James L Gray, PhD
James Gray is a Research Chemist for the USGS Water Resources Mission Area.
Science and Products
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Fate of estrogenic compounds during municipal sludge stabilization and dewatering Fate of estrogenic compounds during municipal sludge stabilization and dewatering
This project brought together a team of experts in the fields of environmental engineering, analytical chemistry and hydrogeology, and biological assay analysis to evaluate the occurrence and fate of estrogenic compounds and the estrogenicity of biosolids derived from wastewater treatment. The primary objective of the study was to provide key baseline information concerning the...
Authors
Edward Furlong, James L. Gray, David Quanrud, S.E. Teske, K.J. Esposito, Jeremy Marine, Wendell Ela, Patrick Phillips, Dana Kolpin, B. Stinson
A role for analytical chemistry in advancing our understanding of the occurrence, fate, and effects of Corexit Oil Dispersants A role for analytical chemistry in advancing our understanding of the occurrence, fate, and effects of Corexit Oil Dispersants
On April 24, 2010, the sinking of the Deepwater Horizon oil rig resulted in the release of oil into the Gulf of Mexico. As of July 19, 2010, the federal government's Deepwater Horizon Incident Joint Information Center estimates the cumulative range of oil released is 3,067,000 to 5,258,000 barrels, with a relief well to be completed in early August. By comparison, the Exxon Valdez oil...
Authors
Ben Place, Brian Anderson, Abdou Mekebri, Edward Furlong, James Gray, Ron Tjeerdema, Jennifer Field
Biodegradation of 17β-estradiol, estrone and testosterone in stream sediments Biodegradation of 17β-estradiol, estrone and testosterone in stream sediments
Biodegradation of 17β-estradiol (E2), estrone (E1), and testosterone (T) was investigated in three wastewater treatment plant (WWTP) affected streams in the United States. Relative differences in the mineralization of [4-14C] substrates were assessed in oxic microcosms containing saturated sediment or water-only from locations upstream and downstream of the WWTP outfall in each system...
Authors
Paul Bradley, Larry Barber, Francis Chapelle, James Gray, Dana Kolpin, Peter McMahon
Reproductive disruption in fish downstream from an estrogenic wastewater effluent Reproductive disruption in fish downstream from an estrogenic wastewater effluent
To assess the impact of an estrogenic wastewater treatment plant (WWTP) effluent on fish reproduction, white suckers (Catostomus commersoni) were collected from immediately upstream and downstream (effluent site) of the city of Boulder, CO, WWTP outfall. Gonadal intersex, altered sex ratios, reduced gonad size, disrupted ovarian and testicular histopathology, and vitellogenin induction...
Authors
A.M. Vajda, Larry Barber, James Gray, E.M. Lopez, John Woodling, David O. Norris
Occurrence of organic wastewater compounds in drinking water, wastewater effluent, and the Big Sioux River in or near Sioux Falls, South Dakota, 2001-2004 Occurrence of organic wastewater compounds in drinking water, wastewater effluent, and the Big Sioux River in or near Sioux Falls, South Dakota, 2001-2004
The U.S. Geological Survey (USGS) in cooperation with the city of Sioux Falls conducted several rounds of sampling to determine the occurrence of organic wastewater compounds (OWCs) in the city of Sioux Falls drinking water and waste-water effluent, and the Big Sioux River in or near Sioux Falls during August 2001 through May 2004. Water samples were collected during both base-flow and...
Authors
Steven Sando, Edward Furlong, James Gray, Michael Meyer
The fate of estrogenic hormones in an engineered treatment wetland with dense macrophytes The fate of estrogenic hormones in an engineered treatment wetland with dense macrophytes
Recently, the estrogenic hormones 17??-estradiol (E2) and 17??-ethinyl estradiol (EE2) have been detected in municipal wastewater effluent and surface waters at concentrations sufficient to cause feminization of male fish. To evaluate the fate of steroid hormones in an engineered treatment wetland, lithium chloride, E2, and EE 2 were added to a treatment wetland test cell. Comparison of...
Authors
J.L. Gray, D.L. Sedlak
Non-USGS Publications**
Kolodziej, E. P., Gray, J. L., & Sedlak, D. L. (2003). Quantification Of Steroid Hormones With Pheromonal Properties In Municipal Wastewater Effluent. Environmental Toxicology and Chemistry, 22(11), 2622. doi:10.1897/03-42
Sedlak, D. L., Pinkston, K. E., Gray, J. L., & Kolodziej, E. P. (2003). Approaches for Quantifying the Attenuation of Wastewater-Derived Contaminants in the Aquatic Environment. CHIMIA International Journal for Chemistry, 57(9), 567-569. doi:10.2533/000942903777679055
Sedlak, D. L., Gray, J. L., & Pinkston, K. E. (2000). Peer Reviewed: Understanding Microcontaminants in Recycled Water. Environmental Science & Technology, 34(23). doi:10.1021/es003513e
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 20
No Result Found
Filter Total Items: 49
Fate of estrogenic compounds during municipal sludge stabilization and dewatering Fate of estrogenic compounds during municipal sludge stabilization and dewatering
This project brought together a team of experts in the fields of environmental engineering, analytical chemistry and hydrogeology, and biological assay analysis to evaluate the occurrence and fate of estrogenic compounds and the estrogenicity of biosolids derived from wastewater treatment. The primary objective of the study was to provide key baseline information concerning the...
