Organic Geochemistry Research Laboratory
Geochemical Process Studies
Studies and accomplishments include work on the formation and transport of herbicides and
their degradation products in the soil and vadose zone, dissipation of encapsulated
herbicides, understanding the regional transport of herbicides and their degradation
producs in surface water, and herbicide degradation products as indicators of surface and
ground-water interaction.
Background and Facilities
- Central Region,
of USGS for coordination with Midwest Studies, Bill Battaglin, Denver, Colorado
- Geology, J.F. Devlin,
University of Kansas, Lawrence, Kansas
- Toxic Substances Hydrology Program, Herbert
Buxton and Michael Focazio, Headquarters, Reston, Virginia
Examples of Geochemical Studies
- Metabolism of herbicides
- Transport, sorption, and degradation of hydrologic tracers
- Fate and transport modelling
- Variations in toxicity of surface-water samples
Geochemical process work include the following:
- Formation and transport of deethylatrazine in the soil and vadose zone
- Dissipation of encapsulated herbicides
- Regional transport of herbicides, antibiotics and their degradation products in
surface water using immunoassay, GC/MS, LC/MS, and LC/MS/MS
- Herbicide degradation products as indicators of surface- and ground-water interaction
- Modeling water-quality data using attenuation factors
Selected Geochemical Process References
- Adams, C.D. and Thurman, E.M., 1991,
Formation and Transport of
Deethylatrazine in the Soil and Vadose Zone: Journal of Environmental Quality,
v. 20, no. 3, p. 540-547.
- Aga, D.S., and Thurman, E.M., 2001,
Formation and Transport of
the Sulfonic Acid Metabolites of Alachlor and Metolachlor in Soil:
Environmental Science and Technology, v. 34, no. 13, p. 2455-2460.
- Kolpin, D.W., Thurman, E.M., Linhart, S.M., 1998,
The Environmental Occurrence of
Herbicides: The Importance of Degradates in Ground Water: Archives of
Environmental Contamination and Toxicology, v. 35, p. 385-390.
- Lerch, R.N., Blanchard, P.E., and Thurman, E.M. 1998,
Contribution of Hydroxylated
Atrazine Degradation Products to the Total Atrazine Load in Midwestern
Streams: Environmental Science and Technology, v. 32, p. 40-48.
- Meyer, M.T., Thurman, E.M., and Goolsby, D.A., 2001,
Differentiating Nonpoint
Sources of Deisopropylatrazine in Surface Water using Discrimination Diagrams,
Journal of Environmental Quality, v. 30, p. 1836-1843.
- Mills, M.S. and Thurman, E.M., 1994,
Preferential Dealkylation
Reactions of S-Triazine Herbicides in the Unsaturated Zone: Environmental
Science and Technology, v. 28, no. 4, p. 600-605.
- Thurman, E.M., Meyer, M.T., Mills, M.S., Zimmerman, L.R., Perry, C.A., and
Goolsby, D.A., 1994,
Formation and Transport of Deethylatrazine and Deisopropylatrazine in Surface
Water: Environmental Science and Technology, v. 28, no. 13, p. 2267-2277.
- Thurman, E.M. and Fallon, J.D., 1996,
The Deethylatrazine/Atrazine
Ratio as an Indicator of the Onset of the Spring Flush of Herbicides into Surface
Water of the Midwestern United States: International Journal of Environmental
Analytical Chemistry, v. 65, p. 203-214.
- Thurman, E.M., Meyer, M.T., Mills, M.S., Zimmerman, L.R., Perry, C.A., and Goolsby, D.A., 1994,
Formation and Transport of Deethylatrazine
and Deisopropylatrazine in Surface Water:
Environmental Science and Technology, v. 28, no. 13, p. 2267-2277.
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U.S. Department of the Interior |
U.S. Geological Survey
The USGS has collected hydrologic information in Kansas since 1895 with the first USGS Cooperative
Water Program funding agreement for 6 streamflow gages with the Kansas Water Board. USGS collects streamflow
and gage-height data; reservoir content; water-quality and water-quantity data; suspended-sediment data;
and groundwater levels. Hydrologic studies are conducted on national, regional, statewide, and local levels.
The USGS in Kansas works cooperatively with 31 Federal, State, and local agencies, such as the Kansas Water Office, the U.S.Army Corps of Engineers, and the City of Wichita