS-linked climate based and yield-based ...
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MODELING THE TIME SERIES OF RESPIRABLE SUSPENDED PARTICLES AND CARBON MONOXIDE FROM MULTIPLE SMOKERS: VALIDATION IN TWO PUBLIC SMOKING LOUNGES |
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The Multiple Cigarette Exposure Model (MCEM) was applied to ten field studies of the time series of carbon monoxide (CO), respirable suspended particles (RSP), and number of smoker...
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MODELING TOC (TOTAL ORGANIC CARBON) REMOVAL BY GAC (GRANULAR ACTIVATED CARBON): THE GENERAL LOGISTIC FUNCTION |
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Various models have been proposed to predict the performance of granular activated carbon (GAC) for single and bisolute systems, including the use of a bed depth service model for ...
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MODELLING HYDROLOGY AND SILICON-CARBON INTERACTIONS IN TAIGA AND TUNDRA BIOMES FROM A LANDSCAPE PERSPECTIVE &FRAC34; IMPLICATIONS FOR GLOBAL WARMING FEEDBACKS. (R830882) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MODELLING PHYLOPLANKTON USING A HIGH RESOLUTION, CARBON-BASED FRAMEWORK |
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The Lake Michigan Mass Balance (LMMB) project was initiated by the Great Lakes National Program Office (GLNPO) of the USEPA to determine strategies for managing and remediating t...
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MODELLING PHYTOPLANKTON IN LAKE MICHIGAN USING A HIGH RESULUTION CARBON-BASED FRAMEWORK |
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The Lake Michigan Mass Balance Project was initiated by the U.S. EPA Great Lakes National Program Office to determine strategies for managing toxic chemicals in the lake basin. The...
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MODELS-3 COMMUNITY MULTISCALE AIR QUALITY (CMAQ) MODEL AEROSOL COMPONENT 1: MODEL DESCRIPTION |
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The aerosol component of the Community Multiscale Air Quality (CMAQ) model is designed to be an efficient and economical depiction of aerosol dynamics in the atmosphere. The app...
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MODELS-3/CMAQ APPLICATIONS WHICH ILLUSTRATE CAPABILITY AND FUNCTIONALITY |
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The Models-3/CMAQ developed by the U.S. Environmental Protections Agency (USEPA) is a third generation multiscale, multi-pollutant air quality modeling system within a high-level...
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MODULAR FIELD-BIOREACTOR FOR ACID MINE DRAINAGE TREATMENT |
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The presentation focuses on the improvements to engineered features of a passive technology that has been used for remediation of acid rock drainage (ARD). This passive remedial t...
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MOLECULAR CLONING, CHARACTERIZATION, AND REGULATION OF A PSEUDOMONAS PICKETTII PK01 GENE IN ENCODING PHENOL HYDROXYLASE AND EXPRESSION OF THE GENE IN PSEUDOMONAS AERUGINOSA PA01C |
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A 26 kilobase BamHI restriction endonuclease DNA fragment has been cloned from Pseudomonas pickettii PK01, a strain isolated from a soil microcosm that had been amended with benzen...
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MOLECULAR COMPOSITION OF ORGANICS IN PM 2.5 AT THE NEW YORK CITY SUPERSITE WINTER 2004 |
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Organic compounds in PM2.5 were studied at the New York City Supersite at Queens College, NYC as part of the NYC Supersite Winter 2004 Intensive from January 15 to February 5, 2004...
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MOLECULAR OXYGEN AND THE ADSORPTION OF PHENOLS - EFFECT OF FUNCTIONAL GROUPS |
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This study reveals that the presence of molecular oxygen (oxic conditions) has a significant impact on the exhibited adsorptive capacity of granular activated carbon (GAC) for seve...
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MOLYBDENUM ENRICHMENT AS AN INDICATOR OF HYPOXIC WATER CONDITION |
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Most programs examining the extent of low dissolved oxygen (DO) conditions in marine systems require in-situ sensors to be deployed during periods of low DO. This limits the abilit...
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MONITORED NATURAL ATTENUATION AND RISK MANAGEMENT OF MTBE IN GROUND WATER (LOS ANGELES, CA) |
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Monitored natural attenuation (as U.S. EPA defines the term) is a remedy, where natural processes bring the concentration of MTBE to an acceptable level in a reasonable period of t...
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MONITORING AND MODELING METHODS FOR DEVELOPING AIR POLLUTION CONTROL STRATEGIES: A CASE STUDY IN THE NORTHWEST CZECH REPUBLIC |
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Scientists from the United States and the Czech Republic recently completed a study to investigate the ambient air quality impact of industrial and motor vehicle sources in Teplice...
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MONITORING AND UNDERSTANDING CONDITIONS AND TRENDS IN US ESTUARIES |
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Estuarine systems are complex and dynamic, being responsive to changes in the atmosphere, on land, and at their seaward boundary. Talks in this session describe how changes can be ...
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MONITORING BIOTRANSFORMATION AND BIODEGRADATION OF XENOBIOTICS IN SIMULATED AQUATIC MICROENVIRONMENTAL SYSTEMS |
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Microbiological studies coupled with physiochemical analysis of environmentally significant xenobiotics were conducted in continuous flowthrough and carbon metabolism microcosms to...
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MONITORING CRUDE OIL MINERALIZATION IN SALT MARSHES: USE OF STABLE CARBON ISOTOPE RATIOS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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MONITORING EFFLUENTS FROM AN AIR TOXIC CONTROL DEVICE USING CONTINUOUS NON-METHANE ORGANIC CARBON (C-NMOC) ANALYZER. (R825511C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MONITORING FOOD WEB CHANGES IN TIDE-RESTORED SALT MARSHES: A CARBON STABLE ISOTOPE APPROACH |
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Primary producer (angiosperms, macroalgae, submerged aquatic vegetation), suspended particulate matter, and Fundulus heteroclitus isotope values (d13C , d15N, d34S) were examined t...
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MONITORING FOREST CARBON SEQUESTRATION WITH REMOTE SENSING AND CARBON CYCLE MODELING. (R828309) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MONITORING OF PARTICULATE MATTER OUTDOORS |
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Recent studies of the size and composition of atmospheric particulate matter (PM) have demonstrated the usefulness of separating atmospheric PM into its fine and coarse components....
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MONITORING POLYCHLORINATED BIPHENYLS (PCBS) BIODEGRADATION USING CONTINUOUS-FLOW ISOTOPE RATIO MASS SPECTROMETRY |
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Research has shown that polychlorinated biphenyls (PCBs) in some cases can be removed from the environment by biodegradation. Aerobic and anaerobic biological processes have been ...
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MONITORING SYSTEM FOR COLLECTION AND ANALYSES OF AMBIENT ETHYLENE DICHLORIDE (EDC) LEVELS IN THE URBAN ATMOSPHERE |
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A method for the measurement of ambient levels of ethylene dichloride (EDC) was developed and field tested. A 24-hour integrated sample is taken with an activated charcoal tube, fo...
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MONITORING TECHNIQUES FOR CARBON FIBER EMISSIONS: EVALUATION A |
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An investigation was carried out of methods and techniques applicable to the detection and monitoring of carbon fibers as they are emitted in processes involving their manufacture ...
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MONITORING TECHNIQUES FOR CARBON FIBER EMISSIONS: EVALUATION B |
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An evaluation of available measurement methods for continously monitoring the number and mass of carbon fibers emitted from source operations was conducted. A total of eleven candi...
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MONITORING TOXIC ORGANIC GASES AND PARTICLES NEAR THE WORLD TRADE CENTER AFTER SEPTEMBER 11, 2001 |
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The September 11, 2001 attack on the World Trade Center (WTC) resulted in an intense fire and the subsequent, complete collapse of the two main structures and adjacent buildings,...
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MONOTERPENE LEVELS IN NEEDLES OF DOUGLAS-FIR EXPOSED TO ELEVATED CO2 AND TEMPERATURE |
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Levels of monoterpenes in current year needles of douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were measured at the conclusion of four years of exposure to ambient ...
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MORE THAN JUST BAIT: BURROWING SHRIMP AS ECOSYSTEM ENGINEERS IN OREGON ESTUARIES - SEPTEMBER 2006 |
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Burrowing shrimp may be most widely known as excellent fishing bait, but they also play important roles in estuaries of the Pacific Northwest. These shrimps strongly affect carbon...
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MOTOR VEHICLE EMISSIONS UNDER REDUCED AMBIENT TEMPERATURE IDLE OPERATING CONDITIONS (JOURNAL VERSION) |
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Gasoline motor vehicle organic emissions are elevated by reduced ambient temperature operating conditions, and the practice of warming vehicles with extended idle periods, as is co...
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MOTOR VEHICLES AS SOURCES OF COMPOUNDS IMPORTANT TO TROPOSPHERIC AND STRATOSPHERIC OZONE |
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One of the most rapidly growing human activities in the U.S. of importance to atmospheric ozone is the use of highway motor vehicles. Transportation sources are estimated to have b...
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MOUSE SKIN TUMOR INITIATION-PROMOTION AND COMPLETE CARCINOGENESIS BIOASSAYS: MECHANISMS AND BIOLOGICAL ACTIVITIES OF EMISSION SAMPLES |
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Extracts of soots obtained from various sources were applied to the skin of mice in an effort to identify carcinogens in these mixtures and to link these materials to the etiology ...
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MTBE BIODEGRADATION IN A GRAVITY FLOW, HIGH-BIOMASS RETAINING BIOREACTOR |
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The aerobic biodegradation of methyl tert-butyl ether (MtBE), a widely used fuel oxygenate, was investigated using a pilot-scale biomass-retaining bioreactor called a Biom...
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MULTICOMPONENT ADSORPTION OF VOLATILE ORGANIC CHEMICALS ONTO GRANULAR ACTIVATED CARBON |
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A technique has been developed to predict the fixed-bed removal of known SOCs in background mixtures of unknown composition. In addition, this technique was used to relate the remo...
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MULTIDISCIPLINARY APPROACH TO TOXICOLOGICAL SCREENING: I. SYSTEMIC TOXICITY |
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The toxicity of 10 chemicals (carbaryl, carbon tetrachloride, chlordane, ethylhexylphthalate, dichloromethane, heptachlor, phenol, tetrachloroethylene, triadimefon, and trichloroet...
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MULTIDISCIPLINARY APPROACH TO TOXICOLOGICAL SCREENING: II. DEVELOPMENTAL TOXICITY |
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As part of the validation of an integrated bioassay for systemic, neuro-, and developmental toxicity, we evaluated the responses of Fischer-344 rats to four pesticides, four chlori...
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MULTIDISCIPLINARY APPROACH TO TOXICOLOGICAL SCREENING: IV. COMPARISON OF RESULTS |
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Toxicity data collected under standardized test conditions may be of the utmost importance in health risk assessment, in which human exposure limits are often derived from laborato...
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MULTIMEDIA ASSESSMENT OF POLLUTION POTENTIALS OF NON-SULFUR CHEMICAL PULPING TECHNOLOGY |
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This report gives an estimate of the air, water, and solid waste pollution generated by developing and existing non-sulfur pulping techniques that are potentially competitive with ...
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MULTIPLE PROJECTS SYSTEM (MPS) VERSION 2.0 - USER'S MANUAL |
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The document is a user's manual for Multiple Projections System (MPS) Version 2.0, based on the 3% reasonable further progress (RFP) tracking system that was developed in FY92/FY93...
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MULTIPLE REPLICONS CONSTITUTING THE GENOME OF PSEUDOMONAS CEPACIA 17616 |
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Macrorestriction fragment analysis of DNA from Pseudomonas cepacia 17616, in conjunction with Southern hybridization experiments using junction n enzyme sites as probes, indicated ...
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MULTIVARIATE ANALYSIS OF MACROINVERTEBRATE ASSEMBLAGES TO DETERMINE IMPACTS ON ROCKY MOUNTAIN STREAM ECOSYSTEMS |
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Using reduncancy (RDA) and canonical correlation analysis (CCA) we assessed relationships between chemical and physical characteristics and periphyton at 105 stream sites sampled b...
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MULTIYEAR REAL-TIME MONITORING OF PARTICLES, PAH, AND BLACK CARBON IN AN OCCUPIED HOUSE |
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Concentrations of ultrafine, fine, and coarse particles, particle-bound polycyclic aromatic hydrocarbons (PAH), and black carbon have been measured continuously (every 1 to 5 min...
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MUNICIPAL WASTE COMBUSTION MULTIPOLLUTANT STUDY EMISSION TEST REPORT, MAINE ENERGY RECOVERY COMPANY, RE- FUSE DERIVED FUEL FACILITY, BIDDEFORD, MAINE - VOLUME I: SUMMARY OF RESULTS |
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The report gives results of an emission test of a new municipal solid waste combustor, in Biddeford, ME, that burns refuse-derived fuel and is equipped with a lime spray dryer fabr...
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MUNICIPAL WASTE COMBUSTION, MULTIPOLLUTANT STUDY, EMISSION TEST REPORT, MAINE ENERGY RECOVERY COMPANY REFUSE DERIVED FUEL FACILITY, BIDDEFORD, MAINE - VOLUME I |
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The report gives results of an emission test of a new municipal solid waste combustor, in Biddeford, ME, that burns refuse-derived fuel and is equipped with a lime spray dryer fabr...
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MUNICIPAL WASTE COMBUSTION, MULTIPOLLUTANT STUDY, EMISSION TEST REPORT, MAINE ENERGY RECOVERY COMPANY REFUSE DERIVED FUEL FACILITY, BIDDEFORD, MAINE - VOLUME III: APENDICES G-N |
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The report gives results of an emission test of a new municipal solid waste combustor, in Biddeford, ME, that burns refuse-derived fuel and is equipped with a lime spray dryer fabr...
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MUNICIPAL WASTE COMSUTION, MULTIPOLLUTANT STUDY, EMISSION TEST REPORT, MAINE ENERGY RECOVERY COMPANY REFUSE DERIVED FUEL FACILITY, BIDDEFORD, MAINE - VOLUME II: APPENDICES A-F |
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The report gives results of an emission test of a new municipal solid waste combustor, in Biddeford, ME, that burns refuse-derived fuel and is equipped with a lime spray dryer fabr...
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MUTAGENIC ACTIVITY AND CHEMICAL CHARACTERIZATION FOR THE PALO ALTO WASTEWATER RECLAMATION AND GROUNDWATER INJECTION FACILITY |
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At the Palo Alto Reclamation Plant 0.044 cu m/s (1 mgd) of secondary effluent is reclaimed through a series of wastewater treatment processes. Mutagenic activity was consistently f...
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MUTAGENIC ACTIVITY OF THE PRODUCTS OF PROPYLENE PHOTOOXIDATION |
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The reactants and products in irradiated propylene/NOx mixtures were brought to a steady-state distribution in a Teflon smog chamber operated in a dynamic mode. The effluent from t...
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MUTAGENIC ATMOSPHERIC AEROSOL SOURCES APPORTIONED BY RECEPTOR MODELING |
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During the winter of 1985, the U.S. Environmental Protection Agency (EPA) collected air quality data and samples in residential locations in Albuquerque. ew Mexico and Raleigh, Nor...
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MUTAGENIC RESIDUES RECOVERED FROM GRANULAR ACTIVATED CARBON AFTER ITS USE IN DRINKING WATER TREATMENT |
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In addition to its use in removal of compounds which cause taste, odor or color problems in drinking water, granular activated carbon (GAC) has received increasing attention as a t...
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MUTAGENICITY AND DISINFECTION BY-PRODUCTS IN SURFACE DRINKING WATER DISINFECTED WITH PERACETIC ACID |
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The aims of this research were to study the influence of peracetic acid (PAA) on the formation of mutagens in surface waters used for human consumption and to assess its potential ...
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MYCORRHIZAE ALTER QUALITY AND QUANTITY OF CARBON ALLOCATED BELOW GROUND |
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Plants and soils are a critically important element in the global carbon-energy equation. t is estimated that in forest ecosystems over two-thirds of the carbon is contained in soi...
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MYCORRHIZAL VS. SAPROTROPHIC STATUS OF FUNGI: THE ISOTOPIC EVIDENCE |
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Relative abundance of carbon (C) and nitrogen (N) isotopes in fungal sporocarps may prove useful in unraveling fungal roles in ecosystems. Sporocarps of known mycorrhizal or saprot...
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Mechanisms of perfluoroalkyl acid (PFAA) toxicity: Involvement of peroxisome proliferator activator receptor alpha (PPAR) molecular signals. |
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Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are members of a family of environmentally persistent perfluorinated compounds and are found in the serum of wild...
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Metals Release From Mining-Impacted Streambed Sediments: North Fork Clear Creek, Colorado |
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Many miles of streams in the US (and worldwide) are contaminated by metals originating from both active and abandoned mine sites. Streams affected by mine drainage are often toxic ...
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Microbial Community Structure in Petroleum Contaminated SedimentsCorresponds to Geophysical Signatures |
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The interdependence between geoelectrical signatures at underground petroleum plumes and the structure of subsurface microbial communities was investigated. In sediments contamin...
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Microwave-Assisted Synthesis of Nanomaterials and Nanocomposites |
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The aqueous preparation of nanoparticles using vitamins B1 and B2, and vitamin C which can function both as reducing and capping agents prompted us accomplished the bulk syntheses ...
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N2O EMISSIONS FROM STREAMS IN THE NEUSE RIVER WATERSHED, NORTH CAROLINA |
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The paper presents N2O emission data from 11 sites in the Neuse River watershed. Emissions were measured using a static surface enclosure technique deployed on eight sit...
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NANOSCALE BIOSENSORS IN ECOSYSTEM EXPOSURE RESEARCH |
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This powerpoint presentation presented information on nanoscale biosensors in ecosystem exposure research. The outline of the presentation is as follows: nanomaterials environmenta...
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NATIONAL ASSESSMENT OF ENVIRONMENTAL AND ECONOMIC BENEFITS FROM METHANE CONTROL AND UTILIZATION TECHNOLOGIES AT U.S. UNDERGROUND COAL MINES |
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The report gives results of EPA research into the emission processes and control strategies associated with underground coal mines in the U.S. (NOTE: Methane is a greenhouse gas in...
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NATIONAL PERFORMANCE AUDIT PROGRAM AMBIENT AIR AUDITS OF ANALYTICAL PROFEICIENCY--1988 |
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This report presents the results of the U.S Environmental Protection Agencys 1988 National Ambient Air Performance Audit Program, Semiannual audits were conducted for lead, nitrate...
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NATIONAL PERFORMANCE AUDIT PROGRAM: 1979 PROFICIENCY SURVEYS FOR SULFUR DIOXIDE, NITROGEN DIOXIDE, CARBON MONOXIDE, SULFATE, NITRATE, LEAD AND HIGH VOLUME FLOW |
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The Quality Assurance Division of the Environmental Monitoring Systems Laboratory, Research Triangle Park, North Carolina, administers semiannual Surveys of Analytical Proficiency ...
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NATIONAL PERFORMANCE AUDIT PROGRAM: 1980 PROFICIENCY SURVEY FOR SULFUR DIOXIDE, NITROGEN DIOXIDE, CARBON MONOXIDE, SULFATE, NITRATE, LEAD AND HIGH VOLUME FLOW |
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Based on authority granted by provisions of the Clean Air Act (42 U.S.C 7410, et seq.), the Quality Assurance Division of the Environmental Monitoring Systems Laboratory, Research ...
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NATIONAL PERFORMANCE AUDIT PROGRAM: AMBIENT AIR AUDITS OF ANALYTICAL PROFICIENCY - 1982 |
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The report summarizes results of the Ambient Air Audits of Analytical Proficiency for the calendar year 1982. Audits were conducted for SO2, NO2, sulfate, nitrate, lead, carbon mon...
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NATIONAL PLAN FOR THE SAFETY AND HEALTH OF DIVERS IN THEIR QUEST FOR SUBSEA ENERGY |
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The report contains recommendations for improving the health and safety of divers in fourteen biomedical topical chapters. They are: (1) exchange of inert gases, oxygen and carbon ...
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NATIONAL- AND STATE-LEVEL EMISSIONS ESTIMATES OF RADIATIVELY IMPORTANT TRACE GASES (RITGS) FROM ANTHROPOGENIC SOURCES |
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The report documents the development of national- and state- level emissions estimates of radiatively important trace gases (RlTGs). Emissions estimates are presented for the princ...
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NATIONAL- AND STATE-LEVEL EMISSIONS ESTIMATES OF RADIATIVELY IMPORTANT TRACE GASES (RITGS) FROM ANTHROPOGENIC SOURCES |
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The report documents the development of national- and state- level emissions estimates of radiatively important trace gases (RlTGs). Emissions estimates are presented for the princ...
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NATURAL ABUNDANCE STABLE ISOTOPE RATIOS SUPPORT MYCO-HETEROTROPHIC NATURE AND HOST -SPECIFICITY OF CERTAIN ACHLOROPHYLLUS PLANTS |
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Over 400 species of achlorophyllous vascular plants are thought to obtain all carbon from symbiotic fungi. Consequently, they are termed ?myco-heterotrophic.' However, direct evide...
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NATURAL EMISSIONS OF NON-METHANE VOLATILE ORGANIC COMPOUNDS, CARBON MONOXIDE, AND OXIDES OF NITROGEN FROM NORTH AMERICA |
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The magnitudes, distributions, controlling processes and uncertainties associated with North American natural emissions of oxidant precursors are reviewed. Natural emissions are r...
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NATURAL EMISSIONS OF NON-METHANE VOLATILE ORGANIC COMPOUNDS, CARBON MONOXIDE, AND OXIDES OF NITROGEN FROM NORTH AMERICA. (R825259) |
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AbstractThe magnitudes, distributions, controlling processes and uncertainties associated with North American natural emissions of oxidant precursors are reviewed. Natu...
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NATURAL EMISSIONS OF NON-NETHANE VOLATILE ORGANIC COMPOUNDS, CARBON MONOXIDE, AND OXIDES OF NITROGEN FROM NORTH AMERICA. (R825419) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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NATURAL GRADIENT EXPERIMENT ON SOLUTE TRANSPORT IN A SAND AQUIFER. 1. APPROACH AND OVERVIEW OF PLUME MOVEMENT |
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A large-scale field experiment on natural gradient transport of solutes in groundwater has been conducted at a site in Borden, Ontario. Well-defined initial conditions were achieve...
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NATURAL GRADIENT EXPERIMENT ON SOLUTE TRANSPORT IN A SAND AQUIFER. 3. RETARDATION ESTIMATES AND MASS BALANCES FOR ORGANIC SOLUTES |
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The long-term behavior of five organic solutes during transport over a period of 2 years in ground water under natural gradient conditions was characterized quantitatively by means...
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NATURAL GRADIENT EXPERIMENT ON SOLUTE TRANSPORT IN A SAND AQUIFER. 4. SORPTION OF ORGANIC SOLUTES AND ITS INFLUENCE ON MOBILITY |
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Laboratory investigations were conducted to determine whether the observed field retardation of bromoform, carbon tetrachloride, tetrachloroethylene, 1,2-dichlorobenzene, and hexac...
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NATURAL MIGRATION RATES OF TREES: GLOBAL TERRESTRIAL CARBON CYCLE IMPLICATIONS |
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NO ABSTRACT PROVIDED...
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NAVAL STORES WASTEWATER PURIFICATION AND REUSE BY ACTIVATED CARBON TREATMENT |
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This report documents the reasons for selecting a physico-chemical process instead of a more conventional biological process for secondary treatment of the complex organic wastewat...
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NDMA TREATMENT BY SEQUENTIAL GAC ADSORPTION AND FENTON DRIVEN DESTRUCTION |
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N-nitrosodimethylamine (NDMA) is a highly toxic microcontaminant that was first detected in groundwater tainted by rocket fuel manufacturing wastes. More recently NDMA has been det...
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NEAR CONTINUOUS MEASUREMENT OF HYDROGEN SULFIDE (H2S) AND CARBONYL SULFIDE (COS) BY AN AUTOMATIC GAS CHROMATOGRAPH |
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The article describes an automatic gas chromatograph with a flame photometric detector (GC-FPD) that samples and analyzes hydrogen sulfide (H2S) and carbonyl sulfide (COS) at 30- s...
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NEAR CRITICAL CO2 EXTRACTION OF HAZARDOUS ORGANICS FROM ACRYLONITRILE, PESTICIDE AND STEEL MILL WASTES |
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Near critical carbon dioxide was used to extract hazardous organic chemicals from three aqueous waste streams in a pilot plant scale continuous liquid-liquid extraction system. Ext...
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NEAR-LIFETIME EXPOSURE OF THE RAT TO A SIMULATED URBAN PROFILE OF NITROGEN DIOXIDE: PULMONARY FUNCTION EVALUATION |
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To investigate the potential for near-ambient levels of nitrogen dioxide (NO2) to induce functional lung damage, groups of rats were exposed to air or a simulated urban profile of ...
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NEARSHORE MARINE TRACE METAL GEOCHEMISTRY |
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The report summarizes a number of studies on several aspects of the nearshore geochemistry of trace metals which give information on consequences of trace metal pollution attending...
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NEGATIVE CHEMICAL IONIZATION STUDIES OF HUMAN AND FOOD CHAIN CONTAMINATION WITH XENOBIOTIC CHEMICALS |
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Negative chemical ionization mass spectrometry with a mixture of isobutane, methylene chloride, and oxygen as the reagent gas has been used to explore contamination of environmenta...
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NEUROBEHAVIORAL EFFECTS OF ENVIRONMENTAL TOBACCO SMOKE |
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In order to try to predict effects of environmental tobacco smoke, neurobehavioral effects of mainstream smoke were reviewed and, in conjunction with what is known about body uptak...
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NEW ADVANCES IN BORON SOIL CHEMISTRY |
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Boron is an essential plant micronutrient for which the range between deficiency and toxicity is narrower than for any other nutrient element. Plants respond directly to the amoun...
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NEW DIRECTIONS: VOCS AND BIOSPHERE-ATMOSPHERE FEEDBACKS |
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Shallcross and Monks [New Directions: a Role For Isoprene in Biosphere-Climate-Chemistry Feedbacks, Atmospheric Environment, Vol. 34 (2000) pp. 1659-1660] recently summarized the...
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NEW PERSPECTIVES IN AQUATIC REDOX CHEMISTRY: ABIOTIC TRANSFORMATION OF POLLUTANTS IN GROUNDWATER AND SEDIMENTS |
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Presented is a review of recent advances in the chemistry of abiotic redox transformations of organic pollutants in anaerobic ecosystems. he goal is to provide an indication of the...
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NEWS: US DECARBONIZATION OPTIONS |
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The quest to reduce reliance on energy generating technologies releasing global warming pollutants usch as carbon dioxide and methane has been a target of concern across the world....
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NHEXAS PHASE I ARIZONA STUDY--STANDARD OPERATING PROCEDURE FOR ANALYSIS OF 2-PHASE MULTISORBENT SAMPLERS FOR VOCS (BCO-L-31.0) |
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The purpose of this SOP is to describe the methodology for the analysis of certain trace volatile organic compounds (VOCs) in air that are captured on two-phase carbon-based multis...
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NHEXAS PHASE I ARIZONA STUDY--STANDARD OPERATING PROCEDURE FOR ANALYSIS OF 3-PHASE MULTISORBENT SAMPLERS FOR VOCS (BCO-L-22.1) |
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The purpose of this SOP is to describe the methodology for the analysis of certain trace volatile organic compounds (VOCs) in air that are captured on carbon-based multisorbent tub...
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NHEXAS PHASE I ARIZONA STUDY--STANDARD OPERATING PROCEDURE FOR PREPARATION OF MULTISORBENT TUBES FOR ACTIVELY-PUMPED VOC SAMPLERS (BCO-L-18.1) |
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The purpose of this SOP is to describe the procedures followed in the preparation of carbon-based multisorbent tubes for the collection of volatile organic compounds (VOCs) in air ...
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NHEXAS PHASE I REGION 5 STUDY--STANDARD OPERATING PROCEDURE FOR THE HYDRO 'PICOSYSTEM PLUS' ULTRAPURE WATER SYSTEM (NHX/SOP-300-009) |
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This procedure describes the operation and maintenance of the Hydro Picosystem Plus ultrapure water system. Ultrapure water is essential in many laboratory processes from sample pr...
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NHEXAS PHASE I REGION 5 STUDY--STANDARD OPERATING PROCEDURE--ANALYSIS OF VOLATILE ORGANIC COMPOUNDS FROM CHARCOAL BADGES BY GAS CHROMATOGRAPHY/MASS SPECTROMETRY (RTI/ACS-AP-209-112) |
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This protocol provides guidelines for determining volatile organic hydrocarbons (VOCs) in air samples by gas chromatography/mass spectrometry (GC/MS). This method is for the analys...
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NITRATES IN GROUNDWATER RESULTING FROM MANURE APPLICATIONS TO IRRIGATED CROPLANDS |
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Field data were collected from experimental plots located near Grand Junction Colorado. Data collections were designed to provide a sufficiently broad range of conditions such that...
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NITROGEN AND CARBON STABLE ISOTOPE ABUNDANCES SUPPORT THE MYCO-HETEROTROPHIC NATURE AND HOST-SPECIFICITY OF CERTAIN ACHLOROPHYLLOUS PLANTS |
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? Over 400 species of achlorophyllous vascular plants are thought to obtain all carbon from symbiotic fungi. Consequently, they are termed ?myco-heterotrophic.' However, direc...
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NITROGEN DEPOSITION AND ORGANIC MATTER MANIPULATIONS AFFECT GROSS AND NET NITROGEN TRANSFORMATIONS IN TWO TEMPERATE FORESTS SOILS |
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Soil nitrogen transformations are intricately linked to carbon transformations. We utilized two existing organic matter manipulation sites in western Oregon, USA and Hungary to in...
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NITROGEN DIOXIDE, PULMONARY FUNCTION, AND RESPIRATORY DISEASE |
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Concern as to the toxicity of the oxides of nitrogen has been frequently expressed in clinical and toxicological literature. Oxides of nitrogen are highly reactive compounds and su...
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NITROGEN DISTRIBUTION AND 15N IN A 115-YEAR CHRONOSEQUENCE OF OLD-FIELD WHITE PINE |
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Regrowing forests of the northeastern US are expected to serve as an important sink for carbon and nitrogen as they recover from extensive clearing and agriculture. We used a chron...
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NITROGEN LOSS FROM SMALL WATERSHEDS IN THE OREGON CASCADES: A STUDY OF FOREST SUCCESSION INFLUENCE |
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Traditional biogeochemical theory suggests that biotic N limitation (N demand by plants and soil microorganisms) controls ecosystem nitrogen (N) losses, and that stream N export sh...
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NITROGEN OXIDES REACTIONS WITHIN URBAN PLUMES TRANSPORTED OVER THE OCEAN |
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The report describes an airborne measurements program in the downwind urban plume of Boston. The variables measured included ozone, nitric oxide, oxides of nitrogen, nitric acid, p...
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NO/CHAR REACTIONS AT PULVERIZED COAL FLAME CONDITIONS |
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The paper discusses nitrogen oxide (NO)/char reactions at pulverized-coal flame conditions. he effective rate of the NO/char reaction, measured over the temperature range 1250 to 1...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES OR ORGANIC TRANSFORMATIONS |
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Non-traditional 'Greener' Alternatives to Organic Transformations
Synthetic organic transformations performed under non-traditional conditions are becoming popular prim...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO ORGANIC SYNTHESES |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO SYNTHETIC ORGANIC TRANSFORMATIONS |
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Non-traditional 'Greener' Alternatives to Synthetic Organic Transformations
Rajender S. Varma
Synthetic organic transformations performed under non-traditional condition...
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NON-URBAN HYDROCARBON CONCENTRATIONS IN AMBIENT AIR NORTH OF HOUSTON, TEXAS |
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In January 1978, a study was undertaken at Jones State Forest, 38 miles north of Houston, Texas, to determine the concentrations of non-methane hydrocarbons, methane, and carbon mo...
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NONEQUILIBRIUM SORPTION DURING DISPLACEMENT OF HYDROPHOBIC ORGANIC CHEMICALS AND 45CA THROUGH SOIL COLUMNS WITH AQUEOUS AND MIXED SOLVENTS |
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A series of miscible displacement experiments was conducted to investigate the significance of intraorganic matter diffusion (IOMD) as the rate-limiting step in sorption of organic...
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NONMETHANE ORGANIC CARBON CONCENTRATIONS IN AIR MASSES ADVECTED INTO URBAN AREAS IN THE UNITED STATES |
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The report describes recent aircraft sampling programs to measure nonmethane organic carbon (NMOC) levels aloft in the upwind vicinity of several U.S. cities during the morning per...
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NONPHOTOCHEMICAL DECOMPOSITION OF FLUORENE VAPOR-ADSORBED ON COAL FLY ASH |
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Fluorene is representative of a group of polycyclic aromatic hydrocarbons that have been shown to exhibit oxidation in the absence of light when adsorbed on fly ash. The present st...
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NONPOINT SOURCE POLLUTION IMPACTS OF ALTERNATIVE AGRICULTURAL MANAGEMENT PRACTICES IN ILLINOIS: A SIMULATION STUDY |
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The 1987 National Resources Inventory (NRI) was used to provide a random sample of 100 Illinois cropland sites growing corn and soybeans. hese were used with the Erosion Productivi...
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NORTH AMERICAN LANDSCAPE CHARACTERIZATION (NALC): RESEARCH PLAN |
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The North American Landscape Characterization (NALC) project is a component of the National Aeronautics and Space Administration (NASA) Landsat Pathfinder program of experiments to...
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NOVEL CHROMATOGRAPHIC SEPARATION AND CARBON SOLID PHASE EXTRACTION OF ACETANILIDE HERBICIDE DEGRADATION PRODUCTS |
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Six acetanilide herbicides are currently registered for use in the U.S. Over the past several years, ethanesufonic acid (ESA) and oxanilic acid (OA) degradatoin products of these ...
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NOVEL ECONOMICAL HG(0) OXIDATION REAGENT FOR MERCURY EMISSIONS CONTROL FROM COAL-FIRED BOILERS |
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The authors have developed a novel economical additive for elemental mercury (Hg0) removal from coal-fired boilers. The oxidation reagent was rigorously tested in a lab-scale fixed...
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NOVEL EMBEDDED CERAMIC ELECTRODE SYSTEM TO ACTIVATE NANOSTRUCTURED TITANIUM DIOXIDE FOR DEGRADATION OF MTBE |
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A novel reactor combining a flame-deposited nanostructured titanium dioxide film and a set of embedded ceramic electrodes was designed, developed and tested for degradation of meth...
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NOVEL MODEL DESCRIBING TRACE METAL CONCENTRATIONS IN THE EARTHWORM, EISENIA ANDREI |
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We developed a novel model describing Eisenia andrei body concentrations for Cd, Cu, Pb, and Zn as a function of pH, metals, and soluble organic carbon (SOC) in soil extracts for p...
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NOVEL MODEL DESCRIBING TRACE METAL CONCENTRATIONS IN THE EARTHWORM, EISENIA ANDREI: JOURNAL ARTICLE |
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NRMRL-CIN-1707
Sake, J.K., Impellitteri**, C.A., Peijnenburg, W., and Allen, H.E. Novel Model Describing Trace
Metal Concentrations in the Earthworm, Eisenia andrei. Environmental ...
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NOVEL ORGANIZATION OF THE GENES FOR PHTHALATE DEGRADATION FROM BURKHOLDERIA CEPACIA DBO1 |
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Burkholderia cepacia DBO1 is able to utilize phthalate as the sole source of carbon and energy for growth. Two overlapping cosmid clones containing the genes for phthalate degradat...
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NOVEL OXIDANT FOR ELEMENTAL MERCURY CONTROL FROM FLUE GAS |
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A novel economical oxidant has been developed for elemental mercury (Hg(0)) removal from coal-fired boilers. The oxidant was rigorously tested in a lab-scale fixed-bed system with...
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NOVEL OXIDANT FOR ELEMENTAL MERCURY CONTROL FROM FLUE GAS |
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The primary objective of this study is to develop and test advanced noncarbonaceous solid sorbent materials suitable for removing the elemental form of mercury from power plant emi...
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NOVEL RHODIUM (I) CATALYSTS FOR ECOLOGICALLY BENIGN HOMOGENEOUS CATALYSIS IN SUPERCRITICAL CARBON DIOXIDE. (R826694C640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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NOX AND CO EMISSIONS FROM SOIL AND SURFACE LITTER IN A BRAZILIAN SAVANNA |
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Land clearing and burning in the tropics often results in increased solar irradiation of soil and surface organic matter. This increased light exposure and surface heating may impa...
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NUCLEOTIDE SEQUENCING AND TRANSCRIPTIONAL MAPPING OF THE GENES ENCODING BIPHENYL DIOXYGENASE, A MULTICOM- PONENT POLYCHLORINATED-BIPHENYL-DEGRADING ENZYME IN PSEUDOMONAS STRAIN LB400 |
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The DNA region encoding biphenyl dioxygenase, the first enzyme in the biphenyl-polychlorinated biphenyl degradation pathway of Pseudomonas species strain LB400, was sequenced. Six ...
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NUCLEOTIDE SEQUENCING AND TRANSCRIPTIONAL MAPPING OF THE GENES ENCODING BIPHENYL DIOXYGENASE, A MULTICOMPONENT POLYCHLORINATED-BIPHENYL-DEGRADING ENZYME IN PSEUDOMONAS STRAIN LB400 |
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The DNA region encoding biphenyl dioxygenase, the first enzyme in the biphenyl-polychlorinated biphenyl degradation pathway of Pseudomonas species strain LB400, was sequenced. ix o...
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NUTRIENT SOUIRCES, TRANSPORT, AND FATE IN COUPLED WATERSHED-ESTUARINE SYSTEMS OF COASTAL ALABAMA |
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The processes regulating sources, transport, and fate of nutrients were studied in 3 coupled watershed-estuarine systems that varied mainly by differences in the dominant land use-...
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NUTRIENT-MEDIATED SHIFTS IN COASTAL WERLAND FOOD FISH STRUCTURE |
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Numerous studies have revealed the importance of algae as an energetic base for wetland food webs. Earlier stable isotope analyses in a Lake Superior coastal werland (Allouez Bay, ...
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NUTRIENTS FOR BACTERIAL GROWTH IN DRINKING WATER: BIOASSAY EVALUATION |
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The regrowth of bacteria in drinking water distribution systems can lead to the deterioration of water quality. Pathogenic bacteria are heterotrophs, and heterotrophs are probably ...
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Noble Metal Decoration and Alignment of Carbon Nanotubes in Carboxymethyl Cellulose |
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A facile microwave (MW) method is described that accomplishes alignment and decoration of noble metals on carbon nanotubes wrapped with carboxymethyl cellulose (CMC). Carbon nanot...
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OBTAINING IMPROVED PRODUCTS FROM THE ORGANIC FRACTION OF MUNICIPAL SOLID WASTE |
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This project has investigated several processes for the conversion of the organic fraction of municipal solid waste (MSW) to a powder. The study concentrated on two types of proces...
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OCCURRENCE OF SELECTED PHARMACEUTICAL AND NON-PHARMACEUTICAL COMPOUNDS, AND STABLE HYDROGEN AND OXYGEN ISOTOPE RATIOS, IN A RIVERBANK FILTRATION STUDY, PLATTE RIVER, NEBRASKA, 2001 TO 2003, VOLUME 1. DATA SERIES 117. |
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Although studied extensively in recent years in Europe, the occurrence of endocrine disrupters and other organic wastewater compounds in the environment in the United States is not...
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OCCURRENCE OF TRANSIENT PUFFS IN A ROTARY KILN INCINERATOR SIMULATOR. 2. CONTAINED LIQUID WASTES ON SORBENT |
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The paper gives results of a study of the generation of transient puffs resulting from the batch incineration of liquid waste into a 73 kW rotary kiln incinerator simulator. The li...
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OCCURRENCE, GENOTOXICITY, AND CARCINOGENICITY OF EMERGING DISINFECTION BY-PRODUCTS IN DRINKING WATER: A REVIEW AND ROADMAP FOR RESEARCH |
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Occurrence, Genotoxicity, and Carcinogenicity of Emerging Disinfection By-products in Drinking Water: A Review and Roadmap for Research
Summary of Paper
What is study?...
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OCTANOL/WATER PARTITION COEFFICIENTS AND WATER SOLUBILITIES OF PHTHALATE ESTERS |
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Measurements of the octanol/water partition coefficients (K-ow) and water solubilities of di-n-octyl phthalate (DnOP) and di-n-decyl phthalate (DnDP) by the slow-stirring method ar...
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OF MICE, MEN, MONKEYS AND METABOLISM: AN UPDATE ON THE DEVELOPMENTAL TOXICITY OF METHANOL |
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With a world production ca. 30 million tons per year, methanol is a solvent, is used to produce formaldehyde, MTBE, and acetic acid, is a component of aspartame, and has been propo...
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ON ESTIMATING AGRICULTURE'S NET CONTRIBUTION TO ATMOSPHERIC CARBON |
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Fossil fuel combustion, chlorofluorocarbon releases, and agricultural activities (including deforestation) are the primary anthropogenic sources of greenhouse gases. Of the three s...
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ON THE RELATIONSHIP BETWEEN CO, POHC, AND PIC EMISSIONS FROM A SIMULATED HAZARDOUS WASTE INCINERATOR |
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Measurements conducted on full-scale hazardous waste incinerators have occasionally shown a relationship between carbon monoxide (CO) emissions and emissions of toxic organic compo...
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ON-LINE DEOXYGENATION IN REDUCTIVE (AND OXIDATIVE) AMPEROMETRIC DETECTION: ENVIRONMENTAL APPLICATIONS IN THE LIQUID CHROMATOGRAPHY OF ORGANIC PEROXIDES |
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Cyclic voltammetry was used qualitatively to characterize and determine the feasibility of the oxidation and reduction of selected organic peroxides and hydroperoxides at a glassy ...
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ON-ROAD EMISSION SAMPLING OF A HEAVY DUTY DIESEL VEHICLE FOR POLYCHLORINATED DIBENZO-P-DIOXINS AND POLYCHLORINATED DIBENZOFURANS |
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The first known program to characterize mobile heavy diesel vehicle emissions for polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDDs/Fs) during highway and ...
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ON-ROAD REMOTE SENSING OF AUTOMOBILE EMISSIONS IN THE RESEARCH TRIANGLE PARK, NORTH CAROLINA AREA: 1997-2001 |
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The report describes automobile exhaust remote sensing data collected by EPA at a number of sites in the Research Triangle Park, NC area during 1997. Data were also collected at on...
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ON-ROAD VEHICLE EMISSIONS: USA STUDIES |
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Several recent events in mobile sources emissions measurements have caused a major reassessment in the amounts of volatile organic compounds (VOC) and carbon monoxide (CO) in the a...
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ON-SITE PRODUCTION OF ACTIVATED CARBON FROM KRAFT BLACK LIQUOR |
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A pilot plant was designed and constructed to produce char via the St. Regis hydropyrolysis kraft chemical recovery process and to produce activated carbon from the char. This repo...
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ONLINE WATER QUALITY MONITORING AT EPA'S TEST AND EVALUATION FACILITY |
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Technical Brief describes NHSRC Water Infrastructure Division (WIPD) Test and Evaluation (T&E) Facility, Cincinnati, OH, research. The research projects include injecting more than...
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ONSITE ENGINEERING REPORT FOR SOLIDIFICATION/ STABILIZATION TREATMENT TESTING OF CONTAMINATED SOILS |
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The EPA's Office of Solid Waste and Emergency Response (OSWER) is currently developing land disposal restrictions (LDRs) for contaminated soil and debris (CS&D). The Office of Rese...
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ONSITE ENGINEERING REPORT FOR SOLIDIFICATION/STABILIZATION TREATMENT TESTING OF CONTAMINATED SOILS |
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A pilot-scale test of the S/S technology was conducted in Cincinnati, Ohio in coordination with IT Corporation and the University of Cincinnati. hree different hinders (portland ce...
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OPEN-PATH FTIR MEASUREMENTS OF NOX AND OTHER DIESEL EMISSIONS |
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The paper gives results of a demonstration of the feasibility of using an open-path Fourier transform infrared (OP-FTIR) monitoring technique to address the across-road characteriz...
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OPERATING CAPACITY OF GAC ADSORBERS - DISSOLVED OXYGEN AND EXTENDED SERVICE LIFE |
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The effect of molecular oxygen on the adsorptive capacity of activated carbon was evaluated in this study. t was determined that the capacity of granular activated carbon (GAC) for...
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OPERATION OF A SULFURIC ACID PLANT USING BLENDED COPPER SMELTER GASES |
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A high degree of control of SOx emissions at copper smelters can be obtained by blending reverberatory furnace gases with gases from roasters and converters and using the combined ...
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OPERATIONAL RESULTS FOR THE PISCATAWAY MODEL 5 MGD AWT PLANT |
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A 5 mgd tertiary wastewater treatment plant was constructed to demonstrate treatment of effluent from a 5 mgd step aeration activated sludge plant. The two-stage high lime process ...
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OPERATIONAL VARIABLES AND THE RELEASE OF COLONIZED GRANULAR ACTIVATED CARBON PARTICLES IN DRINKING WATER |
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Laboratory and field studies were conducted to determine the impact of granular activated carbon (GAC) drinking water filters and various operational variables on the release of po...
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OPTIMIZATION OF A PULSED LIMESTONE BED REACTOR AT THE ARGO TUNNEL IN IDAHO SPRINGS, COLORADO |
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Acid Mine Drainage (AMD) is an unintended consequence of coal and metal mining that adversely affects thousands of miles of streams both in the eastern and western regions of the U...
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OPTIMIZATION OF THERMAL OPTICAL ANALYSIS FOR THE MEASUREMENT OF BLACK CARBON IN REGIONAL PM2.5: A CHEMOMETRIC APPROACH |
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Thermal-optical analysis (TOA) is the principal method of the U.S. EPA's National Air Monitoring System for determining refractory carbon from combustion, or elemental carbon (EC)...
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OPTIMIZING COAGULATION-ADSORPTION FOR HALOFORM AND TOC (TOTAL ORGANIC CARBON) REDUCTION |
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This study examines the removal of organic matter from Mississippi River water by coagulation and softening processes and identifies the influence of operating parameters upon the ...
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OPTIMIZING GAC (GRANULAR ACTIVATED CARBON) SYSTEMS |
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Granular activated carbon (GAC) is an effective technique for removing synthetic organics from both ground and surface waters. Questions have been raised, however, over the cost of...
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ORAL TOXICITY OF CARBON TETRACHLORIDE: ACUTE, SUBACUTE, AND SUBCHRONIC STUDIES IN RATS |
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The investigation was conducted to characterize the acute, subacute and subchronic toxic potency of ingested carbon tetrachloride (CCl4). In the first acute and subchronic toxicity...
