William H. Orem, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 130
Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations
Water and sediment extracts samples were analyzed for extractable hydrocarbons by gas chromatography/mass spectrometry (GC/MS) using an Agilent (Agilent Technologies, Palo Alto, CA, USA) 7890 series GC and 5975 electron ionization (EI) mass selective detector (MSD) operated in scan mode. Agilent ChemStation software was used for data acquisition and analysis (version E.02.00.493 on GC/MS...
Authors
William H. Orem, Matthew S. Varonka, Lynn M. Crosby, Karl B. Haase, Keith A. Loftin, Michelle L. Hladik, Denise M. Akob, Calin Tatu, Adam C. Mumford, Jeanne B. Jaeschke, Anne L. Bates, Tiffani Schell, Isabelle M. Cozzarelli
Changes in microbial communities and associated water and gas geochemistry across a sulfate gradient in coal beds: Powder River Basin, USA Changes in microbial communities and associated water and gas geochemistry across a sulfate gradient in coal beds: Powder River Basin, USA
Competition between microbial sulfate reduction and methanogenesis drives cycling of fossil carbon and generation of CH4 in sedimentary basins. However, little is understood about the fundamental relationship between subsurface aqueous geochemistry and microbiology that drives these processes. Here we relate elemental and isotopic geochemistry of coal-associated water and gas to the...
Authors
Hannah Schweitzer, Daniel Ritter, Jennifer McIntosh, Elliott Barnhart, Alfred B. Cunningham, David Vinson, William H. Orem, Matthew W. Fields
DDT and related compounds in pore water of shallow sediments on the Palos Verdes Shelf, California, USA DDT and related compounds in pore water of shallow sediments on the Palos Verdes Shelf, California, USA
For nearly two and a half decades following World War II, production wastes from the world's largest manufacturer of technical DDT (1-chloro-4-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene) were discharged into sewers of Los Angeles County. Following treatment, the wastes were released via a submarine outfall system to nearshore coastal waters where a portion accumulated in shallow...
Authors
Robert P. Eganhouse, Erica L. DiFilippo, James Pontolillo, William H. Orem, Paul C. Hackley, Brian Edwards
Spatial dependence of reduced sulfur in Everglades dissolved organic matter controlled by sulfate enrichment Spatial dependence of reduced sulfur in Everglades dissolved organic matter controlled by sulfate enrichment
Sulfate inputs to the Florida Everglades stimulate sulfidic conditions in freshwater wetland sediments that affect ecological and biogeochemical processes. An unexplored implication of sulfate enrichment is alteration of the content and speciation of sulfur in dissolved organic matter (DOM), which influences the reactivity of DOM with trace metals. Here, we describe the vertical and...
Authors
Brett A. Poulin, Joseph N. Ryan, Kathryn L. Nagy, Aron Stubbins, Thorsten Dittmar, William H. Orem, David P. Krabbenhoft, George R. Aiken
Geogenic organic contaminants in the low-rank coal-bearing Carrizo-Wilcox aquifer of East Texas, USA Geogenic organic contaminants in the low-rank coal-bearing Carrizo-Wilcox aquifer of East Texas, USA
The organic composition of groundwater along the Carrizo-Wilcox aquifer in East Texas (USA), sampled from rural wells in May and September 2015, was examined as part of a larger study of the potential health and environmental effects of organic compounds derived from low-rank coals. The quality of water from the low-rank coal-bearing Carrizo-Wilcox aquifer is a potential environmental...
Authors
Jayeeta Chakraborty, Matthew S. Varonka, William H. Orem, Robert B. Finkelman, William Manton
Final synthesis report for factors controlling DDE dechlorination rates on the palos verdes shelf: A field and laboratory investigation Final synthesis report for factors controlling DDE dechlorination rates on the palos verdes shelf: A field and laboratory investigation
This project was organized into separate field and laboratory studies aimed at answering “18 questions” in the original Scope of Work (cf., section 2 of this report, Background, for explanation). Because of some early results, certain questions became irrelevant and were, therefore, not pursued. In other cases, there simply was not enough time to complete the originally planned studies...
