James L Gray, PhD
James Gray is a Research Chemist for the USGS Water Resources Mission Area.
Science and Products
Filter Total Items: 45
Demasculinization of male fish by wastewater treatment plant effluent
Adult male fathead minnows (Pimephales promelas) were exposed to effluent from the City of Boulder, Colorado wastewater treatment plant (WWTP) under controlled conditions in the field to determine if the effluent induced reproductive disruption in fish. Gonadal intersex and other evidence of reproductive disruption were previously identified in white suckers (Catostomus commersoni) in Boulder Cree
Authors
A.M. Vajda, Larry B. Barber, James L. Gray, E.M. Lopez, A.M. Bolden, H.L. Schoenfuss, D.O. Norris
Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants
A primary pathway for emerging contaminants (pharmaceuticals, personal care products, steroids, and hormones) to enter aquatic ecosystems is effluent from sewage treatment plants (STP), and identifying technologies to minimize the amount of these contaminants released is important. Quantifying the flux of these contaminants through STPs is difficult. This study evaluates the behavior of gadolinium
Authors
Philip L. Verplanck, Edward T. Furlong, James L. Gray, Patrick J. Phillips, Ruth E. Wolf, Kathleen Esposito
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 estrogenicity (meas
Authors
Edward T. Furlong, James L. Gray, David M. Quanrud, S.E. Teske, K.J. Esposito, Jeremy Marine, Wendell P. Ela, Patrick J. Phillips, Dana W. Kolpin, B. Stinson
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 spill releas
Authors
Ben Place, Brian Anderson, Abdou Mekebri, Edward T. Furlong, James L. Gray, Ron Tjeerdema, Jennifer Field
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. Upstream se
Authors
Paul M. Bradley, Larry B. Barber, Francis H. Chapelle, James L. Gray, Dana W. Kolpin, Peter B. McMahon
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 consistent
Authors
A.M. Vajda, Larry B. Barber, James L. Gray, E.M. Lopez, John D. 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
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 storm-runof
Authors
Steven K. Sando, Edward T. Furlong, James L. Gray, Michael T. Meyer
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 hormone an
Authors
J.L. Gray, D.L. Sedlak
Occurrence of organic wastewater compounds in wastewater effluent and the Big Sioux River in the Upper Big Sioux River basin, South Dakota, 2003-2004
No abstract available.
Authors
Steven K. Sando, Edward T. Furlong, James L. Gray, Michael T. Meyer, Roy C. Bartholomay
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: 45
Demasculinization of male fish by wastewater treatment plant effluent
Adult male fathead minnows (Pimephales promelas) were exposed to effluent from the City of Boulder, Colorado wastewater treatment plant (WWTP) under controlled conditions in the field to determine if the effluent induced reproductive disruption in fish. Gonadal intersex and other evidence of reproductive disruption were previously identified in white suckers (Catostomus commersoni) in Boulder Cree
Authors
A.M. Vajda, Larry B. Barber, James L. Gray, E.M. Lopez, A.M. Bolden, H.L. Schoenfuss, D.O. Norris
Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants
A primary pathway for emerging contaminants (pharmaceuticals, personal care products, steroids, and hormones) to enter aquatic ecosystems is effluent from sewage treatment plants (STP), and identifying technologies to minimize the amount of these contaminants released is important. Quantifying the flux of these contaminants through STPs is difficult. This study evaluates the behavior of gadolinium
Authors
Philip L. Verplanck, Edward T. Furlong, James L. Gray, Patrick J. Phillips, Ruth E. Wolf, Kathleen Esposito
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 estrogenicity (meas
Authors
Edward T. Furlong, James L. Gray, David M. Quanrud, S.E. Teske, K.J. Esposito, Jeremy Marine, Wendell P. Ela, Patrick J. Phillips, Dana W. Kolpin, B. Stinson
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 spill releas
Authors
Ben Place, Brian Anderson, Abdou Mekebri, Edward T. Furlong, James L. Gray, Ron Tjeerdema, Jennifer Field
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. Upstream se
Authors
Paul M. Bradley, Larry B. Barber, Francis H. Chapelle, James L. Gray, Dana W. Kolpin, Peter B. McMahon
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 consistent
Authors
A.M. Vajda, Larry B. Barber, James L. Gray, E.M. Lopez, John D. 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
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 storm-runof
Authors
Steven K. Sando, Edward T. Furlong, James L. Gray, Michael T. Meyer
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 hormone an
Authors
J.L. Gray, D.L. Sedlak
Occurrence of organic wastewater compounds in wastewater effluent and the Big Sioux River in the Upper Big Sioux River basin, South Dakota, 2003-2004
No abstract available.
Authors
Steven K. Sando, Edward T. Furlong, James L. Gray, Michael T. Meyer, Roy C. Bartholomay
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.