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Formation and Transformation of Pesticide Degradation Products Under Various Electron Acceptor Conditions
EPA Grant Number: R825549C037Subproject: this is subproject number 037 , established and managed by the Center Director under grant R825549
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: HSRC (1989) - Great Plains/Rocky Mountain HSRC
Center Director: Erickson, Larry E.
Title: Formation and Transformation of Pesticide Degradation Products Under Various Electron Acceptor Conditions
Investigators: Parkin, G. F. , St. Clair, Martin A.
Institution: University of Iowa
EPA Project Officer: Manty, Dale
Project Period: May 1, 1992 through May 1, 1995
Project Amount: Refer to main center abstract for funding details.
RFA: Hazardous Substance Research Centers - HSRC (1989)
Research Category: Organic Chemical Contamination of Soil/Water
Description:
Objective:The objectives for the proposed research include the following: to develop and operate batch and column reactors, some including soil-water suspensions, under four different electron acceptor conditions (aerobic, nitrate reducing, sulfate reducing, and methanogenic) in which alachlor and atrazine are transformed; to screen for as many biotransformation products from these systems as possible; to determine the differences among the various electron acceptor conditions, and between the systems with and without soil, to aid in the determination of the degradative pathways for each pesticide under each electron acceptor condition; to develop rate constants for the formation and transformation for of as many of the metabolites as possible; and to incorporate the newly developed rate constants into a mathematical model designed to predict the fate of the pesticides under each of the different electron acceptors. Approach:
Proposed research will employ both batch and column reactor techniques, some with soil-water suspensions. Soil obtained from an Iowa agricultural field known to have been treated in the past with atrazine and/or alachlor will be used. Liquid media used in all experiments will be a "synthetic" ground water designed to maintain one of the electron acceptor conditions of interest. All experimental reactors will be run at 16°C in an effort to keep experimental conditions as close as possible to those of a typical Iowa ground water. Reactors will be seeded with cultures which have been growing under desired electron acceptor conditions and have been shown to transform atrazine and alachlor. Acetate will be fed as a carbon and energy source.
Pesticide, acetate, microbial biomass, and electron acceptors will be monitored over time during each experiment. Once a significant fraction of the fed pesticide has been transformed, products of atrazine and alachlor will be assayed in the effluents and/or soil samples of each reactor. Standards for some of the expected transformation products will be obtained. A number of analytical techniques will be employed for identification and quantification of these metabolic products, including use of selective GC detectors, GC-MS, or, if necessary, LC-MS. Unknown metabolites may be further analyzed using NMR spectroscopy.
Expected Results:Recent research has shown that while atrazine and alachlor are transformed in the environment under a variety of conditions, their rates of mineralization are likely much slower than their rates of initial transformation. Thus there are likely a number of degradation products being formed and perhaps accumulating in the environment, and the nature of these products will likely be a function of the particular environment in which they are formed. It is expected that this study will provide information regarding the effect of these different environments on the formation and subsequent transformation of the major degradation products. Publications and Presentations:
Publications have been submitted on this subproject: View all 8 publications for this subproject | View all 900 publications for this center
Journal Articles:Journal Articles have been submitted on this subproject: View all 2 journal articles for this subproject | View all 188 journal articles for this center
Supplemental Keywords:atrazine, alachlor, transformation products, kinetics. , Ecosystem Protection/Environmental Exposure & Risk, Toxics, Water, Geographic Area, Scientific Discipline, Waste, RFA, Remediation, Analytical Chemistry, Chemistry, Hazardous Waste, EPA Region, Fate & Transport, pesticides, Environmental Chemistry, Contaminated Sediments, Hazardous, Ecology and Ecosystems, Geochemistry, pesticide runoff, electron acceptors, fate and transport, phytoremediation, fate and transport , soil and groundwater remediation, groundwater, chemical kinetics, contaminated sediment, hazardous wate, contaminant transport, Region 8, contaminated soil, bioremediation of soils, contaminated groundwater, groundwater remediation, sediment treatment, Region 7, alachor, pesticide residue
Progress and Final Reports:
Final Report
Main Center Abstract and Reports:
R825549 HSRC (1989) - Great Plains/Rocky Mountain HSRC
Subprojects under this Center:
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R825549C006 Fate of Trichloroethylene (TCE) in Plant/Soil Systems
R825549C007 Experimental Study of Stabilization/Solidification of Hazardous Wastes
R825549C008 Modeling Dissolved Oxygen, Nitrate and Pesticide Contamination in the Subsurface Environment
R825549C009 Vadose Zone Decontamination by Air Venting
