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Modeling Dissolved Oxygen, Nitrate and Pesticide Contamination in the Subsurface Environment
EPA Grant Number: R825549C008Subproject: this is subproject number 008 , 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: Modeling Dissolved Oxygen, Nitrate and Pesticide Contamination in the Subsurface Environment
Investigators: Schnoor, J. L. , Parkin, G. F.
Current Investigators: Schnoor, J. L.
Institution: University of Iowa , Kansas State University
EPA Project Officer: Manty, Dale
Project Period: February 1, 1989 through February 1, 1992
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 of this project are three-fold: To develop better mathematical model formulations for the fate and transport of pesticides in the unsaturated zone and saturated groundwater; to perform field and laboratory experiments on the fate and transport of alachlor and atrazine to test the model formulations; and to assess the effects of best management practices and reduced pesticide application rates on groundwater contamination and runoff of agricultural pesticides. Approach:
A small plot study was initiated in Iowa, and planted with corn, poplar trees, and with barren ground. Alachlor and atrazine were applied, singly and in combination. The fate and transport of these pesticides were monitored through the field season that year. Laboratory studies were initiated in the following spring to study mineralization and degradation kinetics of the triazine herbicide, atrazine, under different soil environmental conditions, which could be used in the model formulation. Laboratory experiments were performed using 14C ring and isopropyl side chain labeled atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) applied to three Iowa soils incubated in batch reactors under different environmental conditions.
The different soil environmental conditions simulated included two electron acceptor conditions (aerobic and anoxic with nitrate as the electron acceptor), different soil type/organic carbon content, moisture content, addition of surrogate plant exudates in the form of organic acids, and the influence of plant rooting. In addition, the effect of varying soil oxygen content was also studied. Degradation and mineralization kinetics under different temperatures were not performed as there is sufficient information on these in the research literature. The experiments were set-up to simulate conditions in deeper unsaturated soils where air diffusion from the surface will be limited. Comparison of mineralization and primary degradation kinetics under different environmental conditions allowed computations to be made on relative persistence of the primary compound and some of its primary and secondary metabolites which may be toxic too.
EPA's PRZM (Pesticide Root Zone Model, Carsel et al, 1984) model was with the data from the above study to predict fate of atrazine at the Iowa.
Expected Results:It is anticipated that this project will aide in the development of new formulations with results from controlled field studies and laboratory experiments with radio-labeled C-14 pesticides and further testing will occur using existing pesticide fate and transport models. Publications and Presentations:
Publications have been submitted on this subproject: View all 15 publications for this subproject | View all 900 publications for this center
Journal Articles:Journal Articles have been submitted on this subproject: View all 5 journal articles for this subproject | View all 188 journal articles for this center
Supplemental Keywords:modeling, pesticides, transport, fate, plant uptake. , Ecosystem Protection/Environmental Exposure & Risk, Water, Geographic Area, Scientific Discipline, Waste, RFA, Remediation, Analytical Chemistry, Chemistry, Hazardous Waste, EPA Region, Fate & Transport, Environmental Chemistry, Contaminated Sediments, Hazardous, Ecology and Ecosystems, Geochemistry, heavy metal contamination, heavy metals, pesticide runoff, fate and transport, phytoremediation, fate and transport , soil and groundwater remediation, groundwater, chemical kinetics, contaminated sediment, hazardous wate, contaminant transport, Region 8, pesticides, contaminated soil, bioremediation of soils, bioremediation, mathmatical modeling, contaminated groundwater, groundwater remediation, sediment treatment, Region 7, pesticide residue, nitrate
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