Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
Filter Total Items: 3740
Ground water contamination by crude oil near Bemidji, Minnesota
Ground-water contamination by crude oil, and other petroleum-based liquids, is a widespread problem. An average of 83 crude-oil spills occurred per year during 1994-96 in the United States, each spilling about 50,000 barrels of crude oil (U.S. Office of Pipeline Safety, electronic commun., 1997). An understanding of the fate of organic contaminants (such as oil and gasoline) in the subsurface is n
Authors
G. N. Delin, H.I. Essaid, I.M. Cozzarelli, M.H. Lahvis, B.A. Bekins
Metal exposures to native populations of the caddisfly Hydropsyche (Trichoptera: Hydropsychidae) determined from cytosolic and whole body metal concentrations
Metal concentrations of the soluble fraction of the cytoplasm (cytosol) and the whole body were determined in the caddisfly Hydropsyche spp. (Trichoptera). Metal accumulation in the cytosol and the whole body were compared in samples collected along 380 kms of a contamination gradient in the Clark Fork river in four consecutive years (1992–1995), and from a contaminated tributary (Flint Creek). Sa
Authors
D.J. Cain, S. N. Luoma
Comparing nocturnal eddy covariance measurements to estimates of ecosystem respiration made by scaling chamber measurements at six coniferous boreal sites
During the growing season, nighttime ecosystem respiration emits 30–100% of the daytime net photosynthetic uptake of carbon, and therefore measurements of rates and understanding of its control by the environment are important for understanding net ecosystem exchange. Ecosystem respiration can be measured at night by eddy covariance methods, but the data may not be reliable because of low turbulen
Authors
M.B. Lavigne, M. G. Ryan, D.E. Anderson, D. D. Baldocchi, P.M. Crill, D.R. Fitzjarrald, M. L. Goulden, S.T. Gower, J.M. Massheder, J.H. McCaughey, M. Rayment, Robert G. Striegl
Anaerobic aquifer transformations of 2,4-Dinitrophenol under different terminal electron accepting conditions
We evaluated the susceptibility of 2,4-dinitrophenol (2,4-DNP) and 2,4-diaminophenol to anaerobic biodegradation in aquifer slurries. Aquifer microorganisms depleted 2,4-DNP at rates of 25, 9 and 0.4 μM/day under methanogenic, sulfate-reducing and nitrate-reducing conditions, respectively. Rates of abiotic, 2,4-DNP loss in autoclaved control incubations were 7.2, 6.2 and 0.95 μM/day respectively.
Authors
L.R. Krumholz, J.M. Suflita
Tritium, deuterium, and oxygen-18 in water collected from unsaturated sediments near a low-level radioactive-waste burial site south of Beatty, Nevada
Pore water was extracted in March 1996 from cores collected from test holes UZB-1 and UZB-2 drilled November 1992 and September 1993, respectively, in the Amargosa Desert south of Beatty, Nevada. The test holes are part of a study to determine factors affecting water and gas movement through unsaturated sediments. The holes are about 100 meters south of the southwest corner of the fence enclosing
Authors
David E. Prudic, David A. Stonestrom, Robert G. Striegl
The stable isotope geochemistry of jarosite
No abstract available.
Authors
R. O. Rye, Charles N. Alpers
Sequestration of hydrophobic organic contaminants by geosorbents
The chemical interactions of hydrophobic organic contaminants (HOCs) with soils and sediments (geosorbents) may result in strong binding and slow subsequent release rates that significantly affect remediation rates and endpoints. The underlying physical and chemical phenomena potentially responsible for this apparent sequestration of HOCs by geosorbents are not well understood. This challenges our
Authors
Richard G. Luthy, George R. Aiken, Mark L. Brusseau, Scott D. Cunningham, Philip M. Gschwend, Joseph J. Pignatello, Martin Reinhard, Samuel J. Traina, Walter J. Weber, John C. Westall
A study of the temporal variability of atrazine in private well water. part ii: analysis of data
In 1988, the Iowa Department of Natural Resources, along withthe University of Iowa, conducted the Statewide Rural WellWater Survey, commonly known as SWRL. A total of 686private rural drinking water wells was selected by use of aprobability sample and tested for pesticides and nitrate. A subsetof these wells, the 10% repeat wells, were additionally sampledin October, 1990 and June, 1991. Starting
Authors
Paul Pinsky, Matthew Lorber, Kent Johnson, Burton Kross, Leon Burmeister, Amina Wilkins, George Hallberg
Water-quality and hydrogeologic data used to evaluate the effects of farming systems on ground-water quality at the Management Systems Evaluation Area near Princeton, Minnesota, 1991-95
The Minnesota Management Systems Evaluation Area (MSEA) project was part of a multi-scale, inter-agency initiative to evaluate the effects of agricultural management systems on water quality in the midwest corn belt. The research area was located in the Anoka Sand Plain about 5 kilometers southwest of Princeton, Minnesota. The ground-water-quality monitoring network within and immediately surround
Authors
M.K. Landon, G. N. Delin, K.J. Nelson, C.P. Regan, J.A. Lamb, S.J. Larson, P. D. Capel, J. L. Anderson, R.H. Dowdy
Source, transport, and partitioning of metals between water, colloids, and bed sediments of the Animas River, Colorado
No abstract available.
Authors
S. E. Church, B. A. Kimball, D. L. Fey, D.A. Ferderer, T. J. Yager, R. B. Vaughn
Methods to identify areas susceptible to irrigation-induced selenium contamination in the western United States
No abstract available.
Authors
Ralph L. Seiler
How does streamflow affect metals in the upper Arkansas River?
No abstract available.
Authors
Michael E. Lewis, Melanie L. Clark