William H. Orem, Ph.D.
William Orem (Bill), Ph.D. is a Supervisory Research Chemist (Geochemist) and Principal Investigator with the USGS Geology, Energy & Minerals (GEM) Science Center in Reston, VA.
Professional Experience
Research Chemist, U.S. Geological Survey (1984-present)
Adjunct Faculty, University of Maryland, Department of Geology (1982-1992)
National Research Council Postdoctoral Associate (1982-1984)
Education and Certifications
B.S. Chemistry, Lehigh University
M.S. Oceanography, University of Delaware
Ph.D. Chemistry, University of New Hampshire
Science and Products
Filter Total Items: 129
A geostatistical approach to predicting sulfur content in the Pittsburgh coal bed
The US Geological Survey (USGS) is completing a national assessment of coal resources in the five top coal-producing regions in the US. Point-located data provide measurements on coal thickness and sulfur content. The sample data and their geologic interpretation represent the most regionally complete and up-to-date assessment of what is known about top-producing US coal beds. The sample data are
Authors
W.D. Watson, L.F. Ruppert, L. J. Bragg, S. J. Tewalt
The Upper Pennsylvanian Pittsburgh coal bed: Resources and mine models
The U.S. Geological Survey recently completed a digital coal resource assessment model of the Upper Pennsylvanian Pittsburgh coal bed, which indicates that after subtracting mined-out coal, 16 billion short tons (14 billion tonnes) remain of the original 34 billion short tons (31 billion tonnes) of coal. When technical, environmental, and social restrictions are applied to the remaining Pittsburgh
Authors
W.D. Watson, L.F. Ruppert, S. J. Tewalt, L. J. Bragg
Regional geochemistry of metals in organic-rich sediments, sawgrass and surface water, from Taylor Slough, Florida
No abstract available.
Authors
L. P. Gough, R. K. Kotra, C. W. Holmes, W. H. Orem, P. L. Hageman, Paul H. Briggs, A. L. Meier, Z. A. Brown
Geochemistry of sulfur in the Florida Everglades: 1994 through 1999
In this report, we present data on the geochemistry of sulfur in sediments and in surface water, groundwater, and rainwater in the Everglades region in south Florida. The results presented here are part of a larger study intended to determine the roles played by the cycling of carbon, nitrogen, phosphorus, and sulfur in the ecology of the south Florida wetlands. The geochemistry of sulfur in the r
Authors
Anne L. Bates, W. H. Orem, J. W. Harvey, E.C. Spiker
Use of 234U and 238U isotopes to identify fertilizer-derived uranium in the Florida Everglades
Surface water and peat in the northern Everglades have very low natural concentrations of U and are therefore sensitive to the addition of small amounts of U from anthropogenic sources such as fertilizer. Peat samples collected along a nutrient gradient in the northern Everglades have unusually high concentrations of U (> 1 ??g/g, dry basis) and also have a distinctive 234U/238U activity ratio (AR
Authors
R. A. Zielinski, K. R. Simmons, W. H. Orem
Functional groups and elemental analyses of cuticular morphotypes of Cordaites principalis (Germar) Geinitz, Carboniferous Maritimes Basin, Canada
Well-preserved cuticles were isolated from Cordaites principalis (Germar) Geinitz leaf compressions, i.e., foliage from extinct gymnosperm trees Coniferophyta: Order Cordaitales. The specimens were collected from the Sydney. Stellarton and Bay St. George subbasins of the once extensive Carboniferous Maritimes Basin of Atlantic Canada. Fourier transformation of infrared spectra (FTIR) and elemental
Authors
E.L. Zodrow, Maria Mastalerz, W. H. Orem, Z. Simunek, A.R. Bashforth
Mobilization of major inorganic ions during experimental diagenesis of characterized peats
Laboratory experiments were undertaken to study changes in concentrations of major inorganic ions during simulated burial of peats to about 1.5 km. Cladium, Rhizophora, and Cyrilla peats were first analyzed to determine cation distributions among fractions of the initial materials and minerals in residues from wet oxidation. Subsamples of the peats (80 g) were then subjected to increasing temperat
Authors
A.M. Bailey, A.D. Cohen, W. H. Orem, J.H. Blackson
