Paul M Bradley
Introduction: Research Hydrologist/Ecologist with the South Atlantic Water Science Center focused on understanding environmental contaminant mixture exposures and real versus perceived effects to human and environmental health.
Paul is project lead, along with Kelly Smalling, of the Drinking-Water and Wastewater Infrastructure Integrated Science Team of the Ecosystems Mission, Environmental Health Program. His research focuses on human exposures to and potential effects of inorganic, organic, and microbial contaminant mixtures in drinking water at the point of use and on anthropogenic contaminant mixtures as ecosystem stressors.
Professional Experience
1988–present: Research Ecologist/Hydrologist, U.S. Geological Survey
Expertise:
• Contaminant mixtures
• Drinking water
• Water quality
• Environmental health
Education and Certifications
B.S., Applied Biology, Georgia Institute of Technology, Atlanta, Georgia
M.S., Applied Biology, Georgia Institute of Technology, Atlanta, Georgia
Ph.D., Physiological Ecology, University of South Carolina, Columbia, South Carolina
Science and Products
Enhanced dichloroethene biodegradation in fractured rock under biostimulated and bioaugmented conditions
Spatial patterns of mercury in macroinvertebrates and fishes from streams of contrasting forested landscapes in the eastern United States
Spatial and seasonal variability of dissolved methylmercury in two stream basins in the Eastern United States
Microbial mineralization of dichloroethene and vinyl chloride under hypoxic conditions
Reinterpreting the importance of oxygen-based biodegradation in chloroethene-contaminated groundwater
Evolution of redox processes in groundwater
Limnological Conditions and Occurrence of Taste-and-Odor Compounds in Lake William C. Bowen and Municipal Reservoir #1, Spartanburg County, South Carolina, 2006-2009
Trace element, semivolatile organic, and chlorinated organic compound concentrations in bed sediments of selected streams at Fort Gordon, Georgia, February-April 2010
Concentrations, loads, and yields of nutrients and suspended sediment in the South Pacolet, North Pacolet, and Pacolet Rivers, northern South Carolina and southwestern North Carolina, October 2005 to September 2009
Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
Simulation of streamflow in the McTier Creek watershed, South Carolina
Harmful algal blooms: A case study in two mesotrophic drinking water supply reservoirs in South Carolina
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Enhanced dichloroethene biodegradation in fractured rock under biostimulated and bioaugmented conditions
Significant microbial reductive dechlorination of [1,2 14C] cis-dichloroethene (DCE) was observed in anoxic microcosms prepared with unamended, fractured rock aquifer materials, which were colonized in situ at multiple depths in two boreholes at the Naval Air Warfare Center (NAWC) in West Trenton, New Jersey. The lack of significant reductive dechlorination in corresponding water-only treatments iAuthorsPaul M. Bradley, Celeste A. Journey, Julie D. Kirshtein, Mary A. Voytek, Pierre J. Lacombe, Thomas E. Imbrigiotta, Francis H. Chapelle, Claire R. Tiedeman, Daniel J. GoodeSpatial patterns of mercury in macroinvertebrates and fishes from streams of contrasting forested landscapes in the eastern United States
Controls on mercury bioaccumulation in lotic ecosystems are not well understood. During 2007–2009, we studied mercury and stable isotope spatial patterns of macroinvertebrates and fishes from two medium-sized (AuthorsKaren Riva-Murray, Lia C. Chasar, Paul M. Bradley, Douglas A. Burns, Mark E. Brigham, Martyn J. Smith, Thomas A. AbrahamsenSpatial and seasonal variability of dissolved methylmercury in two stream basins in the Eastern United States
We assessed methylmercury (MeHg) concentrations across multiple ecological scales in the Edisto (South Carolina) and Upper Hudson (New York) River basins. Out-of-channel wetland/floodplain environments were primary sources of filtered MeHg (F-MeHg) to the stream habitat in both systems. Shallow, open-water areas in both basins exhibited low F-MeHg concentrations and decreasing F-MeHg mass flux. DoAuthorsPaul M. Bradley, Douglas A. Burns, Karen Riva-Murray, Mark E. Brigham, Daniel T. Button, Lia C. Chasar, Mark Marvin-DiPasquale, Mark A. Lowery, Celeste A. JourneyMicrobial mineralization of dichloroethene and vinyl chloride under hypoxic conditions
Mineralization of 14C-radiolabled vinyl chloride ([1,2-14C] VC) and cis-dichloroethene ([1,2-14C] cis-DCE) under hypoxic (initial dissolved oxygen (DO) concentrations about 0.1 mg/L) and nominally anoxic (DO minimum detection limit = 0.01 mg/L) was examined in chloroethene-exposed sediments from two groundwater and two surface water sites. The results show significant VC and dichloroethene (DCE) mAuthorsPaul M. Bradley, Francis H. ChapelleReinterpreting the importance of oxygen-based biodegradation in chloroethene-contaminated groundwater
