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GeoHEALTH-USGS Newsletter

GeoHEALTH-USGS Newsletter

The GeoHEALTH-USGS Newsletter provides information on new USGS science activities related to safeguarding the health of fish, wildlife, domesticated animals, livestock, and people from environmental exposures to contaminants and pathogens.

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Featured Science Activities

Featured Science Activities

Lean about our Featured Science Activities through our pages that highlight recience studies, publications, and results.

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Filter Total Items: 3,165
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Year Published: 1994

Degradation of methyl bromide in anaerobic sediments

Methyl bromide (MeBr) was anaerobically degraded in saltmarsh sediments after reaction with sulfide. The product of this nucleophilic substitution reaction was methanethiol, which underwent further chemical and bacterial reactions to form dimethyl sulfide. These two gases appeared transiently during sediment incubations because they were...

Oremland, R.S.; Miller, L.G.; Strohmaler, F.E.

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Year Published: 1994

Degradation of trifluoroacetate in oxic and anoxic sediments

THE deleterious effect of chlorofluorocarbons on stratospheric ozone has led to international cooperation to end their use. The search for acceptable alternatives has focused on hydrofluorocarbons (HFCs) or hydrochlorofluorocarbons (HCFCs) which are attractive because they have relatively short atmospheric residence times. HFCs and HCFCs are...

Visscher, P.T.; Culbertson, C.W.; Oremland, R.S.
Degradation of trifluoroacetate in oxic and anoxic sediments; 1994; Article; Journal; Nature; Visscher, P. T.; Culbertson, C. W.; Oremland, R. S.

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Year Published: 1994

Determination of alachlor and its sulfonic acid metabolite in water by solid-phase extraction and enzyme-linked immunosorbent assay

No abstract available. 

Aga, D.S.; Thurman, E.M.; Pomes, M.L.
Determination of alachlor and its sulfonic acid metabolite in water by solid-phase extraction and enzyme-linked immunosorbent assay; 1994; Article; Journal; Analytical Chemistry; Aga, D. S.; Thurman, E. M.; Pomes, M. L.

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Year Published: 1994

Displacement of soil pore water by trichloroethylene

Dense nonaqueous phase liquids (DNAPLS) are important pollutants because of their widespread use as chemical and industrial solvents. An example of the pollution caused by the discharge of DNAPLs is found at the Picatinny Arsenal, New Jersey, where trichloroethylene (TCE) has been discharged directly into the unsaturated zone. This discharge has...

Wershaw, R. L.; Aiken, G.R.; Imbrigiotta, T.E.; Goldberg, M.C.
Displacement of soil pore water by trichloroethylene; 1994; Article; Journal; Journal of Environmental Quality; Wershaw, R. L.; Aiken, G. R.; Imbrigiotta, T. E.; Goldberg, M. C.

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Year Published: 1994

Distribution and transport of selected anthropogenic organic compounds on Mississippi River suspended sediment (U.S.A.), May/June 1988

The distribution and transport of selected hydrophobic halogenated organic compounds on suspended sediment from the lower Mississippi River were determined using discharge-weighted sampling with concurrent discharge measurements. Trends in compound concentration from upstream to downstream and the effects of selected tributaries were determined....

Rostad, C.E.; Pereira, W.E.; Leiker, T.J.
Distribution and transport of selected anthropogenic organic compounds on Mississippi River suspended sediment (U.S.A.), May/June 1988; 1994; Article; Journal; Journal of Contaminant Hydrology; Rostad, C. E.; Pereira, W. E.; Leiker, T. J.

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Year Published: 1994

Effects of polar and nonpolar groups on the solubility of organic compounds in soil organic matter

Vapor sorption capacities on a high-organic-content peat, a model for soil organic matter (SOM), were determined at room temperature for the following liquids: n-hexane, 1,4-dioxane, nitroethane, acetone, acetonitrile, 1-propanol, ethanol, and methanol. The linear organic vapor sorption is in keeping with the dominance of vapor partition in peat...

Chiou, C.T.; Kile, D.E.
Effects of polar and nonpolar groups on the solubility of organic compounds in soil organic matter; 1994; Article; Journal; Environmental Science and Technology; Chiou, C. T.; Kile, D. E.

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Year Published: 1994

Estimates of percolation rates and ages of water in unsaturated sediments at two Mojave Desert sites, California-Nevada

Thick unsaturated zones in arid regions increasingly are being sought for the burial of radioactive and other hazardous wastes. Estimating percolation rates of water from precipitation at proposed burial sites is important for site assessment. Chloride profiles in unsaturated sediments are used to show differences and similarities in the rates of...

Prudic, David E.
Estimates of percolation rates and ages of water in unsaturated sediments at two Mojave Desert sites, California-Nevada; 1994; WRI; 94-4160; Prudic, D. E.

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Year Published: 1994

Formation and transport of deethylatrazine and deisopropylatrazine in surface water

No abstract available. 

Thurman, E.M.; Meyer, M.T.; Mills, M.S.; Zimmerman, L.R.; Perry, C.A.; Goolsby, D.A.
Formation and transport of deethylatrazine and deisopropylatrazine in surface water; 1994; Article; Journal; Environmental Science and Technology; Thurman, E. M.; Meyer, M. T.; Mills, M. S.; Zimmerman, L. R.; Perry, C. A.; Goolsby, D. A.

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Year Published: 1994

Geohydrology and ground-water quality in the vicinity of a ground-water-contamination site in Rockford, Illinois

A geohydrologic investigation was performed by the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency, to determine the distribution of volatile organic compounds in a fractured-rock aquifer near the Southeast Rockford Groundwater Contamination Site in Rockford, Ill. The geologic units of concern are the St....

Kay, R.T.; Prinos, S.T.; Paillet, Frederick L.
Geohydrology and ground-water quality in the vicinity of a ground-water-contamination site in Rockford, Illinois; 1994; WRI; 93-4187; Kay, R. T.; Prinos, S. T.; Paillet, F. L.

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Year Published: 1994

Ground-water-quality assessment of the Central Oklahoma Aquifer, Oklahoma; analysis of available water-quality data through 1987

No abstract available.

Parkhurst, David L.; Christenson, Scott C.; Schlottmann, Jamie L.
Ground-water-quality assessment of the Central Oklahoma Aquifer, Oklahoma; analysis of available water-quality data through 1987; 1994; WSP; 2357-B; Parkhurst, David L.; Christenson, Scott C.; Schlottmann, Jamie L.

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Year Published: 1994

Herbicide interchange between a stream and the adjacent alluvial aquifer

Herbicide interchange between a stream and the adjacent alluvial aquifer and quantification of herbicide bank storage during high streamflow were investigated at a research site on the Cedar River flood plain, 10 km southeast of Cedar Rapids, Iowa. During high streamflow in March 1990, alachlor, atrazine, and metolachlor were detected at...

Wang, W.; Squillace, P.

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Year Published: 1994

Hydraulic properties of a fractured-rock aquifer, Lee Valley, San Diego County, California

No abstract available.

Kaehler, Charles A.; Hsieh, Paul A.
Hydraulic properties of a fractured-rock aquifer, Lee Valley, San Diego County, California; 1994; WSP; 2394; Kaehler, Charles A.; Hsieh, Paul A.