Sources and haloacetic acid/trihalomethane formation potentials of aquatic humic substances in the Wakarusa River and Clinton Lake near Lawrence, Kansas
Gram quantities of aquatic humic substances (AHS) were extracted from the Wakarusa River−Clinton Lake Reservoir system, near Lawrence, KS, to support nuclear magnetic resonance (NMR) experimental studies, report concentrations of dissolved organic carbon (DOC) and AHS, define sources of the AHS, and determine if the AHS yield sufficient quantities of haloacetic acids (HAA5) and trihalomethanes (TH
Authors
M.L. Pomes, C.K. Larive, E.M. Thurman, W. R. Green, W. H. Orem, C.E. Rostad, T. B. Coplen, B.J. Cutak, A.M. Dixon
Geochemistry of Florida Bay sediments: Nutrient history at five sites in eastern and central Florida Bay
Recent seagrass dieoff and massive microalgal blooms have focused attention on the health of the Florida Bay ecosystem. Changes in nutrient input and the nutrient dynamics of Florida Bay are hypothesized to be linked to these problems, but crucial baseline information is still lacking. Efforts to restore Florida Bay to its natural condition will require information on the nutrient history of the b
Authors
W. H. Orem, C. W. Holmes, C. Kendall, H.E. Lerch, A. L. Bates, S. R. Silva, A. Boylan, M. Corum, M. Marot, C. Hedgman
A digital resource model of the Upper Pennsylvanian Pittsburgh coal bed, Monongahela Group, northern Appalachian basin coal region, USA
The U.S. Geological Survey is currently conducting a coal resource assessment of the coal beds and zones that are expected to provide the bulk of the Nation's coal resources for the next few decades. The Pittsburgh coal bed is the first bed in the northern and central Appalachian basin coal region to undergo a fully-digital assessment. The bed-specific assessment is being carried out in partnershi
Authors
L.F. Ruppert, S. J. Tewalt, L. J. Bragg, R.N. Wallack
Lanthanide, yttrium, and zirconium anomalies in the Fire Clay coal bed, Eastern Kentucky
The Fire Clay coal bed in the Central Appalachian basin region contains a laterally-persistent tonstein that is found in the coal throughout most of its areal extent. The tonstein contains an array of minerals, including sanidine, ??-quartz, anatase and euhedral zircon, thhat constitutes strong evidence for a volcanic origin of the parting. For this study, five samples of the tonstein and four set
Authors
J.C. Hower, L.F. Ruppert, C.F. Eble
DBP formation of aquatic humic substances
Terrestrial vegetation commonly shed into reservoirs contains chemical precursors of DBPs.Aquatic humic substances (AHSs) in water generate potentially harmful disinfection by‐products (DBPs) such as haloacetic acids (HAAs) and trihalomethanes (THMs) during chlorination. AHSs from two Arkansas reservoirs were characterized to define source, identify meta‐dihydroxybenzene (m‐DHB) structures as prob
Authors
M.L. Pomes, W. R. Green, E.M. Thurman, W. H. Orem, H.E. Lerch
Science and Products
Filter Total Items: 129
A geostatistical approach to predicting sulfur content in the Pittsburgh coal bed
The US Geological Survey (USGS) is completing a national assessment of coal resources in the five top coal-producing regions in the US. Point-located data provide measurements on coal thickness and sulfur content. The sample data and their geologic interpretation represent the most regionally complete and up-to-date assessment of what is known about top-producing US coal beds. The sample data are
Authors
W.D. Watson, L.F. Ruppert, L. J. Bragg, S. J. Tewalt
The Upper Pennsylvanian Pittsburgh coal bed: Resources and mine models
The U.S. Geological Survey recently completed a digital coal resource assessment model of the Upper Pennsylvanian Pittsburgh coal bed, which indicates that after subtracting mined-out coal, 16 billion short tons (14 billion tonnes) remain of the original 34 billion short tons (31 billion tonnes) of coal. When technical, environmental, and social restrictions are applied to the remaining Pittsburgh
Authors
W.D. Watson, L.F. Ruppert, S. J. Tewalt, L. J. Bragg
Regional geochemistry of metals in organic-rich sediments, sawgrass and surface water, from Taylor Slough, Florida
No abstract available.