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ORGANIC ACIDITY IN MAINE (U.S.A.) LAKES AND IN HUMEX LAKE SKJERVATJERN (NORWAY) |
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Organic acids, a component of dissolved organic carbon can be a major factor in the acidity of many lakes and streams. n order to evaluate the importance of organic acidity, we fra...
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ORGANIC CARBON - A NONSPECIFIC WATER QUALITY INDICATOR FOR LAKE SUPERIOR |
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Organic matter is ubiquitous in surface waters and its presence is generally recognized as being detrimental to water quality. This paper is the first part of a study of the distri...
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ORGANIC CARBON AND SUSPENDED SEDIMENT DYNAMICS IN WESTERN LAKE SUPERIOR COASTAL WETLANDS |
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Little is known about the influence of loading of sediment and organic carbon on coastal wetlands fringing the Laurentian Great Lakes. In conjunction with our studies of nutrient ...
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ORGANIC CARBON ARTIFACT |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ORGANIC CARBON ARTIFACTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ORGANIC CARBON COMPOSITION IN NORTHERN SAN FRANCISCO BAY DURING LOW FRESHWATER FLOW CONDITIONS (POSTER SESSION) |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ORGANIC CARBON FRACTIONS IN O AND B HORIZON SOLUTIONS FROM A NEW ENGLAND SPODOSOL: EFFECTS OF ACID TREATMENT |
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We examined the effects of H2SO4 and HNO3 on dissolved organic carbon (DOC), pH, and DOC fractions in extracts from Spodosol O and B horizon samples of a forest soil from eastern M...
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ORGANIC CARBON PARTITIONING AS A BASIS FOR PREDICTING THE TOXICITY OF CHLORPYRIFOS IN SEDIMENTS |
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The objective of this study was to evaluate an organic carbon partitioning model for predicting bioavailability of the organophosphate chlorpyrifos in sediments, in support of the ...
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ORGANIC CARBON REMOVAL BY ADVANCED WASTE WATER TREATMENT PROCESSES |
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Fourteen physical-chemical processes singularly or in combination were evaluated for their ability to remove dissolved organic carbon in the effluent of a wastewater reclamation fa...
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ORGANIC CATION EFFECTS ON THE SORPTION OF METALS AND NEUTRAL ORGANIC COMPOUNDS ON AQUIFER MATERIAL (JOURNAL VERSION) |
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Sorption of ethylhexadecyldimethylammonium (EHDDMA+), a large organic cation, and three neutral organic compounds (NOC's) on two low organic carbon aquifer materials was studied us...
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ORGANIC COATING REMOVAL |
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Cleaner coating removal technologies are developing rapidly to meet a variety of industrial needs to replace solvent strippers having toxic properties. his guide describes cleaner ...
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ORGANIC CONTAMINANT REMOVAL IN LOWER MISSISSIPPI RIVER DRINKING WATER BY GRANULAR ACTIVATED CARBON ADSORPTION |
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The primary objective was to examine the efficiency of using granular activated carbon (GAC) for the removal of organic contaminants in drinking water. Two basic full-scale systems...
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ORGANIC EMISSIONS EVALUATION OF A PAINT BAKE OVEN WITH CATALYTIC INCINERATION |
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This report describes a test program conducted at a paint bake oven facility. The purpose was to measure total hydrocarbon (THC) concentrations at the inlet and outlet of an incine...
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ORGANIC EMISSIONS FROM IRON ORE SINTERING PLANTS: DETERMINATION OF CAUSES AND METHODS OF ABATEMENT |
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The report gives results of a laboratory study to develop basic information on the emission of organics from iron ore sinter beds. Samples of sinter bed mix components (including s...
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ORGANIC HALOGEN MEASUREMENT: CURRENT USES AND FUTURE PROSPECTS |
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Currently, the most popular method of analyzing total organic halide in water involves carbon adsorption, oxidative combustion, and measurement of the hydrogen halide by microcoulo...
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ORGANIC MATTER MANIPULATIONS HAVE LITTLE EFFECT ON GROSS AND NET NITROGEN TRANSFORMATIONS IN TWO TEMPERATE FOREST MINERAL SOILS IN THE USA AND CENTRAL EUROPE |
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Soil nitrogen transformations are intricately linked to carbon transformations. We utilized two existing organic matter manipulation sites in western Oregon, USA and Hungary to in...
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ORGANIC POLLUTANT SORPTION IN AQUATIC SYSTEMS |
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An understanding of sorption processes is an important key to describing pollutant fate in an aquatic system because sorption may alter significantly physical transport and chemica...
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ORGANIC WASTE CONTAMINATION INDICATORS IN SMALL GEORGIA PIEDMONT STREAMS |
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We monitored concentrations of nitrous oxide, methane, carbon dioxide, nutrients and other parameters (T, conductivity, dissolved oxygen, alkalinity, pH, DOC, DON, flow rate) in 17...
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ORGANIC WASTE CONTAMINATION INDICATORS IN SMALL GEORGIA PIEDMONT STREAMS |
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We monitored concentrations of dissolved organic carbon(DOC) and dissolved oxygen (DO), and other parameters in 17 small streams of the South Fork Broad River watershed on a monthl...
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ORGANONICKEL CHEMISTRY IN THE CATALYTIC HYDRODECHLORINATION OF POLYCHLOROBIPHENYLS (PCBS): LIGAND STERIC EFFECTS AND MOLECULAR STRUCTURE OF REACTION INTERMEDIATES. (R823526) |
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AbstractSoluble homogeneous organophosphorus¯¯nickel complexes have been used to detoxify polychlorinated biphenyls (PCBs) by catalyzed hydrodechlo...
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ORGANOPHOSPHORUS HYDROLASE-BASED AMPEROMETRIC SENSOR: MODULATION OF SENSITIVITY AND SUBSTRATE SELECTIVITY |
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The detection of organophosphate (OP) insecticides with nitrophenyl substituents is reported using an enzyme electrode composed of Organophosphorus Hydrolase (OPH) and albumin co...
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ORIGIN OF CARBONACEOUS PARTICLES IN AMERICAN CITIES: RESULTS OF RADIOCARBON 'DATING' AND CHEMICAL CHARACTERIZATION |
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During the past three years radiocarbon assay has emerged as a primary tool in the quantitative assignment of sources of urban and rural particulate pollution. Its use in several m...
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ORIGINS OF CARBONACEOUS AEROSOL IN DENVER AND ALBUQUERQUE DURING WINTER |
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Ambient aerosol measurements in wintertime Denver and Albuquerque show that volatile and elemental carbon constitute more than half of the observed total fine particle mass. A mult...
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OVERVIEW OF AVAILABLE TREATMENT TECHNIQUES FOR REMOVING ORGANICS FROM DRINKING WATER: COST AND PERFORMANCE EVALUATION |
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Recent amendments to the Safe Drinking Water Act have accelerated the requirements for development of Maximum Contaminant Levels (MCLs) and increased the number of contaminants tha...
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OVERVIEW OF THE 1999 ATLANTA SUPERSITE PROJECT |
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This paper presents an overview of the 1999 Atlanta Supersite Project coordinated through the Southern Oxidants Study and the Georgia Institute of Technology (GIT) and funded by th...
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OVERVIEW OF THE TECHNICAL IMPLICATIONS OF METHANOL AND ETHANOL AS HIGHWAY MOTOR VEHICLE FUELS |
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The characteristics of methanol and ethanol as highway motor vehicle fuels are contrasted with those of conventional gasolines and diesel fuels. he implications of the physical and...
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OVERVIEW OF TOXICOKINETIC ISSUES |
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Perflouroalkyl acids and related chemistries have physical chemical properties arising from the chemistry of the carbon-fluorine bond that differentiate their biological activity, ...
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OXIDATION AND DEVOLATILIZATION OF NITROGEN IN COAL CHAR |
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The paper gives results of a study of the reactions of organically bound nitrogen in coal char during combustion in a laboratory furnace using size-graded char particle prepared by...
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OXIDATION OF ALCOHOLS OVER FE3+/MONTMORILLONITE-K10 USING HYDROGEN PEROXIDE |
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Oxidation of various primary and secondary alcohols is studied in liquid phase at atmospheric pressure over Fe3+/montmorillonite-K10 catalyst prepared by ion-exchange method at a p...
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OXIDATION OF BIPHENYL BY A MULTICOMPONENT ENZYME SYSTEM FROM PSEUDOMONAS SP. STRAIN LB400 |
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Pseudomonas sp. strain LB400 grows on biphenyl as the sole carbon and energy source. This organism also cooxidizes several chlorinated biphenyl congeners. Biphenyl dioxygenase acti...
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OXIDATION OF BIPHENYL BY A MULTICOMPONENT ENZYME SYSTEM FROM PSEUDOMONAS SP. STRAIN LB400 |
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Pseudomonas sp. strain LB400 grows on biphenyl as the sole carbon and energy source. his organism also cooxidizes several chlorinated biphenyl congeners. iphenyl dioxygenase activi...
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OXIDATION OF PERSISTANT ENVIRONMENTAL POLLUTANTS BY A WHITE ROT FUNGUS |
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The white rot fungus Phanerochaete chrysosporium degraded DDT [1,1,-bis(4-chlorophenyl)-2,2,2-trichloroethane], 3,4,3',4'-tetrachlorobiphenyl, 2,4,5,2',-4',5'-hexachlorobiphenyl, 2...
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OXIDATIVE COUPLING OF PHENOLS ON ACTIVATED CARBON: IMPACT ON ADSORPTION EQUILIBRIUM |
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Previously reported results by the authors revealed that the presence of molecular oxygen (oxic conditions) in the test environment can, in some instances, cause an almost threefol...
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OXIDATIVE COUPLING OF PHENOLS ON THE GAC SURFACE |
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Previously reported results by the authors revealed that the presence of molecular oxygen (oxic conditions) in the test environment can, in some instances, cause an almost threefol...
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OXIDATIVE DEGRADATION OF ORGANIC ACIDS CONJUGATED WITH SULFITE OXIDATION IN FLUE GAS DESULFURIZATION |
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The report gives results of a study of organic acid degradation conjugated with sulfite oxidation under flue gas desulfurization (FGD) conditions. The oxidative degradation constan...
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OXIDATIVE STRESS AND LIPID MEDIATORS INDUCED IN ALVEOLAR MACHROPHAGES BY ULTRAFINE PARTICLES |
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In ambient aerosols, ultrafine particles (UFP) and their agglomerates are considered to be major factors contributing to adverse health effects. Reactivity of agglomerated UFP of e...
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OXIDATIVE TRANSFORMATIONS OF POLYCYCLIC AROMATIC HYDROCARBONS ADSORBED ON COAL FLY ASH |
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Polycyclic aromatic hydrocarbons adsorbed onto coal fly ash were found to be stabilized against photochemical decomposition. However, a number of adsorbed polycyclic aromatic hydro...
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OXYGEN TRANSFER THROUGH FLEXIBLE TUBING AND ITS EFFECTS ON GROUND WATER SAMPLING RESULTS (JOURNAL VERSION) |
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A model for the diffusion of gases through polymeric tubing was derived which predicts that the amount of gas transferred is proportional to the tubing length and inversely proport...
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OXYGEN-ACTIVATED SLUDGE PLANT COMPLETES TWO YEARS OF SUCCESSFUL OPERATION |
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A detailed report of the conversion to and operational performance of an oxygen-activated sludge system at the Westgate wastewater treatment plant in Fairfax County, Virginia, is g...
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OZIPM-3 (OZONE ISOPLETH PLOTTING WITH OPTIONAL MECHANISMS, VERSION 3) SOURCE CODE |
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A software package has been developed to enable a user to estimate EKMA control strategies using a new Carbon Bond Mechanism known as the CBM-X. The program is called Ozone Isoplet...
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OZONATION AND BIOLOGICAL STABILITY OF WATER IN AN OPERATING WATER TREATMENT PLANT |
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Ozonation of drinking water may adversely affect the biological stability of the inished water. his study was designed assess the effect of ozone as a preoxidant on the nutrient st...
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OZONATION/POST-CHLORINATION OF HUMIC ACID: A MODEL FOR PREDICTING DRINKING WATER DISINFECTION BY-PRODUCTS |
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Experiments were performed to evaluate disinfection by-products in model humic acid solutions which were ozonated at three different ozone to carbon levels and then chlorinated. he...
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OZONE AND NATURAL SYSTEMS: UNDERSTANDING EXPOSURE, RESPONSE, AND RISK |
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Research aimed at understanding the response of plants to ozone has been conducted for over four decades but little of it has addressed intact natural systems. Even so, there is s...
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OZONE DISINFECTION AND COLOR REMOVAL IN WASTEWATER |
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Various ozone contacting systems were evaluated. A sparger incorporated into a six-stage contacting system was found to be the most practical system. Over 80 percent ozone transfer...
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OZONE MULTI-YEAR PLAN |
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The tropospheric ozone research program addresses not only ozone, but other criteria pollutants such as SO2, nitrogen dioxide, carbon monoxide, and lead. It focuses on developing t...
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OZONE REACTION WITH N-ALDEHYDES (N=4-10), BENZALDEHYDE, ETHANOL, ISOPROPANOL, AND N-PROPANOL ADSORBED ON A DUAL-BED GRAPHITIZED CARBON/CARBON MOLECULAR SIEVE ADSORBENT CARTRIDGE |
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Ozone reacts with n-aldehydes (n = 4 - 10), benzaldehyde, ethanol, isopropanol, and n-propanol adsorbed on a dual-bed graphitized carbon/carbon molecular sieve adsorbent cartrid...
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OZONE STRESS AND CHANGES BELOW-GROUND: LINKING ROOT AND SOIL PROCESSES |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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OZONE UPTAKE IN AWAKE SPRAGUE-DAWLEY RATS |
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Knowledge of ozone (O3) uptake in rats is integral to efforts to quantitatively extrapolate animal data to man. The authors have measured percent uptake 30 adult Sprague Dawley rat...
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OZONE-GAC (GRANULAR ACTIVATED CARBON) FOLLOWING CONVENTIONAL U.S. DRINKING WATER TREATMENT |
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The combination of ozonation followed by granular activated carbon (GAC) has been suggested as a means to improve the cost effectiveness of the GAC process for organics removal. Se...
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Oligomers Formed Through In-cloud Metylglyoxal Reactions: Chemical Composition, Properties, and Mechanisms Investigated by Ultra-high Resolution FT-ICR Mass Spectrometry |
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Secondary organic aerosol (SOA) is a substantial component of total atmospheric organic particulate matter, but little is known about the composition of SOA formed through cloud pr...
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Organic Carbon as Inhibitor to SVOC and Metal Migration |
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The Safe Drinking Water Act (SDWA) authorizes the Underground Injection Control (UIC) program to protect underground drinking water (USDW) sources from contamination caused by unde...
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Organic Carbon as Inhibitor to SVOC and Metal Migration in Stormwater Drywells Discharging to the Subsurface-SLIDES |
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The Safe Drinking Water Act (SDWA) authorizes the Underground Injection Control (UIC) program to protect underground drinking water (USDW) sources from contamination caused by unde...
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Organic Carbon-water Column Concentration Quotients: Measuring Chemical Disequilibrium and Exploring the Impact of Black Carbon in Lake Michigan |
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When black carbon (bc) and biologically derived organic carbon (bioc) phases are present in sediments or suspended particulates, both forms of carbon act additively to sorb organic...
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Organic Matter Sources Supporting Lower Food Web Production in the Tidal Freshwater Portion of the York River Estuary, Virginia |
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This manuscript presents novel findings on the role of terrestrial organic carbon in an estuary ecosystem. We show that, contrary to current thinking, terrestrial carbon can suppo...
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PALLADIUM CATALYSIS FOR THE TREATMENT OF WATERS CONTAMINATED WITH HALOGENATED HYDROCARBONS, NONHALOGENATED AROMATICS, OXIDIZED CARBON, AND OXIDIZED NITROGEN SPECIES. (R825689C093) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PALLADIUM CATALYSIS FOR THE TREATMENT OF WATERS CONTAMINATED WITH HALOGENATED HYDROCARBONS, NONHALOGENATED AROMATICS, OXIDIZED CARBON, AND OXIDIZED NITROGEN SPECIES. (R828772) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PALLADIUM/MAGNESIUM CORROSION NANO-CELLS FOR PCB DECHLORINATION |
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Polychlorinated biphenyls (PCBs) are toxic and recalcitrant environment pollutants that are prevalent in nation's submarine sediments. PCBs bioaccumulate and progressively move up ...
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PAPER FIBERS AS A CARBON SOURCE FOR THE DE NOVO FORMATION OF POLYCHLORINATED DIOXINS AND FURANS |
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Formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzefurans (PCDDs/Fs) from carbons that were produced from pyrolysis of paper fibers and from a wood charcoal ...
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PARAMETRIC EVALUATION OF POWDERED ACTIVATED CARBON INJECTION FOR CONTROL OF MERCURY EMISSIONS FROM A MUNICIPAL WASTE COMBUSTOR |
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The paper gives results of a study at the Stanislaus County (California) municipal waste combustor (MWC) to determine the effects of carbon type, feed location, and feed rate on me...
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PARTIAL CHARACTERIZATION OF CHLORINATED ORGANICS IN SUPERCHLORINATED SEPTAGES AND MIXED SLUDGES |
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The chlorinated organic materials produced by applying the proprietary Purifax process to a septage and a mixed primary/secondary sludge were studied to assess the types, amounts, ...
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PARTICLE SPECIATION AND EMISSION PROFILES OF SMALL 2-STROKE ENGINES |
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The Human Exposure and Atmospheric Sciences Division (HEASD) conducts studies designed to acquire information from emission sources for use in source apportionment studies. The o...
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PARTICULATE ORGANIC CARBON MEASUREMENTS COLLECTED WITH LOW FLOW PERSONAL SAMPLERS |
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EPA's National Exposure Research Laboratory and the Research Triangle Institute (RTI) have conducted a particulate matter (PM) personal exposure study in Research Triangle Park, ...
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PARTITION COEFFICIENTS FOR METALS IN SURFACE WATER, SOIL, AND WASTE |
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This report presents metal partition coefficients for the surface water pathway and for the source model used in the Multimedia, Multi-pathway, Multi-receptor Exposure and Risk Ass...
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PARTITIONING OF SELECTED POLYCHLORINATED BIPHENYLS TO NATURAL SEDIMENTS |
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The partitioning of two polychlorinated biphenyl mixtures (Aroclor 1016 and 1242) and two tetrachlorobiphenyl isomers (2,5,3',4', and 2,6,2'6' tetrachlorobiphenyl) between water an...
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PARTITIONING OF WATER FLUX IN A SIERRA NEVADA PONDEROSA PINE PLANTATION. (R826601) |
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The weather patterns of the west side of the Sierra Nevada Mountains (cold, wet winters and hot, dry summers) strongly influence how water is partitioned between transpiration a...
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PARTITIONING STUDIES OF DIOXIN BETWEEN SEDIMENT AND WATER: THE MEASUREMENT OF KOC FOR LAKE ONTARIO |
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A desorption experiment is described in which the sediment-to-water partition coefficient for 2,3,7,8-tetrachlorodibenzo-p-dioxin is measured for a sample from Lake Ontario. fter a...
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PATTERNS OF NITROGEN AND CARBON STABLE ISOTOPE RATIOS IN MACROFUNGI, PLANTS AND SOILS IN TWO OLD-GROWTH CONIFER FORESTS |
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Natural abundance stable isotope ratios represent a potentially valuable tool for studying fungal ecology. We measured 15N and 13C in ectomycorrhizal and saprotrophic macrofungi...
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PATTERNS OF SOIL ORGANIC MATTER STABILIZATION IN A TRANSECT OF MATURE FORESTS IN THE PACIFIC NORTHWEST USA |
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Ecosystem soils influence the cycling of nutrients, movement and storage of water, and serve as an important global reservoir of carbon (C). The accumulation and storage of C in s...
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PCB CONGENERS AND HEXACHLOROBENZENE BIOTA SEDIMENT ACCUMULATING FACTORS FOR MACOMA NASUTA EXPOSED TO SEDIMENTS WITH DIFFERENT TOTAL ORGANIC CARBON CONTENTS |
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Deposit-feeding marine clams (Macoma nasuta) were exposed for 119d to three sediment types that varied in total organic carbon (TOC) from 0.8 to 2.5%. ediments were spiked with equ...
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PCB DECHLORINATION BY PD/MG BIMETALLIC CORROSION NANO-CELLS |
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Polychlorinated biphenyls (PCBs), manufacture-1970's for use as electrical insulators, were banned in 1979 due to their toxicity and persistence in the environment. They are recalc...
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PCDD AND PCDF EMISSIONS FROM SIMULATED SUGARCANE FIELD BURNING |
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The emissions from simulated sugarcane field burns were sampled and analyzed for polychlorinated dibenzodioxins and dibenzofurans (PCDDs and PCDFs). Sugarcane leaves from Hawaii an...
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PCDD/F FORMATION RATES FROM FLY ASH AND METHANE COMBUSTION CARBON SOURCES |
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The abstract discusses polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD,F) from fly ash and methane combustion carbon sources. (NOTE: PCDD,Fs are formed in t...
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PCDD/F and Aromatic Emissions from Simulated Forest and Grassland Fires |
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Emissions of polychlorinated dibenzodioxin and polychlorinated dibenzofuran (PCDD/F) from simulated grassland and forest fires were quantitatively sampled to derive emission factor...
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PD/MG BIMETALLIC CORROSION SYSTEMS FOR DECHLORINATION OF PCB CONTAMINATED MATRICES |
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Polychlorinated biphenyls (PCBs), a family of 209 compounds manufactured till mid70's, are toxic pollutants that persist in the environment. Enhanced corrosion of an active metal c...
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PERCEPTION OF ODOR AND NASAL PUNGENCY FROM HOMOLOGOUS SERIES OF VOLATILE ORGANIC COMPOUNDS |
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The paper discusses results of tests of nasal detection thresholds for airborne chemicals in a group of anosmics (i.e., subjects lacking a functional sense of smell) and in a group...
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PERFORMANCE AND COST OF MERCURY AND MULTIPOLLUTANT EMISSION CONTROL TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS |
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The report presents estimates of the performance and cost of both powdered activated carbon (PAC) and multipollutant control technologies that may be useful in controlling mercury ...
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PERFORMANCE AND COST OF MERCURY EMISSION CONTROL TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS |
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The report presents estimates of the performance and cost of powdered activated carbon (PAC) injection-based mercury control technologies and projections of costs for future applic...
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PERFORMANCE AND ECONOMIC FEASIBILITY OF A SLUDGE/WASTEPAPER GASIFIER SYSTEM |
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Thermal gasification of densified sludge/wastepaper fuels has been shown to be technically feasible for the co-disposal of sludge and source-separated wastepaper. The performance a...
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PERFORMANCE AUDIT OF INSPECTION AND MAINTENANCE CALIBRATION GASES |
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The purpose of the audit was to determine the accuracy of inspection and maintenance calibration gases for motor vehicle emission analyzers. Cylinders containing approximately 1.6 ...
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PERFORMANCE AUDIT RESULTS FOR POHC (PRINCIPLE ORGANIC HAZARDOUS CONSTITUENTS): VOST (VOLATILE ORGANIC SAMPLING TRAIN) AND GAS MEASUREMENT METHODS |
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This report includes the results of a pilot audit program on source emission measurement systems used to measure POHC (Principle Organic Hazardous Constituents). Four laboratories ...
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PERFORMANCE EVALUATION AT A LONG-TERM FOOD PROCESSING LAND TREATMENT SITE |
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The objective of this project was to determine the performance of a full scale, operating overland flow land (GEL) treatment system treating nonhazardous waste. Performance was eva...
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PERFORMANCE EVALUATION AT A LONG-TERM FOOD PROCESSING LAND TREATMENT SITE |
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The objective of this project was to determine the performance of a full scale, operating overland flow land (GEL) treatment system treating nonhazardous waste. Performance was eva...
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PERFORMANCE EVALUATION OF A CARBON-BASED REACTIVE BARRIER FOR NITRATE REMEDIATION |
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Nitrate (NO3-) is a common ground water contaminant related to agricultural activity, waste water disposal, leachate from landfills, septic systems, and industrial processes. This...
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PERFORMANCE OF ACTIVATED SLUDGE-POWDERED ACTIVATED CARBON-WET AIR REGENERATION SYSTEMS |
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The investigation summarized in this report was undertaken to evaluate the performance of powdered activated carbon (PAC) technology used in conjuntion with wet air regeneration (W...
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PERFORMANCE OF ACTIVATED SLUDGE-POWDERED ACTIVATED CARBON-WET AIR REGENERATION SYSTEMS |
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The investigation summarized in the report was undertaken to evaluate the performance of powdered activated carbon (PAC) technology used in conjunction with wet air regeneration (W...
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PERFORMANCE OF AIR STRIPPING AND GAC (GRANULAR ACTIVATED CARBON) FOR SOC (SYNTHETIC ORGANIC CHEMICAL) AND VOC (VOLATILE ORGANIC CHEMICAL) REMOVAL FROM GROUNDWATER |
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The study compares the ability and cost effectiveness of granular activated carbon and packed tower aeration (air stripping) in removing synthetic organic and volatile organic chem...
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PERFORMANCE OF LABORATORY FLOW-THROUGH COLUMN SYSTEMS SIMULATING DECHLORINATION OF TRICHLOROETHYLENE IN GROUND WATER BY A TREE MULCH BIOWALL |
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The U.S. Air Force has developed a novel remedial technology for treatment of ground water that is contaminated with chlorinated solvents. The contamination is treated in a reacti...
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PERFORMANCE OF RCRA (RESOURCE CONSERVATION AND RECOVERY ACT) METHOD 8280 FOR THE ANALYSIS OF DIBENZO-P-DIOXINS AND DIBENZOFURANS IN HAZARDOUS WASTE SAMPLES |
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Further evaluation of RCRA Method 8280 for the analysis of chlorinated dibenzo-p-dioxins and dibenzofurans has been performed. The Method has been modified to enable the quantitati...
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PERFORMANCE TEST RESULTS AND COMPARATIVE DATA FOR DESIGNATED REFERENCE METHODS FOR CARBON MONOXIDE |
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The U.S. Environmental Protection Agency designates specific ambient monitoring methods and analyzers as reference or equivalent methods acceptable for use in certain required moni...
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PERFORMANCE TESTING OF AIR CLEANING PRODUCTS |
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The paper discuses the application of the Environmental Technology Verification (ETV) Program for products that clean ventilation air to the problem of protecting buildings from ch...
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PERFORMANCE VERIFICATION OF ANIMAL WATER TREATMENT TECHNOLOGIES THROUGH EPA'S ENVIRONMENTAL TECHNOLOGY VERIFICATION PROGRAM |
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The U.S. Environmental Protection Agency created the Environmental Technology Verification Program (ETV) to further environmental protection by accelerating the commercialization o...
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PERINATAL EXPOSURE TO THE PHTHALATES DEHP, BBP AND DINP, BUT NOT DEP, DMP OR DOTP ALTERS SEXUAL DIFFERENTIATION OF THE MALE RAT |
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In mammals, exposure to antiandrogenic chemicals during sexual differentiation can produce malformations of the reproductive tract. Perinatal administration of AR antagonists like...
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PERIPHYTON PHOTOSYNTHESIS AS AN INDICATOR OF EFFLUENT TOXICITY: RELATIONSHIP TO EFFECTS ON ANIMAL TEST SPECIES |
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The use of aquatic plants in effluent toxicity evaluations is uncommon despite the availability of test methods and numerous recommendations for their use. It has been assumed that...
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PERMEABILITY OF POLYMERIC MEMBRANE LINING MATERIALS |
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Permeabilities to three gases (carbon dioxide, methane, and nitrogen), water vapor, and five solvents (methanol, acetone, cyclohexane, xylene, and chloroform) are reported for a br...
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PERMEABLE REACTIVE BARRIERS FOR IN-SITU TREATMENT OF ARSENIC-CONTAMINATED GROUNDWATER |
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Laboratory and field research has shown that permeable reactive barriers (PRBs)
containing a variety of materials can treat arsenic (As) contaminated groundwater. Sites where thes...
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PERMEABLE REACTIVE BARRIERS RESEARCH AT THE ENVIRONMENTAL PROTECTION AGENCY'S NATIONAL RISK MANAGEMENT RESEARCH LABORATORY |
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This presentation will provide an overview of research efforts at EPA on the application, monitoring, and performance of Permeable Reactive Barriers (PRBs) for groundwater restorat...
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PERMEATION OF MOUSE SKIN AND SILICONE RUBBER MEMBRANES BY PHENOLS: RELATIONSHIP TO IN VITRO PARTITIONING |
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Cutaneous permeability coefficients of a set of pollutants chosen to span a wide range or polarity; namely N-nitrosodimethylamine, benzidine, benzene, toluene, carbon tetrachloride...
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PEROXIDATION SYSTEMS, INC. - PEROX-PURE CHEMICAL OXIDATION TECHNOLOGY - APPLICATIONS ANALYSIS REPORT |
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This report evaluates the perox-pure chemical oxidation technology's ability to remove volatile organic compounds (VOC) and other organic contaminants present in liquid wastes. his...
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PERSONAL EXPOSURE TO PM2.5 MASS AND TRACE ELEMENTS IN BALTIMORE, MD, USA |
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In a recent study, EPA found significant relationships between PM2.5 mass measurements at a community site and personal exposure samples in a Towson, MD retirement facility. Thi...
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PERSONAL, INDOOR, AND OUTDOOR CONCENTRATIONS OF PM2.5, PARTICULATE NITRATE, AND ELEMENTAL CARBON FOR INDIVIDUALS WITH COPD IN LOS ANGELES, CA |
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This study characterizes the personal, indoor, and outdoor concentrations of PM2.5 and the major components of PM2.5, including nitrate (NO3-), elemental carbon (EC), and the ele...
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PERSPECTIVES IN CHRONOBIOLOGY OF AIR POLLUTION |
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In a series of experiments, male and female Sprague Dawley rats, kept in light (L) from 06 time in hours to 18 time in hours alternating with darkness (LD 12:12) inhaled different ...
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PERVAPORATION AND VAPOR PERMEATION MEMBRANE SYSTEMS FOR VOLATILE FERMENTATION PRODUCT RECOVERY AND DEHYDRATION |
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Historically, fermentation processes have been harnessed to produce commodity chemicals and fuels, such as ethanol. However, many of these chemicals are currently produced using oi...
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PESTICIDE SORPTION ON GEOLOGIC MATERIAL OF VARYING ORGANIC CARBON CONTENT (JOURNAL VERSION) |
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Sorption of three pesticides on geologic material ranging in organic carbon content from 0.33 to 6.9 g/kg was measured in soil columns using a miscible displacement technique. An o...
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PHASE BEHAVIOR OF THE REACTANTS, PRODUCTS AND CATALYSTS INVOLVED IN THE ALLYLIC EPOXIDATION OF TRANS-2-HEXEN-1-OL TO (2R,3R)-(+)-3-PROPYLOXIRAMETHANOL IN HIGH PRESSURE CARBON DIOXIDE. (R824731) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PHASE DISTRIBUTIONS OF LOW VOLATILITY ORGANICS IN AMBIENT AIR |
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Current strategies to control photochemical air pollution rely on abating the emission of volatile organic compounds. Primarily, these compounds exist in the vapor phase, and are t...
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PHENOXYACETIC ACID DEGRADATION BY THE 2,4-DICHLOROPHENOXYACETIC ACID (TFD) PATHWAY OF PLASMID PJP4: MAPPING AND CHARACTERIZATION OF THE TFD REGULATORY GENE |
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Plasmid pJP4 enables Alcaligenes eutrophus JMP134 to degrade 3-chlorobenzoate and 2,4-dichlorophenoxyacetic acid (TFD), Plasmid pROl0 is a derivative of pJP4 obtained by insertion ...
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PHENOXYACETIC ACID DEGRADATION BY THE 2,4-DICHLOROPHENOXYACETIC ACID (TFD) PATHWAY TO PLASMID PJP4: MAPPING AND CHARACTERIZATION OF THE TFD REGULATORY GENE, TFDR |
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Plasmid pJP4 enables Alcaligenes eutrophys JMP134 to dedegrade 3-chlorobenzoate and 2,4-dichlorophenoxyacetic acid (TFD). lasmid pR0101 is a derivative of pJP4 obtained by insertio...
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PHENOXYALKANOIC ACID HERBICIDES IN MUNICIPAL LANDFILL LEACHATES |
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Analysis of leachates from six U.S. municipal landfills revealed the presence of chlorinated 2-phenoxypropionic acid herbicides; however, none of the more widely used acetic acid a...
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PHOSGENE FORMATION FROM ADSORPTION OF CARBON TETRACHLORIDE ON OXYGEN MODIFIED IR (111). (R826694C626) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PHOSGENE FORMATION FROM ADSORPTION OF CARBON TETRACHLORIDE ON OXYGEN MODIFIED IR(111). (R828598C802) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PHOSPHOLIPID AND FDA ACTIVITY MEASUREMENTS ADAPTED TO BIOLOGICAL GAC |
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Established microbial ecology analytical techniques for measuring the quantity and activity of bacteria were examined for use on biological granular activated carbon (GAC). ctivity...
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PHOTO-INDUCED POLYCYCLIC AROMATIC HYDROCARBON TOXIC POTENTIALS OF NEAR SHORE LARVAL FISH HABITAT IN THE GREAT LAKES, USA |
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Photo-induced toxicity (PIT) of polycyclic aromatic hydrocarbons (PAH) has been documented in laboratory studies for both invertebrate and vertebrate aquatic organisms. PIT has not...
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PHOTOACOUSTIC DETECTION OF PARTICULATE CARBON |
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A photoacoustic technique for the mass monitoring of carbonaceous aerosols deposited on filter substrates has been developed. The technique involves the use of a specially designed...
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PHOTOACOUSTIC DETERMINATION OF OPTICAL PROPERTIES OF AEROSOL PARTICLES COLLECTED ON FILTERS: DEVELOPMENT OF A METHOD TAKING INTO ACCOUNT SUBSTRATE REFLECTIVITY |
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The absorptivity and imaginary index of refraction for carbon and methylene blue particles were inferred from the photoacoustic spectra of samples collected on Teflon filter substr...
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PHOTOACTIVATION AND TOXICITY OF MIXTURES OF POLYCYCLIC AROMATIC HYDROCARBON COMPOUNDS IN MARINE SEDIMENT |
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The direct toxicity and photoinduced toxicity of sediment-associated acenaphthene, phenanthrene, fluoranthene, and pyrene were determined for the marine amphipod Rhepoxynius abroni...
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PHOTOCHEMICAL AEROSOL DYNAMICS |
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New data are reported on (1) the rate of formation of condensable chemical species by photochemical reactions, (2) the effect of the reaction products on the particle size distribu...
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PHOTOCHEMICAL ALTERATION OF DISSOLVED ORGANIC MATTER: EFFECTS ON THE CONCENTRATION AND ACIDITIES OF IONIZABLE SITES IN DISSOLVED ORGANIC MATTER IN THE SATILLA RIVER OF GEORGIA, USA |
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The acid-base properties of humic substances, the major component of dissolved organic matter (DOM), area major control on the alkalinity, or acid neutralizing capacity of freshwat...
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PHOTOCHEMICAL AND BIOLOGICAL DEGRADATION OF CDOM IN WATERS FROM SELECTED COASTAL REGIONS OF THE SOUTHEASTERN UNITED STATES |
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Biological and photochemical degradation of colored dissolved organic matter (CDOM) were investigated in controlled experiments using waters from southeastern U.S. estuaries, from ...
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PHOTOCHEMICAL EFFECTS ON NOX AND CO EMISSIONS IN A BRAZILIAN SAVANNA |
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Land clearing and burning in the tropics often results in increased solar irradiation of soil and surface organic matter. This increased light exposure may impact the emissions of...
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PHOTOCHEMICAL OXIDANT FORMATION: OVERVIEW OF CURRENT KNOWLEDGE AND EMERGING ISSUES |
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Despite 1-1/2 decades of control effort, the photochemical ozone problem continues to plague human society and ecology in the U.S. One reason alleged for the difficulty in achievin...
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PHOTOCHEMICAL PRODUCTION OF DISSOLVED INORGANIC CARBON FROM TERRESTRIAL ORGANIC MATTER: SIGNIFICANCE TO THE OCEANIC ORGANIC CARBON CYCLE |
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Water collected from riverine, near coastal, and salt marsh sources in the Southeastern United States was evaluated for its ability to produce both carbon monoxide (CO) and dissolv...
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PHOTOCHEMICAL TRANSFORMATIONS OF DISSOLVED ORGANIC MATTER IN A BLACKWATER RIVER |
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We examined photochemical alterations of dissolved organic matter (DOM) from the Satilla River, a high DOC (10-40 mg/liter) blackwater river of southeast Georgia. Water samples we...
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PHOTOCHEMICALLY-INDUCED ALTERATION OF STABLE CARBON ISOTOPE RATIOS (DELTA C-13) IN TERRIGENOUS DISSOLVED ORGANIC CARBON |
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Exposure of riverine waters to natural sunlight initiated alterations in stable carbon isotope ratios (delta C-13) of the associated dissolved organic carbon (DOC). Water samples w...
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PHOTOCHEMICALLY-INDUCED TRANSFORMATIONS OF DISSOLVED ORGANIC MATTER IN RIVERINE WATERS |
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We demonstrated that exposure of riverine water to natural sunlight initiated degradation and corresponding alteration to the stable carbon isotope ratio and biochemical compositio...
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PHOTOCHEMISTRY OF AQUEOUS IRON (III)-POLYCARBOXYLATE COMPLEXES: ROLES IN THE CHEMISTRY OF ATMOSPHERIC AND SURFACE WATERS |
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Photochemical redox reactions of FE(III) complexes of polycarboxylates (e.g., citrate, malonate, oxalate) occur on time scales o:: minutes in sunlight and are potentially important...
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PHOTOCHEMISTRY OF SOME NATURALLY EMITTED HYDROCARBONS |
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Six C10H16 monoterpenes, p-cymene, and isoprene, all known or thought to be emitted to the atmosphere by vegetation, were irradiated in the presence of NOx. The terpenes studied in...
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PHOTOLYSIS OF CHLORINATED DIOXINS IN ORGANIC SOLVENTS AND ON SOILS |
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Photoreduction of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) to 2,3,7-trichloro-2-dioxin (TrCDD) in isooctane was found to account for approximately 10 of the loss of TCDD and is t...
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PHOTOOXIDATION AND ITS EFFECTS ON THE CARBOXYL CONTENT OF DISSOLVED ORGANIC MATTER IN TWO COASTAL RIVERS IN THE SOUTHEASTERN UNITED STATES |
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Photodecarboxylation (often stoichiometrically expressed as RCOOH + (1/2)O2 (ROH + CO2) has long been postulated to be principally responsible for generating CO2 from photooxidatio...
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PHOTOREACTIONS IN SURFACE WATERS AND THEIR ROLE IN BIOGEOCHEMICAL CYCLES |
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During the past decade significant interest has developed in the influence of photochemical reactions on biogeochemical cycles in surface waters of lakes and the sea. A major port...
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PHOTOSOLVOLYSIS OF 3,4-DICHLOROANILINE IN WATER: EVIDENCE FOR AN ARYL CATION INTERMEDIATE |
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Irradiation of 3,4-dichloroaniline in water (lambda > 290nm) gave 2-chloro-5-aminophenol with a conversion of 78 plus or minus 5%. The photolysis quantum yield at 313nm of 0.05 plu...
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PHOTOSYNTHESIS, CARBON ALLOCATION, AND GROWTH OF SULFUR DIOXIDE ECOTYPES OF 'GERANIUM CAROLINIANUM' L |
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The study investigated ways in which genetically determined differences in SO2 susceptibility resulting from ecotypic differentiation in Geranium carolinianum were expressed physio...
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PHOTOTHERMAL DESTRUCTION OF THE VAPOR OF VOLATILE ORGANIC COMPOUNDS |
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The contamination of subsurface soil and groundwater by volatile organic compounds (VOCS) is a pervasive problem in the United States. n-situ soil vapor extraction (SVE) and ex-sit...
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PHYLOGENETIC ANALYSIS OF A BACTERIAL AEROBIC DEGRADER OF AZO DYES |
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Eubacterial consensus oligonucleotide primers were used to amplify by polymerase chain reaction the nearly full-length 16S rRNA gene of isolate C7, a gram-negative rod capable of a...
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PHYSICAL CHEMICAL TREATMENT OF A COMBINED SEWER IMPACTED SECONDARY EFFLUENT |
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Physical-chemical treatment of conventional biological secondary effluent for the removal of organic and inorganic pollutants is used and considered applicable in areas where secon...
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PHYSICAL REMOVAL OF MICROBIAL CONTAMINANTS IN DRINKING WATER – WATTS PREMIER INC. WP-4V DRINKING WATER TREATMENT SYSTEM |
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The Watts Premier WP-4V four-stage POU RO system was tested for removal of bacteria and viruses at NSF’s Drinking Water Treatment Systems Laboratory. Five systems were challenged ...
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PHYSICAL, CHEMICAL AND BIOLOGICAL CONDITIONS OF THE SAGAVANIRKTOK RIVER AND NEARBY CONTROL STREAMS, SHAVIOVIK AND CANNING RIVERS |
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Biological, physical and chemical data were collected from 28 stations on the Sagavanirktok River and five of its tributaries, the Canning River, Shaviovik River, two tundra lakes ...
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PHYSICAL-CHEMICAL TREATMENT OF A MUNICIPAL WASTEWATER USING POWDERED CARBON. NO. II |
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Salt Lake City municipal wastewater was treated in a nominal 100 gpm pilot plant by chemical coagulation-precipitation, powdered activated carbon adsorption and granular media filt...
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PHYSICAL/CHEMICAL TREATMENT OF BLAST FURNACE WASTEWATERS USING MOBILE PILOT UNITS |
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The report documents an in-depth pilot-plant investigation of the applicability of advanced waste treatment methods for upgrading ironmaking blast furnace wastewaters to Best Avail...
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PHYSICAL/CHEMICAL TREATMENT OF COKE PLANT WASTEWATER |
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The report documents a pilot-plant study of the use of advanced waste treatment methods in upgrading metallurgical cokemaking wastewaters to Best Available Technology (BAT) levels....
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PHYSICAL/CHEMICAL TREATMENT OF TEXTILE FINISHING WASTEWATER FOR PROCESS REUSE |
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The report describes a demonstration of multimedia filtration as an effective tertiary treatment for biologically treated textile wastewaters from two adjacent plants involved in d...
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PHYSICOCHEMICAL PROPERTIES AS PREDICTORS OF ORGANIC CHEMICAL EFFECTS ON SOIL MICROBIAL RESPIRATION |
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Structure-activity analysis was used to evaluate the effects of 19 hazardous organic chemicals on microbial respiration in two slightly acidic soils (a Captina silt loam from Roane...
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PHYSIO-CHEMICAL CHARACTERIZATION OF IRON TUBERCULATION FROM A SINGLE DRINKING WATER DISTRIBUTION SYSTEM |
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Corrosion of iron pipes in Drinking Water Distribution Systems (DWDS) contributes to the formation of tubercles whose physio-chemical properties are influenced by the composition o...
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PHYSIOLOGICAL AND GROWTH RESPONSES OF DIFFERENTIALLY IRRIGATED COTTON TO OZONE (JOURNAL VERSION) |
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The study was conducted to determine the physiological and growth responses of cotton (Gossypium hirsutum L.) to the interaction of ozone (O3) and drought stress. Cotton (cv SJ-2) ...
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PHYSIOLOGICAL ECOLOGY OF CLOSTRIDIUM GLYCOLICUM RD-1, AN AEROTOLERANT ACETOGEN ISOLATED FROM SEA GRASS ROOTS |
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An anaerobic, H2-utilizing bacterium, strain RD-1, was isolated from the highest growth-positive dilution series of a root homogenate prepared from the sea grass Halodule wrightii....
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PHYSIOLOGICAL PROPERTIES AND SUBSTRATE SPECIFICITY OF A PENTACHLOROPHENOL-DEGRADING PSEUDOMONAS SPECIES |
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Isolation of a bacterial strain capable of utilizing pentachlorophenol (PCP) as sole source of carbon and energy for growth was facilitated by using enrichment cultures inoculated ...
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PHYSIOLOGICALLY BASED PHARMACOKINETIC ESTIMATED METABOLIC CONSTANTS AND HEPATOTOXICITY OF CARBON TETRACHLORIDE AFTER METHANOL PRETREATMENT IN RATS |
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NO ABSTRACT PROVIDED...
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PHYSIOLOGY-BASED GAP MODEL OF FOREST DYNAMICS |
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A computer model of forest growth is presented. he model, HYBRID is derived from a forest gap model, an ecosystem process model, and a photosynthesis model. n HYBRID individual tre...
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PHYTOPLANKTON DEPOSITION TO CHESAPEAKE BAY SEDIMENTS DURING WINTER-SPRING |
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The often rapid deposition of phytoplankton to sediments at the conclusion of the spring phytoplankton bloom is an important component of benthic-pelagic coupling in temperate and ...
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PHYTOPLANKTON-AND DETRITUS-BASED FOOD WEBS IN GULF OF MEXICO ESTUARIERS: LESSONS FROM PENSACOLA BAY FL, USA |
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A central theme in estuarine ecology is understanding the connection between riverine delivery of nutrients and organic matter and how these materials are processed within the estu...
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PHYTOTOXICITY OF THREE SUBMERGED AQUATIC MACROPHYTE SPECIES TO COPPER AND ATRAZINE UNDER HIGH AND LOW NUTRIENT CONCENTRATIONS |
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The effects of anthropogenic contaminants on Gulf of Mexico plant communities are poorly understood despite the declining number of seagrass communities and wetland habitats. This...
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PILOT PLANT EXPLORATION OF SLOW RATE FILTRATION |
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Alternatives to conventional coagulation water filtration plants (those that utilize coagulation, flocculation, sedimentation and filtration) may be appropriate for some small wate...
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PILOT PLANT PROJECT FOR REMOVING ORGANIC SUBSTANCES FROM DRINKING WATER |
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This report describes research on the European practice of preozonation of water to modify naturally occurring organics, followed by bacteria activated carbon (BAC) adsorption to r...
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PILOT PLANT STUDY ON THE USE OF CHLORINE DIOXIDE AND GRANULAR ACTIVATED CARBON |
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Chlorine dioxide is shown to be an effective disinfectant and its use allowed a 30-40% reduction in trihalomethane precursors in this pilot plant study in Evansville, Ind. Granular...
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PILOT SCALE EVALUATION OF BIOLOGICAL ACTIVATED CARBON FOR THE REMOVAL OF THM PRECURSORS |
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This project evaluates a method for the removal of trihalomethane (THM) precursors from surface water sources. A pilot plant was operated for 80 weeks to test the combination of oz...
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PILOT-PLANT INVESTIGATIONS OF THE ADSORPTION OF 1,2-DICHLOROETHANE AND 1,2-DIBROMO-3-CHLOROPROPANE FROM WATER SUPPLIES |
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This research considers the results of granular activated carbon (GAC) pilot-plant studies related to the adsorption of an industrial solvent and a pesticide, namely, 1,2-dichloroe...
