Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
GeoHEALTH-USGS Newsletter
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.
Featured Science Activities
Featured Science Activities
Learn about our Featured Science Activities through our pages that highlight studies, publications, and results.
Filter Total Items: 4098
Contaminants in the Upper Mississippi: Summary and conclusions Contaminants in the Upper Mississippi: Summary and conclusions
No abstract available.
Authors
Samuel N. Luoma
Groundwater contamination and aquifer reclamation at the Rocky Mountain Arsenal, Colorado Groundwater contamination and aquifer reclamation at the Rocky Mountain Arsenal, Colorado
No abstract available.
Authors
Leonard F. Konikow, D. Thompson
Volatilization of chlorinated hydrocarbons from water Volatilization of chlorinated hydrocarbons from water
Coefficients for the volatilization from water of 1,1,1-trichloroethane and 1,2-dichloroethane were measured in a stirred tank. Experiments at constant mixing conditions over a wide range of concentrations showed that the volatilization coefficient was independent of concentration, confirming the assumption that volatilization is a first order process. Simultaneous measurements of the
Authors
R. E. Rathbun, D. Y. Tai
Pore volume determination in activated carbon and coal Pore volume determination in activated carbon and coal
No abstract available.
Authors
P.J. Reucroft, K.B. Patel, C. T. Chiou
Comparison of nonlinear least squares and log transformation procedures for calculating volatilization coefficients Comparison of nonlinear least squares and log transformation procedures for calculating volatilization coefficients
A nonlinear least squares procedure and a log transformation procedure for calculating first-order rate coefficients from experimental concentration-versus-time data were compared using laboratory measurements of the volatilization from water of 1,1,1-trichloroethane and 1,2-dichloroethane and the absorption of oxygen by water. Ratios of the nonlinear least squares to log transformation
Authors
R. E. Rathbun, D. Y. Tai
The role of bacterial exopolymer and suspended bacteria in the nutrition of the deposit-feeding clam, Macoma balthica The role of bacterial exopolymer and suspended bacteria in the nutrition of the deposit-feeding clam, Macoma balthica
Significant removal and assimilation of suspended bacteria by M. balthica was observed within two days, although the low clearance rates suggested planktonic bacteria may not be among its major food sources.
Authors
R.W. Harvey, Samuel N. Luoma
Subsurface injection of treated sewage into a saline-water aquifer at St. Petersburg, Florida - Aquifer pressure buildup Subsurface injection of treated sewage into a saline-water aquifer at St. Petersburg, Florida - Aquifer pressure buildup
The city of St. Petersburg has been testing subsurface injection of treated sewage into the Floridan aquifer as a means of eliminating discharge of sewage to surface waters and as a means of storing treated sewage for future nonpotable reuse. Treated sweage that had a mean chloride concentration of 170 milligrams per liter (mg/l) was injected through a single well for 12 months at a mean...
Authors
J.J. Hickey
Copper transport along a Sierra Nevada stream Copper transport along a Sierra Nevada stream
No abstract available.
Authors
James S. Kuwabara, H.V. Leland, Kenneth E. Bencala
Isotope composition of sulphate in acid mine drainage as measure of bacterial oxidation Isotope composition of sulphate in acid mine drainage as measure of bacterial oxidation
The formation of acid waters by oxidation of pyrite-bearing ore deposits, mine tailing piles, and coal measures is a complex biogeochemical process and is a serious environmental problem. We have studied the oxygen and sulphur isotope geochemistry of sulphides, sulphur, sulphate and water in the field and in experiments to identify sources of oxygen and reaction mechanisms of sulphate...
Authors
B.E. Taylor, M.C. Wheeler, D. Kirk Nordstrom
Field testing the hypothesis of Darcian flow through a carbonate aquifer Field testing the hypothesis of Darcian flow through a carbonate aquifer
The acceptability of the hypothesis of Darcian flow through a semiconfined carbonate aquifer was tested prior to running a multiple-day aquifer test in Pinellas County, Florida. The approach used to test the hypothesis was to run a number of hour-long aquifer tests at different discharges with drawdown measured at the same time during each test in two observation wells, one at 35 feet...
Authors
J.J. Hickey
Denitrification associated with stream periphyton: Chamber estimates from undisrupted communities Denitrification associated with stream periphyton: Chamber estimates from undisrupted communities
Undisrupted periphyton communities from a N‐rich (NO3− = 63 µmol L−1) and pristine (NO3− = 2.9 µmol L−1) stream were assayed for denitrifying activity (acetylene‐blockage technique) in 40‐L chambers incubated at in situ temperature and nutrient concentrations. Nitrous oxide formation associated with periphyton from the N‐rich stream was immediate and linear (52.1 µmol N2O m−2 h−1) in the...
Authors
J.H. Duff, F.J. Triska, R.S. Oremland