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Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).

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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March 1, 1985

Sorption of lead onto two gram-negative marine bacteria in seawater Sorption of lead onto two gram-negative marine bacteria in seawater

Laboratory adsorption experiments performed at environmentally significant lead (Pb) and cell concentrations indicate that the marine bacteria examined have significant binding capacities for Pb. However, the behavior governing Pb sorption onto gram-negative bacteria in seawater may be quite complex. The sorption kinetics appear to involve two distinct phases, i.e., a rapid removal of Pb...

Authors

Ronald W. Harvey, James O. Leckie

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Application of NMR spectroscopy for determining functionality in humic substances Application of NMR spectroscopy for determining functionality in humic substances

No abstract available.

Authors

Robert L. Wershaw

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Molecular weight and size measurements of humic substances Molecular weight and size measurements of humic substances

No abstract available.

Authors

R.L. Wershaw, George R. Aiken

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

January 1, 1985

Groundwater forecasting Groundwater forecasting

No abstract available.

Authors

Leonard F. Konikow, E.P. Patten

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Stable isotope and amino acid composition of estuarine dissolved colloidal material Stable isotope and amino acid composition of estuarine dissolved colloidal material

No abstract available.

Authors

A.C. Sigleo, S.A. Macko

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Aspects of the biogeochemistry of Big Soda Lake, Nevada Aspects of the biogeochemistry of Big Soda Lake, Nevada

No abstract available.

Authors

Ronald S. Oremland, R. L. Smith, Charles W. Culbertson

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, New England Water Science Center

January 1, 1985

Humic substances in groundwater Humic substances in groundwater

No abstract available.

Authors

E.M. Thurman

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Approaches to the study of lake hydrology Approaches to the study of lake hydrology

No abstract available

Authors

Gene E Likens

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Phosphorus-zinc interactive effects on growth by Selenastrum capricornutum (chlorophyta) Phosphorus-zinc interactive effects on growth by Selenastrum capricornutum (chlorophyta)

No abstract available.

Authors

J.S. Kuwabara

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Pyrolysis-mass spectrometry/pattern recognition on a well-characterized suite of humic samples Pyrolysis-mass spectrometry/pattern recognition on a well-characterized suite of humic samples

A suite of well-characterized humic and fulvic acids of freshwater, soil and plant origin was subjected to pyrolysis-mass spectrometry and the resulting data were analyzed by pattern recognition and factor analysis. A factor analysis plot of the data shows that the humic acids and fulvic acids can be segregated into two distinct classes. Carbohydrate and phenolic components are more...

Authors

P. MacCarthy, S.J. DeLuca, K.J. Voorhees, Ronald L. Malcolm, E.M. Thurman

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Error bounds in cascading regressions Error bounds in cascading regressions

Cascading regressions is a technique for predicting a value of a dependent variable when no paired measurements exist to perform a standard regression analysis. Biases in coefficients of a cascaded-regression line as well as error variance of points about the line are functions of the correlation coefficient between dependent and independent variables. Although this correlation cannot be...

Authors

M.R. Karlinger, B.M. Troutman

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 1985

Origin of caves and other solution openings in the unsaturated (vadose) zone of carbonate rocks: A model for CO2 generation Origin of caves and other solution openings in the unsaturated (vadose) zone of carbonate rocks: A model for CO2 generation

The enigma that caves and other solution openings form in carbonate rocks at great depths below land surface rather than forming from the surface downward can be explained by the generation of CO2 within the aquifer system. In the proposed model, CO2 is generated by the oxidation of particulate and/or dissolved organic carbon that is transported from the land surface deep into the...

Authors

W.W. Wood

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program