Authors
Robert P. Eganhouse, William H. Orem, Martin Reinhard
Science and Products
Filter Total Items: 130
Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations
Water and sediment extracts samples were analyzed for extractable hydrocarbons by gas chromatography/mass spectrometry (GC/MS) using an Agilent (Agilent Technologies, Palo Alto, CA, USA) 7890 series GC and 5975 electron ionization (EI) mass selective detector (MSD) operated in scan mode. Agilent ChemStation software was used for data acquisition and analysis (version E.02.00.493 on GC/MS...
Authors
William H. Orem, Matthew S. Varonka, Lynn M. Crosby, Karl B. Haase, Keith A. Loftin, Michelle L. Hladik, Denise M. Akob, Calin Tatu, Adam C. Mumford, Jeanne B. Jaeschke, Anne L. Bates, Tiffani Schell, Isabelle M. Cozzarelli
Changes in microbial communities and associated water and gas geochemistry across a sulfate gradient in coal beds: Powder River Basin, USA Changes in microbial communities and associated water and gas geochemistry across a sulfate gradient in coal beds: Powder River Basin, USA
Competition between microbial sulfate reduction and methanogenesis drives cycling of fossil carbon and generation of CH4 in sedimentary basins. However, little is understood about the fundamental relationship between subsurface aqueous geochemistry and microbiology that drives these processes. Here we relate elemental and isotopic geochemistry of coal-associated water and gas to the...
Authors
Hannah Schweitzer, Daniel Ritter, Jennifer McIntosh, Elliott Barnhart, Alfred B. Cunningham, David Vinson, William H. Orem, Matthew W. Fields
DDT and related compounds in pore water of shallow sediments on the Palos Verdes Shelf, California, USA DDT and related compounds in pore water of shallow sediments on the Palos Verdes Shelf, California, USA
For nearly two and a half decades following World War II, production wastes from the world's largest manufacturer of technical DDT (1-chloro-4-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene) were discharged into sewers of Los Angeles County. Following treatment, the wastes were released via a submarine outfall system to nearshore coastal waters where a portion accumulated in shallow...
Authors
Robert P. Eganhouse, Erica L. DiFilippo, James Pontolillo, William H. Orem, Paul C. Hackley, Brian Edwards
Spatial dependence of reduced sulfur in Everglades dissolved organic matter controlled by sulfate enrichment Spatial dependence of reduced sulfur in Everglades dissolved organic matter controlled by sulfate enrichment
Sulfate inputs to the Florida Everglades stimulate sulfidic conditions in freshwater wetland sediments that affect ecological and biogeochemical processes. An unexplored implication of sulfate enrichment is alteration of the content and speciation of sulfur in dissolved organic matter (DOM), which influences the reactivity of DOM with trace metals. Here, we describe the vertical and...
Authors
Brett A. Poulin, Joseph N. Ryan, Kathryn L. Nagy, Aron Stubbins, Thorsten Dittmar, William H. Orem, David P. Krabbenhoft, George R. Aiken
Geogenic organic contaminants in the low-rank coal-bearing Carrizo-Wilcox aquifer of East Texas, USA Geogenic organic contaminants in the low-rank coal-bearing Carrizo-Wilcox aquifer of East Texas, USA
The organic composition of groundwater along the Carrizo-Wilcox aquifer in East Texas (USA), sampled from rural wells in May and September 2015, was examined as part of a larger study of the potential health and environmental effects of organic compounds derived from low-rank coals. The quality of water from the low-rank coal-bearing Carrizo-Wilcox aquifer is a potential environmental...
Authors
Jayeeta Chakraborty, Matthew S. Varonka, William H. Orem, Robert B. Finkelman, William Manton
Final synthesis report for factors controlling DDE dechlorination rates on the palos verdes shelf: A field and laboratory investigation Final synthesis report for factors controlling DDE dechlorination rates on the palos verdes shelf: A field and laboratory investigation
This project was organized into separate field and laboratory studies aimed at answering “18 questions” in the original Scope of Work (cf., section 2 of this report, Background, for explanation). Because of some early results, certain questions became irrelevant and were, therefore, not pursued. In other cases, there simply was not enough time to complete the originally planned studies...
Authors
Robert P. Eganhouse, William H. Orem, Martin Reinhard