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PILOT-PLANT STUDIES OF SLOW-RATE FILTRATION |
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Alternatives to conventional coagulation water filtration plants (those that utilize coagulation, flocculation, sedimentation and filtration) may be appropriate for some small wate...
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PILOT-SCALE DEVELOPMENT OF A LOW-NOX COAL-FIRED TANGENTIAL SYSTEM |
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A 293 kWt (1 million Btu/hr) pilot-scale facility was used to develop a low-NOx pulverized-coal-fired tangential system. Conventional tangential system burner and vortex characteri...
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PILOT-SCALE EVALUATION OF THE POTENTIAL FOR EMISSIONS OF HAZARDOUS AIR POLLUTANTS FROM COMBUSTION OF TIRE-DERIVED FUEL |
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The report gives results of experiments in a 73-kW (250,000-Btu/hr) rotary kiln incinerator simulator to examine and characterize emissions from incineration of scrap tire material...
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PILOT-SCALE STUDIES ON THE INCINERATION OF ELECTRONICS INDUSTRY WASTE |
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The paper describes experiments performed on a pilot-scale rotary kiln incinerator to investigate the emissions and operational behavior during the incineration of consumer electro...
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PILOT-SCALE SUBCRITICAL WATER REMEDIATION OF POLYCYCLIC AROMATIC HYDROCARBON- AND PESTICIDE-CONTAMINATED SOIL. (R825394) |
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Subcritical water (hot water under enough pressure to maintain the liquid
state) was used to remove polycyclic aromatic hydrocarbons (PAHs) and pesticides
from highly co...
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PLANETARY METABOLISM: UNDERSTANDING THE CARBON CYCLE |
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Biological systems are intimately involved in the transfers of energy and materials around our planet, affecting the geochemistry and other physical properties of the atmosphere, t...
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PLANNING AND IMPLEMENTING A REAL-TIME AIR POLLUTION MONITORING AND OUTREACH PROGRAM FOR YOUR COMMUNITY: THE AIRBEAT PROJECT OF ROXBURY, MASSACHUSETTS |
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EPA has developed a technology transfer handbook for the EMPACT Roxbury Air Monitoring (AirBeat) Project. The purpose of AirBeat is to make real-time air quality monitoring informa...
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PLANT RESPONSE TO AIR POLLUTION |
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Air pollutants have a negative impact on plant growth, primarily through interfering with resource accumulation. ince leaves are in close contact with the atmosphere, many air poll...
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PLANT STRESS DETECTION BY REMOTE MEASUREMENT OF FLUORESCENCE |
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Plant growth and development are based on the capture and transformation of electromagnetic radiation by chlorophyll. The efficiency of photosynthesis depends upon the presence of ...
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PM AMBIENT METHODS RESEARCH, ORD CARBON - STATUS REPORT |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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PM2.5 ORGANIC COMPOSITION FROM SEVERAL SITES IN THE UNITED STATES |
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Organic constituents make up an important component of fine particulate matter (PM2.5) in ambient environments. While part of the composition of organic aerosol results from emi...
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PMHOME: A DATABASE OF CONTINUOUS PARTICLE MEASUREMENTS IN AN OCCUPIED HOUSE OVER A FOUR-YEAR PERIOD |
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Although considerable data exist on 24-hour integrated measurements of fine and coarse particles indoors, much less information is available on moment-to-moment variation for a f...
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POINT-OF-ENTRY DRINKING WATER TREATMENT SYSTEMS FOR SUPERFUND APPLICATIONS |
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The U.S. Environmental Protection AGency (EPA) and State Superfund agencies need a technical assistance manualto assist their personnel in the selection of an effective drinking wa...
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POINT-OF-ENTRY DRINKING WATER TREATMENT SYSTEMS FOR SUPERFUND APPLICATIONS |
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The U.S. Environmental Protection AGency (EPA) and State Superfund agencies need a technical assistance manualto assist their personnel in the selection of an effective drinking wa...
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POLAR ORGANIC OXYGENATES IN PM2.5 AT A SOUTHEASTERN SITE IN THE UNITED STATES |
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A field study was undertaken in Research Triangle Park, NC, USA, during the summer of 2000 to identify classes of polar oxygenates in PM2.5 containing carbonyl and/or hydroxyl func...
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POLLUTANT SORPTION IN ENVIRONMENTAL SYSTEMS |
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The development of mathematical models of sorptive processes affecting pollutant fate in aquatic systems is reviewed. The review discusses research on equilibrium sorption (partiti...
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POLLUTANT VARIABILITY IN THE REGIONAL AIR POLLUTION STUDY |
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Pollutant variability in the area represented by a stationary point monitoring site causes an uncertainty in representative sampling. This uncertainty has been determined for selec...
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POLLUTANTS FROM SYNTHETIC FUELS PRODUCTION: ENVIRONMENTAL EVALUATION OF COAL GASIFICATION SCREENING TESTS |
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The report gives results of an environmental evaluation of 38 screening test runs using a laboratory-scale, fixed-bed coal gasifier to study pollutants generated during the gasific...
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POLLUTION CONTROL FOR UTILITY POWER GENERATION, 1990-2020 |
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The paper discusses pollution control for utility power generation between the years 1990 and 2020, when the major anticipated environmental challenges facing the utility industry ...
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POLLUTION PREVENTION ASSESSMENT FOR A MANUFACTURER OF BOURBON WHISKEY (EPA/600/S-95/010 |
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The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack ...
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POLLUTION PREVENTION OPPORTUNITY ASSESSMENT - U.S. POSTAL INSPECTION SERVICE FORENSIC & TECHNICAL SERVICES DIVISION - NATIONAL FORENSIC LABORATORY, DULLES, VIRGINIA |
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The United States Postal Service (USPS) in cooperation with EPA's National Risk Management Research Laboratory (NRMRL) is engaged in an effort to integrate waste prevention and rec...
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POLY(VINYL ACETATE) AND POLY(VINYL ACETATE-CO-ETHYLENE) LATEXES VIA DISPERSION POLYMERIZATIONS IN CARBON DIOXIDE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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POLYCHLORINATED BIPHENYL CONGENER DISTRIBUTIONS IN WINTER FLOUNDER AS RELATED TO GENDER, SPAWNING SITE, AND CONGENER METABOLISM |
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Concentrations of 17 polychlorinated biphenyl (PCB) congeners were measured in liver of gonadally mature winter flounder collected from Fox Island and Gaspee Point, RI, and from Ne...
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POLYCHLORINATED BIPHENYLS AS INDUCERS OF HEPATIC MICROSOMAL ENZYMES: EFFECTS OF DI-ORTHO SUBSTITUTION |
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All of the 13 possible polychlorinated biphenyl (PCB) isomers and congeners substituted at both para positions, at least two meta positions (but not necessarily on the same ring) a...
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POLYCHLORINATED DIOXIN AND FURAN DISCHARGE DURING CARBON REACTIVATION (JOURNAL VERSION) |
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Analyses are performed on samples collected from various effluent streams of a fluidized-bed and infrared furnace during reactivation of granular activated carbon (GAC) used in tre...
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POLYCYCLIC AROMATIC HYDROCARBON FORMATION IN OPPOSED FLOW DIFFUSION FLAMES OF ETHANE. (R825412) |
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AbstractThe effect of fuel-side carbon density on the levels of polycyclic aromatic hydrocarbon (PAH) formation in atmospheric pressure, opposed flow, ethane diffusion ...
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POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) AND OTHER SEMI-VOLATILE ORGANIC COMPOUNDS COLLECTED IN NEW YORK CITY IN RESPONSE TO THE EVENTS OF 9/11 |
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Concentrations of over 60 non-polar semi-volatile and non-volatile organic compounds were measured in Lower Manhattan, New York using a high capacity Integrated Organic Gas and P...
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POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) AND OTHER SEMI-VOLATILE ORGANIC COMPOUNDS COLLECTED IN NEW YORK CITY IN RESPONSE TO THE EVENTS OF 9/11 |
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Concentrations of over 60 non-polar semi-volatile and non-volatile organic compounds were measured in Lower Manhattan, New York using a high capacity Integrated Organic Gas and P...
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POLYCYLIC AROMATIC HYDROCARBONS (PAHS) AND OTHER SEMI-VOLATILE ORGANIC COMPOUNDS COLLECTED IN NEW YORK CITY IN RESPONSE TO THE EVENTS OF 9/11 |
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Concentrations of over 60 non-polar semi-volatile and non-volatile organic compounds were measured in Lower Manhattan, New York using a high capacity Integrated Organic Gas an Pa...
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POOLS AND FLUXES OF BIOGENIC CARBON IN THE FORMER SOVIET UNION |
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The former Soviet union (FSU) was the largest country in the world. t occupied one-sixth of the land surface of the Earth. n understanding of the pools and f luxes of biogenic carb...
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PORE STRUCTURE OF SOOT DEPOSITS FROM SEVERAL COMBUSTION SOURCES. (R825303) |
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AbstractSoot was harvested from five combustion sources: a dodecane flame, marine and bus diesel engines, a wood stove, and an oil furnace. The soots ranged from 20% to...
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POREWATER TOXICITY TESTING: AN OVERVIEW |
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Sediments act as sinks for contaminants, where they may build up to toxic levels. Sediments containing toxic levels of contaminants pose a risk to aquatic life, human health, and w...
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POSSIBLE RELATIONSHIP OF SUDDEN INFANT DEATH SYNDROME TO INDOOR AIR QUALITY |
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Sudden Infant Death Syndrome (SIDS) has been associated with higher rates of maternal smoking and higher body lead content of SIDS victims compared to control infants, matched for ...
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POST-MORTEM FINDINGS ON THE PERFORMANCE OF ENGINEERED SRB FIELD-BIOREACTORS FOR ACID MINE DRAINAGE CONTROL |
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Sulphate-reducing bacteria (SRB) have the ability to immobilize dissolved metals by precipitating them as sulphides, provided that a favourable biochemical environment is created. ...
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POTASSIUM PERMANGANATE AND CLINOPTILOLITE ZEOLITE FOR IN SITU TREATMENT OF GROUND WATER CONTAMINATED WITH LANDFILL LEACHATE: LABORATORY STUDY |
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There are tens of thousands of closed landfills in the United States, many of whicih are unlined and sited on alluvial deposits. Landfills are of concern because leachate contains...
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POTENTIAL CARBON BENEFITS OF THE CONSERVATION RESERVE PROGRAM IN THE UNITED STATES |
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NO ABSTRACT PROVIDED...
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POTENTIAL CARBON FLUX FROM TIMBER HARVESTS AND MANAGEMENT IN THE CONTEXT OF A GLOBAL TIMBER MARKET. (R826616) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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POTENTIAL CARBON SEQUESTRATION BY AFFORESTATION OF PASTURE IN THE SOUTH-CENTRAL UNITED STATES |
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NO ABSTRACT PROVIDED...
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POTENTIAL EFFECT OF NO-TILL MANAGEMENT ON CARBON IN THE AGRICULTURAL SOILS OF THE FORMER SOVIET UNION |
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Agricultural soils act as both a source and a sink for atmospheric carbon. ince the onset of cultivation, the 211.5 million ha of agricultural soils in the former Soviet Union (OSU...
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POTENTIAL EFFECTS OF ELEVATED CO2 AND O3 ON SOIL MICROBIOTA IN PONDEROSA PINE MESOCOSMS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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POTENTIAL ENVIRONMENTAL PROBLEMS OF ENHANCED OIL AND GAS RECOVERY TECHNIQUES |
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This report provides: (a) an identification of and analysis of available data regarding EOR/EGR related pollutants; (b) an assessment of potential environmental impacts and an iden...
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POTENTIAL IMPACTS OF ORGANIC WASTES ON SMALL STREAM WATER QUALITY |
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We monitored concentrations of dissolved organic carbon (DOC), dissolved oxygen (DO) and other parameters in 17 small streams of the South Fork Broad River (SFBR) watershed on a mo...
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POTENTIAL OF FORESTRY AND AGROFORESTRY PRACTICES TO STORE CARBON IN THE TROPICS |
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Terrestrial vegetation plays a pivotal role in the global carbon cycle. ot only are tremendous amounts of. carbon stored in terrestrial egetation, but large amounts are also active...
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POTENTIATION OF CARBON TETRACHLORIDE HEPATOTOXICITY BY INHALED METHANOL:TIME COURSE INJURY AND RECOVERY |
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Increases in the use of methanol (MeOH) as a transportation fuel would result in greater potential for inhalation exposure. ecause oral exposure to MeOH potentates the hepatotoxici...
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POWDERED ACTIVATED CARBON ADSORPTION ISOTHERMS FOR SELECTED TANNERY EFFLUENTS |
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Two raw untreated tanning effluents were initially tested for the removal of COD, BOD, TOC, total and specific phenols, oil and grease, and total chromium, using the following six ...
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PRACTICAL APPLICATIONS FROM OBSERVATIONS OF MERCURY OXIDATION AND BINDING MECHANISMS |
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This paper describes a bench-scale program at the U.S. EPA. The goals of this program are to (a) isolate individual mechanisms of elemental mercury oxidation and oxidized mercury ...
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PRACTICAL COMPUTER MODELING FOR GAC APPLICATION |
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USEPA's present method of determining carbon use rates to support the Safe Drinking Water Act is explained and evaluated....
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PRECOLUMN SAMPLE ENRICHMENT DEVICE FOR ANALYSIS OF AMBIENT VOLATILE ORGANICS BY GAS CHROMATOGRAPHY-MASS SPECTROMETRY |
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Gas chromatographic-mass spectrometric (GC/MS) identification of air pollutants generally requires a preconcentration step to provide sufficient sample for analysis. Cryogenic trap...
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PREDICTED IMPACTS OF ELEVATED TEMPERATURE ON THE MAGNATUDE OF THE WINTER-SPRING PHYTOPLANKTON BLOOM IN TEMPERATE COASTAL WATERS: A MESOCOSM STUDY |
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An experiment was conducted with six 13-m3 land-based mesocosms (5 m deep) in December 1996/February 1997 to address the impact of increased temperature on the trophic structure of...
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PREDICTING BIOACCUMULATION POTENTIAL: A TEST OF A FUGACITY-BASED MODEL |
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Clams (Macoma nasuta) from an unpolluted site in Yaquina Bay, regon were exposed in the laboratory for 28 days to 6 field-contaminated sediments (treatments) which varied widely in...
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PREDICTING EQUILIBRIA FOR SINGLE SOLUTE AND MULTICOMPONENT AQUEOUS-PHASE ADSORPTION ONTO ACTIVATED CARBON |
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Granular activated carbon (GAC) is useful for removing potentially harmful synthetic organic chemical (SOCs) found in drinking water sources. In the design of fixed-bed contacters,...
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PREDICTING PREFERENTIAL ADSORPTION OF ORGANICS BY ACTIVATED CARBON |
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Preferential adsorption of organic compounds onto activated carbon from dilute aqueous solutions was studied to develop a comprehensive theoretical basis for predicting adsorption ...
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PREDICTING SEDIMENT METAL TOXICITY USING A SEDIMENT BIOTIC LIGAND MODEL: METHODOLOGY AND INITIAL APPLICATION |
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An extension of the simultaneously extracted metals/acid-volatile sulfide (SEM/AVS) procedure is presented that predicts the acute and chronic sediment metals effects concentration...
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PREDICTING THE ADSORPTION CAPACITY OF ACTIVATED CARBON FOR EMERGING ORGANIC CONTAMINANTS FROM FUNDAMENTAL ADSORBENT AND ADSORBATE PROPERTIES - PRESENTATION |
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A quantitative structure-property relationship (QSPR) was developed and combined with the Polanyi-Dubinin-Manes model to predict adsorption isotherms of emerging contaminants on ac...
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PREDICTING THE FORMATION OF CHLORINATED AND BROMINATED BY-PRODUCTS. |
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Although disinfection has been and continues to be one of the major public health advances in the 20th century, the disinfectants themselves may react with naturally-occurring mate...
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PREDICTION OF CARBOXYHEMOGLOBIN FORMATION DUE TO TRANSIENT EXPOSURE TO CARBON MONOXIDE |
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Prediction of carboxyhemoglobin formation due to transient xposure to carbon monoxide. . Appl. Physiol. 76(4):1739-1745, 1994.-Fifteen men were exposed to 6,683 ppm C18O for 3.09-6...
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PREDICTION OF MULTICOMPONENT ADSORPTION EQUILIBRIA IN BACKGROUND MIXTURES OF UNKNOWN COMPOSITION |
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A technique has been developed to predict the adsorption equilibria of known organic solutes onto granular activated carbon (GAC) in mixtures of unknown composition. Ideal adsorbed...
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PREDICTION OF SELECTIVITY FOR ACTIVATED CARBON ADSORPTION OF TRACE ORGANIC (HOMOLOGUE) CONTAMINANTS |
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Preferential adsorption of organic compounds onto activated carbon from dilute aqueous solutions was studied to develop a comprehensive theoretical basis for predicting adsorption ...
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PREDICTION OF THE REACTIVITIES OF CYCLOPENTA-POLYNUCLEAR AROMATIC HYDROCARBONS BY QUANTAM MECHANICAL METHODS |
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1. he direction of epoxide ring opening may be predicted using the techniques of theoretical chemistry by comparing the computed total energy of the two possible carbocations forme...
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PREFERENTIAL PARTITIONING OF A PAH AND PCB TO A MARINE SEDIMENT AMENDED WITH SEVERAL SOURCES OF SOOT CARBON |
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Over the last decade, several studies reported that the partitioning of PAHs to sediments, in some cases, did not follow predictions based on equilibrium partitioning theory. One e...
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PREFERENTIAL PARTITIONING OF PAHS AND PCBS TO COAL FLY ASH |
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It has long been known that fly ash has a significant capacity for the adsorption of several classes of anthropogenic pollutants, including toxic metals, nutrients and organic comp...
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PRELIMINARY ASSESSMENT OF HAZARDOUS WASTE PRETREATMENT AS AN AIR POLLUTION CONTROL TECHNIQUE |
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The report evaluates twelve commercially available treatment techniques for their use in removing volatile constituents from hazardous and potentially hazardous waste streams. A ca...
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PRELIMINARY CHARACTERIZATION OF EMISSIONS FROM WOOD-FIRED RESIDENTIAL COMBUSTION EQUIPMENT |
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This report describes a study conducted to quantify criteria pollutants and characterize other atmospheric emissions from wood-fired residential combustion equipment. Flue gases we...
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PRELIMINARY ESTIMATES OF PERFORMANCE AND COST OF MERCURY CONTROL TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS |
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Under the Clean Air Act Amendments of 1990, the Environmental Protection Agency has determined that regulation of mercury emissions from coal-fired power plants is appropriate and ...
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PRELIMINARY ESTIMATES OF PERFORMANCE AND COST OF MERCURY CONTROL TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS: JOURNAL ARTICLE |
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NRMRL-RTP-P- 574 Srivastava*, R.K., Sedman*, C.B., Kilgroe*, J.D., Smith D., and Renninger, S. Preliminary Estimates of Performance and Cost of Mercury Control Technology Applicat...
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PRELIMINARY ESTIMATES OF PERFORMANCE AND COST OF MERCURY EMISSION CONTROL TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS: AN UPDATE |
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The paper presents estimates of performance levels and related costs associated with controlling mercury (Hg) emissions from coal-fired power plants using either powdered activated...
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PRELIMINARY ESTIMATES OF PERFORMANCE AND COST OF MERCURY EMISSION CONTROL TECHNOLOGY APPLICATIONS ON ELECTRIC UTILITY BOILERS: AN UPDATE |
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The paper presents estimates of performance levels and related costs associated with controlling mercury (Hg) emissions from coal-fired power plants using either powdered activated...
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PRELIMINARY EXPOSURE STUDY TO DETERMINE THE EFFECTS OF ACID DEPOSITION ON COATED STEEL SUBSTRATES |
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This report describes the progress that has been made within the Coatings Effect Research Program that the Environmental Protection Agency conducts for Task Group VII within the Na...
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PRELIMINARY FINDINGS ON THE ASSESSMENT OF POTENTIAL CAR-RELATED OCCUPATIONAL PM AND AIR TOXIC EXPOSURE TO PATROL TROOPERS (COPP STUDY) |
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In-vehicle, roadside and community-based measurements of particulate matter (PM) and select air toxics were measured as part of a study involving patrol cars from the North Carolin...
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PRELIMINARY PERFORMANCE AND COST ESTIMATES OF MERCURY EMISSION CONTROL OPTIONS FOR ELECTRIC UTILITY BOILERS |
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The paper discusses preliminary performance and cost estimates of mercury emission control options for electric utility boilers. Under the Clean Air Act Amendments of 1990, EP...
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PRELIMINARY SELECTION OF REFRIGERANTS FOR DUAL-CIRCUIT AND LORENZREFRIGERATOR/FREEZERS |
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The paper discusses the preliminary selection of refrigerants fordual-circuit and Lorenz refrigerator/freezers (RFs). ince RFscurrently use a fully halogenated chlorofluorocarbon (...
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PREPARATION AND CHARACTERIZATION OF MOLECULARLY IMPRINTED ELECTROPOLYMERIZED CARBON ELECTRODES |
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Molecularly imprinted polymers (MIP) selective for fluorescein, rhodamine or 2,4-dichlorophenoxyacetic acid (2,4-D) were electropolymerized onto graphite electrodes using an aque...
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PREPARATION AND EVALUATION OF POWDERED ACTIVATED CARBON FROM LIGNOCELLULOSIC MATERIALS |
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This research project was conceived as a preliminary evaluation of the technical feasibility of converting solid wastes into adsorbents suitable for wastewater treatment. The work ...
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PREPARATION OF POLY(VINYL ACETATE) LATEXES IN LIQUID AND SUPERCRITICAL CARBON DIOXIDE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PREVENTION OF PHOTORESIST PATTERN COLLAPSE BY USING LIQUID CARBON DIOXIDE |
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Photoresist polymers with small aspect ratios are presently cleaned with aqueous solutions. For small aspect ratios, the pattern collapses during the drying step. The origin of res...
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PREVENTION OF PHOTORESIST PATTERN COLLAPSE BY USING LIQUID CARBON DIOXIDE : JOURNAL ARTICLE |
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NRMRL-RTP 546, Matthews, M.A., and Darvin*, C.H. Prevention of Photoresist Pattern Collapse by Using Liquid Carbon Dioxide. Industrial & Engineering Chemistry Research 40 (24):585...
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PREVENTION REFERENCE MANUAL: CHEMICAL SPECIFIC. VOLUME 6. CONTROL OF ACCIDENTAL RELEASES OF CARBON TETRACHLORIDE (SCAQMD) (SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT) |
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The manual summarizes information that will aid in identifying and controlling release hazards specific to the South Coast Air Quality Management District (SCAQMD) of southern Cali...
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PRIMARY AND SECONDARY CONTRIBUTIONS TO AMBIENT PM IN THE MIDWESTERN UNITED STATES |
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Ambient PM2.5 samples were collected in five Midwestern US cities throughout 2004: East St. Louis, Illinois; Detroit, Michigan; Cincinnati, Ohio; Bondville, Illinois; an...
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PRIMARY AND SECONDARY ORGANIC AEROSOLS OVER THE UNITED STATES: ESTIMATES ON THE BASIS OF OBSERVED ORGANIC CARBON (OC) AND ELEMENTAL CARBON (EC), AND AIR QUALITY MODELED PRIMARY (OC/EC) RATIOS |
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The temporal and spatial distributions of primary and secondary organic carbon aerosols (OC) over the continental US during June 15 to August 31, 1999, were estimated by using obse...
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PRIMARY PARTICLES GENERATED BY THE COMBUSTION OF HEAVY FUEL OIL AND COAL: REVIEW OF RESEARCH RESULTS FROM EPA'S NATIONAL RISK MANAGEMENT RESEARCH LABORATORY |
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Researchers at the U.S. Environmental Protection Agency's (EPA's) Office of Research and
Development (ORD) have conducted a series of tests to characterize the size and composit...
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PRIMARY PRODUCTION AND COMMUNITY RESPIRATION RATES ON THE LOUISIANA CONTINENTAL SHELF INDICATE SUBSTANTIAL CARBON SUBSIDIES |
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abstract for presentation...
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PROBABILISTIC ASSESSMENT OF GROUNDWATER VULNERABILITY TO NONPOINT SOURCE POLLUTION IN AGRICULTURAL WATERSHEDS |
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This paper presents a probabilistic framework for the assessment of groundwater pollution potential by pesticides in two adjacent agricultural watersheds in the Mid-Altantic Coasta...
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PROBING REACTIVITY OF DISSOLVED ORGANIC MATTER FOR DISINFECTION BY-PRODUCT FORMATION USING XAD-8 RESIN ADSORPTION AND ULTRAFILTRATION FRACTIONATION. (R828045) |
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The disinfection by-product (DBP) reactivity (yield and speciation upon reaction with chlorine) of dissolved organic matter (DOM) isolated from two surface waters was investigat...
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PROBLEMS OF AQUATIC TOXICOLOGY, BIOTESTING AND WATER QUALITY MANAGEMENT: PROCEEDINGS OF USA-USSR SYMPOSIUM, BOROK, JAROSLAVL OBLAST, JULY 30-AUGUST 1, 1984 |
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Sixteen papers delivered by USA and USSR scientists at a symposium are presented. The effect of low pH on aquatic invertebrates and the use of fish behavior in comparing toxic effe...
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PROCEDURES FOR DERIVING EQUILIBRIUM PARTITIONING BENCHMARKS (ESBS) FOR THE PROTECTION OF BENTHIC ORGANISM: PAH MIXTURES |
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This equilibrium partitioning sediment benchmark (ESB) document describes procedures to derive concentrations of PAH mixtures in sediment which are protective of the presence of ...
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PROCEDURES FOR DERIVING EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS (ESBS) FOR THE PROTECTION OF BENTHIC ORGANISMS: DIELDRIN |
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This equilibrium partitioning sediment benchmark (ESB) document describes procedures to derive concentrations of the insecticide dieldrin in sediment which are protective of the pr...
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PROCEDURES FOR DERIVING EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS (ESBS) FOR THE PROTECTION OF BENTHIC ORGANISMS: ENDRIN |
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This equilibrium partitioning sediment benchmark (ESB) document describes procedures to derive concentrations of the insecticide endrin in sediment which are protective of the pres...
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PROCEDURES FOR THE DERIVATION OF EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS (ESBS) FOR THE PROTECTION OF BENTHIC ORGANISMS: ENDRIN |
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Under the Clean Water Act, EPA and the States develop programs for protecting the chemical, physical, and biological integrity of the nation's waters. To support these programs, e...
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PROCEDURES FOR THE DERIVATION OF EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS (ESBS) FOR THE PROTECTION OF BENTHIC ORGANISMS: PAH MIXTURES |
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This equilibrium partitioning sediment benchmark (ESB) document describes procedures to derive concentrations of PAH mixtures in sediment which are protective of the presence of be...
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PROCEEDINGS OF THE INTERNATIONAL WORKSHOP ON CARBON CYCLING IN BOREAL FOREST AND SUB-ARCTIC ECOSYSTEMS |
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Global climate is projected to change rapidly during the next half century as a result of alternations in the chemical composition of the atmosphere. urther, climate change may be ...
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PROCEEDINGS OF TWO HIGHWAY VEHICLE EMISSION INVENTORY WORKSHOPS |
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The report gives results of two workshops held by the U.S. EPA to solicit research ideas from outside the Agency on research opportunities to improve the state-of-the-art in estima...
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PROCEEDINGS: THE 1992 GREENHOUSE GAS EMISSIONS AND MITIGATION RESEARCH SYMPOSIUM |
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The report documents the 1992 Greenhouse Gas Emissions and Mitigation Research Symposium held in Washington, DC, August 18-20, 1992. The symposium provided a forum for exchange of ...
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PROCEEDINGS: THE 1992 GREENHOUSE GAS EMISSIONS AND MITIGATION RESEARCH SYMPOSIUM |
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The report documents the 1992 Greenhouse Gas Emissions and Mitigation Research Symposium held in Washington, DC, August 18-20, 1992. The symposium provided a forum for exchange of ...
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PROCEEDINGS: THE 1995 SYMPOSIUM ON GREENHOUSE GAS EMISSIONS AND MITIGATION RESEARCH |
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The report documents the 1995 Symposium on Greenhouse Gas Emissions and Mitigation Research, sponsored by the U.S. Environmental Protection Agency's Air Pollution Prevention and Co...
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PROCESS MODELING TREE AND FOREST GROWTH: CURRENT PERSPECTIVES AND FUTURE NEEDS |
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This volume demonstrates that the modeling of tree and forest growth based on physiological processes is emerging as an important discipline in forestry research. ome possible dire...
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PRODUCTION AND TRANSPORT OF CARBON DIOXIDE IN A CONTAMINATED VADOSE ZONE: A STABLE AND RADIOACTIVE CARBON ISOTOPE STUDY |
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Analyses of soil gas compositions and stable and radioactive carbon isotopes in the vadose zone above an alluvial aquifer were conducted at an organic solvent disposal site in sout...
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PRODUCTS IDENTIFIED AT AN ALTERNATIVE DISINFECTION PILOT PLANT |
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A research cooperative agreement was developed with Jefferson Parish, Louisiana, to evaluate four parallel streams treated with four different disinfectants (chlorine, monochlorami...
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PROGRESS IN WASTEWATER DISINFECTION TECHNOLOGY |
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Rapid progress is being made in the field of wastewater disinfection, but much more work is needed before a design manual can be formulated. It appears that considerable savings in...
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PROTON INDUCED GAMMA-RAY ANALYSIS OF ATMOSPHERIC AEROSOLS FOR CARBON, NITROGEN, AND SULFUR COMPOSITION |
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A technique for the simultaneous quantitative analysis of carbon, nitrogen, and sulfur using in-beam gamma-ray spectrometry has been developed for use with atmospheric aerosol samp...
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PROVISIONAL ASSESSMENT OF RECENT STUDIES ON PARTICULATE MATTER |
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A review of the national ambient air quality standards (NAAQS) for particulate matter (PM) is currently underway. The Criteria Document was completed in October 2004, and a propos...
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PULMONARY AND CARDIAC GENE EXPRESSION FOLLOWING ACUTE ULTRAFINE CARBON PARTICLE INHALATION IN HYPERTENSIVE RATS |
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Inhalation of ultrafine carbon particles (ufCP) causes cardiac physiological changes without marked pulmonary injury or inflammation. We hypothesized that acute ufCP exposure of 13...
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PULMONARY FUNCTION IN NORMAL AND ELASTASE-TREATED HAMSTERS EXPOSED TO A COMPLEX MIXTURE OF OLEFIN-OZONE-SULFUR DIOXIDE REACTION PRODUCTS |
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An elastase-induced emphysema model was utilized to determine if hamsters with preexisting lung disease were more susceptible to lung damage from air pollutant exposure. Male golde...
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PULMONARY INFLAMMATORY, CHEMOKINE, AND MUTAGENIC RESPONSES IN RATS AFTER SUBCHRONIC INHALATION OF CARBON BLACK |
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NO ABSTRACT PROVIDED...
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PULMONARY TOXICITY OF SIZE-CLASSIFIED COAL FLY ASH PARTICLES OF VARYING CARBON CONTENT |
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Epidemiological studies have shown that morbidity and mortality increase along with concentration of particulate matter (PM) in many different countries and regions despite great v...
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PULMONARY TOXICOLOGY OF SYNTHETIC AIR POLLUTION PARTICLES CONTAINING METAL SULFATES COMPARED TO CARBON BLACK AND DIESEL |
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PULMONARY TOXICITY OF SYNTHETIC AIR POLLUTION PARTICLES CONTAINING METAL SULFATES COMPARED TO CARBON BLACK AND DIESEL.
M Daniels, A Ranade* & MJ Selgrade & MI Gilmour. |
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PULVERIZED COAL COMBUSTION: POLLUTANT FORMATION AND CONTROL, 1970-1980 |
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The report documents the support role of EPA's Air and Energy Engineering Research Laboratory in the major research effort directed by EPA in the l970s to understand pollutant form...
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PYROGENIC ACTIVITY OF CARBON-FILTERED WATERS |
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The endotoxin content and pyrogenic response of granular activated carbon (GAC) filtered waters were studied. GAC-filtered secondary effluent from an activated sludge pilot plant c...
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PYROLYSIS OF INDUSTRIAL WASTES FOR OIL AND ACTIVATED CARBON RECOVERY |
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The Occidental Research Corporation (formerly Garrett Research and Development Company, Inc.) has developed a new Flash Pyrolysis process which can produce up to two barrels of syn...
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Pd-N-Heterocyclic Carbene (NHC) Organic Silica: Synthesis and Application in Carbon-Carbon Coupling Reactions |
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The first Pd-N-heterocyclic carbene (NHC) complex in the form of organic silica was prepared using sol-gel method and its application in Heck and Suzuki reaction were demonstrated....
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Perfluorooctanoic acid and environmental risks |
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Perfluorooctanoic acid (PFOA) is a member of the perfluoroalkyl acids (PFAA) family of chemicals, which consist of a carbon backbone typically four to fourteen carbons in length an...
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Pitting Corrosion of Copper in Waters with High pH and Low Alkalinity |
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Localized or pitting corrosion of copper pipes used in household drinking-water plumbing is a problem for many water utilities and their customers. Extreme attack can lead to pinho...
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Predicting Chlorine Residuals and Formation of TTHMs in Drinking Water |
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Chlorination is the most widely practiced form of disinfection in the United States. It is highly effective against most microbiological contaminants. However, there is concern tha...
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Presence of organic matter and microbial activity in Minebank Run, a restored stream in the Chesapeake Bay watershed |
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Abstract: Increasing nitrate levels in streams and ground water are harmful to both the environment and humans. Denitrification, a natural process performed by microbes, removes ni...
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QSAR ANALYSIS OF SORPTION-CORRECTED RATE CONSTANTS FOR REDUCTIVE BIOTRANSFORMATION OF HALOGENATED AROMATICS |
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The inherent coupling among geochemical and microbial reactions may have significant effects on the environmental fate of a containinant. For example, sorption processes may decrea...
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QSARS FOR PREDICTING BIOTIC AND ABIOTIC REDUCTIVE TRANSFORMATION RATE CONSTANTS OF HALOGENATED HYDROCARBONS IN ANOXIC SEDIMENT SYSTEMS |
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Quantitative structure-activity relationships (QSARs) are developed relating biotic and abiotic pseudo-first-order disappearance rate constants of halogenated hydrocarbons in anoxi...
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QSARS FOR PREDICTING REDUCTIVE TRANSFORMATION RATE CONSTANTS OF HALOGENATED AROMATIC HYDROCARBONS IN ANOXIC SEDIMENT SYSTEMS |
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Quantitative structure-activity relationships (QSARs) are developed relating initial and final pseudo-first-order disappearance rate constants of 45 halogenated aromatic hydrocarbo...
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QUALITY ASSURANCE IN SUPPORT OF ENERGY RELATED MONITORING ACTIVITIES: ANNUAL REPORT NO. 3 |
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This report describes and summarizes the activities during the third year of the program entitled, Quality Assurance in Support of Energy Related Activities. The activities reporte...
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QUALITY ASSURANCE PERFORMANCE AUDIT REPORT FOR THE SECRETARIA DEL MEDIO AMBIENTE CIUDAD DE MEXICO, DF, MEXICO RED AUTOMATICA DE MONITOREO ATMOSFERICO (RAMA) AIR QUALITY MONITORING STATIONS |
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The United States Environmental Protection Agency (U.S. EPA) conducted this evaluation of the air monitoring network, known as RAM (Red Automatica de Monitoreo Atmosferico) at th...
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QUANTIFYING THE ORGANIC CARBON HELD IN FORESTED SOILS OF THE UNITED STATES AND PUERTO RICO |
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It is well known that soils are an important global reservoir of organic carbon (C). In fact, it has been estimated that at 1500 Pg (1Pg = 1015 g) world soils hold approximately t...
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QUANTIFYING THE ORGANIC CARBON HELD IN FORESTED SOILS OF THE UNITED STATES AND PUERTO RICO |
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Forested ecosystems provide a number of important services to humans. In addition to wood, fiber food and fuel production they also provide habitat for wildlife and a substantial ...
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QUANTIFYING ULTRAVIOLET RADIATION DOSE RELATIVE TO WETLAND HABITAT VARIABLES FOR THE ASSESSMENT OF RISK TO AMPHIBIANS |
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Ultraviolet B radiation (UV-B) has increased globally over the last several decades due to reduction of stratospheric ozone. UV-B may also increase when climate change alters cloud...
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QUANTITATIVE ASSESSMENT OF CANCER RISK FROM EXPOSURE TO DIESEL ENGINE EMISSIONS |
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Quantitative estimates of lung cancer risk from exposure to diesel engine emissions were developed using data from three chronic bioassays with Fischer 344 rats. uman target organ ...
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QUANTITATIVE ENZYME-LINKED IMMUNOSORBENT ASSAY FOR DETERMINATION OF POLYCHLORINATED BIPHENYLS IN ENVIRONMENTAL SOIL AND SEDIMENT SAMPLES |
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An enzyme-linked immunosorbent assay (ELISA) for the quantitative determination of Aroclors 1242, 1248, 1254, and 1260 in soil and sediments was developed and its performance compa...
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QUENCHING OF CHLORINATION DISINFECTION BY-PRODUCT FORMATION IN DRINKING WATER BY HYDROGEN PEROXIDE. (R825362) |
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Reactions between chlorine disinfectants, dissolved organic matter, and other chemicals in water form a series of disinfection by-products (DBPs), including trihalomethanes (THM...
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RADIAL PATTERNS OF CARBON ISOTOPES IN THE XYLEM EXTRACTIVES AND CELLULOSE OF DOUGLAS-FIR |
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Heartwood extractives (nonstructural wood components) are believed to be formed from a combination of compounds present in the adjacent sapwood and materials imported from the phlo...
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RADIOCARBON ANALYSIS OF PM 2.5 AMBIENT AEROSOL |
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The radiocarbon (14C) content of an ambient aerosol sample can be directly related to the fraction of the sample's total carbon mass contributed by natural (biogenic) sources. S...
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RADIOCARBON MEASUREMENT OF THE BIOGENIC CARBON CONTRIBUTION TO PM 2.5 AEROSOL NEAR TAMPA, FL |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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RADIOCARBON MEASUREMENT OF THE BIOGENIC CONTRIBUTION TO SUMMERTIME PM 2.5 AMBIENT AEROSOL IN NASHVILLE, TN |
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Radiocarbon (14C) measurements performed on PM-2.5 samples collected near Nashville, TN from June 21 to July 13, 1999, showed high levels of modern carbon, ranging from 56 to 80% o...
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RADIOCARBON MEASUREMENTS ON PM 2.5 AMBIENT AEROSOL FROM NASHVILLE, TN |
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Radiocarbon (Carbon-14) measurements provide an estimate of the fraction of carbon in a sample that is biogenic. The methodology has been extensively used in past wintertime stu...
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RADIOCARBON MEASUREMENTS ON PM-2.5 AMBIENT AEROSOL |
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Radiocarbon (14C) measurements provide an estimate of the fraction of carbon in a sample that is biogenic. The methodology has been extensively used in past wintertime studies t...
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RADIONUCLIDE REMOVAL |
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The U.S. Environmental Protection Agency proposed new and revised regulations on radionuclide contaminants in drinking water in June 1991. uring the 1980's, the Drinking Water Rese...
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RADIUM REMOVAL FOR A SMALL COMMUNITY WATER SUPPLY SYSTEM |
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In 1984, a radium removal treatment plant was constructed for the small community of Redhill Forest located in the central mountains of Colorado. The treatment plant consists of a ...
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RADON REMOVAL BY POE GAC SYSTEMS: DESIGN PERFORMANCE AND COST |
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This report summarizes previous research conducted by Lowry Engineering, Inc. (LEI), the Maine Department of Human Services, Division of Health Engineering, and the University of M...
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RADON REMOVAL BY POINT-OF-ENTRY GRANULAR ACTIVATED CARBON SYSTEMS: DESIGN PERFORMANCE AND COST |
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The report summarizes previous research conducted by Lowry Engineering, Inc. (LEI), the Maine Department of Human Services, Division of Health Engineering, and the University of Ma...
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RADON REMOVAL FOR SMALL COMMUNITY PUBLIC WATER SUPPLIES |
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This report presents the results of an evaluation, performed by the University of New Hampshire--Environmental Research Group (ERG), of radon removal in small community water suppl...
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RADON REMOVAL TECHNIQUES FOR SMALL COMMUNITY PUBLIC WATER SUPPLIES |
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The report presents the results of an evaluation, performed by the University of New Hampshire--Environmental Research Group (ERG), of radon removal in small community water suppli...
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RADON REMOVAL USING POINT-OF-ENTRY WATER TREATMENT TECHNIQUES |
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The purpose of this EPA Cooperative Agreement was to evaluate the performance of POE granular activated carbon (GAG), and diffused bubble and bubble place aeration systems treating...
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RADON REMOVAL USING POINT-OF-ENTRY WATER TREATMENT TECHNIQUES |
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The purpose of the EPA Cooperative Agreement was to evaluate the performance of POE granular activated carbon (GAC), and diffused bubble and bubble place aeration systems treating ...
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RAINFALL AND RUNOFF AS A SOURCE OF ORGANIC CARBON ADDITIONS TO BAYOU TEXAR, FLORIDA |
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Rainfall and Runoff as a Source of Organic Carbon Additions to Bayou Texar, Florida (Abstract). To be presented at the16th Biennial Conference of the Estuarine Research Foundation,...
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RAPID ANALYSIS OF CYANURIC ACID IN SWIMMING POOL WATERS BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY USING POROUS GRAPHITIC CARBON |
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An innovative approach is presented for reducing analysis times of cynuric acid in swimming pool waters by high performance liquid chromatography (HPLC). The HPLC method exploits ...
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RAPID ANALYSIS OF CYNANURIC ACID IN SWIMMING POOL WATERS BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY USING POROUS GRAPHITIC CARBON COLUMN |
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An innovative approach is presented for reducing analysis times of cyanuric acid in swimming pool waters by high performance liquid chromatography (HPLC). The HPLC method exploits...
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RAPID AND PRECISE METHOD FOR MEASURING STABLE CARBON ISOTOPE RATIOS OF DISSOLVED INORGANIC CARBON |
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We describe a method for rapid preparation, concentration and stable isotopic analysis of dissolved inorganic carbon (d13C-DIC). Liberation of CO2 was accomplished by placing 100 ?...
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RAPID DECHLORINATION OF CARBON TETRACHLORIDE AND CHLOROFORM BY EXTRACELLULAR AGENTS IN CULTURES OF METHANOSARCINA THENNOPHILA. (R825549C044) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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RAPID-INFILTRATION SYSTEM FOR WASTEWATER RENOVATION AND BENEFICIAL REUSE |
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A full scale rapid infiltration wastewater treatment system consisting of four basins averaging 89 x 465 m. The hydraulic loading of 90 m/year was achieved by operating the basins ...
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RARE OCCURRENCE OF HETEROTROPHIC BACTERIA WITH PATHOGENIC POTENTIAL IN POTABLE WATER |
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Since the discovery of Legionella pneumophila, an opportunistic pathogen that is indigenous to water, microbiologists have speculated that there may be other opportunistic pathogen...
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RARE OCCURRENCE OF HETEROTROPHIC BACTERIA WITH PATHOGENIC POTENTIAL IN POTABLE WATER |
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Since the discovery of Legionella pneumophila, an opportunistic pathogen that is indigenous to water, microbiologists have speculated that there may be other opportunistic pathogen...
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RARE OCCURRENCE OF HETEROTROPHIC BACTERIA WITH PATHOGENIC POTENTIAL IN POTABLE WATER |
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Since the discovery of Legionella pneumophila, an opportunistic pathogen that is indigenous to water, microbiologists have speculated that there may be other opportunistic pathogen...
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RAT AND HUMAN SENSORY EVOKED POTENTIALS AND THE PREDICTABILITY OF HUMAN NEUROTOXICITY FROM RAT DATA |
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The development of comprehensive quantitative models as alternatives to risk assessment based on uncertainty factors will require many steps, among them consideration of the relati...
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RATES OF IRON OXIDATION AND ARSENIC SORPTION DURING GROUND WATER-SURFACE WATER MIXING AT A HAZARDOUS WASTE SITE |
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The fate of arsenic discharged from contaminated ground water to a pond at a hazardous waste site is controlled, in part, by the rate of ferrous iron oxidation-precipitation and ar...
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RATES OF REACTION AND PROCESS DESIGN DATA FOR THE HYDROCARB PROCESS |
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The report provides experimental and process design data in support of studies for developing the coprocessing of fossil fuels with biomass by the Hydrocarb process. The experiment...
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RATES OF REACTION AND PROCESS DESIGN DATA FOR THE HYDROCARB PROCESS |
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The report provides experimental and process design data in support of studies far developing the coprocessing of fossil fuels with biomass by the Hydrocarb process. he experimenta...
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REACH-SCALE GEOMORPHOLOGY AFFECTS ORGANIC MATTER AND CONSUMER Ä 13C IN A FORESTED PIEDMONT STREAM |
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We investigated seasonal (spring, autumn) and spatial variation of stream organic matter and consumer δ 13C in a Piedmont stream. Sites were sampled along a continuum and fit ...
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REACTION OF ACTIVATED CARBON WITH AQUEOUS CHLORINE AND CHLORINE DIOXIDE |
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The objective of this research was to determine whether aqueous chlorine and chlorine dioxide react with activated carbon, or with compounds adsorbed on activated carbon, to produc...
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REACTIONS OF CHLORITE WITH ACTIVATED CARBON AND WITH VANILLIC ACID AND INDAN ADSORBED ON ACTIVATED CARBON |
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The reaction between chlorite (CO2(-1)) and vanillic acid, at pH 6.0 in the presence of granular activated carbon (GAC), yielded several reaction products identifiable by GC/MS; no...
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REACTIVATION OF GRANULAR CARBON IN AN INFRARED TRAVELING BELT FURNACE |
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An all-electrical Shirco carbon regeneration furnace and its air pollution control system have been evaluated for cost and process effectiveness in carbon reactivation at the Pomon...
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REAL-TIME INDOOR AND OUTDOOR MEASUREMENTS OF BLACK CARBON IN AN OCCUPIED HOUSE: AN EXAMINATION OF SOURCES |
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Black carbon (BC) was measured every five minutes for two years (May, 1998 to May 2000) inside and immediately outside a northern Virginia house (suburban Washington, DC) occupie...
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REAL-TIME MEASUREMENTS OF THE CHEMICAL COMPOSITION OF SIZE-RESOLVED PARTICLES DURING A SANTA ANA WIND EPISODE, CALIFORNIA USA. (R826240) |
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Size-resolved particle composition, mass and number concentrations, aerosol scattering coefficients, and prevailing meteorological conditions were measured at the Ellen Browning...