R825549C010 Thermochemical Treatment of Hazardous Wastes
R825549C011 Development, Characterization and Evaluation of Adsorbent Regeneration Processes for Treament of Hazardous Waste
R825549C012 Computer Method to Estimate Safe Level Water Quality Concentrations for Organic Chemicals
R825549C013 Removal of Nitrogenous Pesticides from Rural Well-Water Supplies by Enzymatic Ozonation Process
R825549C014 The Characterization and Treatment of Hazardous Materials from Metal/Mineral Processing Wastes
R825549C015 Adsorption of Hazardous Substances onto Soil Constituents
R825549C016 Reclamation of Metal and Mining Contaminated Superfund Sites using Sewage Sludge/Fly Ash Amendment
R825549C017 Metal Recovery and Reuse Using an Integrated Vermiculite Ion Exchange - Acid Recovery System
R825549C018 Removal of Heavy Metals from Hazardous Wastes by Protein Complexation for their Ultimate Recovery and Reuse
R825549C019 Development of In-situ Biodegradation Technology
R825549C020 Migration and Biodegradation of Pentachlorophenol in Soil Environment
R825549C021 Deep-Rooted Poplar Trees as an Innovative Treatment Technology for Pesticide and Toxic Organics Removal from Soil and Groundwater
R825549C022 In-situ Soil and Aquifer Decontaminaiton using Hydrogen Peroxide and Fenton's Reagent
R825549C023 Simulation of Three-Dimensional Transport of Hazardous Chemicals in Heterogeneous Soil Cores Using X-ray Computed Tomography
R825549C024 The Response of Natural Groundwater Bacteria to Groundwater Contamination by Gasoline in a Karst Region
R825549C025 An Electrochemical Method for Acid Mine Drainage Remediation and Metals Recovery
R825549C026 Sulfide Size and Morphology Identificaiton for Remediation of Acid Producing Mine Wastes
R825549C027 Heavy Metals Removal from Dilute Aqueous Solutions using Biopolymers
R825549C028 Neutron Activation Analysis for Heavy Metal Contaminants in the Environment
R825549C029 Reducing Heavy Metal Availability to Perennial Grasses and Row-Crops Grown on Contaminated Soils and Mine Spoils
R825549C030 Alachlor and Atrazine Losses from Runoff and Erosion in the Blue River Basin
R825549C031 Biodetoxification of Mixed Solid and Hazardous Wastes by Staged Anaerobic Fermentation Conducted at Separate Redox and pH Environments
R825549C032 Time Dependent Movement of Dioxin and Related Compounds in Soil
R825549C033 Impact of Soil Microflora on Revegetation Efforts in Southeast Kansas
R825549C034 Modeling the use of Plants in Remediation of Soil and Groundwater Contaminated by Hazardous Organic Substances
R825549C035 Development of Electrochemical Processes for Improved Treatment of Lead Wastes
R825549C036 Innovative Treatment and Bank Stabilization of Metals-Contaminated Soils and Tailings along Whitewood Creek, South Dakota
R825549C037 Formation and Transformation of Pesticide Degradation Products Under Various Electron Acceptor Conditions
R825549C038 The Effect of Redox Conditions on Transformations of Carbon Tetrachloride
R825549C039 Remediation of Soil Contaminated with an Organic Phase
R825549C040 Intelligent Process Design and Control for the Minimization of Waste Production and Treatment of Hazardous Waste
R825549C041 Heavy Metals Removal from Contaminated Water Solutions
R825549C042 Metals Soil Pollution and Vegetative Remediation
R825549C043 Fate and Transport of Munitions Residues in Contaminated Soil
R825549C044 The Role of Metallic Iron in the Biotransformation of Chlorinated Xenobiotics
R825549C045 Use of Vegetation to Enhance Bioremediation of Surface Soils Contaminated with Pesticide Wastes
R825549C046 Fate and Transport of Heavy Metals and Radionuclides in Soil: The Impacts of Vegetation
R825549C047 Vegetative Interceptor Zones for Containment of Heavy Metal Pollutants
R825549C048 Acid-Producing Metalliferous Waste Reclamation by Material Reprocessing and Vegetative Stabilization
R825549C049 Laboratory and Field Evaluation of Upward Mobilization and Photodegradation of Polychlorinated Dibenzo-P-Dioxins and Furans in Soil
R825549C050 Evaluation of Biosparging Performance and Process Fundamentals for Site Remediation
R825549C051 Field Scale Bioremediation: Relationship of Parent Compound Disappearance to Humification, Mineralization, Leaching, Volatilization of Transformaiton Intermediates
R825549C052 Chelating Extraction of Heavy Metals from Contaminated Soils
R825549C053 Application of Anaerobic and Multiple-Electron-Acceptor Bioremediation to Chlorinated Aliphatic Subsurface Contamination
R825549C054 Application of PGNAA Remote Sensing Methods to Real-Time, Non-Intrusive Determination of Contaminant Profiles in Soils
R825549C055 Design and Development of an Innovative Industrial Scale Process to Economically Treat Waste Zinc Residues
R825549C056 Remediation of Soils Contaminated with Wood-Treatment Chemicals (PCP and Creosote)
R825549C057 Effects of Surfactants on the Bioavailability and Biodegradation of Contaminants in Soils
R825549C058 Contaminant Binding to the Humin Fraction of Soil Organic Matter
R825549C059 Identifying Ground-Water Threats from Improperly Abandoned Boreholes
R825549C060 Uptake of BTEX Compounds by Hybrid Poplar Trees in Hazardous Waste Remediation
R825549C061 Biofilm Barriers for Waste Containment
R825549C062 Plant Assisted Remediation of Soil and Groundwater Contaminated by Hazardous Organic Substances: Experimental and Modeling Studies
R825549C063 Extension of Laboratory Validated Treatment and Remediation Technologies to Field Problems in Aquifer Soil and Water Contamination by Organic Waste Chemicals