Chlororespiration is common in shallow aquifer systems under conditions nominally identified as anoxic. Consequently, chlororespiration is a key component of remediation at many chloroethene-contaminated sites. In some instances, limited accumulation of reductive dechlorination daughter products is interpreted as evidence that natural attenuation is not adequate for site remediation. This conclusiAuthorsPaul M. BradleyEvolution of redox processes in groundwater
No abstract available.AuthorsPeter B. McMahon, Francis H. Chapelle, Paul M. BradleyLimnological Conditions and Occurrence of Taste-and-Odor Compounds in Lake William C. Bowen and Municipal Reservoir #1, Spartanburg County, South Carolina, 2006-2009
Limnological conditions and the occurrence of taste-and-odor compounds were studied in two reservoirs in Spartanburg County, South Carolina, from May 2006 to June 2009. Lake William C. Bowen and Municipal Reservoir #1 are relatively shallow, meso-eutrophic, warm monomictic, cascading impoundments on the South Pacolet River. Overall, water-quality conditions and phytoplankton community assemblagesAuthorsCeleste A. Journey, Jane M. Arrington, Karen M. Beaulieu, Jennifer L. Graham, Paul M. BradleyTrace element, semivolatile organic, and chlorinated organic compound concentrations in bed sediments of selected streams at Fort Gordon, Georgia, February-April 2010
A spatial survey of streams was conducted from February to April 2010 to assess the concentrations of major ions, selected trace elements, semivolatile organic compounds, organochlorine pesticides, and polychlorinated biphenyls associated with the bed sediments of surface waters at Fort Gordon military installation near Augusta, Georgia. This investigation expanded a previous study conducted in MaAuthorsLashun K. Thomas, Celeste A. Journey, Whitney J. Stringfield, Jimmy M. Clark, Paul M. Bradley, John B. Wellborn, Hagan Ratliff, Thomas A. AbrahamsenConcentrations, loads, and yields of nutrients and suspended sediment in the South Pacolet, North Pacolet, and Pacolet Rivers, northern South Carolina and southwestern North Carolina, October 2005 to September 2009
The U.S. Geological Survey, in cooperation with Spartanburg Water, evaluated the concentrations, loads, and yields of suspended sediment, dissolved ammonia, dissolved nitrate plus nitrite, total organic nitrogen, total nitrogen, dissolved orthophosphate, dissolved phosphorus, and total phosphorus at sites in the South Pacolet, North Pacolet, and Pacolet Rivers in northern South Carolina and southwAuthorsCeleste A. Journey, Andral W. Caldwell, Toby D. Feaster, Mattew D. Petkewich, Paul M. BradleyEnvironmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
This report summarizes the environmental settings of streams in New York and South Carolina, where the U.S. Geological Survey completed detailed investigations during 2005-09 into factors contributing to mercury bioaccumulation in top-predator fish and other stream organisms. Descriptions of location, land use/land cover, climate, precipitation, atmospheric deposition, hydrology, water temperatureAuthorsBarbara C. Scudder Eikenberry, Karen Riva-Murray, Martyn J. Smith, Paul M. Bradley, Daniel T. Button, Jimmy M. Clark, Douglas A. Burns, Celeste A. JourneySimulation of streamflow in the McTier Creek watershed, South Carolina
The McTier Creek watershed is located in the Sand Hills ecoregion of South Carolina and is a small catchment within the Edisto River Basin. Two watershed hydrology models were applied to the McTier Creek watershed as part of a larger scientific investigation to expand the understanding of relations among hydrologic, geochemical, and ecological processes that affect fish-tissue mercury concentratioAuthorsToby D. Feaster, Heather E. Golden, Kenneth R. Odom, Mark A. Lowery, Paul Conrads, Paul M. BradleyHarmful algal blooms: A case study in two mesotrophic drinking water supply reservoirs in South Carolina
Algal blooms can be harmful and a nuisance in a variety of aquatic ecosystems, including reservoirs and lakes. Cyanobacterial(blue-green algae) harmful algal blooms are notorious for producing both taste-and-odor compounds and potent toxins that may affect human health. Taste–and-odor episodes are aesthetic problems often caused by cyanobacterial-produced organic compounds (geosmin and methylisoboAuthorsCeleste A. Journey, Karen M. Beaulieu, Rodney R. Knight, Jennifer L. Graham, Jane M. Arrington, Rebecca West, John Westcott, Paul M. Bradley - Web Tools
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