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RECENT ADVANCES IN EPA'S (ENVIRONMENTAL PROTECTION AGENCY'S) MONITORI AND METHODS DEVELOPMENT RESEARCH |
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Several areas of advanced research related to sampling, analysis, and human exposure assessment of exhaust emission in ambient air have been developed. These include studies of new...
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RECENT DEVELOPMENTS OF EMISSION CONTROL TECHNOLOGY IN THE UNITED STATES FOR FOSSIL FUEL COMBUSTION SOURCES |
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The paper discusses control of air pollution from fossil fuel combustion. ntil recently, this meant abatement of smoke (particulate), sulfur dioxide, and oxides of nitrogen. With g...
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RECEPTOR MODELING FOR CARBONACEOUS AEROSOLS: SOURCE CHARACTERIZATION |
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Two types of sources, freeway vehicles and a commercial airport, were sampled with the objective of determining source profiles suitable for receptor modeling of carbonaceous aeros...
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RECEPTOR MODELING OF AMBIENT AND PERSONAL EXPOSURE SAMPLES: 1998 BALTIMORE PARTICULATE MATTER EPIDEMIOLOGY-EXPOSURE STUDY |
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Sources of particulate matter exposure for an elderly population in a city north of Baltimore, MD were evaluated using advanced factor analysis models. Data collected with Versa...
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RECEPTOR MODELING OF FINE PARTICLES IN THE TACOMA TIDEFLATS AIRSHED |
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A receptor modeling study was conducted in the Tacoma tideflats airshed. he tideflats area is a small but heavily industrial area adjacent to the Commencement Bay waterway of Puget...
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RECEPTOR MODELING STUDY OF DENVER WINTER HAZE |
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A multiple regression single element tracer method was used to estimate source contributions to fine and coarse aerosol mass and light extinction, measured in Denver during January...
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RECEPTOR MODELS RELATING AMBIENT SUSPENDED PARTICULATE MATTER TO SOURCES |
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The report describes the use of receptor models to determine the source contributions to ambient particulate matter loadings at sampling sites, based on common properties between s...
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RECONSTRUCTION AND ANALYSIS OF HISTORICAL CHANGES IN CARBON STORAGE IN ARCTIC TUNDRA |
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Surface air temperature in arctic regions has increased since pre-industrial times, raising concerns that warmer and possibly drier conditions have increased soil decomposition rat...
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RECOVERY AND DIVERSITY OF HETEROTROPHIC BACTERIA FROM CHLORINATED DRINKING WATERS |
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Heterotrophic bacteria were enumerated from the Seattle drinking water catchment basins and distribution system. The highest bacterial recoveries were obtained by using a very dilu...
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RECOVERY OF 3-CHLORO-4-(DICHLOROMETHYL)-5-HYDROXY-2(5H)-FURANONE FROM WATER SAMPLES ON XAD RESINS AND THE EFFECT OF CHLORINE ON ITS MUTAGENICITY |
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The recovery of 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (MX) from granular activated carbon (GAC)/distilled water by adsorption on XAD-8 resin was approximately 3-fold...
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RECOVERY OF BY-PRODUCTS FROM ANIMAL WASTES: A LITERATURE REVIEW |
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The primary purpose of this report was to identify and summarize by-product-from-animal-wastes-recovery processes from the current literature. By-product recovery processes are dis...
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RECOVERY OF ORGANIC PRODUCTS FROM IONIC LIQUIDS USING SUPERCRITICAL CARBON DIOXIDE. (R826734) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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RECOVERY OF PRINCIPAL ORGANIC HAZARDOUS CONSTITUENTS AND PRODUCTS OF INCOMPLETE COMBUSTION FROM A VOLATILE ORGANIC SAMPLING TRAIN |
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The report describes an investigation of the recovery efficiencies of selected principal organic hazardous constituents (POHCs) from the Volatile Organic Sampling Train (VOST) unde...
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RECYCLING OF WATER IN POULTRY PROCESSING PLANTS |
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Studies were conducted on recycling chiller water in a poultry processing plant. The recycling system must be provided with the capability of removing solids and controlling the mi...
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REDUCED STOMATAL CONDUCTANCE IN SWEETGUM (LIQUIDAMBAR STYRACIFLUA) SUSTAINED OVER LONG-TERM CO2 ENRICHMENT |
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Over four years (1998-2001), we examined the effects of CO2 enrichment on stomatal conductance (gs) of sun and shade leaves of overstory sweetgum (Liquidambar styraciflua L.) grown...
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REDUCING CARBON EMISSIONS: INTERACTIONS WITH THE TAX SYSTEM RAISE THE COST. (R825313) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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REDUCING MERCURY EMISSION FROM MUNICIPAL WASTE COMBUSTION WITH CARBON INJECTION INTO FLUE GAS |
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The paper gives results of tests (to aid in developing emission rules) in July and August 1991 on a 360-tonne/day mass burn municipal waste combustor (MWC) at the Ogden Martin Syst...
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REDUCTION AND BINDING OF ARSENATE AND DIMETHYLARSINATE BY GLUTATHIONE: A MAGNETIC RESONANCE STUDY |
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By observing the chemical shifts of the proton and carbon-13 nuclei of reduced glutathione, the interactions of arsenate, arsenite and dimethylarsinate with this tripeptide have be...
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REDUCTION OF CO2 EMISSIONS FROM MOBILE SOURCES BY ALTERNATIVE FUELS DERIVED FROM BIOMASS |
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The paper discusses process options for utilizing biomass to obtain greatest reduction of carbon dioxide (CO2) emissions from motor vehicles at least cost. (NOTE: The Energy Policy...
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REDUCTION OF HEXACHLOROETHANE AND CARBON TETRACHLORIDE AT SURFACES OF BIOTITE, VERMICULITE, PYRITE, AND MARCASITE |
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Environmental factors significantly affect the transformation rates and the pathways of halogenated aliphatic compounds. e have studied the transformation of tetrachloromethane (CT...
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REDUCTIVE DECHLORINATION OF CARBON TETRACHLORIDE WITH ELEMENTAL IRON. (R825549C044) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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REDUCTIVE DECHLORINATION OF CHLOROPHENOLS IN SLURRIES OF LOW-ORGANIC-CARBON MARINE SEDIMENTS AND SUBSURFACE SOILS |
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NO ABSTRACT PROVIDED...
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REDUCTIVE DECHLORINATION OF DICHLOROPHENOLS IN ANAEROBIC POND SEDIMENTS |
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The time required for the microbially mediated dechlorination of chloroaromatics in anaerobic freshwater sediments may he dependent upon sediment microbial communities and physical...
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REDUCTIVE DECHLORINATION OF DICHLOROPHENOLS IN ANAEROBIC PONDSEDIMENTS |
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The time required for the microbially mediated dechlorination ofchloroaromatics in anaerobic freshwater sediments may be dependentupon sediment microbial communities and physical c...
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REDUCTIVE DEHALOGENATION OF HEXACHLOROETHANE, CARBON TETRACHLORIDE, AND BROMOFORM BY ANAHYDROQUINONE DISULFONATE AND HUMIC ACID |
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The reductive dehalogenation of hexachloroethane (C2CI6), carbon tetrachloride (CC14), and bromoform (CHBr3) was examined at 50 degrees C in aqueous solutions containing either (1)...
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REFINING THE DUAL ISOTOPE APPROACH TO DETERMINE FIELD ESTIMATES OF LITTER, ROOT, AND SOM COMPONENTS OF SOIL CO2 EFFLUX |
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Stable isotopes have become an important tool for determining the relative importance of CO2 sources and sinks contributing to the global carbon budget. Of particular importance i...
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REGION, LANDSCAPE, AND SCALE EFFECTS ON LAKE SUPERIOR TRIBUTARY WATER QUALITY |
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In this study we apply an approach to third-order streams that we used previously to predict sensitivity of second-order streams to nonpoint source pollution based on the nonlinear...
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REGIONAL AIR POLLUTION STUDY. CARBON DIOXIDE EFFECTS ON RAMS (REGIONAL AIR MONITORING SYSTEM) SULFUR MONITORS |
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Effects of carbon dioxide (CO2) content of the air on the response of flame photometric sulfur gas analyzers of two types, the Tracor model 270 HA sulfur chromatograph and the Melo...
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REGIONAL EMISSIONS OF NITRIC OXIDE (NO) AND CARBON DIOXIDE (CO2) IN AGROECOSYSTEMS IN CENTRAL WEST REGION, BRAZIL. |
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The Central West Region in Brazil has been the focus of intense agricultural expansion since the 1970s and, nowadays, a large area of native cerrado has been converted to agricultu...
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REGIONAL ESTIMATION OF CURRENT AND FUTURE FOREST BIOMASS. (R828785) |
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The 90,674 wildland fires that burned 2.9 million ha at an estimated suppression cost of $1.6 billion in the United States during the 2000 fire season demonstrated that forest f...
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REGIONAL REACTIVATION OF GRANULAR ACTIVATED CARBON |
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A major portion of the cost of using Granular Activated Carbon (GAC) as a water treatment unit process is associated with spent carbon replacement or reactivation. Regional reactiv...
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REGIONAL SCALE EVIDENCE FOR IMPROVEMENTS IN SURFACE WATER CHEMISTRY 1990 TO 2001 |
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The main aim of the international UNECE monitoring program ICP Waters under the Convention of Long-range Transboundary Air Pollution (CLRTAP) is to assess, on a regional basis, the...
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REGIONAL-SCALE SPATIAL PATTERNS OF SOIL C, N AND WATER PROPERTIES FROM DETAILED SOIL SURVEYS COMBINED WITH SOIL CHARACTERIZATION DATA FOR SITES IN WESTERN OREGON, USA |
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abstract for presentation...
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REGULATION OF CYTOKINE PRODUCTION IN HUMAN ALVEOLAR MACHROPHAGES AND AIRWAY EPITHELIAL CELLS IN RESPONSE TO AMBIENT AIR POLLUTION PARTICLES: FURTHER MECHANISTIC STUDIES |
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In order to better understand how ambient air particulate matter (PM) affect lung health, the two main airway cell types likely to interact with inhaled particles, alveolar macrop...
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RELATING METEOROLOGICAL VARIABLES AND TRENDS IN MOTOR VEHICLE EMISSIONS TO MONTHLY URBAN CARBON MONOXIDE CONCENTRATIONS |
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NO ABSTRACT PROVIDED...
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RELATING PERSONAL PM AND PM-ASSOCIATED ELEMENTAL CARBON EXPOSURES TO CARDIOVASCULAR AND PULMONARY SYMPTOMS IN A HIGH-RISK SUBPOLULATION |
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Sensitive subpopulations such as COPD patients have been shown to be especially susceptible to the effects of PM exposure. Proximity to traffic has been shown to be a predictor ...
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RELATIONS BETWEEN BACTERIAL NITROGEN METABOLISM AND GROWTH EFFICIENCY IN AN ESTUARINE AND AN OPEN-WATER ECOSYSTEM |
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Bacterial uptake or release of dissolved nitrogen compounds (amino nitrogen, urea, ammonium and nitrate) were examined in 0.8 |m filtered water from an estuary (Santa Rosa Sound [S...
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RELATIONSHIP BETWEEN AIR QUALITY AND SELECTED CARDIAC DEFECTS AND ORAL CLEFTS, TEXAS, 1997-2000 |
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One previous study of air quality and birth defects reported associations between carbon monoxide and ozone exposures and selected cardiac defects. To corroborate these results the...
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RELATIONSHIP BETWEEN AMBIENT AIR QUALITY AND SELECTED BIRTH DEFECTS, SEVEN COUNTY STUDY, TEXAS, 1997-2000 |
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Background and Objectives: A number of epidemiologic investigations have shown adverse effects of ambient air pollution on reproductive outcomes including spontaneous abortion, fe...
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RELATIONSHIP BETWEEN DEHALOCOCCOIDES DNA AND GEOCHEMICAL PARAMETERS IN CHLOROETHYLENE-CONTAMINATED AQUIFERS |
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Dehalococcoides organisms are very attractive for application in
natural or engineered bioremediation of chloroethylene-contaminated sites because they are the only organisms know...
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RELATIONSHIP BETWEEN DEHALOCOCCOIDES DNA AND GEOCHEMICAL PARAMETERS IN CHLOROETHYLENE-CONTAMINATED AQUIFERS |
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Dehalococcoides organisms are very attractive for application in natural or engineered bioremediation of chloroethylene-contaminated sites because they are the only organisms known...
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RELATIONSHIP BETWEEN MEASURED WATER VAPOR GROWTH AND CHEMISTRY OF ATMOSPHERIC AEROSOL FOR GRAND CANYON, ARIZONA, IN WINTER 1990. |
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Size-resolved aerosol growth measurements (growth = moist particle diameter/dry particle diameter) and chemical composition monitoring were conducted during a 3 month period in the...
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RELATIONSHIP BETWEEN PCB PLANERITY AND INTERACTIONS WITH SOOT CARBON |
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There is increasing interest in the role of soot carbon in the strong partitioning of organic contaminants to sediments. Primary interest has been focused on PAHs which have been s...
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RELATIONSHIP BETWEEN PLANT OXIDANT STRESS AND CHANGES BELOW-GROUND: LINKING ROOT AND SOIL PROCESSES |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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RELATIONSHIP OF FLY ASH COMPOSITION, REFRACTIVE INDEX, AND DENSITY TO IN-STACK OPACITY |
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The report gives results of an investigation of the refractive index, density, and composition of fly ash from coal-fired boilers, aimed at determining: (1) the interrelationship o...
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RELATIONSHIP OF MICROBIAL COMMUNITY STRUCTURE AND CARBON DYNAMICS IN SOILS FROM BRAZILIAN SAVANNAS |
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Fertilization is a widespread management practice in savanna areas of central Brazil (Cerrado) that are undergoing rapid agricultural land use changes. We conducted field and labor...
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RELATIONSHIPS BETWEEN COMPOSITION AND PULMONARY TOXICITY OF PROTOTYPE PARTICLES FROM COAL COMBUSTION AND PYROLYSIS (MONTREAL, CANADA) |
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The hypothesis that health effects associated with coal combustion fly-ash particles are exacerbated by the simultaneous presence of iron and soot was tested through two sets of ex...
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RELATIONSHIPS BETWEEN RESIDUES OF AHR AGONISTS IN FISH AND CONCENTRATIONS IN WATER AND SEDIMENTS |
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Relationships between Residues of AhR Agonists in Fish and Concentrations in Water and Sediment. Cook, PM*, Burkhard, LP, Mount, DR, US-EPA, NHEERL, MED, Duluth, MN. The bioaccumu...
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REMEDIATION OF A MAJOR JET FUEL SPILL BY BIOSLURPER AND NATURAL BIOVENTING TECHNOLOGY ON AN ISLAND AIR BASE |
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The Indian Ocean island of Diego Garcia has served as a base for B-52 bombers. In 1991 an underground transfer pipeline fracture was discovered after a spill exceeding 200,000 gal...
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REMEDIATION OF MTBE FROM DRINKING WATER: AIR STRIPPING FOLLOWED BY OFF-GAS ADSORPTION |
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The widespread use of methyl tertiary butyl ether (MTBE) as an oxygenate in gasoline has resulted in the contamination of a large number of ground and surface water sources. Even t...
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REMOTE MONITORING OF ORGANIC CARBON IN SURFACE WATERS |
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This study shows that the intensity of the Raman normalized fluorescence emission induced in surface waters by ultraviolet radiation can be used to provide a unique remote sensing ...
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REMOVAL OF ADDED NITRATE IN THE SINGLE, BINARY, AND TERNARY SYSTEMS OF COTTON BURR COMPOST, ZEROVALENT IRON, AND SEDIMENT: IMPLICATIONS FOR GROUNDWATER NITRATE REMEDIATION USING PERMEABLE REACTIVE BARRIERS |
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Recent research has shown that carbonaceous solid materials and zerovalent iron (Fe0) may potentially be used as media in permeable reactive barriers (PRBs) to degrade groundwater ...
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REMOVAL OF ALACHLOR FROM DRINKING WATER |
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Alachlor (Lasso) is a pre-emergent herbicide used in the production of corn and soybeans. U.S. EPA has studied control of alachlor in drinking water treatment processes to define t...
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REMOVAL OF CHEMICAL AND MICROBIAL CONTAMINANTS IN DRINKING WATER - WATTS PREMIER M-2400 POINT-OF-ENTRY REVERSE OSMOSIS DRINKINGWATER TREATMENT SYSTEM |
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The Watts Premier M-2400 POE RO Drinking Water Treatment System was tested at the NSF Drinking Water Treatment Systems Laboratory for removal of the viruses fr and MS2, the bacteri...
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REMOVAL OF CHLORINATED ALKENE SOLVENTS FROM DRINKING WATER BY VARIOUS REVERSE OSMOSIS MEMBRANES |
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Historically, membranes have been used to desalinate water. As new membrane materials are developed, traditional water treatment schemes may incorporate membrane technologies, suc...
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REMOVAL OF COLOR, DETERGENTS, AND OTHER REFRACTORY SUBSTANCES FROM TEXTILE WASTEWATER |
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The report gives results of laboratory and pilot scale research to determine the effectiveness and economic feasibility of various physicochemical tertiary treatments in removing c...
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REMOVAL OF CREOSOTE FROM SOIL BY BIOSLURRY REACTORS |
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Biological slurry reactors were tested for removal of polynuclear aromatic hydrocarbons (PAHs) from creosote contaminated soil. ive bioslurry reactors, operated in parallel, kept t...
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REMOVAL OF DBCP FROM GROUNDWATER - VOLUME 2 - FIELD PILOT PLANT OPERATION |
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Static bottle-point and dynamic Freundlich adsorption isotherm determinations were performed on groundwaters containing different pesticide contaminants: , 2- dibromo-3-chloropropa...
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REMOVAL OF DBCP FROM GROUNDWATER. VOLUME 2. FIELD PILOT PLANT OPERATION. |
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Static bottle-point and dynamic Freundlich adsorption isotherm determinations were performed on groundwaters containing different pesticide contaminants: 1, 2- dibromo-3-chloroprop...
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REMOVAL OF ENDOCRINE DISRUPTING CHEMICALS USING DRINKING WATER TREATMENT PROCESSES |
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A group of chemicals, known as endocrine disrupting chemicals (EDCs), has been identified as having the potential to cause adverse health effect in humans and wildlife. Among this ...
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REMOVAL OF ENDOCRINE DISRUPTOR CHEMICALS DURING DRINKING WATER TREATMENT |
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A group of chemicals, known as endocrine disruptor chemicals (EDCs) have been identified as having the potential to cause adverse health effects in humans and wildlife. Among this ...
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REMOVAL OF ENDOCRINE DISRUPTOR CHEMICALS DURING DRINKING WATER TREATMENT (EPA/625/R-00/015) |
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A group of chemicals, known as endocrine disruptor chemicals (EDCs), has been identified as having the potential to cause adverse health effects in humans and wildlife. Among this ...
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REMOVAL OF HUMIC MATERIAL BY CONVENTIONAL TREATMENT AND CARBON |
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Disinfection byproducts are among those compounds being considered for regulation under the Safe Drinking Water Act Amendments of 1986. One of the most significant disinfection byp...
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REMOVAL OF HUMICSUBSTANCES AND ALGAE BY DISSOLVED AIR FLOTATION |
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Dissolved air flotation (DAF) is used in place of conventional gravity settling as a means to separate low density floc particles from water. The following objectives were: (1) to ...
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REMOVAL OF MICROBIAL CONTAMINANTS IN DRINKING WATER: KOCH MEMBRANE SYSTEMS, HF-82-35-PMPWâ„¢ ULTRAFILTRATION MEMBRANE |
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Two Koch Membrane Systems HF-82-35-PMPW ultrafiltration membrane cartridges were tested for removal of viruses, bacteria, and protozoan cysts at NSF’s Drinking Water Treatment Syst...
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REMOVAL OF MTBE FROM WATER WITH ZEOLITES |
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MTBE has impacted public drinking water wells from releases of gasoline making the water non-potable. MTBE is highly soluble in water, has a low volatility, does not adsorb strongl...
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REMOVAL OF MUTAGENS FROM DRINKING WATER BY GRANULAR ACTIVATED CARBON: EVALUATION USING BACTERIAL MUTAGENICITY TESTS |
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The performance of a full-scale granular activated carbon (GAC) treatment system in removing mutagens from drinking water obtained from the Ohio River has been evaluated using two ...
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REMOVAL OF NITROAROMATIC COMPOUNDS FROM AN ARTIFICIAL GROUNDWATER BY GRANULAR ACTIVATED CARBON (GAC). II. THE EFFECTS OF BACKGROUND DISSOLVED ORGANIC MATTER. (R826694C636) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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REMOVAL OF ORGANIC CCL CONTAMINANTS FROM DRINKING WATERS BY ENHANCED COAGULATION, POWDERED ACTIVATED CARBON, CHEMICAL SOFTENING, AND OXIDATION |
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The 1996 amendments to the Safe Drinking Water Act (SWDA) require the US Environmental Protection Agency (USEPA) to establish a list of unregulated microbiological and chemical con...
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REMOVAL OF ORGANIC CCL CONTAMINANTS FROM DRINKING WATERS BY MEMBRANE AND GAC PROCESSES |
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Bench-scale treatment data for membrane and granular activated carbon technologies are presented for the organic contaminants on the U.S. Environmental Protection Agency's Contamin...
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REMOVAL OF ORGANIC CCL CONTAMINANTS FROM DRINKING WATERS BY MEMBRANE AND GAC PROCESSES |
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Bench-scale treatment data for membrane and granular activated carbon technologies are presented for the organic contaminants on the U.S. Environmental Protection Agency's Contamin...
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REMOVAL OF ORGANIC CONTAMINANTS FROM DRINKING WATER SUPPLY AT GLEN COVE, NEW YORK, PHASE II |
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This research program was initiated with the overall objective of obtaining relevant design parameters and capital and operating costs of both adsorption and aeration techniques fo...
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REMOVAL OF ORGANICS FROM DRINKING WATER |
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Organic contamination of drinking water is basically caused by two general classes of organics; man-made synthetic organics and disinfection of naturally occurring organics (disinf...
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REMOVAL OF POLYNUCLEAR AROMATIC HYDROCARBONS FROM PRIMARY ALUMINUM AIR POLLUTION CONTROL SCRUBBER WASTEWATER |
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A pilot-scale study was conducted at a primary aluminum plant to evaluate the removal of benzo(a)pyrene and other polynuclear aromatic hydrocarbons (PAH's) from potline scrubber wa...
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REMOVAL OF SYNTHETIC ORGANIC CHEMICAL CONTAMINANTS IN DRINKING WATER: RASCO, INC. ADVANCED SIMULTANEOUS OXIDATION PROCESS (ASOP) |
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The RASco, Inc. ASOP Drinking Water Treatment Module was tested at NSF’s Laboratory for the reduction of the following chemicals of concern: aldicarb, benzene, carbofuran, chlorof...
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REMOVAL OF TASTE- AND ODOR-CAUSING COMPOUNDS BY BIOFILMS GROWN ON HUMIC SUBSTANCES |
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Laboratory experiments showed that biodegradation of taste- and odor-causing compounds by biofilms grown on natural humic materials is feasible. Although the mineralization of peat...
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REMOVAL OF VOLATILE ORGANIC CONTAMINANTS FROM GROUND WATER |
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Because ground water is a source of potable water for millions of people, an economical means of removing volatile organic contaminants is essential. Laboratory, pilot-scale and fu...
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REMOVAL OF VOLATILE ORGANIC CONTAMINANTS FROM GROUND WATER BY ADSORPTION |
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Laboratory and field studies are underway to determine the effectiveness of activated carbon for removing volatile organic compounds from ground water. For fifteen C1 through C6 co...
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REMOVING ORGANIC CONTAMINANTS OF REGULATORY INTEREST WITH MEMBRANE PROCESSES: USEPA'S SCREENING STUDIES |
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The 1996 amendments to the Safe Drinking Water Act require the US Environmental Protection Agency (USEPA) to establish a list of unregulated microbiological and chemical contaminan...
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REMOVING ORGANICS FROM PHILADELPHIA DRINKING WATER BY COMBINED OZONATION AND ADSORPTION |
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This project was conducted on both a pilot and laboratory scale to understand the effects of ozonation and the relationship between adsorption and biological activity during water ...
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REMOVING POTENTIAL ORGANIC CARCINOGENS AND PRECURSORS FROM DRINKING WATER. VOLUME II. APPENDIX B. RAW DATA TABLES |
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Feasible and economical methodologies were needed to remove existing organic contaminants--specifically, four trihalomethanes (chloroform, bromodichloromethane, chlorodibromomethan...
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REMOVING SYNTHETIC ORGANIC CHEMICALS FROM DRINKING WATER BY GRANULAR ACTIVATED CARBON: PERFORMANCE AND COST |
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GAC has been shown to be an effective adsorbent for removing many of the SOCs scheduled for regulation and to be an effective broad-spectrum adsorbent. U.S. EPA data presented in t...
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REMOVING TRIHALOMETHANES FROM DRINKING WATER - AN OVERVIEW OF TREATMENT TECHNIQUES |
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In 1974 trihalomethanes (chloroform, bromodichloromethane, dibromochloromethane, and bromoform) were discovered to be formed during the disinfection step of drinking water if free ...
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REMOVING WATER-SOLUBLE HAZARDOUS MATERIAL SPILLS FROM WATERWAYS WITH CARBON |
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A model for the removal of water-soluble organic materials from water by carbon-filled, buoyant packets and panels is described. Based on this model, equations are derived for the ...
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REPORT TO CONGRESS: ASSESSMENT OF INTERNATIONAL AIR POLLUTION PREVENTION AND CONTROL TECHNOLOGY VOLUME 1. EXECUTIVE SUMMARY |
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The report gives results of a study that identifies new and innovative air pollution prevention and/or control technologies, of selected industrialized countries, that are not curr...
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REPORT TO CONGRESS: ASSESSMENT OF INTERNATIONAL AIR POLLUTION PREVENTION AND CONTROL TECHNOLOGY VOLUME 2. TECHNICAL REPORT |
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The report gives results of a study that identifies new and innovative air pollution prevention and/or control technologies, of selected industrialized countries, that are not curr...
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REPRODUCTIVE DEHALOGENATION OF CHLORINATED METHANES BY IRON METAL |
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Reduction of chlorinated solvents by fine-grained iron metal was studied in well-mixed anaerobic batch systems in order to help assess the utility of this reaction in remediation o...
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RESEARCH ACTIVITIES IN DRINKING WATER TECHNOLOGY: A PROGRESS REPORT |
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The Safe Drinking Water Act and its Amendments (SDWAA) have given EPA an aggressive standard setting agenda. The agenda, if carried out fully, will impact on water utilities in the...
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RESEARCH NEEDS FOR RISK ASSESSMENT OF INHALED PARTICULATE MATTER: REPORT OF A WORKSHOP |
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Recent studies have shown that insoluble, biochemically inert particles, small enough to deposit in the deep lung, are capable of inducing carcinogenic as well as pathological effe...
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RESEARCH STRATEGY FOR OXYGENATES IN WATER (WORKSHOP REVIEW DRAFT) |
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This draft document was the subject of a workshop held in Washington, DC on October 7, 1997.
Because of public interest in the subject of oxygenates in water, this workshop draft v...
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RESOLUTION AND ERROR IN MEASURING LAND-COVER CHANGE: EFFECTS ON ESTIMATING NET CARBON RELEASE FROM MEXICAN TERRESTRIAL ECOSYSTEMS |
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Reliable estimates of carbon exchange between terrestrial ecosystems and the atmosphere due to land-use change have become increasingly important. One source of land-use changes es...
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RESPIRABLE PARTICLES AND MISTS IN MOUSE PULMONARY INFECTIVITY MODEL. EFFECT OF CHRONIC OR INTERMITTENT EXPOSURE |
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The effects of respirable-sized sulfuric acid mist or mixtures containing acid mist and carbon particles (A-C) on the susceptibility to bacterial and viral respiratory infection we...
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RESPIRATION AND SUBSTRATE USE IN EXCISED PONDEROSA PINE ROOTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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RESPIRATORY-CARDIOVASCULAR PHYSIOLOGY AND CHLOROETHANE GILL FLUX IN THE CHANNEL CATFISH ICTALRUS PUNCTATUS |
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A fish respirometer-metabolism chamber was used to obtain in ivo respiratory-cardiovascular and chloroethane gill flux data on transected channel catfish (Ictalrus punctatus). etho...
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RESPIROMETER WITH CONTROLLED WATER QUALITY AND COMPUTERIZED DATA ACQUISITION FOR EXPERIMENTS WITH SWIMMING FISH |
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This paper describes the design of a modified Brett-type respirometer for use with fish up to 2 kg at swimming speeds as high as 2.5 m/sec. ontrol of the respirometer, experimental...
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RESPIROMETRY AS A TOOL TO DETERMINE METAL TOXICITY IN A SULFATE REDUCING BACTERIAL CULTURE |
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A novel method under development for treatment of acid mine drainage waste uses biologically- generated hydrogen sulfide (H2S) to precipitate the metals in acid mine drainage (prin...
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RESPONSE AND FEEDBACKS OF FOREST ECOSYSTEMS TO GLOBAL CLIMATE CHANGE |
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The accumulation of greenhouse gases in the atmosphere over the past century is projected to cause a warming of the Earth. Climate Change predictions vary by region and terrestrial...
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RESPONSE AND FEEDBACKS OF FOREST SYSTEMS TO GLOBAL CLIMATE CHANGE |
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The purpose of this report is to summarize present knowledge in three areas: orest responses to climate change; the role of forest feedbacks to the atmosphere; and the potential of...
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RESPONSE OF GHOST SHRIMP (NEOTRYPAEA CALIFORNIENSIS) BIOTURBATION TO ORGANIC MATTER ENRICHMENT OF ESTUARINE INTERTIDAL SEDIMENTS |
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Populations of burrowing shrimp (Neotrypaea californiensis and Upogebia p;ugettensis) are the dominant invertebrate fauna on Pacific estuarine tide flats, occupying >80% of interti...
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RESPONSE OF NUTRIENTS, BIOFILM, AND BENTHIC INSECTS TO SALMON CARCASS ADDITION |
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Salmon carcass addition to streams is expected to increase stream productivity at multiple trophic levels. This study examined stream nutrient (nitrogen, phosphorus, and carbon), ...
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RESPONSE OF SOIL MICROBIAL BIOMASS AND COMMUNITY COMPOSITION TO CHRONIC NITROGEN ADDITIONS AT HARVARD FOREST |
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Soil microbial communities may respond to anthropogenic increases in ecosystem nitrogen (N) availability, and their response may ultimately feedback on ecosystem carbon and N dynam...
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RESPONSE OF STOMATAL CONDUCTANCE TO DROUGHT IN PONDEROSA PINE: IMPLICATIONS FOR CARBON AND OZONE UPTAKE. (R826601) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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RESPONSE OF TALL FESCUE, BUSH BEAN, AND MAIZE TO CHROME TANNERY SLUDGE IN SOILS |
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Tannery sludge was compared with commercial nitrogen fertiliser to investigate its potential use as an alternative to commercial fertiliser. Soils containing 38% and 7% organic car...
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RESPONSE OF THREE PALEO-PRIMARY PRODUCTION PROXY MEASURES TO DEVELOPMENT OF AN URBAN ESTUARY |
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In this study we present a novel comparison of three proxy indicators of paleoproductivity, pigments, biogenic silica (BSi), and cysts of autotrophic dinoflagellates measured in co...
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RESPONSES AND FEEDBACK TO GLOBAL FORESTS TO CLIMATE CHANGE |
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The accumulation of greenhouse gases in the atmosphere over the past century is projected to cause a warming of the Earth. limate change predictions vary by region and terrestrial ...
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RESTORED STREAMS ENHANCE ABILITY TO REMOVE EXCESS NITROGEN |
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Issue: Excess nitrogen from fertilizer, septic tanks, animal feedlots, and runoff from pavement can threaten human and aquatic ecosystem health. Furthermore, degraded ecosystems l...
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RESULTS OF THE CARBON MONOXIDE STUDY IN WASHINGTON, D.C., AND DENVER, COLORADO, IN THE WINTER OF 1982-83 |
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The paper will briefly describe the study of population exposure to carbon monoxide for the residents of the Washington, D.C., area and the Denver, Colorado, area in the winter of ...
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RETENSION AND TRANSFORMATION OF SELECTED PESTICEDES AND PHOSPHORUS IN SOIL-WATER SYSTEMS: A CRITICAL REVIEW |
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The current state-of-the-art for measuring or estimating pesticide retention and transformation parameters required in nonpoint source pollution models was reviewed. A data base of...
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RETENTION OF HALOCARBONS ON A HEXAFLUOROPROPYLENE-EPOXIDE MODIFIED GRAPHITIZED CARBON BLACK - IV. PROPANE-BASED COMPOUNDS |
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The paper gives results of a study of the retention characteristics of 24 propane-based bromofluorocarbon, chlorocarbon, chlorofluorocarbon, and fluorocarbon fluids, as a function ...
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REVENUE RECYCLING AND THE COSTS OF REDUCING CARBON EMISSIONS. (R825313) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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REVERSED-PHASE SEPARATION OF ESTUARINE INTERSTITIAL WATER FRACTIONS AND THE CONSEQUENCES OF C18 RETENTION OF ORGANIC MATTER |
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Data are presented on the application of the reversed-phase separation technique for the determination of dissolved organic compounds in estuarine interstitial water. hirty-seven n...
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REVIEW OF METHODS THAT ARE USED TO DETERMINE 'GIARDIA' CYST VIABILITY |
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Over the past 55 years a number of methods have been described for excysting Giardia cysts as a means of determining viability. The excystation methods for G. muris cysts are relia...
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REVIEW OF NAPAP INTEGRATED ASSESSMENT: VISIBILITY |
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The National Acid Precipitation Program (NAPAP) Integrated Assessment discussion of visibility, and its more detailed supporting document, State-of-Science/Technology (SOS/T) Repor...
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REVIEW OF TREATMENT FOR METAL HAZARDOUS WASTESTREAMS |
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This publication will examine some of the practices being used or considered for use at on-site or commercial hazardous waste treatment, storage and disposal facilities (TSDF). pti...
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REVIEW OF TREATMENT METHODS FOR REMOVAL OF URANIUM FROM DRINKING WATER |
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The paper summarizes recent information on the effectiveness of various methods for uranium removal from drinking water supplies. A variety of methods have been studied and reporte...
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REVIEW OF UCR (UNIVERSITY OF CALIFORNIA-RIVERSIDE) PROTOCOL FOR DETERMINATION OF OH (HYDROXYL RADICALS) RATE CONSTANTS WITH VOC (VOLATILE ORGANIC CHEMICALS) AND ITS APPLICABILITY TO PREDICT PHOTOCHEMICAL OZONE PRODUCTION |
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The experimental protocol for determining the rate constants for reactions of hydroxyl radicals (OH) with volatile organic chemicals (VOCs) as developed by the University of Califo...
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REVISED EVALUATION OF HEALTH EFFECTS ASSOCIATED WITH CARBON MONOXIDE EXPOSURE: AN ADDENDUM TO THE 1979 U.S. EPA AIR QUALITY CRITERIA DOCUMENT FOR CARBON MONOXIDE |
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The addendum re-evaluates the scientific data base concerning health effects associated with exposure to carbon monoxide (CO) at ambient or near ambient levels by providing: (1) a ...
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RIPARIAN BUFFER WIDTH, VEGETATIVE COVER, AND NITROGEN REMOVAL EFFECTIVENESS: A REVIEW OF CURRENT SCIENCE AND REGULATIONS |
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Riparian zones, the vegetated region adjacent to streams and wetlands, are thought to be effective at intercepting and controlling nitrogen loads entering water bodies. Buffer wid...
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RISING ATMOSPHERIC CO2 AND CARBON SEQUESTRATION IN FORESTS |
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Rising CO2 concentrations in the Earth's atmosphere could alter Earth's climate system, but it is thought that higher concentrations may improve plant growth by way of the fertiliz...
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RISING ATMOSPHERIC CO2 AND CARBON SEQUESTRATION IN FORESTS |
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A growing number of public officials, scientists, and members of the public and private sector suggest that the effects of climate change could affect the environment and economy o...
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RIVERBANK FILTRATION: FATE OF DBP PRECURSORS AND SELECTED MICROORGANISMS |
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The fate of disinfection by-product (DBP) precursors and selected microorganisms during riverbank filtration (RBF) was monitored at three different mid-Western drinking water utili...
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ROLE OF BIOMASS ENERGY IN STABILIZING GLOBAL CLIMATE CHANGE |
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The paper discusses the causes, effects, and options for stabilizing global climate change, with an emphasis on the global use of biomass energy as a feasible stabilization option....
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ROLE OF BLACK CARBON IN THE PARTITIONING AND BIOAVAILABILITY OF ORGANIC POLLUTANTS |
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An editorial in the journal Environmental Toxicology and Chemistry provides a historical overview of our understanding of how organic contaminants like PCBs and PAHs behave geochem...
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ROLE OF CELL SIGNALING IN PROTECTION FROM DIESEL AND LPS INDUCED ACUTE LUNG INJURY |
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We have previously demonstrated in CD-1 mice that pre-administration of N-acetyl cysteine (NAC) or the p38 MAP kinase inhibitor (SB203580) reduces acute lung injury and inflammatio...
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ROLE OF HCL IN ADSORPTION OF ELEMENTAL MERCURY VAPOR BY CALCIUM-BASED SORBENTS |
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The paper gives results of a study to identify active sites and surface functional groups that may contribute to the adsorption of elemental mercury (Hg?) by relatively inexpensive...
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ROLE OF HEPATOCELLULAR REGENERATION IN CHLORDECONE POTENTIATED HEPATOTOXICITY OF CARBON TETRACHLORIDE |
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Previous studies have demonstrated perturbation of Ca2+ -homeostasis, depletion of glycogen levels and arrested hepatocellular division leading to progression of hepatic lesion wit...
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ROLE OF MTBE MNA IN UNDERSTANDING THE SIGNIFICANCE OF SMALL RELEASES |
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There are a variety of processes that can contribute the natural attenuation of MTBE in ground water that has been impacted by a small release of gasoline. The contribution of aer...
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ROLE OF NITROGEN OXIDES IN NONURBAN OZONE FORMATION IN THE PLANETARY BOUNDARY LAYER OVER N (NORTH) AMERICA, W (WESTERN) EUROPE AND ADJACENT AREAS OF OCEAN |
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The status of knowledge on photochemical ozone formation and the effects of nitrogen oxides and peroxyacyl nitrates on such formation has been evaluated. The literature is reviewed...
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ROLE OF SOURCE MATRIX IN THE BIOAVAILABILITY OF POLYCYCLIC AROMATIC HYDROCARBONS TO DEPOSIT-FEEDING BENTHIC INVERTEBRATES |
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The bioavailability of polycyclic aromatic hydrocarbons (PAHs) to benthic organisms is complicated by the variety of ways that they are introduced to coastal waters (dissolved, as ...
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ROLE OF SURFACE FUNCTIONAL GROUPS IN THE CAPTURE OF ELEMENTAL MERCURY AND MERCURIC CHLORIDE BY ACTIVATED CARBONS |
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The paper discusses using a laboratory-scale, fixed bed apparatus to study the role of surface functional groups (SFGs) in the capture of mercuric chloride (HgC12) and elemental me...
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ROOT BIOMASS ALLOCATION IN THE WORLD'S UPLAND FORESTS |
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Because the world's forests play a major role in regulating nutrient and carbon cycles, there is much interest in estimating their biomass. Estimates of aboveground biomass based o...
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ROOT DETACHMENT, DEVELOPMENTAL STAGE, AND SHOOT LIGHT ENVIRONMENT AS DETERMINANTS OF ROOT RESPIRATION IN PONDEROSA PINE |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ROOT GROWTH AND TURNOVER IN DIFFERENT AGED PONDEROSA PINE STANDS IN OREGON, USA |
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The impacts of pollution and climate change on soil carbon dynamics are poorly understood, in part due to a lack of information regarding root production and turnover in natural ...
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ROTATING BIOLOGICAL CONTRACTORS - HYDRAULIC VERSUS ORGANIC LOADING |
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Conventional and alternative flow configurations of rotating biological contractors were compared for soluble organic carbon and ammonia-nitrogen removal. Each treatment train cont...
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ROY F. WESTON, INC. AND IEG TECHNOLOGIES CORPORATION UNTERDRUCK-VERDAMPFER-BRUNNEN (UVB) TECHNOLOGY; INNOVATIVE TECHNOLOGY EVALUATION REPORT |
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This report summarizes the findings of an evaluation of the Unterdruck-Verdampfer-Brunnen (UVB) technology developed by IEG Technologies and demonstrated in association with Roy F....
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Rain Garden Research at EPA’s Urban Watershed Research Facility: Promoting Nitrate Removal through Rain Garden Design |
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Rain gardens are designed to infiltrate stormwater, capture suspended solids, sorb heavy metals and phosphorus, and transform nutrients through biological processes. Most studies ...
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Reactive Fe/Pd Bimetallic Systems-Impregnated Adsorptive Activated Carbon For The Environmental Risk Management Of Contaminated Sites |
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Remediation of sediments and groundwater contaminated with hydrophobic organic chemicals such as polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons remains a sci...
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Relationships between composition and pulmonary toxicity of prototype particles from coal combustion and pyrolysis |
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The hypothesis that health effects associated with coal combustion fly-ash particles are exacerbated by the simultaneous presence of iron and soot was tested through two sets of ex...
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Revisiting the pH Effect on Orthophosphate Control of Plumbosolvency |
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Although solubility models for Pb(II) have largely been successful for giving corrosion control treatment guidance for over 2 decades, very little systematic research has been done...
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Risk Reduction in the Synthesis of Nanomaterials: Green Approach to Noble Metal Nanostructures and Nanocomposites |
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A brief account of greener production of nanoparticles which reduces or eliminates the use and generation of hazardous substances is presented. The utility of vitamins B1 |
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Risk Reduction via Greener Synthesis of Noble Metal Nanostructures and Nanocomposites |
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A brief account of greener production of nanoparticles which reduces or eliminates the use and generation of hazardous substances is presented. The utility of vitamins B1 and B2, w...
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SALE OF SURPLUS DIGESTER AND LANDFILL GAS TO PUBLIC UTILITIES |
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Methane gas produced by anaerobic digestion of wastewater sludge can be upgraded to pipeline quality and sold to a public utility for injection into a natural gas distribution syst...
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SAMPLE CHARACTERIZATION OF AUTOMOBILE AND FORKLIFT DIESEL EXHAUST PARTICLES AND COMPARATIVE PULMONARY TOXICITY IN MICE |
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Abstract
Two samples of diesel exhaust particles (DEP) predominate in DEP health effects research: an automobile-source DEP (A-DEP) sample and the National Institute of...
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SAMPLING AND ANALYSIS EXPERIMENTS FOR IMPROVED CHARACTERIZATION OF PRODUCTS OF INCOMPLETE COMBUSTION |
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Laboratory and field experiments were conducted to evaluate the Volatile Organic Sampling Train (VOST) methodology for the sampling and analysis of products of incomplete combustio...
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SAMPLING AND ANALYSIS OF ATMOSPHERIC AEROSOLS |
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Sampling and analysis requirements for the characterization of ambient particles are reviewed. The choice of sampling equipment and characterization procedures for ambient particle...
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SAMPLING AND CARBONACEOUS AEROSOLS: A REVIEW OF METHODS AND PREVIOUS MEASUREMENTS |
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Carbonaceous aerosols, a complex mixture of carbonate carbon, elemental carbon and organic carbon (organic compounds), are of environmental importance due to their impact on visibi...
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SAMPLING ARTIFACTS IN MEASUREMENT OF ELEMENTAL AND ORGANIC CARBON: LOW VOLUME SAMPLING IN INDOOR AND OUTDOOR ENVIRONMENTS |
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Experiments were completed to determine the extent of artifacts from sampling elemental carbon (EC) and organic carbon (OC) under sample conditions consistent with personal samplin...
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SAMPLING DURATION DEPENDENCE OF SEMI-CONTINUOUS ORGANIC CARBON MEASUREMENTS ON STEADY STATE SECONDARY ORGANIC AEROSOLS |
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Semi-continuous organic carbon concentrations were measured through several experiments of statically generated secondary organic aerosol formed by hydrocarbon + NOx irradiations. ...
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SAND/GRANULAR CARBON FILTRATION TREATMENT SYSTEM FOR REMOVING AQUEOUS PESTICIDE RESIDUES FROM A MARINE TOXICOLOGY LABORATORY EFFLUENT |
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Flow-through toxicity tests using marine organisms can generate large volumes of contaminated sea water effluent which should be treated to remove the contaminants before being dis...
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SCALE-UP OF RAPID SMALL-SCALE ADSORPTION TESTS TO FIELD-SCALE ADSORBERS: THEORETICAL BASIS AND EXPERIMENTAL RESULTS FOR A CONSTANT DIFFUSIVITY |
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Granular activated carbon (GAC) is an effective treatment technique for the removal of some toxic organics from drinking water or wastewater, however, it can be a relatively expens...
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SCIENTIFIC LINKAGES IN GLOBAL CHANGE |
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In the atmosphere, certain trace gases both promote global warming and deplete the ozone layer. he primary radiatively active trace gases, those that affect global warming, are car...
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SCREEN-PRINTED TYROSINASE-CONTAINING ELECTRODES FOR THE BIOSENSING OF ENZYME INHIBITORS |
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Disposal amperometric inhibition biosensors have been microfabricated by screen printing a tyrosinase-containing carbon ink. The decrease in the substrate (catechol) steady-state c...
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SEAGRASS RHIZOSPHERE MICROBIAL COMMUNITIES |
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Devereux, Richard. 2005. Seagrass Rhizosphere Microbial Communities. In: Interactions Between Macro- and Microorganisms in Marine Sediments. E. Kristense, J.E. Kostka and R.H. Haes...
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SEASONAL AND REGIONAL VARIATIONS OF PRIMARY AND SECONDARY ORGANIC AEROSOLS OVER THE CONTINENTAL UNITED STATES: OBSERVATION-BASED ESTIMATES AND MODEL EVALUATION |
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Due to the lack of an analytical technique for directly quantifying the atmospheric concentrations of primary (OCpri) and secondary (OCsec) organic carbon aer...
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SEASONAL AND REGIONAL VARIATIONS OF PRIMARY AND SECONDARY ORGANIC AEROSOLS OVER THE CONTINENTAL UNITED STATES: SEMI-EMPIRICAL ESTIMATES AND MODEL EVALUATION |
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Seasonal and regional variations of primary (OCpri) and secondary (OCsec) organic carbon aerosols across the continental U.S. for the year 2001 were examined ...