Authors
Edward Furlong, James L. Gray, David Quanrud, S.E. Teske, K.J. Esposito, Jeremy Marine, Wendell Ela, Patrick Phillips, Dana Kolpin, B. Stinson
A role for analytical chemistry in advancing our understanding of the occurrence, fate, and effects of Corexit Oil Dispersants A role for analytical chemistry in advancing our understanding of the occurrence, fate, and effects of Corexit Oil Dispersants
On April 24, 2010, the sinking of the Deepwater Horizon oil rig resulted in the release of oil into the Gulf of Mexico. As of July 19, 2010, the federal government's Deepwater Horizon Incident Joint Information Center estimates the cumulative range of oil released is 3,067,000 to 5,258,000 barrels, with a relief well to be completed in early August. By comparison, the Exxon Valdez oil...
Authors
Ben Place, Brian Anderson, Abdou Mekebri, Edward Furlong, James Gray, Ron Tjeerdema, Jennifer Field
Biodegradation of 17β-estradiol, estrone and testosterone in stream sediments Biodegradation of 17β-estradiol, estrone and testosterone in stream sediments
Biodegradation of 17β-estradiol (E2), estrone (E1), and testosterone (T) was investigated in three wastewater treatment plant (WWTP) affected streams in the United States. Relative differences in the mineralization of [4-14C] substrates were assessed in oxic microcosms containing saturated sediment or water-only from locations upstream and downstream of the WWTP outfall in each system...
Authors
Paul Bradley, Larry Barber, Francis Chapelle, James Gray, Dana Kolpin, Peter McMahon
Reproductive disruption in fish downstream from an estrogenic wastewater effluent Reproductive disruption in fish downstream from an estrogenic wastewater effluent
To assess the impact of an estrogenic wastewater treatment plant (WWTP) effluent on fish reproduction, white suckers (Catostomus commersoni) were collected from immediately upstream and downstream (effluent site) of the city of Boulder, CO, WWTP outfall. Gonadal intersex, altered sex ratios, reduced gonad size, disrupted ovarian and testicular histopathology, and vitellogenin induction...
Authors
A.M. Vajda, Larry Barber, James Gray, E.M. Lopez, John Woodling, David O. Norris
Occurrence of organic wastewater compounds in drinking water, wastewater effluent, and the Big Sioux River in or near Sioux Falls, South Dakota, 2001-2004 Occurrence of organic wastewater compounds in drinking water, wastewater effluent, and the Big Sioux River in or near Sioux Falls, South Dakota, 2001-2004
The U.S. Geological Survey (USGS) in cooperation with the city of Sioux Falls conducted several rounds of sampling to determine the occurrence of organic wastewater compounds (OWCs) in the city of Sioux Falls drinking water and waste-water effluent, and the Big Sioux River in or near Sioux Falls during August 2001 through May 2004. Water samples were collected during both base-flow and...
Authors
Steven Sando, Edward Furlong, James Gray, Michael Meyer
The fate of estrogenic hormones in an engineered treatment wetland with dense macrophytes The fate of estrogenic hormones in an engineered treatment wetland with dense macrophytes
Recently, the estrogenic hormones 17??-estradiol (E2) and 17??-ethinyl estradiol (EE2) have been detected in municipal wastewater effluent and surface waters at concentrations sufficient to cause feminization of male fish. To evaluate the fate of steroid hormones in an engineered treatment wetland, lithium chloride, E2, and EE 2 were added to a treatment wetland test cell. Comparison of...
Authors
J.L. Gray, D.L. Sedlak
Non-USGS Publications**
Kolodziej, E. P., Gray, J. L., & Sedlak, D. L. (2003). Quantification Of Steroid Hormones With Pheromonal Properties In Municipal Wastewater Effluent. Environmental Toxicology and Chemistry, 22(11), 2622. doi:10.1897/03-42
Sedlak, D. L., Pinkston, K. E., Gray, J. L., & Kolodziej, E. P. (2003). Approaches for Quantifying the Attenuation of Wastewater-Derived Contaminants in the Aquatic Environment. CHIMIA International Journal for Chemistry, 57(9), 567-569. doi:10.2533/000942903777679055
Sedlak, D. L., Gray, J. L., & Pinkston, K. E. (2000). Peer Reviewed: Understanding Microcontaminants in Recycled Water. Environmental Science & Technology, 34(23). doi:10.1021/es003513e
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.