Studies of Geochemical Processes
Studies consist of work on the degradation, fate, and transport of herbicides in soil and
aquatic environments.
Background and Facilities
-
Central Region,
of USGS for coordination with Midwest Studies, Don Goolsby, Denver, Colorado
-
Engineering Studies, Steve Randtke, University
of Kansas, Lawrence, Kansas
- Toxic
Substances Hydrology Program, Herbert Buxton and David Morganwalp,
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
Accomplishments of Geochemical Processes
- Formation and transport of deethylatrazine in the
soil and vadose zone
- Dissipation of encapsulated herbicides
- Understanding the regional transport of
herbicides and their metabolites in surface water using immunoassay,
GC/MS, HPLC, and
LC/MS
- Herbicide metabolites as indicators of surface-
and ground-water interaction
- Modeling water-quality data using attenuation
factors
For further information, contact:
juliec@usgs.gov
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