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SEASONAL CHANGES IN ROOT AND SOIL RESPIRATION OF OZONE-EXPOSED PONDEROSA PINE (PINUS PONDEROSA) GROWN IN DIFFERENT SUBSTRATES |
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Exposure to(ozone 0-3)has been shown to decrease the allocation of carbon to tree roots. Decreased allocation of carbon to roots might disrupt root metabolism and rhizosphere organ...
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SEASONAL DYNAMICS OF PCB ACCUMULATION IN A GREAT LAKES FOOD WEB. (R825151) |
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Seston, sediment, settling organic matter, and food web members were
collected from Grand Traverse Bay, Lake Michigan, between April 1997 and
September 1998 to examine P...
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SEASONAL IMPACT OF BLENDING OXYGENATED ORGANICS WITH GASOLINE IN MOTOR VEHICLE TAILPIPE AND EVAPORATIVE EMISSIONS |
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The evaporative and exhaust emissions from a 1988 GM Corsica with adaptive learning were measured with 4 fuels at 40 degrees F, 75 degrees F, and 90 degrees F. Test fuels were unle...
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SEASONAL MODELING OF THE EXPORT OF POLLUTANTS FROM NORTH AMERICA USING THE MULTI-SCALE AIR QUALITY SIMULATION PLATFORM (MAQSIP) |
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Attention in recent years has focused on the trans-boundary transport of ozone and fine particulate matte between the United States and Mexico and Canada and across state boundarie...
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SEASONAL PATTERNS OF PHOTOSYNTHESIS IN DOUGLAS FIR SEEDLINGS DURING THE THIRD AND FOURTH YEAR OF EXPOSURE TO ELEVATED CO2 AND TEMPERATURE |
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We examined the interactive effects of elevated atmospheric CO2 and temperature on seasonal patterns of photosynthesis in Douglas-fir (Psuedotsuga menziesii (Mirb.) Franco) seedlin...
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SEASONAL SOIL FLUXES OF CARBON MONOXIDE IN BURNED AND UNBURNED BRAZILIAN SAVANNAS |
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Soil-atmosphere fluxes of carbon monoxide (CO) were measured from September 1999 through November 2000 in savanna areas in central Brazil (Cerrado) under different fire regimes usi...
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SEASONAL VARIATION IN THE BIOGEOCHEMICAL CYCLING OF SESTON IN GRAND TRAVERSE BAY, LAKE MICHIGAN. (R825151) |
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This study describes the biogeochemical cycling of seston in Grand Traverse Bay, Lake Michigan. Seston was characterized by carbon and nitrogen elemental and isotopic abundances. F...
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SEASONAL VARIATION OF THE PARTICLE SIZE DISTRIBUTION OF POLYCYCLIC AROMATIC HYDROCARBONS AND OF MAJOR AEROSOL SPECIES IN CLAREMONT, CALIFORNIA. (R827352C020) |
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As part of the Southern California Particle Center and Supersite (SCPCS) activities, we measured, during all seasons, particle size distributions of 12 priority pollutant polycy...
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SEASONAL VARIATIONS IN ELEMENTAL CARBON AEROSOL, CARBON MONOXIDE, AND SULFUR DIOXIDE: IMPLICATIONS FOR SOURCES. (R826373) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SEASONAL VARIATIONS OF STABLE HYDROGEN AND CARBON ISOTOPE RATIOS OF METHANE IN SUBTROPICAL FRESHWATER SEDIMENTS |
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Stable hydrogen (D) and carbon (13C) isotope ratios of sedimentary methane from five subtropical Florida freshwater sites exhibited smaller, less distinct seasonal variations than ...
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SECOND PERFORMANCE AUDIT OF INSPECTION AND MAINTENANCE CALIBRATION GASES |
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The purpose of the audit was to determine the accuracy of calibration gases being used by state and local inspection and maintenance (I/M) programs. Forty-six calibration gas cylin...
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SECONDARY ORGANIC AEROSOL FORMATION FROM THE IRRADIATION OF SIMULATED AUTOMOBILE EXHAUST |
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A laboratory study was conducted to evaluate the potential for secondary organic aerosol formation from emissions from automotive exhaust. The goal was to determine to what exten...
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SECONDARY ORGANIC AEROSOL FORMATION FROM THE OXIDATION OF AROMATIC HYDROCARBONS IN THE PRESENCE OF DRY SUBMICRON AMMONIUM SULFATE AEROSOL |
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A laboratory study was conducted to examine formation of secondary organic aerosols. A smog chamber system was developed for studying gas-aerosol interactions in a dynamic flow r...
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SECONDARY ORGANIC CARBON AND AEROSOL YIELDS FROM THE IRRADIATIONS OF ISOPRENE AND á-PINENE IN THE PRESENCE OF NO X AND SO 2 |
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A laboratory study was carried out to investigate the secondary organic carbon (SOC) yields of a-pinene and isoprene in the presence of SO2, which produces acidic aeroso...
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SEDIMENT GEOCHEMICAL MODEL |
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Until recently, sediment geochemical models (diagenetic models) have been only able to explain sedimentary flux and concentration profiles for a few simplified geochemical cycles (...
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SEDIMENT TOXICITY EVALUATION OF EXTRACTS OF ORGANIC CHEMICALS FROM CONTAMINATED SEDIMENTS: EVALUATION OF AN EXPERIMENTAL APPROACH |
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Most solid-phase sediment TIE techniques for organic chemicals have been focused on the addition of sorbents, such as the carbonaceous resin, Ambersorb 1500. While these sorbents h...
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SEDIMENT TOXICITY, CONTAMINATION AND AMPHIPOD ABUNDANCE AT A DDT- AND DIELDRIN-CONTAMINATED SITE IN SAN FRANCISCO BAY |
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Sediment toxicity to the amphipod Eohaustorius estuarius, sediment contamination, and the abundance of amphipods were examined along a contamination gradient in the Lauritzen Chann...
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SEDIMENT- AND SATURATED-SOIL-ASSOCIATED REACTIONS INVOLVING AN ANIONIC SURFACTANT (DODECYLSULFATE) 2. PARTITION OF PAH COMPOUNDS AMONG PHASES |
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The distribution of either pyrene, phenanthrene, or naphthalene between several different sediment or soil solid phases (media) and aqueous phases containing dodecylsulfate (DS) mi...
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SEEDLING RESPONSE TO SULFUR, NITROGEN, AND ASSOCIATED POLLUTANTS |
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In 1986, the National Acid Precipitation Assessment Program (NAPAP) established the Forest Response Program (FRP) to assess the effects of acidic deposition and associated pollutan...
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SELECTION OF A PSEUDOMONAS CEPACIA STRAIN CONSTITUTIVE FOR THE DEGRADATION OF TRICHLOROETHYLENE |
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Tn5 insertion mutants of pseudomonas cepacia G4 were produced and were unable to degrade trichloroethylene (TCE), toluene, or phenol or to transform m-trifluoromethyl phenol (TEMP)...
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SELECTIVE EXTRACTION OF OXYGENATES FROM SAVORY AND PEPPERMINT USING SUBCRITICAL WATER. (R825394) |
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The yields of oxygenated and non-oxygenated flavour and fragrance compounds from savory (Satureja hortensis) and peppermint (Mentha piperita) were compared using subcritical water ...
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SELECTIVE HYDROGENATION OF ANHYDRIDES TO LACTONES UNDER SUPERCRITICAL CARBON DIOXIDE MEDIUM |
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Selective Hydrogenation of Anhydrides to Lactones Under Supercritical Carbon Dioxide Medium
Endalkachew Sahle-Demessie Unnikrishnan R Pillai
U.S. EPA , 26 W. Martin Luthe...
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SELECTIVE HYDROGENATION OF MALEIC ANHYDRIDE TO Y-BUTROLACTONE OVER PD/AL2O3 CATALYST USING SUPERCRITICAL CARBON DIOXIDE MEDIUM |
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Hydrogenation of maleic anhydride to g-butyrolactone over Pd/Al2O3 catalyst under supercritical carbondioxide medium
Unnikrishnan R. Pillai and Endalkachew Sahle-Demessie |
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SELECTIVE HYDROGENATION OF MALEIC ANHYDRIDE TO Y-BUTROLACTONE OVER PD/AL2O3 CATALYST USING SUPERCRITICAL CARBON DIOXIDE MEDIUM: JOURNAL ARTICLE |
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NRMRL-STD- 0024A Pillai**, U.R., and Sahle-Demessie*, E. Selective Hydrogenation of Maleic Anhydride to y-butrolactone over Pd/Al2O3 Catalyst using Supercritical Carbon Dioxide Me...
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SELECTIVE HYDROGENATION OF MALEIC ANHYDRIDE TO Y-BUTYROLACTONE OVER PD/AL(2)O(3) CATALYST USING SUPERCRITICAL CO(2) AS SOLVENT |
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A selective hydrogenation of maleic anhydride to either y-butyrolactone or succinic anhydride over simple Pd/Al(2)O(3) catalyst under supercritical CO(2) medium is described for th...
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SELECTIVE OXIDATION IN SUPERCRITICAL CARBON DIOXIDE USING CLEAN OXIDANTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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SELECTIVE OXIDATION IN SUPERCRITICAL CARBON DIOXIDE USING CLEAN OXIDANTS |
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We have systematically investigated heterogeneous catalytic oxidation of different substrates in supercritical carbon dioxide (SC-CO2). Three types of catagysts: a metal complex, 0...
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SELECTIVE OXIDATION OF ALCOHOLS - COMPARING DIFFERENT CATALYTIC PROCESSES |
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Oxidation of alcohols to aldehydes, ketones or carboxylic acids is one of the most desirable chemical transformations in organic synthesis as these products are important precursor...
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SELECTIVE OXIDATION OF STYRENE TO ACETOPHENONE IN PRESENCE OF IONIC LIQUIDS |
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Palladium-catalyzed oxidation of styrene (Wacker reaction) in the presence of 1,3-dialkylimidazolium cation based ionic liquids is described. The effect of temperature, use of co-c...
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SELF-ASSEMBLY CARBON NANOTUBES IN A MICROTRAP FOR ON-LINE PRECONCENTRATION OF VOLATILE ORGANICS. (R830901) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SEMI-CONTINUOUS AEROSOL CARBON MEASUREMENTS: COMPARISON OF ATLANTA SUPERSITE MEASUREMENTS |
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An intensive field campaign of the Atlanta Supersite Experiment was carried out at a ground-based measurement site on Jefferson Street in midtown Atlanta, GA, from 3 August to 1 ...
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SEMI-EMPIRICAL ESTIMATION OF SORPTION OF HYDROPHOBIC POLLUTANTS ON NATURAL SEDIMENTS AND SOILS |
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Methods were developed for estimating the equilibrium sorption behavior of hydrophobic pollutants. At low pollutant concentration (aqueous phase concentrations less than half the s...
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SENSITIVITY ANALYSIS AND THE DESIGN OF GAS UPTAKE INHALATION STUDIES |
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Gas uptake studies analyzed by physiologically based pharmacokinetic (PBPK) models have been used to estimate metabolic parameters for many volatiles. he metabolic constants Vmax, ...
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SENSITIVITY OF CARBON SEQUESTRATION COSTS TO ECONOMIC AND BIOLOGICAL UNCERTAINTIES. (R828745) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SENSITIVITY OF PACIFIC NORTHWEST WATER RESOURCES TO GLOBAL WARMING |
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The potential effect of increasing atmospheric concentrations of carbon dioxide and other so-called greenhouse gases on the land surface environment is not well understood. sing th...
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SENSITIVITY OF THE REGIONAL OXIDANT MODEL TO AN ASSORTMENT OF EMISSION SCENARIOS |
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This paper examines the sensitivity of the Regional Oxidant Model (version 2.2) to changes in emissions. he model is applied to a domain covering most of the eastern United States ...
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SENSITIVITY OF THE US CORN BELT TO CLIMATE CHANGE AND ELEVATED CO2: II. SOIL EROSION AND ORGANIC CARBON |
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NO ABSTRACT PROVIDED...
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SENSORY, SYMPTOMATIC, INFLAMMATORY, AND OCULAR RESPONSES TO AND THE METABOLISM OF METHYL TERTIARY BUTYL ETHER IN A CONTROLLED HUMAN EXPOSURE EXPERIMENT |
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In response to elevated ambient carbon monoxide (CO) due to incomplete combustion of automotive fuels, the Clear Air Act mandates that CO reduction be obtained by adding oxygenates...
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SEPARATION OF ALGAL CELLS FROM WASTEWATER LAGOON EFFLUENTS. VOLUME III: SOIL MANTLE TREATMENT OF WASTEWATER STABILIZATION POND EFFLUENT - SPRINKLER IRRIGATION |
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Lysimeter studies and a two-year field study were conducted to evaluate the efficiency of sprinkler irrigation wastewater treatment as a means of polishing wastewater stabilization...
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SEPARATION OF ISOMERS OF NONYLPHENOL AND SELECT NONPHENYL POLYETHOXYLATES BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY ON A GRAPHITIC CARBON COLUMN |
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p-Nonylphenol (NP) is ubiquitous degradation product of nonylphenol polyethoxylate (NPE) surfactants and has been reported to be an endocrine disrupter. It is composed of numerous ...
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SEPARATION OF OCTYLPHENOL POLYETHER ALCOHOLS SURFACTANTS BY CAPILLARY COLUMN AND HPLC |
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Separation of nonionic octylphenol polyether alcohols (OPA) by supercritical fluid chromatography (SFC) and HPLC is described. sing a density programming and a 50-pm i.d. capillary...
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SEQUENTIAL ANAEROBIC DEGRADATION OF 2,4-DICHLOROPHENOL IN FRESHWATER SEDIMENTS |
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2,4-Dichlorophenol (2,4-DCP) was degraded anaerobically in freshwater lake sediments. rom observed intermediates in incubated sediment samples and from enrichment cultures, the fol...
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SEQUENTIAL NITRIFICATION-DENITRIFICATION IN A PLUG FLOW ACTIVATED SLUDGE SYSTEM |
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The use of the carbon sources present in municipal wastewater to provide the energy required for nitrification-denitrification was evaluated on a pilot plant scale in a simulated p...
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SEQUESTERING CARBON IN SOIL: A WORKSHOP TO EXPLORE THE POTENTIAL FOR MITIGATING GLOBAL CLIMATE CHANGE |
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This workshop was an excellent forum for a scientific debate on the potential of soils to sequester additional carbon from the atmosphere. wo primary conclusions can be drawn from ...
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SEQUESTRATION OF HYDROPHOBIC ORGANIC CONTAMINANTS BY GEOSORBENTS. (R822626) |
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The chemical interactions of hydrophobic organic contaminants (HOCs) with soils and sediments (geosorbents) may result in strong binding and slow subsequent release rates that s...
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SERVO CONTROLLED OPTIMIZATION OF NITRIFICATION-DENITRIFICATION OF WASTEWATER IN SOIL |
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Based on potentials of Platinum electrodes in conjunction with a Calomel reference electrode, a servo controller was used to meter trickling filter secondary wastewater application...
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SHEAR RHEOLOGICAL PROPERTIES OF ACRYLIC COPOLYMERS AND TERPOLYMERS SUITABLE FOR POTENTIALLY MELT PROCESSABLE CARBON FIBER PRECURSORS. (R829555) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SHIFTING THE CARBON BALANCE. (R825157) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SHIFTS BETWEEN PERIPHYTON-AND PHYTOPLANKTON-BASED FOOD WEBS IN GREAT LAKES COASTAL WETLANDS |
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Numerous studies have revealed the importance of algae as an energetic base for wetland food webs. Earlier carbon and nitrogen stable isotope analyses in a Lake Superior coastal we...
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SHORT-TERM TEMPORAL VARIATION IN PM2.5 MASS AND CHEMICAL COMPOSITION DURING THE ATLANTA SUPERSITE EXPERIMENT, 1999 |
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Measurements in urban Atlanta of transient aerosol events in which PM2.5 mass concentrations rapidly rise and fall over a period of 3-6 hr are reported. The data are based on ne...
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SHREDDED RUBBER TIRES AS A BULKING AGENT FOR COMPOSTING SEWAGE SLUDGE |
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Shredded rubber tires were evaluated as a bulking agent for composting waste-water sludges. Three sludges (raw primary, anaerobically digested, and secondary biological), two amend...
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SHREDDED RUBBER TIRES AS A BULKING AGENT IN SEWAGE SLUDGE COMPOSTING |
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The study evaluated shredded rubber tires mixed with raw primary sludge to determine the optimum particle size and mix ratio for efficient composting. Of the three sizes and mix ra...
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SIGNALING MECHANISMS IN HUMAN AIRWAY EPITHELIAL CELLS EXPOSED TO CARBON ULTRAFINE PARTICLES |
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SIGNALING MECHANISMS IN HUMAN AIRWAY EPITHELIAL CELLS EXPOSED TO CARBON ULTRAFINE PARTICLES
Y.M. Kim, A.G. Lenz, R. Silbajoris, I. Jaspers and J.M. Samet. Department of Environm...
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SIMPLE SAMPLE CLEAN UP PROCEDURE AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC METHOD FOR THE ANALYSIS OF CYANURIC ACID IN HUMAN URINE |
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Cyanuric acide (CA) is widely used as a chlorine stabilizer in outdoor pools. No simple method exists for CA measurement in the urine of exposed swimmers. The high hydrophilicity ...
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SIMPLE WAYS TO IMPROVE PH AND ALKALINITY MEASUREMENTS FOR WATER UTILITIES AND LABORATORIES |
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Both pH and total alkalinity determinations are critical in characterizing chemical properties of water, being important to implementing good process control, determining corrosiv...
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SIMPLIFIED SOIL GAS SENSING TECHNIQUES FOR PLUME MAPPING AND REMEDIATION MONITORING |
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Soil gas measurements were taken in a beach sand matrix of the unsaturated zone above a ground water plume contaminated from a spill near 35,000 gallons of aviation gasoline. he so...
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SIMULTANEOUS CONTROL OF HG(0), SO2, AND NOX BY NOVEL OXIDIZED CALCIUM-BASED SORBENTS |
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The paper gives results of an investigation of two classes of calcium (Ca)-based sorbents (hydrated limes and silicate compounds). {NOTE: Efforts to develop multipollutant control ...
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SIMULTANEOUS CONTROL OF HG(0), SO2, AND NOX BY NOVEL OXIDIZED CALCIUM-BASED SORBENTS: JOURNAL ARTICLE |
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NRMRL-RTP-P-593a Ghorishi, S.B., Singer, C., Jozewicz, W., Sedman*, C.B., and Srivastava*, R.K. Simultaneous Control of Hg(0), SO2, and NOx by Novel Oxidized Calcium-Based Sorbent...
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SIMULTANEOUS CONTROL OF HGO, SO2, AND NOX BY NOVEL OXIDIZED CALCIUM-BASED SORBENTS |
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The paper gives results of an investigation of two classes of calcium (Ca)-based sorbents (hydrated limes and silicate compounds). (NOTE: Efforts to develop multipollutant control...
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SIMULTANEOUS DESTRUCTION OF ORGANICS AND STABILIZATION OF METALS IN SOILS |
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The Sulchem Process reacts the material being treated with elemental sulfur at elevated temperatures in an inert reactor system. Organic hydrocarbons react with the sulfur to form ...
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SIMULTANEOUS INHIBITION OF CARBON AND NITROGEN MINERALIZATION IN A FOREST SOIL BY SIMULATED ACID PRECIPITATION |
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Acid Precipitation may alter the rates of microbial processes in soil that are important for forest productivity. Acidification of soil can result in a depression of carbon mineral...
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SINGLE-BREATH DIFFUSING CAPACITY AND LUNG VOLUMES IN SMALL LABORATORY MAMMALS |
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The authors measured the single-breath diffusing capacity for carbon monoxide (DLco), total lung capacity(TLC), functional residue capacity(FRC), and residual volume(RV) in anesthe...
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SITE (SUPERFUND INNOVATIVE TECHNOLOGY EVALUATION) DEMONSTRATION OF THE SHIRCO INFRARED INCINERATOR |
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A Shirco Infrared System used for a removal action at a PCB-containing oil refining waste site in Brandon, Florida (a suburb of Tampa) was evaluated. The evaluation included a dete...
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SITE - EMERGING TECHNOLOGIES: LASER INDUCED PHOTO- CHEMICAL OXIDATIVE DESTRUCTION OF TOXIC ORGANICS IN LEACHATES AND GROUNDWATERS |
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The technology described in this report has been developed under the Emerging Technology Program of the Superfund Innovative Technology Evaluation (SITE) Program to photochemically...
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SITE - EMERGING TECHNOLOGIES: LASER INDUCED PHOTOCHEMICAL OXIDATIVE DESTRUCTION OF TOXIC ORGANICS IN LEACHATES AND GROUNDWATERS |
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The technology described in this report has been developed under the Emerging Technology Program of the Superfund Innovative Technology Evaluation (SITE) Program to photochemically...
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SITE EMERGING TECHNOLOGIES: BIOSCRUBBER FOR REMOVING HAZARDOUS ORGANIC EMISSIONS FROM SOIL, WATER, AND AIR DECONTAMINATION PROCESSES |
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An engineered biofilter was developed to digest hazardous organic emissions from soil, water, and air decontamination processes. ench scale unit was tested for >11 months for the r...
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SITE EMERGING TECHNOLOGY SUMMARY. BIOSCRUBBER FOR REMOVING HAZARDOUS ORGANIC EMISSIONS FROM SOIL, WATER, AND AIR DECONTAMINATION PROCESSES |
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An advanced biofiltration system has been developed for the removal of trace organic contaminants in air. This bioscrubber uses activated carbon as a support for biogrowth. An adva...
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SITE EMERGING TECHNOLOGY SUMMARY: INTEGRATION OF PHOTOCATALYTIC OXIDATION WITH AIR STRIPPING OF CONTAMINATED AQUIFERS |
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In a recently completed test program, bench-scale laboratory studies at Arizona State University (ASU) in Tempe, AZ, and pilot-scale studies in a simulated field test situation at ...
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SITE TECHNOLOGY CAPSULE: SONOTECH PULSE COMBUSTION SYSTEM |
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Sonotech has targeted waste incineration as a potential application for this technology. Based on bench-scale rotary-kiln simulator tests, Sonotech proposed a demonstration under t...
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SITE TECHNOLOGY CAPSULE: UNTERDRUCK-VERDAMPFER- BRUNNEN TECHNOLOGY (UVB) VACUUM VAPORIZING WELL |
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The UVB technology is an in situ groundwater remediation technology for aquifers contaminated with compounds amenable to air stripping, and is an alternative method to pump-and-tre...
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SIZE DISTRIBUTION AND DIURNAL CHARACTERISTICS OF PARTICLE-BOUND METALS IN SOURCE AND RECEPTOR SITES OF THE LOS ANGELES BASIN. (R827352C006) |
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Measurement of daily size-fractionated ambient PM10 mass, metals, inorganic ions (nitrate and sulfate) and elemental and organic carbon were conducted at source (Down...
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SIZE DISTRIBUTIONS OF ELEMENTAL CARBON IN ATMOSPHERIC AEROSOLS |
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Environmental problems caused by atmospheric aerosols are well documented in the specialized literature. Studies reporting on the role of dense clouds of soil particles in past mas...
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SIZE FRACTIONATION OF METALS IN RUNOFF FROM RESIDENTIAL AND HIGHWAY STORM SEWERS |
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Stormwater sampling for particulate, colloidal and dissolved metals and organic carbon was conducted for several storms at six outfalls draining locally-designated, nonindustrial l...
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SLOWING THE INCREASE OF ATMOSPHERIC CARBON DIOXIDE: A BIOLOGICAL APPROACH |
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Planting trees to act as carbon sinks has been suggested as a way to slow the increase of atmospheric CO2. orestry growth and yield models were used to estimate that it would take ...
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SLURRY-BASED BIOTREATMENT OF POLYARYL CONTAMINANTS SORBED ONTO SOIL |
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Whole soil samples were obtained from a site immediately adjacent to an impoundment used for disposal of still bottom residue from a benzene, toluene and xylenes (BTX) production p...
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SMALL SYSTEMS MEET SUPERFUND CHALLENGE WITH POINT-OF-ENTRY TREATMENT UNITS |
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Several small systems and individual homeowners have been faced with the task of treating their groundwater that has been contaminated with various organic contaminants. ontaminati...
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SMALL-CHAMBER DETERMINATIONS OF THE EMISSION RATES OF MERCURY FROM LATEX PAINTS |
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The paper gives results of testing five latex paints, containing organic mercury additives, in small environmental test chambers to determine the emission rates of mercury. wo of t...
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SMOG CHAMBER STUDIES OF SECONDARY ORGANIC AEROSOLS FROM IRRADIATED HYDROCARBONS UNDER AMBIENT CONDITIONS |
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Understanding the physics and chemistry of aerosols is fundamental to evaluating health risks and developing and evaluating atmospheric models. However, as noted in a recent NRC ...
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SOA FORMATION FROM THE IRRADIATION OF A-PINENE-NOX IN THE ABSENCE AND PRESENCE OF SULFUR DIOXIDE |
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Sulfur dioxide (SO2) is an important constituent in the polluted atmosphere. It is emitted from combustion sources using fuels that contain sulfur. Emissions of SO2 in the Unit...
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SOA YIELDS AND ORGANIC PRODUCT DISTRIBUTION FROM NATURAL HYDROCARBON/NOX IRRADIATIONS |
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Secondary organic aerosol (SOA) typically comprises one-quarter to one-third of the ambient aerosol mass in summertime urban atmospheres. In tropospheric environments, the main ...
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SOIL AIR CARBON DIOXIDE CONCENTRATIONS IN A NEW ENGLAND SPRUCE-FIR FORESTS |
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Research and modeling efforts to evaluate soil-soil solution chemical interactions must take into account solution equilibria with soil air CO2. Measurements of soil air CO2 and so...
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SOIL CO2 EFFLUX FROM ISOTOPICALLY LABELED BEECH AND SPRUCE IN SOUTHERN GERMANY |
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• Carbon acquisition and transport to roots in forest trees is difficult to quantify and is affected by a number of factors, including micrometeorology and anthropogenic stresses. ...
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SOIL FERTILITY LIMITS CARBON SEQUESTRATION BY FOREST ECOSYSTEMS IN A CO2-ENRICHED ATMOSPHERE. (R828785) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SOIL N AND C GEOGRAPHY OF THE SALMON RIVER WATERSHED AND THE OREGON COAST |
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To help establish restorative criteria of salmon runs in the Pacific Northwest, resource inventories on affected watersheds are a critical component of this process. Diverse soil ...
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SOIL ORGANIC CARBON, NITROGEN, AND PHOSPHORUS AS INDICATORS OF RECOVERY IN RESTORED SPARTINA MARSHES. (R826111) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SOIL ORGANIC MATTER STABILIZATION IN A TRANSECT OF FOREST TYPES ON SOILS WITH DIVERSE MINERALOGY AND ENVIRONMENTAL CONDITIONS IN THE PACIFIC NORTHWEST USA |
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abstract for presentation...
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SOIL QUALITY RECOVERY IN PREVIOUSLY FARMED FIELDS SEEDED TO PERENNIAL WARM SEASON NATIVE GRASS |
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A study of twelve Conservation Reserve Program sites in northeastern Kansas was conducted to determine native grass species and selected soil textures influence on soil quality rec...
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SOIL SORPTION OF VOLATILE AND SEMIVOLATILE ORGANIC COMPOUNDS IN A MIXTURE |
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Studies were conducted to evaluate lipophilicity as a predictor of sorption for a mixture of organic compounds with high vapor pressures commonly present at hazardous waste sites. ...
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SOLAR ULTRAVIOLET RADIATION AND AQUATIC CARBON, NITROGEN, SULFUR AND METALS CYCLES |
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Solar ultraviolet radiation (290-400 nm) has a wide-ranging impact on biological and chemical processes that affect the cycling of elements in aquatic environments. This chapter us...
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SOLAR UV RADIATION AND AQUATIC BIOGEOCHEMISTRY |
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During the past decade significant interest has developed in the influence of solar UV radiation on biogeochemical cycles in surface waters of lakes and the sea. A major portion o...
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SOLID-PHASE EXTRACTION OF 35 DBPS WITH ANALYSIS BY GC/ECD AND GC/MS |
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An analytical method for 35 disinfection by-products (DBPs) was developed for a U.S. Environmental Protection Agency (EPA) health effects study. A toxicological evaluation was con...
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SOLID-PHASE EXTRACTION OF 35 DBPS WITH ANALYSIS BY GC/ECD AND GC/MS |
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An analytical method for 35 disinfection by-products (DBPs) was developed for a U.S. Environmental Protection Agency (EPA) health effects study. A toxicological evaluation was cond...
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SOLID-PHASE EXTRACTION OF 35 DBPS WITH ANALYSIS BY GC/ECD AND GC/MS 2007 |
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An analytical method for 35 disinfection by-products (DBPs) was developed for a U.S. Environmental Protection Agency (EPA) health effects study. A toxicological evaluation was cond...
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SOLUBILITIES OF ACID GASES AND NITROGEN IN METHANOL |
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The report describes a thermodynamic model, developed to predict the equilibrium behavior of carbon dioxide, hydrogen sulfide, nitrogen, and methanol mixtures. The model uses the f...
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SOLUBILITIES OF CARBON DIOXIDE IN METHANOL AND METHANOL-WATER AT HIGH PRESSURES: EXPERIMENTAL DATA AND MODELING |
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The solubilities of carbon dioxide in methanol and in methanol-water mixtures have been measured at 243, 258, 273, and 298 K, and at pressures up to 54 atm. An extended Soave-Redli...
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SOLUBILITY OF ORGANIC BIOCIDES IN SUPERCRITICAL CO2 AND CO2+ COSOLVENT MIXTURES |
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Solubilities of four organic biocides in supercritical carbon dioxide (Sc-CO2) were measured using a dynamic flowr apparatus over a pressure range of 10 to 30 MPa and temperature o...
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SOLUBLE ORGANIC NITROGEN CHARACTERISTICS AND REMOVAL |
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This report discusses sources, concentrations, characteristics and methods for removal of Soluble Organic Nitrogen (SON) in wastewater. Removal by various physical, chemical and bi...
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SOLVENT EMISSION REDUCTION STUDY AT NEWARK AFB, OHIO |
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The report gives results of tests of Freon 113 emissions performed at Newark AFB. Based on the results, recommendations were made to reduce the emissions from the facility by 250,0...
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SOLVENT RECOVERY AT VANDENBERG AIR FORCE BASE |
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The report gives results of a feasibility study of the addition of vapor recovery and solvent purification equipment for Vandenberg Air Force Base (VAFB) to reuse the large quantit...
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SOLVENT WASHING OF PCP CONTAMINATED SOILS WITH ANAEROBIC TREATMENT OF WASH FLUIDS |
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A solvent washing procedure for the removal of pentachlorophenol (PCP) from contaminated soils is presented. his procedure can be used in both in-situ and above ground soil washing...
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SOME EFFECTS OF CADMIUM ON CONIFEROUS FOREST SOIL AND LITTER MICROCOSMS |
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Description and criticism is given of a preliminary design and use of a soil/litter microcosm in which oxygen, temperature, and humidity are kept constant, and oxygen generation an...
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SORBENTS FOR FLUORIDE, METAL FINISHING, AND PETROLEUM SLUDGE LEACHATE CONTAMINANT CONTROL |
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This report covers the initial laboratory studies carried out to identify the most promising sorbents that may be used to significantly reduce the concentration of measurable conta...
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SORPTION AND DESORPTION OF CADMIUM BY DIFFERENT FRACTIONS OF BIOSOLIDS - AMENDED SOILS |
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Series of Cd sorption and desorption experiments were conducted on different fractions of soils amended with biosolids, Cd-salt, and unamended soils (control) to test the hypothesi...
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SORPTION NONEQUILIBRIUM DURING SOLUTE TRANSPORT (JOURNAL VERSION) |
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The effects of pore-water velocity, solute hydrophobicity, and sorbent organic-carbon content on sorption nonequilibrium during solute transport were evaluated. Nonequilibrium tran...
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SORPTION OF 2, 3, 7, 8-TETRACHLORODIBENZO-P-DIOXIN TO SOILS FROM WATER/METHANOL MIXTURES |
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Sorption of 14 C-labeled 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCCD) to Soils from water/methanol mixtures has been evaluated by batch shake testing. ncontaminated soils from Times ...
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SORPTION OF 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN FROM WATER BY SURFACE SOILS |
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The sorption of 14C-labelcd 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) from water by two uncontaminated surface soils from the Times Beach, MO, area was evaluated by using batch sh...
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SORPTION OF 2,4'-DICHLOROBIPHENYL AND FLUORANTHENE TO A MARINE SEDIMENT AMENDED WITH DIFFERENT TYPES OF BLACK CARBON |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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SORPTION OF CADMIUM ONTO DIFFERENT FRACTIONS OF BIOSOLIDS AND CADMIUM SALT AMENDED SOILS |
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Biosolids and Cd salt-amended soils were collected from a long-term field experiment established in 1976. Cadmium sorption experiments were conducted on different fractions of soil...
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SORPTION OF CARBON TETRACHLORIDE, ETHYLENE DIBROMIDE AND TRICHLOROETHYLENE ON SOIL AND CLAY |
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The sorption of carbon tetrachloride, ethylene dibromide, and trichloroethylene in two silty clay loam soils and aluminium Al(+3) or calcium Ca(+2) saturated montmorillonite clay w...
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SORPTION OF HYDROPHOBIC POLLUTANTS ON NATURAL SEDIMENTS |
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The sorption of hydrophobic compounds (aromatic hydrocarbons and chlorinated hydrocarbons) spanning a concentration range in water solubility from 500 parts per trillion (ppt) to 1...
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SORPTION OF NONIONIC SURFACTANT OLIGOMERS TO SEDIMENT AND PCE DNAPL: EFFECTS ON PCE DISTRIBUTION BETWEEN WATER AND SEDIMENT. (R826650) |
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Introduction of surfactant mixtures to the subsurface for the purpose of
surfactant-enhanced aquifer remediation requires consideration of the effects of
surfactant sorp...
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SORPTION OF ORGANIC ACID COMPOUNDS TO SEDIMENTS: INITIAL MODEL DEVELOPMENT |
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The adsorption to sediments and soils of selected organic acid compounds was examined as a function of compound and sediment properties. ntrinsic compound properties examined inclu...
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SORPTION OF ORGANIC CONTAMINANTS TO A LOW CARBON SUBSURFACE CORE |
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Sorption of 1,2,4-trichlorobenzene, o-chlorotoluene and dimethylphthalate to a series of subsurface samples collected with depth is reported. Desorption of sorbate from the sorbent...
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SORPTION OF VOLATILE ORGANIC SOLVENTS FROM AQUEOUS SOLUTION ONTO SUBSURFACE SOLIDS |
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Sorption isotherms for tetrachloroethene on low-carbon subsurface core samples were linear to equilibrium solution concentrations of 2 mg L-1. Concentrations above this value produ...
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SORPTION PROPERTIES OF SEDIMENTS AND ENERGY-RELATED POLLUTANTS |
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This report describes the factors that determine the extent of sorption of organic compounds that are representative of coal conversion waste streams. The compounds, all radiolabel...
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SORPTION, DEGRADATION, AND MINERALIZATION OF CARBARYL IN SOILS, FOR SINGLE-PESTICIDE AND MULTIPLE-PESTICIDE SYSTEMS |
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Sorption, degradation, and mineralization of carbaryl (1-naphthyl N-methylcarbamate) alone and in mixtures with atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) and...
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SORPTION, DIFFUSION AND PERMEATION OF 1,1,1-TRICHLOROETHANE THROUGH ADSORBENT-FILLED POLYMERIC MEMBRANES |
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Addition of hydrophobic adsorbents such as activated carbon into polymeric membranes increased the sorption capacity for 1,1,1-trichloroethane and the trichloroethane permeability ...
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SOURCE APPORTIONMENT OF INDOOR, OUTDOOR, AND PERSONAL PM2.5 IN SEATTLE, WASHINGTON, USING POSITIVE MATRIX FACTORIZATION |
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As part of a large exposure assessment and health effects panel study, 33 trace elements and light-absorbing carbon were measured on 24-hr particulate matter with an aero-dynamic d...
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SOURCE APPORTIONMENT OF PM 2.5 AND CARBON IN SEATTLE USING CHEMICAL MASS BALANCE AND POSITIVE MATRIX FACTORIZATION |
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Three years of PM2.5 speciated data were collected and chemically analyzed using the IMPROVE protocol at the Beacon Hill site in Seattle. The data were analyzed by the Chemical ...
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SOURCE APPORTIONMENT OF PM2.5 AT AN URBAN IMPROVE SITE IN SEATTLE, WA |
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The multivariate receptor models Positive Matrix Factorization (PMF) and Unmix were used along with EPA's Chemical Mass Balance model to deduce the sources of PM2.5 at a centrall...
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SOURCE APPORTIONMENT OF PM2.5 IN SEATTLE, WA URBAN IMPROVE SITE: COMPARISON OF THREE RECEPTOR MODELS AND SOURCE PROFILES |
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IMPROVE protocol data were collected at the urban Beacon Hill monitoring site in Seattle, WA from 1996-99. The 289 sets of PM2.5 filters were analyzed for: metals using PIXIE and...
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SOURCE APPORTIONMENT OF PRIMARY AND SECONDARY CARBONACEOUS AEROSOL IN THE UNITED STATES USING MODELS AND MEASUREMENTS |
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In this presentation, three diagnostic evaluation methods of model performance for carbonaceous aerosol are reviewed. The EC-tracer method is used to distinguish primary and secon...
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SOURCE APPORTIONMENT OF PRIMARY CARBONACEOUS AEROSOL USING THE COMMUNITY MULTISCALE AIR QUALITY MODEL |
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A substantial fraction of fine particulate matter (PM) across the United States is composed of carbon, which may be either emitted in particulate form (i.e., primary) or formed in ...
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SOURCE APPORTIONMENT OF SEATTLE PM 2.5 USING STN ORGANIC CARBON PEAKS |
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Results from the Source Apportionment of Seattle PM2.5 Using STN Organic Carbon Peaks study will be presented at the American Association for Aerosol Research (AAAR) 24t...
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SOURCE APPORTIONMENT OF SEATTLE PM 2.5: A COMPARISON OF IMPROVE AND ENHANCED STN DATA SETS |
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Seattle, WA, STN and IMPROVE data sets with STN temperature resolved carbon peaks were analyzed with both the PMF and Unmix receptor models. In addition, the IMPROVE trace element...
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SOURCE APPORTIONMENT STUDIES OF PM-2.5 IN TWO CZECH CITIES: A COMPARISON OF DIFFERENT METHODS |
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Air monitoring data were obtained as part of an ongoing air pollution-health outcome study initiated in 1991. Teplice, located in northwestern Bohemia, was selected because the lo...
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SOURCE APPORTIONMENT STUDIES OF PM-2.5 IN TWO CZECH CITIES: POSSIBLE USES IN HEALTH STUDIES |
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Aerosol and gas phase air pollutant measurements were made in two cities during an ongoing air pollution-health outcome study in the Czech Republic. Teplice, located in northweste...
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SOURCE ASSESSMENT: ACRYLIC ACID MANUFACTURE; STATE-OF-THE-ART |
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This report summarizes data on air emissions from the production of acrylic acid. Hydrocarbons, carbon monoxide, and nitrogen oxide are emitted from various operations. Hydrocarbon...
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SOURCE ASSESSMENT: ASPHALT HOT MIX |
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This report summarizes data on air emissions from the asphalt hot mix industry. A representative asphalt hot mix plant was defined, based on the results of an industrial survey, to...
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SOURCE ASSESSMENT: CARBON BLACK MANUFACTURE |
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The report summarizes the assessment of air emissions from the manufacture of carbon black, currently manufactured in the U.S. by two major processes: thermal and oil furnace. Sour...
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SOURCE ASSESSMENT: CHARCOAL MANUFACTURING, STATE-OF-THE-ART |
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This document reviews the state of the art of air emissions from charcoal manufacture. The composition, quality, and rate of emissions, and their environmental effects are describe...
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SOURCE ASSESSMENT: COAL REFUSE PILES, ABANDONED MINES AND OUTCROPS, STATE-OF-THE-ART |
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This report describes a study of atmospheric emissions from coal refuse piles, abandoned mines, and outcrops. The potential environmental effect of the source was evaluated using s...
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SOURCE ASSESSMENT: COAL-FIRED RESIDENTIAL COMBUSTION EQUIPMENT FIELD TESTS, JUNE 1977 |
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The report gives results of a study to quantify criteria pollutants and characterize atmospheric emissions from coal-fired residential heating equipment. Flue gas was sampled from ...
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SOURCE ASSESSMENT: CRUSHED LIMESTONE, STATE OF THE ART |
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This report describes a study of atmospheric emissions from the crushed limestone industry. Crushed limestone plants emit particulates from drilling, blasting, transport on unpaved...
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SOURCE ASSESSMENT: CRUSHED SANDSTONE, QUARTZ, AND QUARTZITE, STATE-OF-THE-ART |
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This report describes a study of atmospheric emissions from the crushed sandstone, quartz, and quartzite industry. Particulates are emitted from drilling, blasting, loading and unl...
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SOURCE ASSESSMENT: OVERVIEW AND PRIORITIZATION OF EMISSIONS FROM TEXTILE MANUFACTURING |
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The report gives an overview of air pollution emission levels and a ranking of the public health hazard potential of textile manufacturing operations. The textile industry was defi...
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SOURCE ASSESSMENT: PESTICIDE MANUFACTURING AIR EMISSIONS--OVERVIEW AND PRIORITIZATION |
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The report is an overview of the pesticide manufacturing industry and prioritizes 80 major pesticides based on their potential environmental burden from an air pollution standpoint...
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SOURCE ASSESSMENT: RUBBER PROCESSING, STATE OF THE ART |
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This report summarizes data on air emissions from the production of vulcanized elastomers (rubbers) and fabrication of rubber products. Hydrocarbons and particulates are emitted fr...
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SOURCE ASSESSMENT: TEXTILE PLANT WASTEWATER TOXICS STUDY, PHASE II |
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The report gives results of a study concerned with BATEA for the textile manufacturing industry. The level of removal of specific toxic pollutants and toxicity (measured by results...
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SOURCE IDENTIFICATION OF PM2.5 IN AN ARID NORTHWEST U.S. CITY BY POSITIVE MATRIX FACTORIZATION. (R827355C008) |
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Spokane, WA is prone to frequent particulate pollution episodes due to dust storms, biomass burning, and periods of stagnant meteorological conditions. Spokane is the location o...
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SOURCE PARTITIONING USING STABLE ISOTOPES: COPING WITH TOO MANY SOURCES |
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Stable isotopes are increasingly being used as tracers in environmental studies. One application is to use isotopic ratios to quantitatively determine the proportional contributio...
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SOURCE-SINK BALANCE AND CARBON ALLOCATION BELOW GROUND IN PLANTS EXPOSED TO OZONE |
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The role of tropospheric ozone in altering plant growth and development has been the subject of thousands of publications over the last several decades. Still, there is limited un...
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SOURCE-SINK BALANCE AND CARBON ALLOCATION BELOW GROUND IN PLANTS EXPOSED TO OZONE |
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The role of tropospheric ozone in altering plant growth and development has been the subject of thousands of publications and dozens of reviews over the last several decades. Ther...
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SOURCES OF COPPER AIR EMISSIONS |
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The report gives results of a study to update estimates of atmospheric emissions of copper and copper compounds in the U.S. Source categories evaluated included: metallic minerals,...
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SOUTH FLORIDA MERCURY MONITORING AND MODELING PILOT STUDY |
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In 1995, the South Florida Atmospheric Mercury Monitoring Study was established to investigate several likely sources of Hg, as well as transport and deposition mechanisms. Fiel...
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SPATIAL AND TEMPORAL TRENDS IN GROUNDWATER CHEMISTRY AND PRECIPITATE FORMATION AT THE ELIZABETH CITY PERMEABLE REACTIVE BARRIER |
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Accumulation of mineral precipitates and microbial biomass are key factors that impact the long-term performance of PRBs. Both processes can impact remedial performance by affecti...
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SPATIAL AND TEMPORAL VARIABILITY IN AUTOTROPHIC PRODUCTION AND HETEROTROPHIC CARBON UTILIZATION IN A LARGE GULF-COAST ESTUARY, MOBILE BAY, USA. (R827072C010) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SPATIAL AND TEMPORAL VARIABILITY IN THE AMOUNT AND SOURCE OF DISSOLVED ORGANIC CARBON: IMPLICATIONS FOR UV EXPOSURE IN AMPHIBIAN HABITATS |
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The amount, chemical composition, and source of dissolved organic carbon (DOC), together with in situ ultraviolet-B radiation (UV -B; 280 to 320 nm) attenuation, were measured at o...
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SPATIAL AND TEMPORAL VARIABILITY IN THE AMOUNT AND SOURCE OF DISSOLVED ORGANIC CARBON: IMPLICATIONS FOR UV EXPOSURE IN AMPHIBIAN HABITS |
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Ultraviolet radiation (UVR) has been suggested as a potential cause of population declines and increases in malformations in amphibians. This study indicates that the present distr...
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SPATIAL AND TEMPORAL VARIATION IN CARBON AND OXYGEN ISOTOPES IN TREE RINGS: A COMPARISON OF RIPARIAN AND NON-RIPARIAN TREES |
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abstract...
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SPATIAL AND TEMPORAL VARIATION OF CARBON IN THE PENSACOLA BAY SYSTEM |
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Carbon cycling is an important process in estuarine ecosystems, but is highly variable among systems. Precipitation is one of the driving factors of this cycle. Seasonal carbon con...
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SPATIAL AND TEMPORAL VARIATION OF CARBON IN THE PENSACOLA BAY SYSTEM (ABSTRACT) |
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Carbon cycling is an important process in estuarine ecosystems, but is highly variable among systems. Precipitation is one of the driving factors of this cycle. Seasonal carbon con...
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SPATIAL AND TEMPORAL VARIATION OF CARBON IN THE PENSACOLA BAY SYSTEM (POSTER SESSION) |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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SPATIAL DISTRIBUTION OF CARBON AND SULFUR PRECIPITATING WITHIN PERMEABLE REACTIVE BARRIERS: DEVELOPMENT OF ANALYTICAL METHODS |
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A permeable reactive barrier (PRB) is a wall of porous reactive material placed in the path of a dissolved contaminant plume for the purpose of removing contaminants from ground wa...
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SPATIAL FOREST SOIL PROPERTIES FOR ECOLOGICAL MODELING IN THE WESTERN OREGON CASCADES |
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The ultimate objective of this work is to provide a spatially distributed database of soil properties to serve as inputs to model ecological processes in western forests at the lan...