Authors
L. P. Gough, R. K. Kotra, C. W. Holmes, W. H. Orem, P. L. Hageman, Paul H. Briggs, A. L. Meier, Z. A. Brown
Geochemistry of sulfur in the Florida Everglades: 1994 through 1999
In this report, we present data on the geochemistry of sulfur in sediments and in surface water, groundwater, and rainwater in the Everglades region in south Florida. The results presented here are part of a larger study intended to determine the roles played by the cycling of carbon, nitrogen, phosphorus, and sulfur in the ecology of the south Florida wetlands. The geochemistry of sulfur in the r
Authors
Anne L. Bates, W. H. Orem, J. W. Harvey, E.C. Spiker
Use of 234U and 238U isotopes to identify fertilizer-derived uranium in the Florida Everglades
Surface water and peat in the northern Everglades have very low natural concentrations of U and are therefore sensitive to the addition of small amounts of U from anthropogenic sources such as fertilizer. Peat samples collected along a nutrient gradient in the northern Everglades have unusually high concentrations of U (> 1 ??g/g, dry basis) and also have a distinctive 234U/238U activity ratio (AR
Authors
R. A. Zielinski, K. R. Simmons, W. H. Orem
Functional groups and elemental analyses of cuticular morphotypes of Cordaites principalis (Germar) Geinitz, Carboniferous Maritimes Basin, Canada
Well-preserved cuticles were isolated from Cordaites principalis (Germar) Geinitz leaf compressions, i.e., foliage from extinct gymnosperm trees Coniferophyta: Order Cordaitales. The specimens were collected from the Sydney. Stellarton and Bay St. George subbasins of the once extensive Carboniferous Maritimes Basin of Atlantic Canada. Fourier transformation of infrared spectra (FTIR) and elemental
Authors
E.L. Zodrow, Maria Mastalerz, W. H. Orem, Z. Simunek, A.R. Bashforth
Mobilization of major inorganic ions during experimental diagenesis of characterized peats
Laboratory experiments were undertaken to study changes in concentrations of major inorganic ions during simulated burial of peats to about 1.5 km. Cladium, Rhizophora, and Cyrilla peats were first analyzed to determine cation distributions among fractions of the initial materials and minerals in residues from wet oxidation. Subsamples of the peats (80 g) were then subjected to increasing temperat
Authors
A.M. Bailey, A.D. Cohen, W. H. Orem, J.H. Blackson
Sources and haloacetic acid/trihalomethane formation potentials of aquatic humic substances in the Wakarusa River and Clinton Lake near Lawrence, Kansas
Gram quantities of aquatic humic substances (AHS) were extracted from the Wakarusa River−Clinton Lake Reservoir system, near Lawrence, KS, to support nuclear magnetic resonance (NMR) experimental studies, report concentrations of dissolved organic carbon (DOC) and AHS, define sources of the AHS, and determine if the AHS yield sufficient quantities of haloacetic acids (HAA5) and trihalomethanes (TH
Authors
M.L. Pomes, C.K. Larive, E.M. Thurman, W. R. Green, W. H. Orem, C.E. Rostad, T. B. Coplen, B.J. Cutak, A.M. Dixon
Geochemistry of Florida Bay sediments: Nutrient history at five sites in eastern and central Florida Bay
Recent seagrass dieoff and massive microalgal blooms have focused attention on the health of the Florida Bay ecosystem. Changes in nutrient input and the nutrient dynamics of Florida Bay are hypothesized to be linked to these problems, but crucial baseline information is still lacking. Efforts to restore Florida Bay to its natural condition will require information on the nutrient history of the b
Authors
W. H. Orem, C. W. Holmes, C. Kendall, H.E. Lerch, A. L. Bates, S. R. Silva, A. Boylan, M. Corum, M. Marot, C. Hedgman
A digital resource model of the Upper Pennsylvanian Pittsburgh coal bed, Monongahela Group, northern Appalachian basin coal region, USA
The U.S. Geological Survey is currently conducting a coal resource assessment of the coal beds and zones that are expected to provide the bulk of the Nation's coal resources for the next few decades. The Pittsburgh coal bed is the first bed in the northern and central Appalachian basin coal region to undergo a fully-digital assessment. The bed-specific assessment is being carried out in partnershi
Authors
L.F. Ruppert, S. J. Tewalt, L. J. Bragg, R.N. Wallack
Lanthanide, yttrium, and zirconium anomalies in the Fire Clay coal bed, Eastern Kentucky
The Fire Clay coal bed in the Central Appalachian basin region contains a laterally-persistent tonstein that is found in the coal throughout most of its areal extent. The tonstein contains an array of minerals, including sanidine, ??-quartz, anatase and euhedral zircon, thhat constitutes strong evidence for a volcanic origin of the parting. For this study, five samples of the tonstein and four set
Authors
J.C. Hower, L.F. Ruppert, C.F. Eble
DBP formation of aquatic humic substances
Terrestrial vegetation commonly shed into reservoirs contains chemical precursors of DBPs.Aquatic humic substances (AHSs) in water generate potentially harmful disinfection by‐products (DBPs) such as haloacetic acids (HAAs) and trihalomethanes (THMs) during chlorination. AHSs from two Arkansas reservoirs were characterized to define source, identify meta‐dihydroxybenzene (m‐DHB) structures as prob
Authors
M.L. Pomes, W. R. Green, E.M. Thurman, W. H. Orem, H.E. Lerch