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GeoHEALTH-USGS Newsletter

The GeoHEALTH–USGS Newsletter—published since 2004—provides information on USGS science activities pertinent to safeguarding the health of fish, wildlife, domesticated animals, and people from environmental exposures to contaminants and pathogens.

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Brown Bullhead from the Ashtabula River Illustrating the External Tumors Observed

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January 1, 1991

Work plan for regional reconnaissance for selected herbicides and nitrate in ground water of the mid-continent United States, 1991

An approach was developed to obtain a consistent, regional distribution of herbicide and nitrate data from near-surface aquifers in the corn and soybean producing region of the mid-continent. Near-surface aquifers are defined as those with the top of aquifer material within 50 feet of land surface, regardless of whether the material is saturated or unsaturated. Three hundred wells will be selected

Authors

D.W. Kolpin, M. R. Burkart

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Central Midwest Water Science Center

January 1, 1991

Assessment of hydrogeologic conditions with emphasis on water quality and wastewater injection, Southwest Sarasota and West Charlotte counties, Florida

No abstract available.

Authors

C. B. Hutchinson

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Geochemical investigation of an oil spill in San Francisco Bay, California

No abstract available.

Authors

F. D. Hostettler, J. B. Rapp, K. A. Kvenvolden

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

A steady-state unsaturated-zone model to simulate pesticide transport

No abstract available.

Authors

A. T. Rutledge, J. O. Helgesen

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Kansas Water Science Center

January 1, 1991

An interactive code (NETPATH) for modeling NET geochemical reactions along a flow PATH

No abstract available.

Authors

Niel Plummer, E.C. Prestemon, D.L. Parkhurst

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the middle Rio Grande Valley and Bosque del Apache National Wildlife Refuge, New Mexico, 1988-89

No abstract available.

Authors

Kim Ong, T. F. O'Brien, M.D. Rucker

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Partitioning of elements between two size sediment fractions in samples from nineteen areas of the Western United States

No abstract available.

Authors

R. C. Severson, K. C. Stewart, Thelma F. Harms

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Analytical results for sedge samples collected on the wetland receiving acid mine drainage waters from St. Kevin Gulch, Leadville, Colorado

No abstract available.

Authors

B.M. Erickson, Paul H. Briggs, K. R. Kennedy, T.R. Peacock

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Geochemistry of dissolved inorganic carbon in a Coastal Plain aquifer. 1. Sulfate from confining beds as an oxidant in microbial CO2 production

A primary source of dissolved inorganic carbon (DIC) in the Black Creek aquifer of South Carolina is carbon dioxide produced by microbially mediated oxidation of sedimentary organic matter. Groundwater chemistry data indicate, however, that the available mass of inorganic electron acceptors (oxygen, Fe(III), and sulfate) and observed methane production is inadequate to account for observed CO2prod

Authors

F. H. Chapelle, P. B. McMahon

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

MBSSAS: A code for the computation of margules parameters and equilibrium relations in binary solid-solution aqueous-solution systems

The computer code MBSSAS uses two-parameter Margules-type excess-free-energy of mixing equations to calculate thermodynamic equilibrium, pure-phase saturation, and stoichiometric saturation states in binary solid-solution aqueous-solution (SSAS) systems. Lippmann phase diagrams, Roozeboom diagrams, and distribution-coefficient diagrams can be constructed from the output data files, and also can be

Authors

P. D. Glynn

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Selectivity and effectiveness of extractants used to release metals associated with organic matter

Partial extraction procedures can be used to release metals associated with organic matter in natural materials. Reagents commonly employed for this purpose include hydrogen peroxide, Na hypochlorite and Na pyrophosphate. This study tested the selectivity of these reagents by comparing the amount of Fe, Mn, Zn and Cu they released from sulfide and oxide minerals and determined the ability of these

Authors

C.S.E. Papp, L.H. Filipek, K. S. Smith

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1991

Coprecipitation mechanisms and products in manganese oxidation in the presence of cadmium

Manganese oxidation products were precipitated in an aerated open-aqueous system where a continuous influx of mixed Mn2+ and Cd2+ solution was supplied and pH was maintained with an automated pH-stat adding dilute NaOH. X-ray diffraction and electron diffraction identified the solids produced as mixtures of Cd2Mn34+O8, Mn2+2Mn4+3O8, MnO2 (ramsdellite), and CdCO3. Mean oxidation numbers of the tota

Authors

J. D. Hem, Carol J. Lind

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

Publications

GeoHEALTH-USGS Newsletter

Featured Science Activities

Work plan for regional reconnaissance for selected herbicides and nitrate in ground water of the mid-continent United States, 1991

Assessment of hydrogeologic conditions with emphasis on water quality and wastewater injection, Southwest Sarasota and West Charlotte counties, Florida

Geochemical investigation of an oil spill in San Francisco Bay, California

A steady-state unsaturated-zone model to simulate pesticide transport

An interactive code (NETPATH) for modeling NET geochemical reactions along a flow PATH

Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the middle Rio Grande Valley and Bosque del Apache National Wildlife Refuge, New Mexico, 1988-89

Partitioning of elements between two size sediment fractions in samples from nineteen areas of the Western United States

Analytical results for sedge samples collected on the wetland receiving acid mine drainage waters from St. Kevin Gulch, Leadville, Colorado

Geochemistry of dissolved inorganic carbon in a Coastal Plain aquifer. 1. Sulfate from confining beds as an oxidant in microbial CO2 production

MBSSAS: A code for the computation of margules parameters and equilibrium relations in binary solid-solution aqueous-solution systems

Selectivity and effectiveness of extractants used to release metals associated with organic matter

Coprecipitation mechanisms and products in manganese oxidation in the presence of cadmium

U.S. Geological Survey

U.S. Department of the Interior