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SPATIAL HETEROGENEITY, CONTRACT DESIGN, AND THE EFFICIENCY OF CARBON SEQUESTRATION POLICIES FOR AGRICULTURE. (R828745) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SPATIAL PATTERNS OF ABOVEGROUND PRODUCTION AND MORTALITY OF WOODY BIOMASS FOR EASTERN U.S. FORESTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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SPATIAL PATTERNS OF SOIL ORGANIC CARBON IN THE CONTIGUOUS UNITED STATES |
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Spatial patterns and total amounts of soil organic C (SOC) are important data for studies of soil productivity, soil hydraulic properties, and the cycling of C-based greenhouse gas...
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SPATIAL VARIABILITY OF OZONE AND OTHER POLLUTANTS AT ST. LOUIS, MISSOURI |
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A network of 25 aerometric stations was part of the U.S. Environmental Protection Agency's Regional Air Pollution Study (RAPS) in the greater St. Louis area. At these stations ozon...
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SPECTROSCOPIC CHARACTERIZATION OF SOME CHLORINATED TRICYCLIC HYDROCARBONS OF THE C10 SERIES: CHLORDANES, CHLORDENES AND NONACHLORS |
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Carbon-13 and proton nuclear magnetic resonance (n.m.r.) spectra of ten chlorinated hydrocarbons, which are components of technical chlordane and one chlordane metabolite, were exa...
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STABILITY EVALUATION OF SULFUR DIOXIDE, NITRIC OXIDE AND CARBON MONOXIDE GASES IN CYLINDERS |
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The US EPA recommends in their EPA Traceability Protocol 1 and 2 that reactive gases be reanalyzed every six months. The purpose of this study was to assess the stability of select...
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STABILITY OF PARTS-PER-BILLION HAZARDOUS ORGANIC CYLINDER GASES AND PERFORMANCE AUDIT RESULTS OF SOURCE TEST AND AMBIENT AIR MEASUREMENT SYSTEMS. STATUS REPORT 1 |
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A repository of 14 gaseous organic compounds at parts-per-billion (ppb) levels in compressed gas cylinders has been established by the U.S. Environmental Protection Agency (EPA). T...
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STABILITY OF PARTS-PER-BILLION HAZARDOUS ORGANIC CYLINDER GASES AND PERFORMANCE AUDIT RESULTS OF SOURCE TEST AND AMBIENT AIR MEASUREMENT SYSTEMS. STATUS REPORT 2 |
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A repository of 22 gaseous organic compounds at parts-per-billion (ppb) levels in compressed gas cylinders has been established by the U.S. Environmental Protection Agency (EPA). T...
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STABILITY OF PPB HAZARDOUS ORGANIC CYLINDER GASES AND PERFORMANCE AUDIT RESULTS OF SOURCE TEST AND AMBIENT AIR MEASUREMENT SYSTEMS--STATUS REPORT #5 |
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An evaluation of 29 gaseous organic compounds at PPB levels incompressed gas cylinders was conducted by the U.S. Environmental Protection Agency (EPA). Primary objectives of this o...
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STABLE CARBON AND OXYGEN ISOTOPE RATIOS IN OTOLITHS DIFFERENTIATE WINTER FLOUNDER NURSERY AREAS |
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Poster Presentation a scientific meeting...
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STABLE CARBON ISOTOPE ANALYSIS OF NUCLEIC ACIDS TO TRACE SOURCES OF DISSOLVED SUBSTRATES USED BY ESTUARINE BACTERIA |
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The natural abundance of stable carbon isotopes measured in bacterial nucleic acids that were extracted from estuarine bacterial concentrates were used to trace sources of organic ...
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STABLE CARBON ISOTOPE BIOGEOCHEMISTRY OF A SHALLOW SAND AQUIFER CONTAMINATED WITH FUEL HYDROCARBONS |
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Ground-water chemistry and the stable C isotope composition ( 13CDIC) of dissolved C (DIC) were measured in a sand aquifer contaminated with JP-4 fuel hydrocarbons. Results show t...
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STABLE CARBON ISOTOPE EVIDENCE FOR COUPLING BETWEEN SEDIMENTARY BACTERIA AND SEAGRASSES IN A SUB-TROPICAL LAGOON |
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We measured stable carbon isotope ratios (d13C) in phospholipid fatty acids (PLFAs) to identify the primary carbon source utilized by sedimentary bacteria in Lower Laguna Madre, Te...
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STABLE CARBON ISOTOPE RATIO AND COMPOSITION OF MICROBIAL FATTY ACIDS IN TROPICAL SOILS |
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The soil microbial community plays a critical part in tropical ecosystem functioning through its role in the soil organic matter (SOM) cycle. This study evaluates the relative eff...
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STABLE CARBON ISOTOPIC COMPOSITION OF GASOLINES DETERMINED BY ISOTOPE RATIO MONITORING GAS CHROMATOGRAPHY MASS SPECTROMETRY. (R826178) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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STABLE CHLORINE AND CARBON ISOTOPIC COMPOSITIONS OF SELECTED SEMI-VOLATILE ORGANOCHLORINE COMPOUNDS. (R828161) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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STABLE ISOPTOPE RATIOS IN ARCHIVED STRIPED BASS SCALES SUGGEST CHANGES IN TROPHIC STRUCTURE |
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Stable carbon isotope ratios were measured in archived striped bass, Morone saxatilis (Walbaum), scales to identify changes in the feeding behaviour of this species over time. Stri...
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STABLE ISOTOPE ANALYSIS OF CARBON CYCLING IN THE PERDIDO ESTUARY, FLORIDA. ESTUARIES. |
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22(4):917-926....
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STABLE ISOTOPE ANALYSIS OF MTBE TO EVALUATE THE SOURCE OF TBA IN GROUND WATER |
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Although tert-butyl alcohol (TBA) has not been used as a fuel oxygenate in Orange County, California, the concentrations of TBA in ground water at gasoline spill sites are high com...
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STABLE ISOTOPE EVIDENCE FOR ALTERNATIVE BACTERIAL CARBON SOURCES IN THE GULF OF MEXICO |
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In temperate coastal waters, it is generally assumed that carbon cycling is primarily supported by phytoplankton production, having d13C values ranging from -22 to 18l. In a transe...
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STABLE ISOTOPE RATIOS AND CONTAMINANT CONCENTRATIONS IN A SEWAGE - DISTORTED FOOD WEB |
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Concentrations of selected neutral organic contaminants and stable isotope ratios of carbon, nitrogen and deuterium/hydrogen in invertebrates and fish were compared from near a lar...
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STABLE ISOTOPE RATIOS IN ARCHIVED STRIPED BASS SCALES |
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In recent years fishermen and scientists have noted that striped bass caught along the East Coast of the United States have reduced weight to length ratios with many of the fish ca...
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STABLE ISOTOPE VARIATIONS IN SUSPENDED PARTICLES IN A TEMPERATE NORTH PACIFIC ESTUARY, OREGON, USA |
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Spatial distributions of 13C and 15N in suspended particles were examined monthly over an annual cycle in the euphotic zone (0.5m) of the Yaquina River and Estuary, Oregon. Suspe...
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STABLE ISOTOPIC EVIDENCE OF CARBON AND NITROGEN USE IN CULTURED ECTOMYCORRHIZAL AND SAPROTROPHIC FUNGI |
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Stable isotopes in sporocarps have proven useful for inferring ectomycorrhizal or saprotrophic status and understanding carbon (C) and nitrogen (N) utilization. However, greater u...
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STABLE ISOTOPIC INDICATORS FOR THE BIOGEOCHEMICAL CYCLING OF ORGANIC MATTER IN A TEMPERATE NORTH PACIFIC ESTUARY, OREGON, USA |
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The distributions of 13C and 15N in suspended particles were examined monthly over a two year period at ten stations along a 60 km transect in the euphotic zone (0.5m) of the Yaq...
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STACK TESTING OF THE MOBILE PLASMA ARC UNIT |
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A trial burn program involving a plasma pyrolysis system was conducted at the Royal Military College, Kingston, Ontario. The plasma pyrolysis unit was developed by Pyrolysis System...
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STATE-OF-THE ART OF AQUIFER RESTORATION. VOLUME 1. SECTIONS 1 THROUGH 8 |
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This two-volume report presents a summary of the state-of-the-art of aquifer restoration. Included are eight sections and seven appendices. The text includes sections on: (1) groun...
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STATE-OF-THE-ART OF AQUIFER RESTORATION. VOLUME 2. APPENDICES A THROUGH G |
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This two-volume report presents a summary of the state-of-the-art of aquifer restoration. Included are eight sections and seven appendices. The text includes sections on: (1) groun...
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STATISTICAL ANALYSES OF COADS WIND DATA IN COASTAL REGIONS OF THE UNITED STATES |
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Climate is the result of effects from air temperature and many other variables but air temperature records, compared to records of other measurements, are available over relatively...
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STATISTICAL COMPARISON OF THE EFFECT OF RELATIVE AND ABSOLUTE HUMIDITY ON FIXED-BED CARBON ADSORPTION CAPACITY |
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The paper describes statistical methods used to evaluate data for toluene (at several typical operating temperatures and humidity levels) and to determine which measure of humidity...
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STATUS OF RESEARCH ON AIR QUALITY: MERCURY, TRACE ELEMENTS, AND PARTICULATE MATTER. (R827649) |
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The Air Quality Conference reviewed the state of science and policy on the pollutants mercury, trace elements, and particulate matter (PM) in the environment. Critical issues de...
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STATUS, TRENDS AND IMPLICATIONS OF CARBON FIBER MATERIAL USE |
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This study estimates the future usage of carbon fiber composite materials in both consumer and industrial products, and the resultant economic impact of the disposal of these produ...
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STEAM INJECTION INTO FRACTURED LIMESTONE AT LORING AIR FORCE BASE |
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A research project on steam injection for the remediation of spent chlorinated solvents from fractured limestone was recently undertaken at the former Loring AFB in Limestone, ME. ...
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STEAM STRIPPING OF FIXED-BED GASIFICATION WASTEWATERS |
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The report gives results of laboratory- and bench-scale steam stripping tests, using wastewaters from a fixed-bed coal gasifier at the Department of Energy's Morgantown Energy Tech...
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STOMATAL RESPONSES OF DOUGLAS-FIR SEEDLINGS TO ELEVATED CARBON DIOXIDE AND TEMPERATURE DURING THE THIRD AND FOURTH YEARS OF EXPOSURE |
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Two major components of climate change, increasing atmospheric [CO2] and increasing temperature, may substantially alter the effects of water availability to plants through effects...
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STORM INLET FILTRATION DEVICE |
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Five field tests were conducted to evaluate the effectiveness of the Storm and Groundwater Enhancement Systems (SAGES) device for removing contaminants from stormwater. The SAGES d...
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STORMWATER TREATMENT AT CRITICAL AREAS: EVALUATION OF FILTRATION MEDIA |
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Past research has identified urban runoff as a major contributor to the degradation of urban streams and rivers. Filtration, especially "slow" filtration, is of interest for stormw...
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STRATOSPHERIC OZONE PROTECTION: AN EPA ENGINEERING PERSPECTIVE |
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The paper discusses stratospheric ozone protection from an EPA engineering perspective. Chlorine released in the atmosphere is a major factor in depleting the stratospheric ozone p...
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STREAM CHEMISTRY IN THE EASTERN UNITED STATES: I. SYNOPTIC SURVEY DESIGN, ACID-BASE STATUS, AND REGIONAL PATTERNS |
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To assess the regional acid-base status of streams in the Mid-Atlantic and Southeastern United States, spring baseflow chemistry was surveyed in a probability sample of 500 stream ...
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STREAM RESTORATION STRATEGIES FOR REDUCING RIVER NITROGEN LOADS |
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Despite decades of work implementing agricultural and urban best management practices to reduce the movement of excess nitrogen (N) from the land to aquatic ecosystems, the amount ...
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STRESS INTERACTIONS AND MYCRORRHIZAL PLANT RESPONSE: UNDERSTANDING CARBON ALLOCATION PRIORITIES |
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This paper presents a framework for studying responses of mycorrhizal roots to external stresses, including possible feedback effects, which are likely to occur. A conceptual model...
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STRUCTURE AND FUNCTION OF SULFATE-REDUCING PROKARYOTIC COMMUNITIES IN SEAGRASS BED SEDIMENTS |
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Sulfate-reducing prokaryotes (SRP) play a key role in the carbon and nutrient cycles of coastal marine, vegetated ecosystems, but the interactions of SRP communities with aquatic p...
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STRUCTURE OF DIBLOCK COPOLYMERS IN SUPERCRITICAL CARBON DIOXIDE AND CRITICAL MICELLIZATION PRESSURE. (R826115) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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STRUCTURE TOXICITY IN RELATIONSHIPS FOR A,B-UNSATURATED ALCOHOLS IN FISH |
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Previous toxicity testing with fathead minnows (Pimephales promelas) indicated that some unsaturated acetylenic and allylic alcohols can be metabolically activated, via alcohol deh...
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STRUCTURE-ACTIVITY STUDY OF PARACETAMOL ANALOGUES: INHIBITION OF REPLICATIVE DNA SYNTHESIS IN V79 CHINESE HAMSTER CELLS |
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Experimental and theoretical evidence pertaining to cytotoxic and genotoxic activity of paracetamol in biological systems was used to formulate a simple mechanistic hypothesis to e...
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STRUCTURES OF SOME KEPONE PHOTOPRODUCTS AND RELATED CHLORINATED PENTACYCLODECANES BY CARBON-13 AND PROTON NUCLEAR MAGNETIC RESONANCE |
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The pesticide Kepone, 1,1a,3,3a,4,5,5a,5b,6-decachlorooctahydro-1,3,4-metheno-2H-cyclobuta(cd)pentalen-2-one, the related compounds mirex, kelevan, a monohydro photoproduct of kele...
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STUDIES OF METHANOGENIC BACTERIA IN SLUDGE |
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Methanogenic bacteria were isolated from mesophilic anaerobic digesters. The isolates were able to utilize H2 and CO2 acetate, formate and methanol, but were not able to metabolize...
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STUDIES OF NOX REACTIONS AND O3 TRANSPORT IN SOUTHERN CALIFORNIA - FALL, 1976 |
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The report describes a four week study of oxides of nitrogen chemistry and ozone transport in and around the southcoast air basin of California in the fall of 1976. The data base w...
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STUDIES OF PROTONATION OF SOME AMINOPOLYCARBOXYLATES BY CARBON-13 NMR SPECTROSCOPY |
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(13)C NMR chemical shifts are used to evaluate successive protonations of the aminopolycarboxylate systems, diethylenetriaminepentaacetic acid (DTPA) and triethylenetetraminehexaac...
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STUDY OF CARBON MONOXIDE EXPOSURE OF RESIDENTS OF WASHINGTON, DC. AND DENVER, COLORADO |
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The report describes a study funded by the EPA and conducted by the Research Triangle Institute in 1982 and 1983 to evaluate methodology for collecting representative personal expo...
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STUDY OF CARBON MONOXIDE EXPOSURES OF RESIDENTS OF WASHINGTON, D.C. |
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The paper will describe a study conducted in the Washington, D.C., area during the winter of 1982-83 for the purpose of measuring the distribution of carbon monoxide (CO) exposures...
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STUDY OF FEASIBILITY OF HERBICIDE ORANGE CHLORINOLYSIS |
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A process termed chlorinolysis (exhaustive chlorination) was applied to samples of USAF Herbicide ORANGE. The ORANGE (50/50 volume mixture of the n-butyl esters of 2,4-D and 2,4,5-...
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STUDY OF PERSONAL EXPOSURE TO CARBON MONOXIDE IN DENVER, COLORADO |
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The target population for the study included all noninstitutionalized, nonsmoking residents of the urbanized portion of the metropolitan area who were between 18 and 70 years of ag...
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STUDY OF THE EFFECTIVENESS OF A CATALYTIC COMBUSTION DEVICE ON A WOOD BURNING APPLIANCE |
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The report gives results of operating a wood stove, incorporating a catalytic combustor, while burning air-dried oak at low burning rates. Gas composition was measured continuously...
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STUDY OF ULTRAFINE PARTICLES NEAR A MAJOR HIGHWAY WITH HEAVY-DUTY DIESEL TRAFFIC. (R827352C011) |
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Motor vehicle emissions usually constitute the most significant source of ultrafine particles (diameter <0.1  |
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STUDY OF WATER QUALITY IMPROVEMENTS DURING RIVERBANK FILTRATION AT THREE MIDWESTERN UNITED STATES DRINKING WATER UTILITIES |
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Riverbank filtration (RBF) is a process during which surface water is subjected to subsurface flow prior to extraction from wells. During infiltration and soil passage, surface wa...
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STUDYING FOREST ROOT SYSTEMS - AN OVERVIEW OF METHODOLOGICAL PROBLEMS |
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The study of tree root systems is central to understanding forest ecosystem carbon and nutrient cycles, nutrient and water uptake, C allocation patterns by trees, soil microbial po...
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STYRENE HYDROFORMYLATION IN SUPERCRITICAL CARBON DIOXIDE: RATE AND SELECTIVITY CONTROL. (R826694C640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SUBCELLULAR IONS BY X-RAY MICROANALYSIS FOR EVIDENCE OF HEPATOTOXICITY |
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The hypothesis that the influx of extracellullar Ca2+ across a damaged plasma membrane is the final common pathway for chemically mediated cell death has stirred considerable contr...
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SUBCHRONIC TOXICITY STUDY OF OZONATED AND OZONATED/CHLORINATED HUMICS IN SPRAGUE-DAWLEY RATS: A MODEL SYSTEM FOR DRINKING WATER DISINFECTION |
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Male and female Sprague-Dawley rats were administered drinking water containing humics (1 g/L) alone or after it had been ozonated or ozonated/chlorinated. he rats consumed the tre...
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SUBCHRONIC TOXICOLOGY OF HUMIC ACID FOLLOWING CHLORINATION IN THE RAT |
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A subchronic 90-day study was conducted with chlorinated and non-chlorinated humic acids with male Sprague-Dawley rats. Body weight gain, terminal organ and body weights, food and ...
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SUBCRITICAL (HOT) WATER/ETHANOL EXTRACTION OF NONYLPHENOL POLYETHOXY CARBOXYLATES IN INDUSTRIAL AND MUNICIPAL SLUDGES. (R821195) |
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Subcritical (hot) water with ethanol as modifier was used
to extract nonylphenol polyethoxy carboxylates (NPECs)
with 1-4 ethoxy groups from sludge samples. Quantitative |
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SUBSTITUENT EFFECTS AND ADDITIVITY IN THE CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTRA OF CHLORINATED NAPHTHALENES AND THEIR CHLORINATED NAPHTHOL METABOLITES |
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Carbon-13 and proton nuclear magnetic resonance spectra were obtained for 12 chlorinated naphthalenes and six chlorinated naphthols, some of which are metabolites of the naphthalen...
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SUBSTITUENT PARAMETER ANALYSIS OF THE CARBON-13 NUCLEAR MAGNETIC RESONANCE CHEMICAL SHIFTS OF 4-SUBSTITUTED P-TERPHENYLS |
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The effects, delta sigma values, of substituents at the 4-position of 1:1',4':1'-terphenyl on the (13)C NMR chemical shifts were measured....
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SUBSTITUTION REACTIONS FOR THE DETOXIFICATION OF HAZARDOUS CHEMICALS |
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Chemical Treatment is one of several treatment techniques used for the remediation of toxic and hazardous chemicals. Chemical treatment in this report is defined as substitution o...
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SUBSURFACE PROPERTY RIGHTS: IMPLICATIONS FOR GEOLOGIC CO2 SEQUESTRATION |
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The paper discusses subsurface property rights as they apply to geologic sequestration (GS) of carbon dioxide (CO2). GS projects inject captured CO2 into deep (greater than ~1 km) ...
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SUBSURFACE PROPERTY RIGHTS: IMPLICATIONS FOR GEOLOGIC CO2 STORAGE |
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The paper discusses subsurface property rights as they apply to geologic sequestration (GS) of carbon dioxide (CO2). GS projects inject captured CO2 into deep (greater than ~1 km) ...
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SUBSURFACE VOLATIZATION AND VENTILATION SYSTEM (SVVS) - INNOVATIVE TECHNOLOGY REPORT |
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This report summarizes the findings associated with a Demonstration Test of Environmental Improvement Technologies’ (EIT) Subsurface Volatilization and Ventilation System (SVVS) pr...
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SULFATE-REDUCING BACTERIA IN THE SEAGRASS RHIZOSPHERE |
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Seagrasses are rooted in anoxic sediments that support high levels of microbial activity including utilization of sulfate as a terminal electron acceptor which is reduced to sulfid...
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SUMMARY OF GAC (GRANULAR ACTIVATED CARBON) RESEARCH AT SEVERAL WATER UTILITIES |
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Granular activated carbon (GAC) has been in use for many years to remove taste and odors in drinking water. Within the past ten years, some utilities have seriously considered the ...
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SUMMARY OF JOINT DOD, EPA RESEARCH TO CONTROL VOC AND TOXIC EMISSIONS |
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The paper summarizes the results of joint projects conducted during last 6 years by the Department of Defense and EPA to control volatile organic compounds (VOCs) and toxic emissio...
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SUMMARY OF THE ISSUES WITH REGARD TO THE CARCINOGENICITY, MUTAGENICITY, AND EXPOSURE OF POLYCYCLIC ORGANIC MATTER (POM) |
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Polycyclic organic matter (POM) is emitted from a variety of sources in the environment. Evidence of the carcinogenicity of emissions from coke production, motor vehicles (includes...
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SUMMARY REPORT ON CORROSIVITY STUDIES IN COINCINERATION OF SEWAGE SLUDGE AND SOLID WASTE |
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Corrosion probe exposures were conducted in the Harrisburg, Pennsylvania Incinerator to determine the effects of burning low-chloride sewage sludge with municipal refuse. Probes ha...
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SUMMER 1990 ATLANTA OZONE PRECURSOR STUDY |
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During the summer of 1990, the U.S. Environmental Protection Agency (EPA) conducted a major monitoring study in Atlanta, Georgia, addressing the measurement of ozone and its precur...
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SUPERCRITICAL FLUID EXTRACTION AS A MEANS OF CLEANING AND DESORBING COMMON AIR SAMPLING SORBENTS |
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Supercritical fluid extraction (SFE) with carbon dioxide has become an increasingly popular alternative method to Soxhlet extraction for the measurement of organic compounds adsorb...
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SUPERCRITICAL FLUID EXTRACTION OF PARTICULATE AND ADSORBENT MATERIALS. PART 2 |
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The physical properties of supercritical fluids allow similar solvent strengths as liquids, but with higher diffusion coefficients, lower viscosities and an extended temperature ra...
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SUPERCRITICAL FLUID REGENERATION OF ACTIVATED CARBON FOR ADSORPTION OF PESTICIDES |
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The report describes the development of a new process for regenerating activated carbon, using supercritical CO2 as a desorbent. Supercritical CO2 in the range of 30-250 C and at p...
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SUPERCRITICAL FLUID REGENERATION OF ADSORBENTS |
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The report gives results of a program: (1) to perform studies supercritical (fluid) carbon dioxide (SCF CO2) regeneration of adsorbents, using samples of industrial wastewaters fro...
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SUPPORTED LIX-84 LIQUID MEMBRANES FOR METAL ION SEPARATION: A STUDY ON METAL ION SORPTION EQUILIBRIUM AND KINETICS |
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Supported 2-hydroxy-5-nonyl-acetophenone oxime (LIX-84) liquid membranes have potential applications for the removal (or recovery) of copper ions from waste streams. But, the stabi...
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SUPPRESSION EFFECT OF CO2 ON FPD TOTAL SULFUR AIR ANALYZERS AND RECOMMENDED CORRECTIVE ACTION |
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As part of quality assurance performance audits on three U.S. Environmental Protection Agency ambient air monitoring projects, the suppression in the total sulfur response due to c...
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SURROGATE PARAMETERS FOR MONITORING ORGANIC MATTER AND THM PRECURSORS |
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UV absorbance at 254 nm is a good surrogate parameter for estimating the raw water concentrations of organic carbon (NPTOC--nonpurgeable total organic carbon) and THM precursors (T...
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SURVEY OF CHEMICAL FACTORS IN SAGINAW BAY (LAKE HURON) |
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Water quality in Saginaw Bay, Michigan (western Lake Huron) was surveyed during 32 cruises in 1974 and 1975, as part of the International Joint Commission's Upper Lakes Reference S...
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SURVEY OF INDUSTRIAL APPLICATIONS OF AQUEOUS-PHASE ACTIVATED-CARBON ADSORPTION FOR CONTROL OF POLLUTANT COMPOUNDS FROM MANUFACTURE OF ORGANIC COMPOUNDS |
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This study covers industrial use of activated carbon for aqueous-phase applications. The report includes full-scale, pilot and laboratory granular and powdered activated carbon per...
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SURVEY OF INDUSTRIAL APPLICATIONS OF VAPOR-PHASE ACTIVATED-CARBON ADSORPTION FOR CONTROL OF POLLUTANT COMPOUNDS FROM MANUFACTURE OF ORGANIC COMPOUNDS |
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This study covers industrial use of activated carbon for vapor-phase applications. A listing of over 700 applications of vapor-phase carbon systems is made available for use in ide...
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SURVIVAL AND DEGRADATIVE CAPACITY OF PSEUDOMONAS PUTIDA INDUCED OR CONSTITUTIVELY EXPRESSING PLASMA-MEDIATED DEGRADATION OF 2,4-DICHLOROPHENOXYACETATE (TFD) IN SOIL |
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The survival of genetically altered Pseudomonas putida strains harboring an inducible plasmid, PRO101, or a constitutive plasmid, PRO103, was compared. hese plasmids encode for the...
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SURVIVAL AND EFFECTS OF WILD-TYPE, MUTANT, AND RECOMBINANT STREPTOMYCES IN A SOIL ECOSYSTEM |
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In a laboratory simulation, selected wild-type, mutant, and recombinant Streptomyces were released into a silt loam soil. trains included genetically enhanced lignin decomposers an...
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SUSPENDED AND BENTHIC SEDIMENT RELATIONSHIPS IN THE YAQUINA ESTUARY, OREGON: NUTRIENT PROCESSING |
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Measurements of nutrient loading and subsequent nutrient processing are fundamental for determining biogeochemical processes in rivers and estuaries. In Oregon coastal watersheds...
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SYNOPTIC METEOROLOGY AND AIR QUALITY PATTERNS IN THE ST. LOUIS RAPS PROGRAM |
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An objective, statistical synoptic weather map classification scheme developed by Lund to stratify map patterns for further study was used to type regional weather patterns. The in...
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SYNTHESES OF CROSSLINKABLE POLY(CARBOSILANE/SILOXANE)S BY HYDROSILATION IN TOLUENE AND SUPERCRITICAL CARBON DIOXIDE. (R825503) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SYNTHESIS, CHARACTERIZATION, AND PROPERTIES OF COPOLYMERS PREPARED IN DENSE CARBON DIOXIDE TOWARDS THE DEVELOPMENT OF A 157 NM PHOTORESIST. (R829586) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SYNTHESIZING ALCOHOLS AND KETONES BY PHOTOINDUCED CATALYTIC PARTIAL-OXIDATION OF HYDROCARBONS IN TI02 FILM REACTORS PREPARED BY THREE DIFFERENT METHODS |
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The partial oxidation of cyclohexane to cyclohexanol and cyclohexanone on UV irradiated titanium dioxide films in the presence of molecular oxygen at ambient temperatures and press...
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SYNTHETIC COPPER-CONTAINING PARTICLES ENHANCE ALLERGIC AIRWAY RESPONSES IN MICE |
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SYNTHETIC COPPER-CONTAINING PARTICLES ENHANCE ALLERGIC AIRWAY RESPONSES IN MICE. SH Gavett, MI Gilmour, and N Haykal-Coates. National Health and Environ Effects Research Lab, USE...
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SYNTHETIC FUEL PRODUCTION FROM SOLID WASTES |
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The work described in this report has two objectives: first, to evaluate potential catalysts for the commercial practice of the gasification of chars produced by the pyrolysis of m...
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SYNTHETIC ORGANIC CHEMICAL REMOVAL BY GRANULAR ACTIVATED CARBON |
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The paper is an overview of the adsorbability of synthetic organic chemicals (SOC) by granular activated carbon (GAC). The paper demonstrates the adsorbability by presenting data o...
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SYNTHETIC PARTICLES ENHANCE AIRWAY RESPONSES TO OVALBUMIN ANTIGEN IN BALB/C MICE |
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SYNTHETIC PARTICLES ENHANCE AIRWAY RESPONSES TO OVALBUMIN ANTIGEN IN BALB/CJ MICE. S H Gavett, N Haykal-Coates, and M I Gilmour. Experimental Toxicology Division, NHEERL, ORD, US...
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SYNTHETIC RESIN ADSORBENTS IN TREATMENT OF INDUSTRIAL WASTE STREAMS |
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The use of synthetic polymeric adsorbents for removal of organic pollutants from industrial waste streams is a viable alternative to more common treatment methods such as carbon ad...
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SYSTEMATIC SCANNING ELECTRON MICROSCOPY FOR EVALUATING COMBINED BIOLOGICAL/GRANULAR ACTIVATED CARBON TREATMENT PROCESSES |
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A semi-quantitative scanning electron microscope (SEK) analytical technique has been developed to examine granular activated carbon (GAC) utilized as media for biomass attachment i...
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SYSTEMATIC SCANNING ELECTRON MICROSCOPY TECHNIQUE FOR EVALUATING COMBINED BIOLOIGCAL/GRANULAR ACTIVATED CARBON TREATMENT PROCESSES |
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A systematic scanning election microscope analytical technique has been developed to examine granular activated carbon used a a medium for biomass attachment in liquid waste treatm...
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SYSTEMS FOR RAPID RANKING OF ENVIRONMENTAL POLLUTANTS: SELECTION OF SUBJECTS FOR SCIENTIFIC AND TECHNICAL ASSESSMENT REPORTS |
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This document reports the results of the development and testing of a system for rapidly ranking environmental pollutants. One potential use for the system is in choosing the most ...
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Sediment Microbial Enzyme Activity as an Indicator of Nutrient Limitation in Great Lakes Coastal Wetlands |
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This study, the first to link microbial enzyme activities to regional-scale anthropogenic stressors, suggests that microbial enzyme regulation of carbon and nutrient dynamics may b...
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Sediment denitrification and nitrification is enhanced by the presence of macrophytes in a restored agricultural stream, Black Earth Creek, WI USA |
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Restoration of habitats that support microbial processing can enhance nitrate removal in agricultural streams. Macrophytes are common both in-stream and in the wetted fringe of agr...
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Semi-Analytical Models of CO2 Injection into Deep Saline Aquifers: Evaluation of the Area of Review and Leakage through Abandoned Wells |
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This presentation will provide a conceptual preview of an Area of Review (AoR) tool being developed by EPA’s Office of Research and Development that applies analytic and semi-analy...
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Simulating the Vapour Phase Air/Water Exchange of p,p′-DDE, p,p′-DDT, Lindane, and 2,3,7,8-Tetrachlorodibenzodioxin |
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Uncertainties in our understanding of gaseous air/water exchange have emerged as major sources of concern in efforts to construct global and regional mass balances of both the gree...
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Smart Energy Resources Guide |
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Remedial actions taken to clean up hazardous waste sites for environmental restoration and potential reuse are often sources of diesel and greenhouse gas (GHG) emissions. Many rem...
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Soil carbon sequestration: Quantifying this ecosystem service |
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Soils have a crucial role in supplying many goods and services that society depends upon on a daily basis. These include food and fiber production, water cleansing and supply, nut...
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Sorption of PFOA and PFOS to Aquifer Sediment |
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During its years of operation, the Washington County Sanitary Landfill near St. Paul, Minnesota accepted both municipal and industrial solid waste. Several years of ground water mo...
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Sorption of PFOA and PFOS to Ground Water Sediment |
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During its years of operation, the Washington County Sanitary Landfill near St. Paul, Minnesota accepted both municipal and industrial solid waste. Several years of ground water mo...
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Spatial and Temporal Variability of Solar Ultraviolet Exposure of Coral Assemblages in the Florida Keys: Importance of Colored Dissolved Organic Matter |
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Solar UV radiation can have deleterious effects on coral assemblages in tropical and subtropical marine environments. We present evidence that UV exposure of coral reefs in the Flo...
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Spatial and Temporal Variability of Solar Ultraviolet Exposure of Coral Assemblages in the Florida Keys: Importance of Colored Dissolved Organic Matter x |
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Solar ultraviolet (UV) radiation can have deleterious effects on coral assemblages in tropical and subtropical marine environments, but little information is available on UV penetr...
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Spatially- and Temporally-Resolved Measurements of Roadway Air Pollution Using a Zero-Emission Electric Vehicle |
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Vehicle-related air pollution has an intrinsically dynamic nature. Recent field measurements and modeling work have demonstrated that near-road topography may modify levels of air ...
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Superfund Innovative Technology Evaluation: Demonstration Bulletin: Organic Extraction Utilizing Solvents |
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This technology utilizes liquified gases as the extracting solvent to
remove organics, such as hydrocarbons, oil and grease, from wastewater or contaminated sludges and soils. Car...
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Synthesis Of Reactive Nano-Fe/Pd Bimetallic System-Impregnated Activated Carbon For The Simultaneous Adsorption And Dechlorination Of PCBs |
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Synthesis and use of reactive metal particles have shown significant environmental implications for the remediation of groundwater and sediment contaminated with chlorinated compou...
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TAILORING ACTIVATED CARBONS FOR ENHANCED REMOVAL OF NATURAL ORGANIC MATTER FROM NATURAL WATERS. (R828157) |
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Several pathways have been employed to systematically modify two granular activated carbons (GACs), F400 (coal-based) and Macro (wood-based), for examining adsorption of dissolv...
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TARGET ORGAN TOXICOLOGY OF HALOCARBONS COMMONLY FOUND CONTAMINATING DRINKING WATER |
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Some of the most frequent drinking water contaminants are organic halocarbons. The paper will initially summarize the target organ effects of three halocarbons: 1,2-dichloroethane,...
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TBA IN GROUND WATER FROM THE NATURAL BIODEGRADATION OF MTBE |
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At many UST spills, the concentrations of TBA in ground water are much higher than would be expected from the presence of TBA in the gasoline originally spilled. The ratio of conce...
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TECHNICAL BASIS FOR ESTABLISHING SEDIMENT QUALITY CRITERIA FOR NONIONIC ORGANIC CHEMICALS BY USING EQUILIBRIUM PARTITIONING |
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The purpose of this review paper is to present the technical basis for establishing sediment quality criteria using equilibrium partitioning (EqP). quilibrium partitioning is chose...
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TECHNICAL BASIS FOR ESTABLISHING SEDIMENT QUALITY CRITERIA FOR NONIONIC ORGANIC CHEMICALS USING EQUILIBRIUM PARTITIONING |
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The purpose of this review paper is to present the technical basis for establishing sediment quality criteria using equilibrium partitioning (EqP). quilibrium partitioning is chose...
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TECHNICAL CHALLENGES ASSOCIATED WITH ASSESSING THE IN VITRO PULMONARY TOXICITY OF CARBON NANOTUBES |
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Nanotechnology continues to produce a large number of diverse engineered nanomaterials (NMs) with novel physicochemical properties for a variety of applications. Test methods that ...
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TECHNICAL RESOURCE DOCUMENT: TREATMENT TECHNOLOGIES FOR HALOGENATED ORGANIC CONTAINING WASTES. VOLUME 1 |
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The halogenated organics technical resource document (TRD) is one of a series of five TRDs that are being prepared by the Hazardous Waste Engineering Research Laboratory. It provid...
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TECHNICAL RESOURCE DOCUMENT: TREATMENT TECHNOLOGIES FOR METAL/CYANIDE-CONTAINING WASTES. VOLUME 3 |
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The Technical Resource Document provides information that can be used by environmental regulatory agencies and others as a source of technical information for waste management opti...
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TECHNIQUES AND APPROACHES TO EVALUATE THE NATURAL ATTENUATION OF MTBE |
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Natural anaerobic biodegradation is the most important processes controlling natural attenuation of MTBE along a flow path. However, natural biological degradation has been partic...
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TECHNIQUES FOR THE MEASUREMENT OF AEROSOL CARBON CONTENT |
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The report describes two different techniques for total and elemental carbon analysis developed under this grant. Both methods are totally instrumental, automated, and non-destruct...
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TECHNOLOGICAL CONSIDERATIONS FOR PLANNING THE GLOBAL CARBON FUTURE |
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The paper summarized some of the recent literature relating to the longer-term technological considerations affecting the atmospheric level of carbon dioxide (CO2), the dominant va...
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TECHNOLOGY EVALUATION FOR PRIORITY POLLUTANT REMOVAL FROM DYESTUFF MANUFACTURE WASTEWATERS |
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Laboratory-scale studies were conducted to establish the technical feasibility of employing certain processes, including ozonation, GAC adsorption and biophysical (PACT) treatment,...
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TECHNOLOGY EVALUATION REPORT SITE PROGRAM DEMONSTRATION TEST, SHIRCO INFRARED INCINERATION SYSTEM, PEAK OIL, BRANDON, FLORIDA. VOLUME 1 |
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A Shirco Infrared System used for a removal action at a PCB-containing oil refining waste site in Brandon, Florida (a suburb of Tampa) was evaluated. The evaluation included a dete...
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TECHNOLOGY EVALUATION REPORT SITE PROGRAM DEMONSTRATION TEST, SHIRCO INFRARED INCINERATION SYSTEM, PEAK OIL, BRANDON, FLORIDA. VOLUME 2 |
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A Shirco Infrared system used for a removal action at a PCB-containing oil refining waste site in Brandon, Florida (a suburb of Tampa) was evaluated. The evaluation included a dete...
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TECHNOLOGY EVALUATION REPORT SITE PROGRAM DEMONSTRATION TEST, TERRA VAC IN SITU VACUUM EXTRACTION SYSTEM, GROVELAND MASSACHUSETTS |
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An evaluation was made of the performance of Terra Vac Inc.'s vacuum extraction systerl during a 56-day demonstration test run at Valley Manufactured Product Conpany's site in Grov...
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TECHNOLOGY EVALUATION REPORT: BIOLOGICAL TREATMENT OF WOOD PRESERVING SITE GROUNDWATER BY BIOTROL, INC. |
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This report provides the in-depth data analysis from the SITE Program's six-week demonstration of BioTrol's Aqueous Treatment System (BATS) at the MacGillis and Gibbs Company wood ...
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TECHNOLOGY EVALUATION REPORT: MAGNUM WATER TECHNOLOGY CAV-OX CAVITATION OXIDATION PROCESS |
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This report evaluates the CAV-OX cavitation oxidation process's ability to remove volatile organic compounds (VOC) present in aqueous wastes. he CAV-OX process was developed by Mag...
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TECHNOLOGY EVALUATION REPORT: PEROX-PURE CHEMICAL OXIDATION TECHNOLOGY |
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This report evaluates the perox-pure chemical oxidation technology's ability to remove volatile organic compounds (VOC) and other organic contaminants present in liquid wastes. his...
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TECHNOLOGY EVALUATION REPORT: SITE PROGRAM DEMONSTRATION TEST, TERRA VAC IN SITU VACUUM EXTRACTION SYSTEM, GROVELAND, MASSSACHUSETTS (VOLUME II) |
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An evaluation was made of the performance of Terra Vac Inc.'s vacuum extraction system during a 56-day demonstration test run at Valley Manufactured Product Conpany's site in Grove...
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TECHNOLOGY FOR REDUCTION OF CO2 EMISSIONS FROM THE TRANSPORTATION SECTOR |
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The article gives results of a preliminary assessment of the Hydrocarb Process which indicates that substantially more fuel energy can be produced--and at lower cost--than other cu...
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TEDLAR BAG SAMPLING SYSTEM FOR TOXIC ORGANIC COMPOUNDS IN SOURCE EMISSION SAMPLING AND ANALYSIS |
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A new Tedlar bag sampling system which consists of a 5-7-L bag and operates at a 50-mL/min sampling rate is proposed. his sampling system is much smaller than the traditional Tedla...
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TEMPERATURE CORRECTION FORMULAE FOR ADJUSTING ESTIMATES OF EMISSIONS FROM AUTOMOBILES. VOLUME I |
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This report describes an analysis of the effects of temperature on the emissions of hydrocarbons, carbon monoxide, and oxides of nitrogen from autombiles. The analysis was conducte...
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TEMPERATURE SENSITIVITY OF SOIL RESPIRATION AND ITS EFFECTS ON ECOSYSTEM CARBON BUDGET: NONLINEARITY BEGETS SURPRISES. (R827676) |
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Nonlinearity is a salient feature in all complex systems, and it certainly characterizes biogeochemical cycles in ecosystems across a wide range of scales. Soil carbon emission ...
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TEMPORAL ALLOCATION OF 14C TO EXTRAMATRICAL HYPHAE OF ECTOMYCORRHIZAL PONDEROSA PINE SEEDLINGS |
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Ponderosa pine seedlings were inoculated with Hebeloma crustuliniforme either in growth pouches before they were transplanted to root-mycocosms (P seedlings), or at the time of tra...
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TEMPORAL FEATURES IN OBSERVED AND SIMULATED METEOROLOGY AND AIR QUALITY OVER THE EASTERN UNITED STATES |
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In this study, temporal scale analysis is applied as a technique to evaluate an annual simulation of meteorology, O3, and PM2.5 and its chemical components ov...
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TEMPORAL TRENDS OF BLACK CARBON CONCENTRATIONS AND REGIONAL CLIMATE FORCING IN THE SOUTHEASTERN UNITED STATES. (R825248) |
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The effect of black carbon (BC) on climate forcing is potentially important, but its estimates have large uncertainties due to a lack of sufficient observational data. The BC ma...
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TEMPORAL VARIABILITY IN PHYSICAL SPECIATION OF METALS DURING A WINTER RAIN-ON-SNOW EVENT |
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Particulate matter in urban rivers transports a significant fraction of pollutants, changes rapidly during storm events and is difficult to characterize. In this study, the physica...
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TEN DAY EXPOSURES TO CARBONYL SULFIDE PRODUCE BRAINSTEM LESIONS AND CHANGES IN BRAINSTEM AUDITORY EVOKED RESPONSES IN FISCHER 344N RATS. |
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Carbonyl sulfide (COS) is a chemical intermediate in the production of pesticides and herbicides, a metabolite of carbon disulfide, a byproduct of the combustion of organic materia...
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TERATOGEN METABOLISM: THALIDOMIDE ACTIVATION IS MEDIATED BY CYTOCHROME P-450 |
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A metabolite of thalidomide generated by hepatic microsomes inhibited the attachment of tumor cells to concanavalin A-coated polyethylene. Evidence that metabolite formation is med...
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TERMINAL ELECTRON ACCEPTING PROCESSES IN THE ALLUVIAL SEDIMENTS OF A HEADWATER STREAM |
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Chemical fluxes between catchments and streams are influenced by biochemical processes in the groundwater-stream water (GW-SW) ecotone, the interface between stream surface water...
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TERRESTRIAL CARBON DYNAMICS:CASE STUDIES IN THE FORMER SOVIET UNION, THE CONTERMINOUS UNITED STATES, MEXICO AND BRAZIL |
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NO ABSTRACT PROVIDED...
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TERRESTRIAL ECOSYSTEM SIMULATOR |
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The Terrestrial Habitats Project at the Western Ecology Division (Corvallis, OR) is developing tools and databases to meet the needs of Program Office clients for assessing risks t...
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TEST AND EVALUATION OF A POLYMER MEMBRANE PRECONCENTRATOR |
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The report gives results of an evaluation of the applicability of membrane systems as a preconcentrator and defines operating parameters of a membrane system. Advantages of such a ...
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TEST METHOD FOR THE MEASUREMENT OF METHANOL EMISSIONS FROM STATIONARY SOURCES |
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Methanol was designated under Title III of the Clean Air Act Amendments of 1990 as a pollutant to be regulated. he U.S. EPA, through a contract with Research Triangle Institute, ha...
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TEST METHODS TO CHARACTERIZE PARTICULATE MATTER EMISSIONS AND DEPOSITION RATES IN A RESEARCH HOUSE |
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The paper discusses test methods to characterize particulate matter (PM) emissions and deposition rates in a research house. In a room in the research house, specially configured ...
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TEST RESULTS FOR FUEL CELL OPERATION ON ANAEROBIC DIGESTER GAS |
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EPA, in conjunction with ONSI Corp., embarked on a project to define, design, test, and assess a fuel cell energy recovery system for application at anaerobic digester waste water ...
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TESTING AND EVALUATION OF PERMEABLE MATERIALS FOR REMOVING POLLUTANTS FROM LEACHATES AT REMEDIAL ACTION SITES |
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In order to better understand the potential effectiveness of permeable treatment systems, four readily available, low-cost permeable materials, coal, limestone, fly ash and a soil ...
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TESTING CMAQ CHEMISTRY SENSITIVITIES IN BASE CHASE AND EMISSION CONTROL RUNS AT SEARCH AND SOS 99 SURFACE SITES IN THE SOUTHEASTERN UNITED STATES |
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CMAQ was run to simulate urban conditions in the southeastern U.S. in July 1999 at 32, 8, and 2 km grid spacings. Runs were made with two older mechanisms, Carbon Bond IV (CB4) and...
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TESTING OF FUEL CELLS TO RECOVER ENERGY FROM LANDFILL GAS: GROTON LANDFILL |
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The report summarizes the results of follow-on tests following a four-phase EPA program. The environmental impact of widespread use of this concept would be a significant reduction...
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TESTING OF THE INSECT PEST CONTROL FUNGUS BEAUVERIA BASSIANA IN GRASS SHRIMP PALAEMONETES PUGIO |
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Embryos, larvae and adult grass shrimp Palaemonetes pugio were exposed to spores of the insect-control fungus Beauveria bassiana. onidiospores attached to embryos held by gravid fe...
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TESTING THE FLORISTIC QUALITY ASSESSMENT INDEX AS AN INDICATOR OF WETLAND CONDITION ALONG GRADIENTS OF HUMAN INFLUENCE |
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Biological indicators of ecosystem integrity are increasingly being sought for use in ecosystem assessment and goal-setting for restoration projects. We tested the effectiveness of...
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TESTING THE VALIDITY OF THE LOGNORMAL PROBABILITY MODEL: COMPUTER ANALYSIS OF CARBON MONOXIDE DATA FROM U.S. CITIES |
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A stratified sample consisting of 11 data sets from an original list of 166 CO air quality data sets in SAROAD was selected as a 'national crossection' of observed U.S. CO concentr...
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TETRAHALOINDATE(III)-BASED IONIC LIQUIDS IN THE COUPLING REACTION OF CARBON DIOXIDE AND EPOXIDES TO GENERATE CYCLIC CARBONATES: H-BONDING AND MECHANISTIC STUDIES |
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The microwave reactions of InX3 with [Q]Y produce a series of tetrahaloindate(III)-based ionic liquids (ILs) with a general formula of [Q][InX3Y] (Q = imidazo...
