Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
Filter Total Items: 3746
Steroid estrogens, nonylphenol ethoxylate metabolites, and other wastewater contaminants in groundwater affected by a residential septic system on Cape Cod, MA
Septic systems serve approximately 25% of U.S. households and may be an important source of estrogenic and other organic wastewater contaminants (OWC) to groundwater. We monitored several estrogenic OWC, including nonylphenol (NP), nonylphenol mono- and diethoxycarboxylates (NP1EC and NP2EC), the steroid hormones 17β-estradiol (E2), estrone (E1) and their glucuronide and sulfate conjugates, and ot
Authors
C.H. Swartz, S. Reddy, M.J. Benotti, H. Yin, L. B. Barber, Bruce J. Brownawell, R.A. Rudel
Atmospheric mercury speciation in Yellowstone National Park
Atmospheric concentrations of elemental mercury (Hg0), reactive gaseous Hg (RGM), and particulate Hg (pHg) concentrations were measured in Yellowstone National Park (YNP), U.S.A. using high resolution, real time atmospheric mercury analyzers (Tekran 2537A, 1130, and 1135). A survey of Hg0 concentrations at various locations within YNP showed that concentrations generally reflect global background
Authors
B.D. Hall, M.L. Olson, A.P. Rutter, R.R. Frontiera, D. P. Krabbenhoft, D.S. Gross, M. Yuen, T.M. Rudolph, J.J. Schauer
Modeling effects of multinode wells on solute transport
Long-screen wells or long open boreholes with intraborehole flow potentially provide pathways for contaminants to move from one location to another in a ground water flow system. Such wells also can perturb a flow field so that the well will not provide water samples that are representative of ground water quality a short distance away from the well. A methodology is presented to accurately and ef
Authors
Leonard F. Konikow, G.Z. Hornberger
Larval exposure to environmentally relevant mixtures of alkylphenolethoxylates reduces reproductive competence in male fathead minnows
The ubiquitous presence of nonylphenolethoxylate/octylphenolethoxylate (NPE/OPE) compounds in aquatic environments adjacent to wastewater treatment plants (WWTP) warrants an assessment of the endocrine disrupting potential of these complex mixtures on aquatic vertebrates. In this study, fathead minnow larvae were exposed for 64 days to a mixture of NPE/OPE, which closely models the NPE/OPE composi
Authors
T.J. Bistodeau, L. B. Barber, S.E. Bartell, R.A. Cediel, K.J. Grove, J. Klaustermeier, J.C. Woodard, K. E. Lee, H.L. Schoenfuss
Dissimilatory arsenate and sulfate reduction in sediments of two hypersaline, arsenic-rich soda lakes: Mono and Searles Lakes, California
A radioisotope method was devised to study bacterial respiratory reduction of arsenate in sediments. The following two arsenic-rich soda lakes in California were chosen for comparison on the basis of their different salinities: Mono Lake (∼90 g/liter) and Searles Lake (∼340 g/liter). Profiles of arsenate reduction and sulfate reduction were constructed for both lakes. Reduction of [73As]arsenate o
Authors
T.R. Kulp, S.E. Hoeft, L.G. Miller, C. Saltikov, J.N. Murphy, S. Han, B. Lanoil, R.S. Oremland
Application of environmental tracers to mixing, evolution, and nitrate contamination of ground water in Jeju Island, Korea
Tritium/helium-3 (3H/3He) and chlorofluorocarbons (CFCs) were investigated as environmental tracers in ground water from Jeju Island (Republic of Korea), a basaltic volcanic island. Ground-water mixing was evaluated by comparing 3H and CFC-12 concentrations with lumped-parameter dispersion models, which distinguished old water recharged before the 1950s with negligible 3H and CFC-12 from younger w
Authors
D.-C. Koh, Niel Plummer, Solomon D. Kip, E. Busenberg, Y.-J. Kim, H.-W. Chang
Processes affecting transport of uranium in a suboxic aquifer
At the Naturita site in Colorado, USA, groundwaters were sampled and analyzed for chemical composition and by culture and culture-independent microbiological techniques. In addition, sediments were extracted with a dilute sodium carbonate solution to determine quantities of labile uranium within the sediments. Samples from the upgradient portion of the contaminated aquifer, where very little disso
Authors
J.A. Davis, G.P. Curtis, M.J. Wilkins, M. Kohler, P. Fox, D. L. Naftz, J.R. Lloyd
The Amphibian Research and Monitoring Initiative (ARMI): 5-year report
The Amphibian Research and Monitoring Initiative (ARMI) is an innovative, multidisciplinary program that began in 2000 in response to a congressional directive for the Department of the Interior to address the issue of amphibian declines in the United States. ARMI’s formulation was cross-disciplinary, integrating U.S. Geological Survey scientists from Biology, Water, and Geography to develop a cou
Authors
Erin Muths, Alisa L. Gallant, Evan H. Campbell Grant, William A. Battaglin, David E. Green, Jennifer S. Staiger, Susan C. Walls, Margaret S. Gunzburger, Rick F. Kearney
Delineating a shallow fault zone and dipping bed rock strata using multichannal analysis of surface waves with a land streamer
The multichannel analysis of surface waves (MASW) seismic method was used to delineate a fault zone and gently dipping sedimentary bedrock at a site overlain by several meters of regolith. Seismic data were collected rapidly and inexpensively using a towed 30-channel land streamer and a rubberband-accelerated weight-drop seismic source. Data processed using the MASW method imaged the subsurface to
Authors
J. Ivanov, R. D. Miller, P. Lacombe, C. D. Johnson, J.W. Lane
Arsenic and selenium in microbial metabolism
Arsenic and selenium are readily metabolized by prokaryotes, participating in a full range of metabolic functions including assimilation, methylation, detoxification, and anaerobic respiration. Arsenic speciation and mobility is affected by microbes through oxidation/reduction reactions as part of resistance and respiratory processes. A robust arsenic cycle has been demonstrated in diverse environ
Authors
John F. Stolz, Partha Basu, Joanne M. Santini, Ronald S. Oremland
Reply to comment on ‘Characterization of surface and ground water δ18O seasonal variation and its use for estimating groundwater residence times’ by R. E. Criss and W. E. Winston
No abstract available
Authors
Michael M. Reddy, Paul Schuster, Carol Kendall, Micaela B. Reddy
Extracellular and intracellular uptake of zinc in a photosynthetic biofilm matrix:
No abstract available.
Authors
J.M. Morris, J.S. Meyer