Biologist
Email:
crharris@usgs.gov
Office Phone:
703-648-5487
Location
12201 Sunrise Valley Drive
Reston
, VA
20192-0002
US
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Water resources around the world are contaminated with per- and polyfluoroalkyl substances (PFAS) due to releases from point sources on military installations, fire training centers, and chemical manufacturing sites. Non-point sources have also been identified including wastewater effluent, landfills, and biosolids application. PFAS are a major concern to myriad stakeholders as some are known to bioaccumulate, they have eco-toxicity effects, and they are highly recalcitrant. PFAS are often called “forever chemicals” due to their environmental persistence but many precursor PFAS are transformed in the environment by microbes. Recent work has shown that PFAS can be biologically degraded in laboratory studies, but...
Categories: Data;
Tags: Barnstable County,
Cape Cod,
DNA sequencing,
Environmental Health,
Hydrology, All tags...
Massachusetts,
PFAS,
USGS Science Data Catalog (SDC),
Water Quality,
biodegradation,
biota,
environment,
laboratory experiments,
microbes,
microbiology,
time series analysis,
time series datasets, Fewer tags
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Anaerobic microcosm experiments were conducted in April-May 2018 with PFAS-contaminated soil from a U.S. Army installation (Fort Drum, New York) and simulated groundwater. All microcosms, except for a live sediment control, were amended with perfluorooctanesulfonate (PFOS), perfluorooctanoate (PFOA), and 6:2 fluorotelomer sulfonate (6:2 FtS). Replicate treatments were prepared with and without bioaugmentation with the WBC-2 dehalogenating culture and with and without addition of chlorinated volatile organic compounds (1,1,2,2-tetrachloroethane and trichloroethylene). Two additional treatments were prepared containing granular activated carbon. All microcosms were prepared in duplicate and sacrificed for sampling....
Categories: Data;
Tags: Environmental Health,
Fort Drum,
Genetics,
Jefferson County,
New York, All tags...
New York,
PFAS,
USGS Science Data Catalog (SDC),
Water Quality,
bacteria,
bacteria,
bacterial digestion of pollutants,
biodegradation,
biogeochemical cycling,
biological laboratory methods,
environment,
laboratory experiments,
reductive dehalogenation,
sediment-pollutant interaction, Fewer tags
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Oil and gas (OG) wastewaters are commonly disposed of by underground injection and previous research showed that activities at a disposal facility in West Virginia affected stream biogeochemistry and sediment microbial communities downstream from the facility. Microorganisms can control the fate and transport of organic and inorganic components of OG wastewater highlighting the need to characterize the effects of OG wastewater components on microbial activity. We conducted a series of aerobic microcosm experiments to assess the influence of high total dissolved solids (TDS) and hydraulic fracturing fluid additives (2,2-dibromo-3-nitrilopropionamide (DBNPA), a biocide, and ethylene glycol, an anti-scaling additive),...
Categories: Data;
Tags: Biochemistry,
DNA sequencing,
Energy Resources,
Environmental Health,
Fayette County, All tags...
Geochemistry,
Microbiology,
USGS Science Data Catalog (SDC),
West Virginia,
Wolf Creek,
archaea,
bacteria,
chromatography,
gas chromatography,
geochemical processes,
geochemistry,
hydraulic fracturing,
laboratory experiments,
liquid chromatography,
microbes,
molecular biology,
sediments,
subsampling,
time series datasets, Fewer tags
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Soil, soil porewater, groundwater, and playa lake sediment samples were collected between September 2021 and November 2023 at Cannon Air Force Base (CAFB) in eastern New Mexico as part of a study on the sources, fate, and transport of per- and polyfluoroalkyl substances (PFAS). Soil cores (2-foot-long) were collected in September 2021 from six sites that were potential PFAS source areas and one background site. Soil cores were analyzed for targeted PFAS compounds, total oxidizable precursor (TOP) assay, protein content, anions, total organic and inorganic carbon, cation exchange capacity, and pH. Physical properties, which included soil particle size distribution, oxide composition, moisture content, and water potential...
Categories: Data;
Tags: Cannon Air Force Base,
Eastern New Mexico,
Geochemistry,
Hydrology,
New Mexico, All tags...
PFAS,
USGS Science Data Catalog (SDC),
Water Quality,
chemical analysis,
contamination and pollution,
core analysis,
dissolved gases,
dissolved metals,
elements,
environment,
field sampling,
geochemistry,
grain-size analysis,
health,
laboratory methods,
microbiology,
nutrient content (water),
organisms,
push coring,
soil chemistry,
subsampling,
water chemistry,
water sampling, Fewer tags
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