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TETRAVALENT LEAD: A HITHERTO UNRECOGNIZED CONTROL OF TAP WATER LEAD CONTAMINATION |
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Almost all of the theoretical framework underlying the control of plumbosolvency and lead release has been based on the presumption that the lead release is explicable by Pb(II) so...
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TEXACO GASIFICATION PROCESS - INNOVATIVE TECHNOLOGY EVALUATION REPORT |
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This report summarizes the evaluation of the Texaco Gasification Process (TGP) conducted under the U.S. Environmental Protection Agency (EPA) Superfund Innovative Technology Evalua...
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TEXTILE DYEING WASTEWATERS: CHARACTERIZATION AND TREATMENT |
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The report gives results of an examination of the biological, chemical, and physical treatability of wastewaters from selected typical dye baths. Twenty systems providing a broad c...
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THE 2006 CMAQ RELEASE AND PLANS FOR 2007 |
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The 2006 release of the Community Multiscale Air Quality (CMAQ) model (Version 4.6) includes upgrades to several model components as well as new modules for gas-phase chemistry and...
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THE ABSENCE AND APPLICATION OF STABLE CARBON ISOTOPIC FRACTIONATION DURING THE REDUCTIVE DECHLORINATION OF POLYCHLORINATED BIPHENYLS. (R828161) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE APPLICATION OF PRB TECHNOLOGY AT TWO SITES: LESSONS LEARNED AFTER 7 YEARS OF PERFORMANCE MONITORING |
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In June of 1996, a 46 m long, 7.3 m deep, and 0.6 m wide permeable reactive barrier (continuous wall configuration) of zero-valent iron was installed at the USCG-SC site. The reac...
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THE ASSOCIATION OF LAND USE/LAND COVER AND NUTRIENT LEVELS IN MARYLAND STREAMS |
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Anthropogenic nonpoint sources of nutrients are known to cause accelerated eutrophication of estuaries. The Chesapeake Bay is one of the world's largest estuaries exhibiting the eu...
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THE BIOLOGICAL RESPONSE OF A SMALL CATCHMENT TO CLEAR-CUTTING |
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We modified a Plant-Soil Model (Stieglitz et al, 2006, GBC) that simulates the effects of a disturbance on stocks and fluxes of carbon (C) and nitrogen (N) in terrestrial ecosystem...
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THE CARBON DIOXIDE LEAKAGE FROM CHAMBERS MEASURED USING SULFUR HEXAFLUORIDE |
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In plant chamber studies, if Co2 leaking from a chamber is not quantified, it can lead to an overestimate of assimilation rates and an underestimate of respiration rates: consequen...
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THE COST OF REMOVING CHLOROFORM AND OTHER TRIHALOMETHANES FROM DRINKING WATER SUPPLIES |
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This research effort was conducted to provide an in-depth examination of the costs associated with the use of activated carbon, ozonation, aeration, and chlorine dioxide for remova...
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THE DETERMINATION OF DITHIOCARBAMATE PESTICIDES IN INDUSTRIAL AND MUNICIPAL WASTEWATERS: METHOD 630 |
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This is a colorimetric method applicable to the determination of selected pesticides in municipal and industrial discharges as provided under 40CFR 136.1. A sample is digested with...
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THE DETERMINATION OF ORGANIC PEROXIDES USING HIGH PERFORMANCE LIQUID CHROMATOGRAPHY AND AMPEROMETRIC DETECTION |
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The use of ozonation as an alternative to chlorination for drinking water treatment is increasing. Ozone has proven to be particularly efficacious for the removal of taste, odor an...
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THE DETERMINATION OF TOTAL ORGANIC HALIDE IN WATER: A COMPARATIVE STUDY OF TWO INSTRUMENTS |
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Total organic halide (TOX) analyzers are commonly used to measure the amount of dissolved halogenated organic byproducts in disinfected waters. ecause of the lack of information on...
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THE DETERMINATION OF TOTAL ORGANIC HALIDE IN WATER: AN INTERLABORATORY COMPARATIVE STUDY OF TWO METHODS |
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Total organic halide (TOX) analyzers are commonly used to measure the amount of dissolved halogenated organic byproducts in disinfected waters. Because of the lack of information o...
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THE DEVELOPMENTAL TOXICITY OF PERFLUOROALKYL ACIDS AND THEIR DERIVATIVES |
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Perfluoroalkyl acids such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) have applications in numerous industrial and consumer products. Alt...
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THE DISTRIBUTION OF ORGANIC CARBON IN MAJOR COMPONENTS OF FORESTS LOCATED IN FIVE LIFE ZONES OF VENEZUELA |
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One of the major uncertainties concerning the role of tropical forests in the global carbon cycle is the lack of adequate data on the carbon content of all their components. The go...
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THE ECOLOGICAL EFFECTIVENESS OF PONDS AND WETLANDS AS "BEST MANAGEMENT PRACTICES (BMPS)" FOR STREAMS IN DEVELOPING LANDSCAPES |
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Ponds and constructed wetlands, also referred to as detention/retention basins, have a long history as best management practices (BMPs) used to mitigate the impacts of stormwater r...
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THE EFFECT OF ACTIVATED CARBON SURFACE MOISTURE ON LOW TEMPERATURE MERCURY ADSORPTION |
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Experiments with elemental mercury (Hg0) adsorption by activated carbons were performed using a bench-scale fixed-bed reactor at room temperature (27 degrees C) to determine the ro...
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THE EFFECT OF ALLOWANCE ALLOCATION ON THE COST OF CARBON EMISSION TRADING. (R828628) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE EFFECT OF CHLORINE EMISSIONS ON TROPOSPHERIC OZONE IN THE UNITED STATES |
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The effect of chlorine emissions on atmospheric ozone in the continental United States was evaluated. Atmospheric chlorine chemistry was combined with the carbon bond mechanism and...
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THE EFFECT OF ENVIRONMENTAL CHEMICALS ON HUMAN HEALTH |
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Humans and animals have always been exposed to chemicals in our environments - natural products in foods, smoke from cooking fires, sewage in drinking water, pesticides from plants...
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THE EFFECT OF ENVIRONMENTAL CHEMICALS ON HUMAN HEALTH -- USCF |
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Humans and animals have always been exposed to chemicals in our environment - natural products in foods, smoke from cooking fires, sewage in drinking water, pesticides from plants....
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THE EFFECT OF FLUORIDE ON LEAD SOLUBILITY |
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Difficulties in predicting and controlling lead corrosion are encountered by hundreds of water systems across the country. Inorganic carbonate, sulfate, silicate, orthophosphate, p...
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THE EFFECT OF IRRADIANCE SPECTRA ON THE PHOTOACTIVATED TOXICITY OF THREE POLYCYCLIC AROMATIC HYDROCARBONS |
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Photoinduced toxicity of polycyclic aromatic hydrocarbons (PAHs) is dependent on the concentration of compounds present and the dose of light recieved. Of the light present, only t...
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THE EFFECT OF OZONE ON BELOW-GROUND CARBON ALLOCATION IN WHEAT |
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Short term 14CO2 pulse and chase experiments were conducted in order to investigate the effect ozone on below-ground carbon allocation in spring wheat seedlings (Triticum aestivumL...
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THE EFFECT OF PH AND DISSOLVED INORGANIC CARBON ON THE PROPERTIES OF IRON COLLOIDAL SUSPENSIONS |
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Discolored water resulting from suspended iron particles is a relatively common drinking water consumer complaint. These particles result from the oxygenation of Fe(II), and this ...
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THE EFFECT OF PH, PHOSPHATE AND OXIDANT ON THE REMOVAL OF ARSENIC FROM DRINKING WATER DURING IRON REMOVAL |
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Arsenic is a naturally occurring drinking water contaminant that has known adverse human health effects. The recent compilation of new health effects data prompted the U.S. Enviro...
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THE EFFECT OF POWERED ACTIVATED CARBON IN A PETROLEUM REFINERY ACTIVATED SLUDGE TREATMENT SYSTEM |
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The purpose of this research program was to determine the effect of the addition of powdered activated carbon (PAC) to refinery activated sludge systems. Bench-scale and full-scale...
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THE EFFECT OF PRECIPITATION ON ORGANIC CARBON COMPONENTS IN BAYOU TEXAR, FLORIDA |
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This study examined the relationship between precipitation and organic carbon in Bayou Texar, part of Florida's Pensacola Bay system in the northern Gulf of Mexico. Weekly samples ...
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THE EFFECT OF RELATIVE HUMIDITY ON THE UPTAKE OF AROMATIC OXIDATION PRODUCTS ON SUBMICRON AMMONIUM SULFATE AEROSOL |
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Epidemiological studies have suggested that fine particulate matter (<2.5 um) is correlated with daily mortality and morbidity in urban areas. At present, no plausible biological...
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THE EFFECT OF WATER (VAPOR-PHASE) AND CARBON ON ELEMENTAL MERCURY REMOVAL IN A FLOW REACTOR |
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The paper gives results of studying the effect of vapor-phase moisture on elemental mercury (Hgo) removal by activated carbon (AC) in a flow reactor. tests involved injecting AC in...
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THE EFFECTS OF COMBINED OZONATION AND FILTRATION ON DISINFECTION BY-PRODUCT FORMATION. (R830908) |
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The effects of combined ozonation and membrane filtration on the removal of the natural organic matter (NOM) and the formation of disinfection by-products (DBPs) were investigat...
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THE EFFECTS OF ECOSYSTEM RESTORATION ON NITROGEN PROCESSING IN AN URBAN MID-ATLANTIC PIEDMONT STREAM |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. The US Environmental Protection Agency, US Geological Survey, Institute of Ecosystem Studies,...
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THE EFFECTS OF ECOSYSTEM RESTORATION ON NITROGEN PROCESSING IN AN URBAN MID-ATLANTIC PIEDMONT STREAM |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. The US EPA, USGS, Institute of Ecosystem Studies, and Baltimore County Dept. of Environmental...
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THE EFFECTS OF FUNCTIONALIZED AND NON-FUNCTIONALIZED CARBON NANOTUBES ON ROOT ELONGATION OF SELECTED CROP SPECIES |
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Single-walled carbon nanotubes (SWNT) have many potential beneficial uses with additional applications constantly being investigated. However, these unique properties create a pot...
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THE EFFECTS OF LAND-USE/LAND-COVER, STREAM FLOW, AND INTER-ANNUAL CLIMATE ON THE MAGNITUDE AND TIMING OF N, P,, AND OC CONCENTRATIONS IN COASTAL PLAN WATERSHEDS |
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In-stream nitrogen, phosphorus, organic carbon, and suspended sediment concentrations were measured in 18 sub-basins over two annual cycles to assess how land-use/land-cover (LULC)...
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THE EFFECTS OF OXIDANT AIR POLLUTANTS ON SOYBEANS, SNAP BEANS AND POTATOES |
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During the past 5 years the impact of photochemical oxidants on soybeans and snap beans in Maryland and on potatoes in Virginia and Delaware was assessed with open-top chambers. Th...
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THE FOUNDATIONS OF ORGANIC POLLUTANT ANALYSIS |
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Systematic analysis of organic pollutants began a quarter century ago with the decision to apply current methods of organic qualitative analysis to multigram amounts of mixed organ...
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THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
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Sodium bromide and Rhodamine WT were used as conservative tracers to examine the hydrologic characteristics of seven tundra streams in Arctic Alaska, during the summers of 1994-199...
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THE IMPACT OF MUNICIPAL SOLID WASTE MANAGEMENT ON GREENHOUSE GAS EMISSIONS IN THE UNITED STATES |
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Technological advancements in United States (U.S.) municipal solid waste (MSW) disposal and a focus on the environmental advantages of integrated MSW management have greatly reduce...
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THE IMPACTS OF CLIMATE CHANGE ON RICE YIELD: A COMPARISON OF FOUR MODEL PERFORMANCES |
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Increasing concentrations of carbon dioxide (CO2) and other greenhouse gases are expected to modify temperature and rainfall the next 50-100 years. echanisms and hypotheses of plan...
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THE IMPORTANCE OF ORGANIC MATTER DISTRIBUTION AND EXTRACT SOIL:SOLUTION RATIO ON THE DESORPTION OF HEAVY METALS FROM SOILS |
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The lability (mobility and bioavailability) of metals varies significantly with soil properties for similar total soil metal concentrations. We studied desorption of Cu, Ni and Zn,...
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THE IMPORTANCE OF ORGANIC MATTER DISTRIBUTION AND EXTRACT SOIL:SOLUTION RATIO ON THE DESORPTION OF HEAVY METALS FROM SOILS: JOURNAL ARTICLE |
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NRMRL-CIN-1768
Ying, Y, Impellitteri**, C.A., You, S-J., and Allen, H.E. The Importance of Organic Matter
Distribution and Extract Soil:Solution Ratio on the Desorption of Heavy M...
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THE IMPORTANCE OF STRAIN SPECIFIC METABOLIC PARAMETERS IN PHYSIOLOGICALLY BASED PHARMACOKINETIC (PBPK) MODELS: CARBON TETRACHLORIDE (CC14) AS AN EXAMPLE |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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THE INFLUENCE OF AIR MASS HISTORY ON BLACK CARBON CONCENTRATIONS AND REGIONAL CLIMATE FORCING IN SOUTHEASTERN UNITED STATES. (R825248) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE INFLUENCE OF CARBON BURNOUT ON SUBMICRON PARTICLE FORMATION FROM EMULSIFIED FUEL OIL COMBUSTION |
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The paper gives results of an examination of particle behavior and particle size distributions from the combustion of different fuel oils and emulsified fuels in three experimental...
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THE INFLUENCE OF ORGANIC MATTER QUALITY ON THE TOXICITY AND PARTIONING OF SEDIMENT-ASSOCIATED FLUORANTHENE |
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Organic matter in sediment is derived from many sources, including dead plants and animals, fecal matter, and flocculated colloidal organic matter. hemical partitioning and toxicit...
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THE INFLUENCE OF TOTAL ORGANIC CARBON AND UV-B RADIATION ON ZN TOXICITY AND BIOACCUMULATION IN AQUATIC COMMUNITIES. (R829515) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE INFLUENCE OF TOTAL ORGANIC CARBON AND UV-B RADIATION ON ZN TOXICITY AND BIOACCUMULATION IN AQUATIC COMMUNITIES. (R829640) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE LBA PROJECT: NUTRIENT CYCLES AND TRACE GAS EXCHANGE IN SAVANNAS OF CENTRAL BRAZIL |
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The Cerrado of central Brazil is one of the largest savannah regions on Earth. The stressors affecting ecosystems in this region, including deforestation, fire, soil degradation, u...
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THE METABOLISM OF NALED INHALED BY RATS |
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Naled (Dibrom) was prepared with a (14)carbon label in the 1-ethyl position. The labeled compound was administered in appropriate formulation vehicles to female rats by the inhalat...
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THE MID-ATLANTIC INTEGRATED ASSESSMENT MAIA - ESTUARIES 1997-1998 SUMMARY REPORT |
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During the summers of 1997-98, a consortium of federal and state environmental agencies conducted the Mid-Atlantic Integrated Assessment (MAIA) program to characterize the environm...
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THE NIST-EPA INTERAGENCY AGREEMENT ON MEASUREMENTS AND STANDARDS IN AEROSOL CARBON: SAMPLING REGIONAL PM 2.5 FOR THE CHEMOMETRIC OPTIMIZATION OF THERMAL-OPTICAL ANALYSIS |
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Results from the NIST-EPA Interagency Agreement on Measurements and Standards in Aerosol Carbon: Sampling Regional PM2.5 for the Chemometric Optimization of Thermal-Optical Analysi...
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THE OCCURRENCE OF A NEW GENERATION OF DBPS (BEYOND THE ICR) |
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A nationwide survey of 12 full-scale treatment plants for disinfection by-products (DBPs) was initiated in the U.S. in 2000. Approximately 50DBPs that rated a high priority for po...
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THE OPTIMIZATION OF THERMAL OPTICAL ANALYSIS FOR THE MEASUREMENT OF BLACK CARBON IN REGIONAL PM2.5: A CHEMOMETRIC APPROACH REPORT |
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In thermal-optical analysis (TOA), particulate organic carbon (OC) as well as black carbon (BC) must be quantified. Both the BC that is native to the filter and instrument-produced...
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THE PARADOX OF THE PLANKTON: COMMUNITY STRUCTURE PROMOTES BLOOMS |
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ABSTRACT: The 'paradox of the plankton' refers to commensalism as well as symbiosis, predation, and impacts of non equilibrium conditions between two planktonic
competitors....
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THE PHASE BEHAVIOR OF FLUORINATED DIOLS, DIVINYL ADIPATE, AND A FLUORINATED POLYESTER IN SUPERCRITICAL CARBON DIOXIDE. (R828131) |
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The use of supercritical carbon dioxide as a reaction medium for polyester synthesis is hindered by the low solubility of diols in CO2. However, it has been previousl...
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THE PHOTOCHEMICAL FORMATION AND GAS-PARTICLE PARTITIONING OF OXIDATION PRODUCTS OF DECAMETHYL CYCLOPENTASILOXANE AND DECAMETHYL TETRASILOXANE IN THE ATMOSPHERE. (R826771) |
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AbstractDecamethyl cyclopentasiloxane (D5) and decamethyl tetrasiloxane (MD2M) were injected into a smog chamber containing fine Arizona road dust...
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THE PHYSICAL AND CHEMICAL CHARACTERIZATION OF THE EMISSIONS FROM A RESIDENTIAL OIL BOILER |
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The toxicity of emissions from the combustion of home heating oil and the use of residential oil boilers (ROB) is an important health concern. Yet scant physical and chemical info...
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THE POTENTIAL INFLUENCES OF FACE VELOCITY ON PM ARTIFACT LOSSES FOR EXPOSURE SAMPLERS USING TEFLON FILTER COLLECTION SUBSTRATES |
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The influences of artifact formations and losses on Particulate Matter (PM) sampler collection surfaces are well documented, especially for nitrates (Hering and Cass, 1999), and ...
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THE QUANTITY AND TURNOVER OF DEAD WOOD IN PERMANENT FOREST PLOTS IN SIX LIFE ZONES OF VENEZUELA |
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Dead wood can be an important component of the carbon pool in many forests, but few measurements have been made of this pool in tropical forests. To fill this gap, we determined th...
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THE RELATIVE FATE OF CARBON AMONG DIFFERENT INTERTIDAL MARSH COMMUNITIES |
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The fate of marsh production determines the functional role of marshes in estuarine carbon dynamics. Differences in the physicochemical environment, largely related to the mixing o...
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THE RELATIVE IMPORTANCE OF NUTRIENT ENRICHMENT AND HERBIVORY ON MACROALGAL COMMUNITIES NEAR NORMAN'S POND CAY, EXUMAS CAYS, BAHAMAS: A "NATURAL" ENRICHMENT EXPERIMENT. (R830414) |
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The simultaneous effects of grazing and nutrient enrichment on macroalgal communities were experimentally investigated using plastic mesh enclosure/exclosure cages along a natur...
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THE REMOVAL OF GLYPHOSATE FROM DRINKING WATER |
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The effectiveness of granulated activated carbon (GAC), packed activated carbon (PAC), conventional treatment, membranes, and oxidation for removing glyphosate from natural waters ...
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THE REMOVAL OF METALS AND VIRUSES IN ADVANCED WASTEWATER TREATMENT SEQUENCES |
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An extensive study of metals and virus removals by advanced wastewater treatment processes was conducted in Dallas, Texas from June 1972 through December 1973. Processes applied to...
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THE REMOVAL OF TRACE ORGANICS FROM DRINKING WATER USING ACTIVATED CARBON AND POLYMERIC ADSORBENTS |
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A pilot plant was operated at the Kansas City Missouri Water Treatment Plant to study adsorption as a means of removing trihalomethanes and total organic carbon from drinking water...
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THE ROLE OF CHLORINE IN DIOXIN FORMATION |
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There is poor correlation between total chlorine in waste streams and formation of polychlorinated dibenzodioxin and polychlorinated dibenzofuran (PCDD/F) during waste combustion. ...
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THE ROLE OF COAL PROPERTIES AND COMBUSTION CONDITIONS IN THE CAPTURE OF MERCURY BY FLY ASH AND SORBENTS |
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The U. S. fleet of coal-fired power plants, with generating capacity of just over 300 GW, is known to be the major anthropogenic source of domestic mercury (Hg) emissions. As such...
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THE ROLE OF SUBPOPULATION, DISEASE STATE, HOUSING, SEASON AND OTHER FACTORS UPON PERSONAL EXPOSURES TO PM OF AMBIENT ORIGIN |
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A series of longitudinal particulate matter (PM) and related co-pollutant human exposure panel field studies have recently been completed. Studies were conducted in Baltimore, Ma...
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THE SOLUBILITY AND SURFACE CHEMISTRY OF FRESHLY PRECIPITATED COPPER SOLIDS |
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Since the implementation of the United States Environmental Protection Agency’s Lead and Copper Rule (LCR) in 1991, a great deal of research has been
conducted on copper corrosio...
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THE SOLUBILITY OF ACID GASES IN METHANOL |
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The report describes a thermodynamic model developed to predict phase-equilibrium behavior in a methanol/carbon-dioxide/nitrogen/hydrogen-sulfide system based on parameters determi...
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THE TREATMENT OF CONTAMINATED WATER AT REMEDIAL WOOD PRESERVING SITES |
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Contaminated groundwater and surface water have posed a great challenge in restoring wood preserving sites to beneficial use. Often contaminated groundwater plumes extend far beyon...
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THE USE OF CATIONIC SURFACTANTS TO MODIFY AQUIFER MATERIALS TO REDUCE THE MOBILITY OF HYDROPHOBIC ORGANIC COMPOUNDS |
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Cationic surfactants can be used to modify surfaces of soils and subsurface materials to promote sorption of hydrophobic organic compounds (HOC) and retard their migration. For exa...
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THE USE OF MICROBIAL INDICATORS FOR MONITORING STREAM SANITARY AND ECOLOGICAL CONDITION |
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We measured traditional public health indicators of sanitary condition, including heterotrophic plate counts, total coliforms, fecal coliforms, and E. coli using membrane filtratio...
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THE USEFULNESS OF SCALE ANALYSIS: EXAMPLES FROM EASTERN MASSACHUSETTS |
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Many water system managers and operators are curious about the value of analyzing the scales of drinking water pipes. Approximately 20 sections of lead service lines were removed ...
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THERMAL DESORPTION OF PETROLEUM CONTAMINATED SOILS |
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The U.S. Environmental Protection Agency recently funded a study which addresses the treatment of soils contaminated by petroleum hydrocarbons using low temperature thermal desorpt...
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THERMAL DESORPTION TREATMENT |
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Thermal desorption is an ex situ means to physically separate volatile and some semivolatile contaminants from soil, sediments, sludges, and filter cakes. or wastes containing up t...
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THERMAL DESORPTION...NOW YOU'RE COOKIN' |
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Thermal desorption includes a number of ex situ processes that use either direct or indirect heat exchange to heat a waste material to volatilize organic materials. hermal desorpti...
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THERMAL REGENERATION OF ACTIVATED CARBON |
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Ecologically, petrochemical wastes constitute a major hazard since waste materials contain relatively large amounts of non-biodegradable and toxic materials which may be discharged...
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THERMODYNAMIC REACTION CONSTANTS FOR MODELING AQUEOUS ENVIRONMENTAL MERCURY SPECIATION |
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Unacceptably high fish tissue mercury residues are responsible for the majority of fish consumption advisories issued in 48 states of the United States of America. Mercury also ha...
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TIME DEPENDENT INCREASE IN ALBEOLAR MACROPHAGE PHAGOCYTOSIS FOLLOWING INCUBATION WITH CARBON BASED PARTICLES |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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TIME SERIES MODEL FOR CIGARETTE SMOKING ACTIVITY PATTERNS: MODEL VALIDATION FOR CARBON MONOXIDE AND RESPIRABLE PARTICLES IN A CHAMBER AND AN AUTOMOBILE |
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Human activity pattern-exposure models require accurate submodels for the exposures in microenvironments that people occupy, including those containing environmental tobacco smoke ...
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TOTAL ORGANIC CARBON ANALYZERS AS TOOLS FOR MEASURING CARBONACEOUS MATTER IN NATURAL WATERS |
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For some utilities, new US drinking water regulations may require removal of disinfection byproduct (DBP) precursor material as a means of mimnimizing DBP formation. The EPa's Stag...
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TOTAL ORGANIC CARBON DETERMINATIONS IN NATURAL AND CONTAMINATED AQUIFER MATERIALS |
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Quantifying the total organic carbon (TOC) content of soils and aquifer materials is essential for understanding subsurface chemistry during environmental site characterization. on...
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TOTAL ORGANIC CARBON IN LAKE SUPERIOR SEDIMENTS: COMPARISONS WITH HEMIPELAGIC AND PELAGIC MARINE ENVIRONMENTS |
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Seventeen box cores from Lake Superior were analyzed for total organic carbon (TOC), porosity, and (210)Pb activity. The data were used to determine relationships among bulk sedime...
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TOTAL ORGANIC HALIDE MEASUREMENTS |
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Currently, the most popular method of analyzing total dissolved halide in water involves carbon adsorption, oxidative combustion, and measurement of the hydrogen halide by microcou...
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TOTAL PAH EXPOSURES OF NINE PRESCHOOL CHILDREN |
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This study evaluates the influence of denuder sampling methods and filter collection media on the measurement of semi-volatile organic carbon (SVOC) associated with PM2.5. Two t...
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TOWARD ERROR ANALYSIS OF LARGE-SCALE FOREST CARBON BUDGETS |
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Quantification of forest carbon sources and sinks is an important part of national inventories of net greenhouse gas emissions. Several such forest carbon budgets have been constru...
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TOWARDS A STANDARD METHOD FOR THE MEASUREMENT OF ORGANIC CARBON IN SEDIMENTS |
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The precisions achieved by two different methods for analysis of organic carbon in soils and sediments were determined and compared.The first method is a rapid dichromate oxidation...
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TOX (TOTAL ORGANIC HALOGEN), IS IT THE NON-SPECIFIC PARAMETER OF THE FUTURE |
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A total organic halogen (TOX) analysis directly measures halogen (Cl, Br, I) covalently bound to organic molecules in a sample. Currently, the most popular method for TOX in water ...
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TOXAPHENE IN THE GREAT LAKES. (R825246) |
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This paper presents the most current data for toxaphene in the water, sediments, and biota of the Laurentian Great Lakes of North America. Concentrations in water range from 1.1...
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TOXIC INTERACTIONS BETWEEN CARBON TETRACHLORIDE AND CHLOROFORM IN CULTURED RAT HEPATOCYTES |
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Primary cultures of adult rat hepatocytes were incubated (1.5-16 hr) with various concentrations of CC14 (<0.5 mM) and/or CHCl3 (<2.5 mM). gent dependent alterations in hepatocyte ...
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TOXIC SUBSTANCE REMOVAL IN ACTIVATED SLUDGE AND PAC (POWDERED ACTIVATED CARBON) TREATMENT SYSTEMS |
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The effectiveness of adding powdered activated carbon to activated sludge systems was evaluated for enhanced removal of specific toxic organic compounds. Nine organic compounds enc...
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TOXICITY AND METABOLISM STUDIES WITH EPA (ENVIRONMENTAL PROTECTION AGENCY) PRIORITY POLLUTANTS AND RELATED CHEMICALS IN FRESHWATER ORGANISMS |
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Twenty-two chemicals from the EPA priority pollutant list were studied for their acute and/or chronic toxicity to selected freshwater organisms. Freshwater species tested included ...
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TOXICITY OF FLUORANTHENE IN SEDIMENT TO MARINE AMPHIPODS: A TEST OF THE EQUILIBRIUM PARTIONING APPROACH TO SEDIMENT QUALITY CRITERIA |
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The toxicity of fluoranthene in sediment to the marine benthic amphipods, Rhepoxynius abronius (Barnard) and Corophium spinicorne (Stimpson) was determined in relation to the equil...
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TOXICITY REDUCTION THROUGH CHEMICAL AND BIOLOGICAL MODIFICATION OF SPENT PULP BLEACHING LIQUORS |
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Chlorophenols similar to or identical with those detected in spent chlorination and caustic extraction liquors were synthesized and tested over a range of concentrations to determi...
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TOXICOLOGICAL DATA ON SELECTED HAZARDOUS CHEMICALS AND POSSIBLE EXTRAPOLATION TO MAN |
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The experimental evidence that chemicals commonly found in drinking water possess carcinogenic properties is reviewed. Three types of sources for chemicals in drinking water are ex...
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TOXICOLOGY OF NATURAL AND MAN-MADE TOXICANTS IN DRINKING WATER |
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Drinking Water obtained from surface sources contains a very large variety of organic chemicals. The total organic carbon present in the source water is made up of both natural and...
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TRACE ANALYSIS FOR AROMATIC HYDROCARBONS IN NATURAL WATERS |
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A method of trace analysis of volatile aromatic hydrocarbons in natural water is described. The method is based on sparging water samples with nitrogen, adsorption of hydrocarbons ...
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TRACE ELEMENT RESEARCH USING CONIFEROUS FOREST SOIL/LITTER MICROCOSMS |
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Respirometers have been designed, constructed and to a limited extent, tested to maintain and measure production and/or consumption of biogenic heat and carbon dioxide production a...
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TRACE GAS CONCENTRATIONS IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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Seventeen headwater watersheds within the SFBR watershed ranging from 0.5 to 3.4 km2 were selected. We have been monitoring concentrations of the trace gases nitrous oxide, methane...
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TRACE GAS CONCENTRATIONS IN STREAMS - EARLY WARNING INDICATORS OF STREAM IMPAIRMENT? |
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Surface water contamination and resultant impairment of aquatic ecosystem functioning are serious environmental problems, caused in large part by land use changes and excess organi...
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TRACE ORGANICS REMOVAL USING ACTIVATED CARBON AND POLYMERIC ADSORBENTS |
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A survey of trace organic matter in 14 water supplies was conducted and an investigation was made to compare the effectiveness of granular activated carbon with polymeric adsorbent...
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TRACE ORGANICS VARIATION ACROSS THE WASTEWATER TREATMENT SYSTEM OF A CLASS-B REFINERY AND ESTIMATE OF REMOVAL OF REFRACTORY ORGANICS BY ADD-ON MIXED-MEDIA FILTRATION AND GRANULAR ACTIVATED CARBON AT PILOT SCALE |
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This report presents the results of research to evaluate the efficiency of pilot-scale granular activated carbon for the removal of organic compounds refractory to the activated-sl...
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TRACKING THE EMISSION OF CARBON DIOXIDE BY NATION, SECTOR, AND FUEL TYPE: A TRACE GAS ACCOUNTING SYSTEM (TGAS) |
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The paper describes a new way to estimate an efficient econometric model of global emissions of carbon dioxide (CO2) by nation, sector, and fuel type. quations for fuel intensity a...
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TRANSFER OF ARSENITE FROM GLUTATHIONE TO DITHIOLS : A MODEL OF INTERACTION |
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The interactions of arsenate and arsenite with MESO-2,3 mercaptosuccinic acid (DMSA) have been characterized using carbon-13 nuclear magnetic resonance. hese studies show that DMSA...
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TRANSFORMATION OF CARBON TETRACHLORIDE BY PYRITE IN AQUEOUS SOLUTION |
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The reactivity of CCl4 with pyrite was investigated by measuring the CCl4 transformation rates and products under aerobic and anaerobic conditions. nder all reaction conditions, >9...
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TRANSFORMATION OF CARBON TETRACHLORIDE BY REDUCED VITAMIN B12 IN AQUEOUS CYSTEINE SOLUTION. (R825689C073) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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TRANSGENERATIONAL EFFECTS OF A JUVENILE HORMONE MIMIC ON THE ESTUARINE MYSID, MYSIDOPSIS BAHIA (CRUSTACEA: MYSIDACEA) |
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Fenoxycarb is a juvenile hormone (JH) mimic used to control insect pests by interfering with reproductive and developmental processes mediated by JH. Crustaceans are ideal organism...
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TRANSPIRATION EFFECT ON THE UPTAKE AND DISTRIBUTION OF BROMACIL, NITROBENZENE, AND PHENOL IN SOYBEAN PLANTS (JOURNAL VERSION) |
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The influence of transpiration rate on the uptake and translocation of two industrial waste compounds, phenol and nitrobenzene, and one pesticide, 5-bromo-3-sec-butyl-6-methyluraci...
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TRANSPORT AND FATE OF DIETHYL PHTHALATE IN AQUATIC ECOSYSTEMS |
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Sorption, alkaline hydrolysis, photolysis and microbial transformation of diethyl phthalate (DEP) were studied in a large laboratory aquatic ecosystem composed of a series of react...
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TRANSPORT OF DISSOLVED ORGANIC CARBON-DERIVED NATURAL COLLOIDS FROM BED SEDIMENTS TO OVERLYING WATER: LABORATORY SIMULATIONS. (R825513C008) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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TRANSPORT OF DISSOLVED ORGANIC CARBON-DERIVED NATURAL COLLOIDS FROM BED SEDIMENTS TO OVERLYING WATER: LABORATORY SIMULATIONS. (R825513C009) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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TRANSPORT PROCESSES INVOLVING ORGANIC CHEMICALS |
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Groundwater use in the USA has more than doubled between 1950 and 1975, and more than 40% of the USA population utilizes groundwater as a drinking water source. hese figures, coupl...
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TRANSPORTATION FUEL FROM CELLULOSIC BIOMASS: A COMPARATIVE ASSESSMENT OF ETHANOL AND METHANOL OPTIONS |
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Future sources of renewable fuel energy will be needed to supplement or displace petroleum. Biomass can be converted to ethanol or methanol, either having good properties as motor...
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TREATABILITY OF CARCINOGENIC AND OTHER HAZARDOUS ORGANIC COMPOUNDS |
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This research program was conducted to determine the capability of biological and physical-chemical treatment processes to remove chemical carcinogens and other hazardous organic c...
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TREATABILITY OF PHTHALATE ESTER COMPOUNDS FROM PLASTICS MOLDING AND FORMING WASTEWATERS |
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The objective of the project was to evaluate methods of removing phthalates from a plastics molding and forming contact cooling and heating water. Two technologies were evaluated: ...
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TREATABILITY STUDIES OF PESTICIDE MANUFACTURING WASTEWATERS: DINOSEB AND ATRAZINE |
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The report gives results of laboratory and pilot studies of the treatability of pesticide manufacturing wastewaters, in an investigation of the suitability of individual pesticide ...
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TREATMENT ALTERNATIVES FOR CONTROLLING CHLORINATED ORGANIC CONTAMINANTS IN DRINKING WATER |
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A pilot plant study was conducted by the City of Thornton, Colorado, to evaluate techniques for controlling chlorinated organic compounds formed in drinking water as a result of br...
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TREATMENT AND DISPOSAL OF COMPLEX INDUSTRIAL WASTES |
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The waste effluent from operation of the Tuscaloosa, Alabama, plant of Reichhold Chemicals, Inc., results from both batch and continuous operations, contains both organic and inorg...
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TREATMENT AND PCP CONTAINING WASTEWATER USING ANAEROBIC FLUIDIZED-BED GAC BIOREACTORS |
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This study evaluates the use of two anaerobic fluidized-bed granular activated carbon (GAC) bioreactors for treating pentachlorophenol (PCP), one of the major toxic compounds found...
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TREATMENT AND SOLIDS MANAGEMENT |
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A variety of high-rate treatment methods show a potential to handle WWF including: physical separation with and without chemical addition (e.g., enhanced settling, fine-mesh screen...
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TREATMENT EFFECTIVENESS: OIL TANKER BALLAST WATER FACILITY |
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A study dealing with the effectiveness of large-scale treatment of ballast water was conducted at the terminal facility of the TransAlaska Pipeline in Valdez, Alaska. The plant was...
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TREATMENT OF AQUEOUS METAL AND CYANIDE BEARING HAZARDOUS WASTES |
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With the reauthorization of the Resource Conservation and Recovery Act (RCRA) and the concurrent restrictions on land disposal of hazardous wastes, the U.S. Environmental Protectio...
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TREATMENT OF CERCLA (COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND LIABILITY ACT) LEACHATES BY CARBON-ASSISTED ANAEROBIC FLUIDIZED BEDS |
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Two anaerobic granular activated carbon (GAC) expanded-bed bioreactors were tested as pretreatment units for the decontamination of hazardous leachates containing volatile and semi...
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TREATMENT OF DRINKING WATER BY BROMIDE ADDITION AND POWDERED ACTIVATED CARBON ADSORPTION |
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Although the phenomenon of the formation of trihalomethanes during the disinfection of drinking water with free chlorine has been known for over ten years, water utilities are stil...
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TREATMENT OF DRINKING WATER CONTAINING TRICHLOROETHYLENE AND RELATED INDUSTRIAL SOLVENTS |
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Volatile chlorinated and non-chlorinated compounds occur in both untreated and treated drinking water. Because volatilization is restricted, ground waters rather than surface water...
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TREATMENT OF HAZARDOUS LANDFILL LEACHATES AND CONTAMINATED GROUNDWATER |
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The objectives of the Cooperative Agreement were to assess the actual application of separate or combined biological and physical/chemical treatment techniques to high-strength haz...
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TREATMENT OF MTBE-CONTAMINATED WATERS WITH FENTON'S REAGENT |
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Methyl tertiary-butyl ether (MTBE) has been commonly used as a fuel additive because of its many favorable properties that allow it to improve fuel combustion and reduce resultin...
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TREATMENT OF ORGANIC CHEMICAL MANUFACTURING WASTEWATER FOR REUSE |
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This research demonstrated the quality of water produced by each step of a state-of-the-art, commercially available process sequence and determined the feasibility and economics of...
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TREATMENT OF PCP CONTAINING WASTEWATER USING ANAEROBIC FLUIDIZED BED GAC BIOREACTORS |
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This study evaluates the use of two anaerobic fluidized-bed granular activated carbon (GAC) bioreactors for treating pentachlorophenol (PCP), one of the major toxic compounds found...
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TREATMENT OF PETROLEUM REFINERY, PETROCHEMICAL AND COMBINED INDUSTRIAL-MUNICIPAL WASTEWATERS WITH ACTIVATED CARBON - LITERATURE REVIEW |
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A review of the literature on activated carbon adsorption as a treatment concept for petroleum refinery, petrochemical plant, and combined industrial-municipal wastewaters is prese...
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TREATMENT OF REFINERY WASTEWATER USING A FILTRATION-ACTIVATED CARBON SYSTEM |
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The objective of this report was to demonstrate the applicability of a dual media filtration-activated carbon adsorption system for the treatment of petroleum refinery wastewater. ...
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TREATMENT OF SEASONAL PESTICIDES IN SURFACE WATERS |
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Numerous pesticides were monitored in surface waters in agricultural areas. Atrazine, alachlor, metolachlor, cyanazine, metribuzin, carbofuran, linuron, and simazine were found in ...
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TREATMENT OF SEMIVOLATILE COMPOUNDS IN HIGH STRENGTH WASTES USING AN ANAEROBIC EXPANDED-BED GAC REACTOR |
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The potential of the anaerobic, expanded-bed, granular activated carbon (GAC) reactor in treating a high strength waste containing RCRA semivolatile organic compounds (VOCS) was st...
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TREATMENT OF VOCS IN HIGH STRENGTH WASTES USING AN ANAEROBIC EXPANDED-BED GAC REACTOR |
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The potential of the expanded-bed granular activated carbon (GAC) anaerobic reactor in treating a high strength waste containing RCRA volatile organic compounds (VOC's) was studied...
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TREATMENT OF VOLATILE ORGANIC COMPOUNDS IN DRINKING WATER |
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Volatile chlorinated and non-chlorinated compounds occur in both untreated and treated drinking water. Because volatilization is restricted, ground waters rather than surface water...
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TREATMENT OF WATER FROM CONTAMINATED WELLS |
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The recently enacted Safe Drinking Water Act Amendments dictates the regulation of 83 contaminants within the next three years and at least 25 more by 1991. The paper describes the...
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TREATMENT STUDIES OF CCL CONTAMINANTS |
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Bench-scale screening-level treatment data are presented for compounds listed in the Contaminant Candidate List (CCL). All of the CCl compounds are predicted to be economically rem...
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TREATMENT TECHNOLOGIES FOR HAZARDOUS WASTES. PART 3. TREATMENT TECHNOLOGIES FOR CORROSIVE HAZARDOUS WASTES |
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In the paper, the authors present generation and treatment information for corrosive hazardous wastes (EPA Hazardous Waste Codes D002 and K062). The authors discuss the state of th...
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TREATMENT TECHNOLOGY FOR PESTICIDE MANUFACTURING EFFLUENTS: ATRAZINE, MANEB, MSMA, AND ORYZALIN |
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The report gives results of laboratory and pilot studies of the treatability of wastewaters generated by the manufacture of the pesticides maneb, oryzalin, atrazine, and MSMA. Wast...
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TREATMENT TECHNOLOGY FOR REMEDIATION OF WOOD PRESERVING SITES: OVERVIEW |
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This is the first in a series of five articles describing the applicability, performance and cost of technologies for the remediation of contaminated soil and water at wood preserv...
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TREATMENT TECHNOLOGY FOR REMOVING RADON FROM SMALL COMMUNITY WATER SUPPLIES |
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Radon contamination of drinking water primarily affects individual homeowners and communities using groundwater supplies. resently, three types of treatment processes have been use...
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TREATMENT TECHNOLOGY TO MEET THE INTERIM PRIMARY DRINKING WATER REGULATIONS FOR INORGANICS, PART 3. CADMIUM, LEAD, AND SILVER |
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EPA established drinking water regulations for ten inorganic substances and radionuclides that became effective on June 24, 1977. As a result of these new regulations, many communi...
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TREATMENT TECHNOLOGY TO MEET THE INTERIM PRIMARY DRINKING WATER REGULATIONS FOR INORGANICS: PART 4 |
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EPA established drinking water regulations for ten inorganic substances and radionuclides that became effective on June 24, 1977. As a result of these new regulations, many communi...
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TREATMENT TECHNOLOGY TO MEET THE INTERIM PRIMARY DRINKING WATER REGULATIONS, PART 2. ARSENIC AND SELENIUM |
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EPA established drinking water regulations for ten inorganic substances and radionuclides that became effective on June 24, 1977. As a result of these new regulations, many communi...
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TRENDS OF IN-VEHICLE CO EXPOSURES ON A CALIFORNIA ARTERIAL HIGHWAY OVER ONE DECADE |
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In 1990-81, carbon monoxide (CO) exposures were measured inside a motor vehicle during 88 standardized drives on a California urban arterial highway, El Camino Real (traffic volume...
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TRIAL BURN RESULTS AND FUTURE ACTIVITIES OF THE EPA MOBILE INCINERATOR |
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The EPA Mobile Incinerator has demonstrated its ability to successfully destroy dioxin. rial burn conducted in 1987 demonstrated the incinerator's ability to destroy a wide variety...
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TRICHLOROETHYLENE ADSORPTION BY ACTIVATED CARBON PRELOADED WITH HUMIC SUBSTANCES: EFFECTS OF SOLUTION CHEMISTRY. (R828157) |
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AbstractTrichloroethylene (TCE) adsorption by activated carbon previously loaded ("preloaded") with humic substances was found to decrease with increasing conce...
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TRICHLOROETHYLENE REMOVAL FROM GROUNDWATER IN FLOW-THROUGH COLUMNS SIMULATING A PERMEABLE REACTIVE BARRIER CONSTRUCTED WITH PLANT MULCH |
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Ground water contaminated with TCE is commonly treated with a passive reactive barrier (PRB) constructed with zero-valence iron. The cost of iron as the reactive matrix has driven...
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TRIHALOMETHANE PRECURSOR REMOVAL BY COAGULATION TECHNIQUES IN A LIME-SOFTENING PLANT (A THREE-PHASED STUDY) |
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A research program identified and evaluated a treatment scheme that reduced trihalomethane (THM) concentrations formed in the treatment process by coagulating the THM precursor mat...
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TRIHALOMETHANE PRECURSOR REMOVAL BY THE MAGNESIUM CARBONATE PROCESS |
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A project was conducted to determine and improve the ability of the magnesium carbonate process to remove trihalomethane (THM) precursors in treated drinking water. The project was...
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TROPHIC STRUCTURE MODIFICATIONS BY PLANKTIVOROUS FISH IN AQUATIC MICROCOSMS |
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Two of 4 replicate 700-liter aquatic microcosms each were stocked with 2 mosquito fish (Gambusia affinis). The dominant zooplankter shifted from the large cladoceran Simocephalus v...
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TROPICAL FORESTS AND THE GLOBAL CARBON CYCLE: ESTIMATING STATE AND CHANGE IN BIOMASS |
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NO ABSTRACT PROVIDED...
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TROPICAL MEXICO'S RECENT LAND-USE CHANGE: A REGION'S CONTRIBUTION TO THE GLOBAL CARBON CYCLE |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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TRUCK WASHING TERMINAL WATER POLLUTION CONTROL |
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A laboratory and pilot-scale investigation of a treatment sequence, including physical, chemical, and biological treatment steps led to a full-scale installation for the treatment ...
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TUNNEL MEASUREMENT OF THE PAH (POLYCYCLIC AROMATIC HYDROCARBON), CARBON THERMOGRAM AND ELEMENTAL SOURCE SIGNATURE FOR VEHICULAR EXHAUST |
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To obtain a vehicular signature suitable for source apportionment of carbonaceous aerosols, submicron particulate emissions were sampled from inside the air duct of a 1.1 km freewa...
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TURBULENT FLAME REACTOR STUDIES OF CHLORINATED HYDROCARBON DESTRUCTION EFFICIENCY |
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Four mixtures of C1 and C2 chlorinated hydrocarbons, diluted in heptane, were burned in a Turbulent Flame Reactor (TFR) under high and low oxygen conditions. ...
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TURBULENT FLAME REACTOR STUDIES OF CHLORINATED HYDROCARBON DESTRUCTION EFFICIENCY |
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Four mixtures of C1 and C2 chlorinated hydrocarbons, diluted in heptane, were burned in a Turbulent Flame Reactor (TFR) under high and low oxygen conditions. missions of undestroye...
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TWO-STAGE BIOLOGICAL TREATMENT OF COKE PLANT WASTEWATER |
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The report documents a pilot-plant study of the use of advanced waste treatment methods in upgrading metallurgical cokemaking wastewaters to Best Available Technology (BAT) levels....
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TWO-STAGE GRANULAR ACTIVATED CARBON TREATMENT |
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Two 6.3 l/sec (0.15 mgd), two-stage, packed-bed, downflow granular activated carbon pilot plants were operated continuously for 33 months using unfiltered and unchlorinated activat...
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TYROSINASE-BASED CARBON PASTE ELECTRODE BIOSENSOR FOR DETECTION OF PHENOLS: BINDER AND PRE-OXIDATION EFFECTS |
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Tyrosinase-based carbon paste electrodes are evaluated with respect to the viscosity and polarity of the binder liquids. The electrodes constructed using a lower viscosity miner...
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Tech Brief - Detecting Contamination Events in Multi-Parameter Water Monitors for Distribution Systems |
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TECH BRIEF - Five Water Monitoring Sensors Evaluated for Detecting Contamination Events --
In the past, people in the United States have largely taken
for granted the convenience...
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The Effect of Environmental Chemicals on Human Health -- CJA |
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Humans and animals have always been exposed to chemicals in our environment - natural products in foods, smoke from cooking fires, sewage in drinking water, pesticides from plants....
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The Occurrence of Contaminant Accumulation in Lead Pipe Scales from Domestic Drinking Water Distribution Systems-ABSTRACT |
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Previous work has shown that contaminants such as Al, As and Ra, can accumulate in drinking water distribution system solids. The release of accumulated contaminants back into the ...
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The Reduction of Microbial and Chemical Contaminants with Selected POU/POE Systems |
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Centralized drinking water treatment and distribution alone may not always be the most practical or cost-effective option. Also, some consumers seeking a proactive measure to redu...
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The dark side of suibsidies: quantifying contaminant exposure to riparian predators via stream insects |
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Aquatic insects provide a critical nutrient subsidy to riparian food webs, yet their role as vectors of contaminants to terrestrial ecosystems is poorly understood. We investigated...
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Top-down control of phytoplankton by oysters in Chesapeake Bay, USA: Comment on Pomeroy et al. (2006) |
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Pomeroy et al. (2006) proposed that temporal and spatial mismatches between eastern oyster filtration and phytoplankton abundance will preclude restored stocks of eastern oysters f...
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Trading forest carbon |
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The nature of carbon in forests is discussed from the perspective of carbon trading. Carbon inventories, specifically in the area of land use and forestry are reviewed for the Paci...
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Treatment of semivolatile compounds in high strength wastes using an anaerobic expanded-bed GAC reactor |
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The potential of the anaerobic, expanded bed granular activated carbon (GAC) reactor in treating a high strength waste containing RCRA semivolatile organic compounds (VOCs) was stu...
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U.S. COAL USE: THE ENVIRONMENTAL CHALLENGE |
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Although the paper focuses on past (since 1920) and current coal use and pollutant emissions in the U.S., it also discusses where the U.S. may be going in terms of pollutant emissi...
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U.S. ENVIRONMENTAL PROTECTION AGENCY'S EVALUATION OF EARLY WARNING SENSORS AND MONITORS FOR DISTRIBUTION |
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Since the terrorist attacks on the United States on September 11, 2001, the safety and security of the United States drinking water distribution systems has been reassessed. Severa...
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U.S. EPA PERSPECTIVE ON AOC RESEARCH AS RELATED TO COLIFORM COLONIZATION AND COMPLIANCE PROBLEMS |
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The biological stability of treated drinking water has become a major concern for water utilities. he U.S. E.P.A. is concerned from the perspective of coliform compliance and remed...
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U.S. EPA'S EVALUATION OF A TEXACO GASIFICATION TECHNOLOGY |
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Gasification technologies are designed to produce, from carbonaceous organic materials (e.g., coal, oil), a useable mixture of carbon monoxide and hydrogen called synthesis gas, or...
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U.S.-MEXICO BORDER PROGRAM ARIZONA BORDER STUDY--STANDARD OPERATING PROCEDURE FOR ANALYSIS OF THREE-PHASE MULTISORBENT SAMPLERS FOR VOLATILE ORGANIC COMPOUNDS (BCO-L-22.1) |
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The purpose of this SOP is to describe the methodology for the analysis of certain trace volatile organic compounds (VOCs) in air that are captured on carbon-based multisorbent tub...
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U.S.-MEXICO BORDER PROGRAM ARIZONA BORDER STUDY--STANDARD OPERATING PROCEDURE FOR ANALYSIS OF TWO-PHASE MULTISORBENT SAMPLERS FOR VOLATILE ORGANIC COMPOUNDS (BCO-L-31.0) |
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The purpose of this SOP is to describe the methodology for the analysis of certain trace volatile organic compounds (VOCs) in air that are captured on two-phase carbon-based multis...
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U.S.-MEXICO BORDER PROGRAM ARIZONA BORDER STUDY--STANDARD OPERATING PROCEDURE FOR PREPARATION OF MULTISORBENT TUBES FOR ACTIVELY-PUMPED VOC SAMPLERS (BCO-L-18.1) |
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The purpose of this SOP is to describe the procedures followed in the preparation of carbon-based multisorbent tubes for the collection of volatile organic compounds (VOCs) in air ...
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ULTRAFINE ASH AEROSOLS FROM COAL COMBUSTION: CHARACTERIZATION AND HEALTH EFFECTS |
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Ultrafine coal fly ash particles, defined here as those with diameters less than 0.5 micrometer, typically comprise less than 1% of the total fly ash mass. These particles are form...
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ULTRAFINE CARBON PARTICLE (UFCP) INHALATION AFFECTS CARDIOVASCULAR PERFORMANCE IN HYPERTENSIVE RATS (SHR) |
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Inhaled UfCP affect cardiovascular performance in healthy rats (Harder et al. Inhal Toxicol 2005; 17:29-42) without apparent pulmonary damage. To assess whether geriatric cardiovas...
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ULTRAFINE CARBON PARTICLES INDUCE IL-8 EXPRESSION IN HUMAN AIRWAY EPITHELIAL CELLS THROUGH A POST-TRANSCRIPTIONAL MECHANISM |
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Ultrafine carbon particles induce IL-8 expression in human airway
epithelial cells through a post-transcritpional mechanism
Epidemiological studies suggest that ultrafine pa...
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ULTRAFINE CARBON PARTICLES INDUCE INTERLEUKIN-8 GENE TRANSCRIPTION AND P38 MAPK ACTIVATION IN NORMAL BRONCHIAL EPITHELIAL CELLS |
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Epidemiological studies suggest that ultrafine particles contribute to particulate matter-induced adverse health effects. Interleukin (IL)-8 is an important proinflammatory cytokin...
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ULTRAFINE PARTICLE DEPOSITION IN HEALTHY SUBJECTS VS. PATIENTS WTH COPD |
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Individuals affected with chronic obstructive pulmonary disease (COPD) have increased susceptibility to adverse health effects from exposure to particulate air pollution. The do...
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ULTRASOUND PRETREATMENT OF ELEMENTAL IRON: KINETIC STUDIES OF DEHALOGENATION REACTION ENHANCEMENT AND SURFACE EFFECTS. (R828598C743) |
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This work presents data showing the kinetic improvement afforded by ultrasound pretreatment and illustrates the physical and chemical changes that take place at the iron surface...
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ULTRASOUND-ASSISTED ORGANIC SYNTHESIS: ALCOHOL OXIDATION AND OLEFIN EPOXIDATION |
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Ultrasound-assisted Organic Synthesis: Alcohol Oxidation and Olefin Epoxidation
Unnikrishnan R Pillai, Endalkachew Sahle-Demessie , Vasudevan Namboodiri, Quiming Zhao, Julu...
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ULTRAVIOLET RADIATION DOSE AND AMPHIBIAN DISTRIBUTIONS IN NATIONAL PARKS |
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Ultraviolet Radiation Dose and Amphibian Distributions in National Parks. Diamond, S. A., Detenbeck, N. E., USEPA, Duluth, MN, USA, Bradford, D. F., USEPA, Las Vegas, NV, USA, Tren...
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ULTRAVIOLET-B RADIATION EFFECTS ON INORGANIC NITROGEN UPTAKE BY NATURAL ASSEMBLAGES OF OCEANIC PLANKTON |
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Ultraviolet-B radiation (UVBR: 290-320 nm) inhibited ammonium uptake (PNH4) and nitrate uptake (PNO4) in natural plankton assemblages collected during a transect from 37 degrees N ...
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UNCERTAINTIES IN COUNTRYWIDE FOREST BIOMASS ESTIMATES |
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Country-wide estimates of forest biomass are the major driver for estimating and understanding carbon pools and flux, a critical component of global change research. mportant deter...
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UNCERTAINTY IN SOURCE PARTITIONING USING STABLE ISOTOPES |
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Stable isotope analyses are often used to quantify the contribution of multiple sources to a mixture, such as proportions of food sources in an animal's diet, C3 vs. C4 plant input...
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UNDERSTANDING ECOSYSTEM RESPONSE TO OZONE STRESS |
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Ecological risk assessment of ozone impact requires consideration of many factors that, perhaps, are not of concern in human health risk assessment. The episodic nature of ozone e...
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UNDERSTANDING PCDD/F FORMATION AND SOURCES |
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Recent work at the U. S. EPA has examined fundamental concepts regarding formation and minimization of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/Fs) in combustion ...
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UNDERSTANDING SYSTEMATIC MEASUREMENT ERROR IN THERMAL-OPTICAL ANALYSIS FOR PM BLACK CARBON USING RESPONSE SURFACES AND SURFACE CONFIDENCE INTERVALS |
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Results from a NIST-EPA Interagency Agreement on Understanding Systematic Measurement Error in Thermal-Optical Analysis for PM Black Carbon Using Response Surfaces and Surface Conf...
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UNDERSTANDING THE ROLE OF OZONE STRESS IN ALTERING BELOWGROUND PROCESSES |
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Forested ecosystems are comprised of tremendous biological diversity and functional complexity both above and belowground. Soil ecosystems are known to contain thousands of specie...
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UNIFIED APPROACH TO PORE SIZE CHARACTERIZATION OF MICROPOROUS CARBONACEOUS MATERIALS FROM NITROGEN, ARGON AND CARBON DIOXIDE ADSORPTION ISOTHERMS. (R825959) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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UNVENTED KEROSENE HEATER EMISSIONS FROM MOBILE HOMES: STUDIES ON INDOOR AIR PARTICLES, SEMI-VOLATILE ORGANICS, CARBON MONOXIDE AND MUTAGENICITY |
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This study was conducted to assess human exposure to air pollutants resulting from the use of kerosene heaters in mobile homes. t has been estimated that 15-17 million unvented ker...
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UNVENTED KEROSENE HEATER EMISSIONS FROM MOBILE HOMES: STUDIES ONINDOOR AIR PARTICLES, SEMI-VOLATILE ORGANICS, CARBON MONOXIDE, ANDMUTAGENICITY |
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This study was conducted to assess human exposure to air pollutantsresulting from the use of kerosene heaters in mobile homes. t hasbeen estimated that 15-17 million unvented keros...
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UPDATE OF EPA'S EMISSION FACTORS FOR LANDFILL GAS EMISSIONS |
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The paper describes an effort to collect updated data and determine if changes are needed to AP-42, a document that provides emission factors characterizing landfill gas (LFG) emis...
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UPDATED HEALTH EFFECTS ASSESSMENT FOR CARBON TETRACHLORIDE |
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This report summarizes and evaluates information relevant to a preliminary interim assessment of adverse health effects associated with specific chemicals or compounds. The Office ...
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UPPER GREAT LAKES CONNECTING CHANNELS STUDY: DETROIT RIVER SYSTEM MASS BALANCE (UGLCCS ACTIVITIES C.1 AND F.4) |
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The report describes results of a study of water quality budgets in the Lake St. Clair - Detroit River system. In two water quality surveys profiles of contaminants and other chemi...
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UPPER MISSOURI RIVER ENVIRONMENTAL MONITORING AND ASSESSMENT PROGRAM (EMAP-UMR): 2000 PILOT STUDY FINDINGS AND FURTHER DIRECTION |
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The EPA Office of Research and Development's Mid-Continent Ecology Division has undertaken an EMAP study to assess the condition of selected resources of the Upper Missouri River m...
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URBAN AEROSOL MODELING: INCORPORATION OF AN SO2 PHOTOCHEMICAL OXIDATION MODULE IN AROSOL |
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Modules for the conversion of sulfate has been included in the urban scale K-theory particulate model, AROSOL. Two modules are included: one is an empirical first order SO2 convers...
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URBAN AEROSOL TRANSFORMATION AND TRANSPORT MODELING |
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Modules for secondary aerosol formation have been included in the urban scale K-theory aerosol model, AR0S0L. hese are: (1) An empirical first-order 502 conversion scheme due to Me...
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URBAN SCALE VARIABILITY OF PM 2.5 COMPONENTS |
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This study is being conducted in a large city in the mid-west U.S. The preliminary spatial analyses for particulate nitrate, selected trace elements, and organic and elemental carb...
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US EPA WINTER FLOUNDER PROJECTS AND OTHER WORK IN RHODE ISLAND SALT PONDS |
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We will briefly summarize selected EPA research in Rhode Island's salt ponds from 2000 through 2003. In one project, during the summer of 2000, we used a 1.75 m2 drop sampler to q...
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USE OF ARTIFICIAL WETLANDS TO REMOVE NITROGEN FROM WASTEWATER |
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Studies of artificial wetlands at Santee, California, focused on nitrogen removal from municipal wastewaters using lower-cost alternatives to methanol to supply carbon to drive den...
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USE OF CARBON STABLE ISOTOPE FOR THE DECHLORINATION OF TRICHLOROETHYLENE ON GRANULAR-GRAPHITE PACKED ELECTRODES (PRESENTATION) |
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Trichloroethylene (TCE) is widely used as a solvent in metal processing and electronic manufacturing industries, but waste and spilled TCE often results in blocks of non-aqueous li...
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USE OF CARBON STABLE ISOTOPE TO INVESTIGATE CHLOROMETHANE FORMATION IN THE ELECTROLYTIC DECHLORINATION OF TRICHLOROETHYLENE |
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Carbon stable isotope trichloroethylene (13C TCE) was used to investigate the formation of chloromethane (CM) during the electrolytic dechlorination of trichloroethylene...
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USE OF CATIONIC SURFACTANT TO MODIFY SOIL SURFACES TO PROMOTE SORPTION AND RETARD MIGRATION OF HYDROPHOBIC ORGANIC COMPOUNDS |
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Cationic surfactants can be used to modify surfaces of soils and subsurface materials to promote adsorption of hydrophobic organic compounds (HOC). atch and column experiments were...
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USE OF CATIONIC SURFACTANTS TO MODIFY AQUIFER MATERIALS TO REDUCE THE MOBILITY OF HYDROPHOBIC ORGANIC COMPOUNDS |
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Cationic surfactants can be used to modify surfaces of soils and subsurface materials to promote sorption of hydrophobic organic compounds (HOC) and retard their migration. or exam...
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USE OF COMPETITIVE GENOMIC HYBRIDIZATION TO ENRICH FOR GENOME-SPECIFIC DIFFERENCES BETWEEN TWO CLOSELY RELATED HUMAN FECAL INDICATOR BACTERIA |
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Enterococci are frequently used as indicators of fecal pollution in surface waters. To accelerate the identification of Enterococcus faecalis-specific DNA sequences, we e...
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USE OF COMPOUND-SPECIFIC STABLE CARBON ISOTOPE ANALYSES TO DEMONSTRATE NATURAL BIODEGRADATION OF MTBE IN GROUND WATER AT A GASOLINE RELEASE SITE |
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Methyl tertiary butyl ether (MTBE) has been used as an additive in gasoline to enhance
octane rating and to improve combustion efficiency. It is also a commonly detected contam...
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USE OF COMPUTER-AIDED TOMOGRAPHY SCAN IMAGING AND SOIL RESPIRATION TO ASSESS SALT MARSH CONDITION |
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Platform presentation at a scientific conference...
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USE OF FATTY ACID STABLE CARBON ISOTOPE RATIO TO INDICATE MICROBIAL CARBON SOURCE IN TROPICAL SOILS |
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We use measurements of the concentration and stable carbon isotope ratio of individual microbial phospholipid fatty acids (PLFAs) in soils as indicators of live microbial bio...
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USE OF GC-MS/COMBUSTION/IRMS TO IDENTIFY AND DETERMINE THE STABLE CARBON ISOTOPIC RATIO OF INDIVIDUAL LIPIDS |
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A system that couples a gas chromatograph (GC) via a split to a quadrapole mass spectrometer (MS) and, through a combustion interface, to an isotope ratio mass spectrometer (IRMS) ...
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USE OF GRANULAR GRAPHITE FOR ELECTROLYTIC DECHLORINATION OF TRICHLOROETHYLENE |
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Granular graphite is a potential electrode material for the electrochemical remediation of refractory chlorinated organic compounds such as trichloroethylene (TCE). However, the us...
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USE OF HYDROGEN RESPIROMETRY TO DETERMINE METAL TOXICITY TO SULFATE REDUCING BACTERIA |
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Acid mine drainage (AMD), an acidic metal-bearing wastewater poses a severe pollution problem attributed to post-mining activities. The metals (metal sulfates) encountered in AMD a...
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USE OF LANDSCAPE METRICS TO PRIORITIZE WATERSHEDS FOR ECOLOGICAL RESTORATION IN ARKANSAS WHITE RIVER BASIN |
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Techniques for the broad-scale identification of wetland restoration sites are increasingly being sought for the purposes of improving the functions of wetlands that influence wate...
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USE OF MEMBRANE BIOREACTOR FOR BIODEGRADATION OF MTBE IN CONTAMINATED WATER1 |
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An ultrafiltration membrane bioreactor was evaluated for biodegradation of methyl tert-butyl ether (MTBE) in contaminated water. The system was fed 5 mg/L MTBE in granular a...
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USE OF MOPITT CARBON MONOXIDE TO ASSESS REALLOCATION OF WILDFIRE EMISSIONS IN CMAQ |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact Field....
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USE OF QSPRS IN IMPROVING CARBON ADSORPTION MODELING OF EPA CONTAMINANT CANDIDATE COMPOUNDS |
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Activated carbon adsorption of EPA contaminant candidate list (CCL) compounds is under investigation as a treatment technology for contaminated drinking water. Historically, EPA, ...
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USE OF QSPRS IN IMPROVING CARBON ADSORPTION MODELING OF EPA CONTAMINANT CANDIDATE COMPOUNDS |
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Activated carbon adsorption of EPA contaminant candidate list (CCL) compounds is under investigation as a treatment technology for contaminated drinking water. Historically, EPA, ...
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USE OF RESPIRATORY-CARDIOVASCULAR RESPONSES OF RAINBOW TROUT (SALMO GAIRDNERI) IN IDENTIFYING ACUTE TOXICITY SYNDROMES IN FISH: PART 3. POLAR NARCOTICS |
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The physiological responses of rainbow trout to acutely lethal aqueous concentrations of the suspected polar narcotics phenol, 2,4,-dimethylphenol, aniline, 2-chloroaniline and 4-c...
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USE OF SEDIMENT CORES TO ESTABLISH REFERENCE CONDITIONS |
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In order to assess the degree to which integrity of waterbodies have been degraded, comparisons are made to "reference" conditions. Finding systems with similar ecological compone...
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USE OF SEDIMNT TOTAL ORGANIC CARBON AND GRAIN SIZE AS AN INDICATOR OF ORGANIC ENRICHMENT IN COASTAL SYSTEMS |
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Platform presentation at a scientific meeting...
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USE OF SHORT-TERM GENOTOXIC BIOASSAYS IN THE EVALUATION OF UNREGULATED AUTOMOBILE EMISSIONS |
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Exposure to fuels and fuel additives may occur through direct exposure to uncombusted fuel or fuel additive as well as to products of fuel/fuel-additive combustion. Presence of com...
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USE OF SONOCHEMISTRY IN MONITORING CHLORINATED HYDROCARBONS IN WATER |
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The U.S. Environmental Protection Agency (EPA) has been examining the potential of combining sonication with available measurement technologies for monitoring chlorinated hydrocarb...
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USE OF STABLE CARBON ISOTOPE RATIOS OF FATTY ACIDS TO EVALUATE MICROBIAL CARBON SOURCES IN TERRESTRIAL ENVIRONMENTS |
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We use measurements of the concentration and stable carbon isotopic ratio (D 13C) of individual microbial phospholipid fatty acids (PLFAs) in soils as indicators of live microbial ...
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USE OF STABLE CARBON ISOTOPES TO STUDY MICROBIAL PROCESSES IN ESTUARIES |
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This paper describes the use of bacterial carbon pools and bacterial dynamics in studies of estuarine carbon cycling. he authors suggest that field data from such studies, which in...
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USE OF STABLE ISOTOPES IN ENVIRONMENTAL AND FORENSIC GEOCHEMISTRY STUDIES |
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Stable carbon and hydrogen isotopes have been used for many decades in the petroleum industry, but the development of combined gas chromatography-isotope ratio mass spectrometry (G...
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USE OF SULFUR AND NITROGEN STABLE ISOTOPES TO DETERMINE THE IMPORTANCE OF WHITEBARK PINE NUTS TO YELLOWSTONE GRIZZLY BEARS |
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Whitebark pine (Pinus albicaulis) is a masting species that produces relatively large, fat and protein-rich nuts that are consumed by grizzly bears (Ursus arctos horribilis). Tree...
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USE OF THE COMPOSITION AND STABLE CARBON ISOTOPE RATIO OF MICROBIAL FATTY ACIDS TO STUDY CARBON CYCLING |
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We use measurements of the concentration and stable carbon isotopic ratio (Gamma 13C) of individual microbial phospholipid fatty acids (PLFAS) in soils and sediments as indicators ...
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USE OF THE COMPOSITION AND STABLE CARBONIISOTOPE RATIO OF MICROBIAL FATTY ACIDS TO STUDY CARBON CYCLING |
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We use measurements of the concentration and stable carbon isotopic ratio (*13C) of individual microbial phospholipid fatty acids (PLFAs) in soils and sediments as indicators of li...
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USE OF TOTAL ORGANIC CARBON AND SEDIMENT GRAIN SIZE AS AN ASSESSMENT AND DIAGNOSTIC TOOL |
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Platform presentation at a scientific meeting ...
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USE OF ULTRASOUND IN MONITORING CHEMICAL CONTAMINATION IN WATER |
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The U.S. Environmental Protection Agency (EPA) has been examining the potential for combining sonication with other technologies for monitoring specific classes of organic pollutan...
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USE OF ULVA LACTUCA TO DISTINGUISH PH DEPENDENT TOXICANTS IN MARINE WATERS AND SEDIMENTS |
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Ulva lactuca (sea lettuce) is a cosmopolitan marine attached green seaweed capable of sequestering high environmental levels of ammonia. Ammonia can be acutely toxic to marine orga...
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USE OF WATERSHED CLASSIFICATION IN MONITORING FRAMEWORKS FOR THE WESTERN LAKE SUPERIOR BASIS |
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In this case study we predicted stream sensitivity to nonpoint source pollution based on the nonlinear responses of hydrologic regimes and associated loadings of nonpoint source po...
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USE OF WETLANDS TO TREAT SEPTIC TANK EFFLUENT FROM A CONFERENCE FACILITY |
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The Grailville Retreat Center near Loveland, OH built a wastewater treatment wetland under an experimental permit from OEPA to eliminate overflow from a failing leach field. Grail...
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USE OF δ13C, δ15N AND CARBON TO NITROGEN RATIOS TO EVALUATE THE IMPACT OF SEWAGE DERIVED PARTICULATE ORGANIC MATTER ON THE BENTHIC COMMUNITIES OF THE SOUTHERN CALIFORNIA BIGHT |
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We present stable isotope (δ13C and δ15N) measurements of particulate organic matter (POM) sources and benthic organic matter (OM) compartments, and sediment ...
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USER'S GUIDE FOR EXECUTING OZIPM-4 (OZONE ISOPLETH PLOTTING WITH OPTIONAL MECHANISMS, VERSION 4) WITH CBM-IV (CARBON-BOND MECHANISM-IV) OR OPTIONAL MECHANISMS. VOLUME 2. COMPUTER CODE |
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An updated version of the Ozone Isopleth Plotting Program has been developed for use with EKMA to calculate emission reductions needed to achieve the air quality standard for ozone...
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USER'S GUIDE FOR EXECUTING OZIPM-4 (OZONE ISOPLETH PLOTTING WITH OPTIONAL MECHANISMS, VERSION 4) WITH CBM-IV (CARBON-BOND MECHANISMS-IV) OR OPTIONAL MECHANISMS. VOLUME 1. DESCRIPTION OF THE OZONE ISOPLETH PLOTTING PACKAGE. VERSION 4 |
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An updated version of the Ozone Isopleth Plotting Program has been developed for use with EKMA to calculate emission reductions needed to achieve the air quality standard for ozone...
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USER'S MANUAL FOR THE CHEMICAL TRANSPORT AND FATE MODEL (TOXIWASP), VSION 1 |
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This manual describes the dynamic model TOXIWASP for simulating the transport and fate of toxic chemicals in water bodies. TOXIWASP combines the kinetic structure adapted from the ...
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USERS MANUAL: LANDFILL GAS EMISSIONS MODEL - VERSION 2.0 |
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The document is a user's guide for a computer model, Version 2.0 of the Landfill Gas Emissions Model (LandGEM), for estimating air pollution emissions from municipal solid waste (M...
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USING 14 C METHODOLOGY IN SMOG CHAMBER RESEARCH |
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Smog chambers are large enclosures (~ 10-200 m3) that are used to perform laboratory simulations of atmospheric reactions. By dealing with simple systems in which the n...
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USING ISOTHERMS TO PREDICT GAC'S CAPACITY FOR SYNTHETIC ORGANICS |
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This investigation involved operating a pilot granular activated carbon (GAC) plant to obtain capacity data under typical field conditions, determing isotherms for selected synthet...
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USING METHANOL-WATER SYSTEMS TO INVESTIGATE PHENANTHRENE SORPTION-DESORPTION ON SEDIMENT |
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Sorption isotherm nonlinearity, sorption-desorption hysteresis, slow desorption kinetics, and other nonideal phenomena have been attributed to the differing sorptive characteristic...
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USING POWDERED ACTIVATED CARBON: A CRITICAL REVIEW |
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Because the performance of powdered activated carbon (PAC) for uses other than taste and odor control is poorly documented, the purpose of this article is to critically review uses...
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USING POWDERED ACTIVATED CARBON: A CRITICAL REVIEW |
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Because the performance of powdered activated carbon (PAC) for uses other than taste and odor control is poorly documented, the purpose of this article is to critically review uses...
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USING RESPIROMETRY TO MEASURE HYDROGEN UTILIZATION IN SULFATE REDUCING BACTERIA IN THE PRESENCE OF COPPER AND ZINC |
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A respirometric method has been developed to measure hydrogen utilization by sulfate reducing bacteria (SRB). One application of this method has been to test inhibitory metals eff...
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USING STABLE CARBON ISOTOPES TO ESTIMATE THE RATE OF NATURAL BIODEGRADATION OF MTBE AT FIELD SCALE |
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Natural biodegradation of fuel contaminants in ground water reduces the risk of contamination of drinking water wells. It is very difficult to estimate the natural rate of biodegr...
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USING STABLE ISOTOPE OF CARBON(DELTA13C) AND OXYGEN (DELTA 18O) TO DIFFERENTIATE WINTER FLOUNDER NURSERY AREAS: METHODOLOGY AND APPLICATION |
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Poster proesentation at a scientific meeting...
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USING STABLE ISOTOPES AND MECHANISTIC MODELS TO EXAMINE CARBON RESOURCE PARTITIONING IN THALASSIA TESTUDINUM AND ZOSTERA MARINA |
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Natural and anthropogenic stress negatively impact seagrass production and ecosystem function. Our goal is to better understand seagrass response to reduced light, nutrient and or...
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USING STABLE ISOTOPES TO TRACK BIOMAGNIFICATION OF POLYCHLORINATED BIPHENYLS (PCBS) THROUGH STREAM FOOD WEBS |
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Most studies of biomagnification are from lentic systems, which are characterized by organic matter and sediment retention. However, biomagnification studies in streams are rare. ...
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USING THE AIR QUALITY MODEL TO ANALYZE THE CONCENTRATIONS OF AIR TOXICS OVER THE CONTINENTAL U.S. |
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The U.S. Environmental Protection Agency is examining the concentrations and deposition of hazardous air pollutants (HAPs), which include a large number of chemicals, ranging from ...
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USING WINTER FLOUNDER GROWTH RATES AND STABLE ISOTOPES TO ASSESS HABITAT QUALITY |
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We used winter flounder growth rates and stable isotopes to assess habitat quality across an anthropogenic gradient in Narragansett Bay, Rhode Island. Cages (1 m2) were placed in t...
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USING WINTER FLOUNDER GROWTH RATES TO ASSESS HABITAT QUALITY ACROSS AN ANTHROPOGENIC GRADIENT IN NARRAGANSETT BAY, RI |
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We used growth rates of juvenile winter flounder Pseudopleuronectes americanus to assess anthropogenic influence on habitat quality at three sites in Narragansett Bay, Rhode Island...
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UTILITY FLUE GAS DESULFURIZATION TECHNOLOGY AND COSTS |
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The paper is an overview of utility flue gas desulfurization (FGD) technology and costs. The two commercially offered throwaway and salable product systems that are considered to b...
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UTILIZATION OF DISSOLVED NITROGEN BY HETEROTROPHIC BACTERIOPLANKTON: A COMPARISON OF THREE ECOSYSTEMS |
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The contributions of different organic and inorganic nitrogen and organic carbon sources to heterotrophic bacterioplankton in batch cultures of oceanic, estuarine, and eutrophic ri...
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UTILIZATION OF DISSOLVED NITROGEN BY HETEROTROPHIC BACTERIOPLANKTON: EFFECT OF SUBSTRATE C/N RATIO |
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The significance of dissolved combined amino acids (DCAA), dissolved free amino acids (DFAA), and dissolved DNA (D-DNA) as sources of C and N for marine bacteria in batch cultures ...
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UTILIZATION OF DOC FROM SEAGRASS RHIZOMES BY SEDIMENT BACTERIA: 13C TRACER EXPERIMENTS AND MODELLING |
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Seagrasses are widely recognized as contributing to net ecosystem primary production and to supporting heterotrophy in estuarine systems. We investigated the linkage between seagr...
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UTILIZATION OF FLUORANTHENE BY PSEUDOMONAS PAUCIMOBILIS STRAIN EPA505 |
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Pseudomonas paucimobilis strain EPA505, was previously purified from a 7-membered bacterial community originally isolated from a creosote-contaminated soil for its ability to degra...
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UV RADIATION EFFECTS ON HETEROTROPHIC BACTERIOPLANKTON AND VIRUSES IN MARINE ECOSYSTEMS. |
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t is now apparent that there is a great potential for UVR to impact microbial carbon cycling and
biogeochemical processes. Although variability in effects has been observed, all...
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VALIDATION AND IMPROVEMENT OF EPA (ENVIRONMENTAL PROTECTION AGENCY) REFERENCE METHOD 25 - DETERMINATION OF GASEOUS NONMETHANE ORGANIC EMISSIONS AS CARBON |
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The U.S. Environmental Protection Agency Reference Method 25 measures the total gaseous nonmethane organics as carbon in source emissions. Both laboratory and field studies were co...
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VALIDATION OF A TEST METHOD FOR THE MEASUREMENT OF METHANOL EMISSIONS FROM STATIONARY SOURCES |
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Methanol was designated under Title III of the Clean Air Act Amendments of 1990 as a pollutant to be regulated. he U.S. EPA, through a contract with Research Triangle Institute, ha...
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VALIDATION OF SIGNATURE POLARLIPID FATTY ACID BIOMARKERS FOR ALKANE-UTILIZING BACTERIA IN SOILS AND SUBSURFACE AQUIFER MATERIALS |
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Extractable cell membrane-derived polarlipid ester-linked fatty acids (PLFA) obtained from aerated soils gassed with methane or propane and from methane-and propane-oxidizing bacte...
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VALIDATION STUDIES OF THERMAL EXTRACTION-GC/MS APPLIED TO SOURCE EMISSIONS AEROSOLS: 1. SEMIVOLATILE ANALYTE--NONVOLATILE MATRIX INTERACTIONS |
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This work develops a novel validation approach for studying how non-volatile aerosol matrices of considerably different chemical composition potentially affect the thermal extracti...
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VALIDATION TESTING OF NEW MECHANISMS WITH OUTDOOR CHAMBER DATA, VOLUME 1: COMPARISON OF CB4 AND CAL MECHANISMS |
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The UNC smog chamber data base was used to compare the performance of two state of the science photochemical mechanisms: the Carbon Bond four Mechanism (CB4) and the Carter, Atkins...
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VALIDATION TESTING OF NEW MECHANISMS WITH OUTDOOR CHAMBER DATA, VOLUME 2: ANALYSIS OF VOC DATA FOR THE CB4 AND CAL PHOTOCHEMICAL MECHANISMS |
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Ambient hydrocarbon data were analyzed to derive hydrocarbon speciation for use with the Carbon Bond Four (CB4) and the Carter, Atkinson, Lurmann (CAL) mechanisms. A total of 66 ci...
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VANADIUM CHEMISTRY ESSENTIALS FOR TREATMENT STUDIES |
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The importance of vanadium occurrence and treatment in drinking water has been elevated by its inclusion in the Contaminant Candidate List. Though it is still too early to know the...
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VARIABILITY IN NET PRIMARY PRODUCTION AND CARBON STORAGE IN BIOMASS ACROSS OREGON FORESTS - AN ASSESSMENT INTEGRATING DATA FROM FOREST INVENTORIES, INTENSIVE SITES, AND REMOTE SENSING. (R828309) |
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We used a combination of data from USDA Forest Service inventories, intensive
chronosequences, extensive sites, and satellite remote sensing, to estimate biomass
and net p...
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VARIABILITY OF AQUIFER SORPTION PROPERTIES IN A FIELD EXPERIMENT ON GROUNDWATER TRANSPORT OF ORGANIC SOLUTES: METHODS AND PRELIMINARY RESULTS |
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Methods to characterize the organic solute sorption distribution coefficient, organic carbon content, and specific surface area of aquifer solids from the site of a field experimen...
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VARIATION IN ADIRONDACK, NEW YORK, LAKEWATER CHEMISTRY AS A FUNCTION OF SURFACE AREA |
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Data from a recent survey conducted by the Adirondack Lake Survey Corporation were used to evaluate the influence of lake surface area on the acid-base status of lakes in Adirondac...
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VARIATION OF ELEMENT SPECIATION IN COAL COMBUSTION AEROSOLS WITH PARTICLE SIZE |
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The speciation of sulfur, iron and key trace elements (Cr, As, Se, Zn) in combustion ash aerosols has been examined as a function of size from experimental combustion units burning...
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VARIATION OF KOC IN SURFACE SEDIMENTS FROM NARRAGANSETT BAY AND LONG ISLAND SOUND: ANALYSIS OF THE ROLE OF OTHER PARTICULATE CHARACTERISTICS |
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In the first part of this investigation, we examined whether differences in the Kocs of three nonpolar organic chemicals (Lindane, fluoranthene, tetrachlorinated biphenyl (PCB)) fr...
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VERSATILE AEROSOL CONCENTRATION ENRICHMENT SYSTEM (VACES) FOR SIMULTANEOUS IN VIVO AND IN VITRO EVALUATION OF TOXIC EFFECTS OF ULTRAFINE, FINE AND COARSE AMBIENT PARTICLES. PART II: FIELD EVALUATION. (R827352C001) |
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This study presents results from a field evaluation of a mobile versatile aerosol concentration enrichment system (VACES), designed to enhance the ambient concentrations of ultr...
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VERSATILE AEROSOL CONCENTRATION ENRICHMENT SYSTEM (VACES) FOR SIMULTANEOUS IN-VIVO AND IN-VITRO EVALUATION OF TOXIC EFFECTS OF ULTRAFINE, FINE, AND COARSE AMBIENT PARTICLES. PART II. FIELD EVALUATION. (R826232) |
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AbstractThis study presents results from a field evaluation of a mobile versatile aerosol concentration enrichment system (VACES), designed to enhance the ambient conce...
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VERSATILE PC-BASED DATA ACQUISITION AND CONTROL SYSTEM: AUTOMATION OF EPA'S AIR TOXICS CONTROL LABORATORY |
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The paper discusses the decision making process which resulted in the selection and configuration of the hardware and software for the Air Toxics Control Laboratory (ATCL) designed...
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VERTICAL PROFILES OF TOXICITY, ORGANIC CARBON, AND CHEMICAL CONTAMINANTS IN SEDIMENT CORES FROM THE PALOS VERDES SHELF AND SANTA MONICA BAY, CA |
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The toxicity of sediment to the amphipod Rhepoxynius abronius was determined in the laboratory for 5 cm vertical sections of sediment cores collected at two sites on the Palos Verd...
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VIRAL PATHOGENS AND MICROBIOLOGICAL INDICATORS IN GROUND WATER FROM SMALL PUBLIC WATER SUPPLIES IN SOUTHEASTERN MICHIGAN |
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Thirty-eight public ground-water-supply wells serving less than 3,300 people were sampled from July 1999 through July 2001 in southeastern Michigan to determine (1) occurrence of v...
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VISCOSITY AND BINDER COMPOSITION EFFECTS ON TYROSINASE-BASED CARBON PASTE ELECTRODE FOR DETECTION OF PHENOL AND CATECHOL |
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The systematic study of the effect of binder viscosity on the sensitivity of a tyrosinase-based carbon paste electrode (CPE) biosensor for phenol and catechol is reported. Silic...
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VOC RADIOCARBON MEASUREMENTS DURING SCOS97 AND EMISSIONS INVENTORY VALIDATION |
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Radiocarbon (14C) measurements provide an estimate of the fraction of carbon in a sample that is biogenic. In September 1997 during SCOS97 a series of 3-h canister samples of am...
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VOCS (VOLATILE ORGANIC CHEMICALS) IN DRINKING WATER: COST OF REMOVAL |
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There is growing concern over the quality of the nations groundwater resources. Instances of ground water contamination from organic chemicals have been reported in virtually all s...
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VOLATILE COMPONENT RECOVERY FROM SULFITE EVAPORATOR CONDENSATE |
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This study is on the operation and modification of a demonstration unit to remove sulfur dioxide, methanol, furfural, and acetic acid from its sulfite evaporator condensate. This u...
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VOLATILE ORGANIC COMPOUNDS (VOCS) CHAPTER 31. |
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The term "volatile organic compounds' (VOCs) was originally coined to refer, as a class, to carbon-containing chemicals that participate in photochemical reactions in the ambient (...
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VOLATILE ORGANIC COMPOUNDS IN INDOOR AIR: A SURVEY OF VARIOUS STRUCTURES |
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Co-workers collected indoor air samples in their homes in SUMMA polished canisters. Upon receipt in the laboratory, the whole air samples were analyzed for volatile organic compoun...
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VOLTAMMETRIC DETERMINATION OF ACROLEIN |
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A differential pulse polarographic method was developed for acrolein. It is based on electrochemical reduction of acrolein at the dropping mercury electrode. With this method, acro...
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WASTE MINIMIZATION ASSESSMENT FOR A STEEL FABRICATOR (EPA/600/S-95/006) |
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The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack ...
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WASTE REDUCTION TECHNOLOGY EVALUATIONS AT THREE PRINTED WIRE BOARD MANUFACTURERS |
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Technologies at three printed wire board (PWB) manufacturers were evaluated for waste reduction, and costs were compared to existing operations. rom 1989 to 1993, these evaluations...
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WASTE TREATABILITY TESTS OF SPENT SOLVENT AND OTHER ORGANIC WASTEWATERS |
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Some commercial and industrial facilities treat RCRA spent solvent wastewaters by steam stripping, carbon adsorption, and/or biological processes. Thirteen facilities were visited ...
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WASTE TRETABILITY TESTS OF SPENT SOLVENT AND OTHER ORGANIC WASTEWATERS |
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Some commercial and industrial facilities treat RCRA spent solvent wastewaters by steam stripping, carbon adsorption, and/or biological processes. Thirteen faclities were visited b...
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WASTEWATER CHARACTERIZATION AND PROCESS RELIABILITY FOR POTABLE WASTEWATER RECLAMATION |
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This research effort was initiated to quantify water quality criteria of importance in evaluating the performance of a wastewater treatment facility producing a product water poten...
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WASTEWATER DECHLORINATION STATE-OF-THE-ART FIELD SURVEY AND PILOT STUDIES |
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A study of dechlorination was conducted in the County Sanitation Districts of Los Angeles County to determine the utility and efficiency of the sulfur dioxide method and to provide...
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WASTEWATER DEMINERALIZATION BY CONTINUOUS COUNTER-CURRENT ION EXCHANGE PROCESS |
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A wastewater demineralization study employing a 38 lpm (10 gpm) continuous counter-current ion exchange pilot plant, manufactured by the Chemical Separations Corporation, Oak Ridge...
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WASTEWATER DEMINERALIZATION BY TUBULAR REVERSE OSMOSIS PROCESS |
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A 16 1pm (4.2 gpm) tubular reverse osmosis pilot plant was operated at Pomona Advanced Wastewater Treatment Research Facility for over one year. The purpose of the study was to inv...
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WASTEWATER DEMINERALIZATION BY TWO-STAGE FIXED-BED ION EXCHANGE PROCESS |
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A 9.5 l/min (2.5 gpm) two-stage fixed bed ion exchange process (primary cation - primary anion - secondary cation - secondary anion) was operated on a feed of carbon treated second...
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WASTEWATER SAMPLING, TRANSFER AND CONDITIONING SYSTEM |
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This report describes the construction and field evaluation of an automatic on-line hardware system for reliably sampling, transferring, and conditioning various wastewater-treatme...
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WATER FACTORY 21: RECLAIMED WATER, VOLATILE ORGANICS, VIRUS, AND TREATMENT PERFORMANCE |
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This report describes the performance of Water Factory 21, a 0.66 cu m/s advanced wastewater treatment plant designed to reclaim secondary effluent from a municipal wastewater trea...
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WATER INGESTION DURING SWIMMING ACTIVITIES IN A POOL: A PILOT STUDY |
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Chloroisocyanurates are commonly added to outdoor swimming pools to stabilize chlorine disinfectants. The chloroisocyanurates decompose slowly to release chlorine and cyanuric aci...
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WATER QUALITY IMPROVEMENTS DURING RIVERBANK FILTRATION AT THREE SITES IN THE MIDWESTERN US |
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A 3-year project is underway to evaluate riverbank filtration systems along three major US rivers. A principal aspects of the study involved monitoring a suite or organic, inorgani...
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WATER TREATMENT MODEL FOR POLLUTANT EXPOSURE ASSESSMENT |
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A mathematical model of potable water treatment for toxic substance removal for use in exposure assessment modeling has been developed. The sedimentation, coagulation-flocculation,...
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WATER TREATMENT MODEL FOR POLLUTANT EXPOSURE ASSESSMENT: SYSTEM DOCUMENTATION AND USERS MANUAL |
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A mathematical model of potable water treatment to remove toxic substances has been developed for use in exposure assessment modeling. Treatment processes modeled include sedimenta...
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WATER TREATMENT PROJECT: OBSERVATIONS ON USE OF GAC IN PRACTICE |
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The objectives of this project were: (1) to determine if granular activated carbon (GAC) adsorption beds applied in water treatment practice slough-off organic materials during the...
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WATERSHED NITROGEN MANAGEMENT "UPPER POTOMAC RIVER BASIN CASE STUDY" |
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Are watershed processes controlling the yield, transport, and transformation of carbon, nitrogen, and phosphorous scientifically understood and amenable to man's control in an ecol...
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WATERSHED TREATMENT EFFECT ON ORGANIC CARBON AND COLOR INTERACTIONS IN STREAMS IN THE WESTERN ARM OF LAKE SUPERIOR |
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Dissolved organic carbon can significantly attenuate UV penetration in water bodies and potentially protect aquatic organisms from effects of ozone depletion....
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WEAK-ACID ION EXCHANGE FOR REMOVING BARIUM, RADIUM, AND HARDNESS |
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Weak-acid resin in the hydrogen form was found to effectively remove barium, radium, and hardness, without increasing the sodium content of the product water. The maximum capacity ...
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WELL CONSTRUCTION AND PURGING EFFECTS ON GROUND-WATER SAMPLES |
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Multiple well installations of selected casing materials (i.e., polytetrafluoroethylene (PTFE), 304 stainless steel (SS), and polyvinyl chloride (PVC)) were constructed and sampled...
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WHAT CONTROLS PHYTOPLANKTON PRODUCTION IN NUTRIENT-RICH AREAS OF THE OPEN SEA? |
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The oceans play a critical role in regulating the global carbon cycle. eep-ocean waters are roughly 200% supersaturated with CO2 compared to surface waters, which are in contact wi...
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WHAT IS ADSORBING? THE PARENT COMPOUND, ITS DEGRADATION INTERMEDIATES, OR ITS POLYMER |
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Adsorption onto activated carbon has emerged as one of the best available technologies for complying with existing effluent and water quality standards. ne of the key parameters fo...
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WHAT IS THE POTENTIAL OF FOREST MANAGEMENT TO SLOW THE INCREASE OF ATMOSPHERIC C02? |
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Forests are a major sink for carbon and play an important role in the global carbon cycle. ot only do forests contain huge amounts of carbon, they exchange it very actively with th...
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WHEN CAN CARBON ABATEMENT POLICIES INCREASE WELFARE? THE FUNDAMENTAL ROLE OF DISTORTED FACTOR MARKETS. (R825313) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WINE PRODUCTION FROM CHEESE WHEY |
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The objective of this project was to demonstrate commercial feasibility of producing an alcoholic beverage by wine yeast fermentation of supplemented cheese and cottage cheese whey...
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WOOD-DEGRADING FUNGI AS DEGRADERS OF HAZARDOUS WASTE |
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The biological detoxification of hazardous waste is largely an underdeveloped technology. Bacterial species are known to possess a variety of detoxification skills, apparently asso...
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X-RAY MICROANALYSIS OF CALCIUM, POTASSIUM, AND PHOSPHORUS IN LIVER MITOCHONDRIA STRESSED BY CARBON TETRACHLORIDE |
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Previous measurements of elemental concentrations in liver mitochondria have generally required homogenation and fractionation of liver tissue, a procedure in which it is difficult...
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XAS AND XPS CHARACTERIZATION OF MERCURY BINDING ON BROMINATED ACTIVATED CARBON |
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Brominated powdered activated carbon sorbents have been shown to e quite effective for mercury capture when injected into the flue gas duct at coal-fired power plants and are espec...
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ZENON ENVIRONMENTAL, INC.; CROSS-FLOW PERVAPORATION TECHNOLOGY; INNOVATIVE TECHNOLOGY EVALUATION REPORT (EPA/540/R-95/511) |
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A demonstration of the Zenon cross-flow pervaporation technology was conducted under the Superfund Innovative Technology Evaluation (SITE) program in February 1995 to determine the...
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ZVI-CLAY SOIL MIXING TREATS DNAPL SOURCE AREA AT 35-FOOT DEPTH |
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The DuPont Company and Colorado State University (CSU) are collaborating in development and refinement of a technology that involves in-situ admixing of contaminated soil, granular...
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‘GREENER’ ORGANIC SYNTHESES UNDER NON-TRADITIONAL CONDITIONS |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral supports such as alum...
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