title: Elevated levels of perfluoroalkyl substances in estuarine sediments of Charleston, SC.
abstract: Urban areas are sources of perfluoroalkyl substances (PFASs) in the environment, although little is known about specific point sources and distribution of PFASs. Sentinel species, like bottlenose dolphins, are important indicators of environmental perturbations. The high PFAS levels found in dolphins inhabiting Charleston, South Carolina prompted investigation of these chemicals in this area. This study provides further evidence on the extent of contamination and potential sources of PFASs. In this study, concentrations of 11 PFASs measured in estuarine sediments collected in 2012 from the Charleston Harbor and the Ashley and Cooper Rivers (n=36) in South Carolina revealed higher levels than those reported in any other U.S. urban areas. Detectable levels were found in all sample locations with mean total PFAS concentrations of 3.79ngg(-1) (range 0.22 to 19.2ngg(-1) d.w.). Dominant compounds were perfluorooctane sulfonate (PFOS) (mean 1.52ngg(-1); range 0.09-7.37ngg(-1) d.w.), followed by perfluorodecanoate (PFDA) (mean 0.83ngg(-1); range 0.06-4.76ngg(-1) d.w.) and perfluorooctanoate (PFOA) (mean 0.42ngg(-1); range 0.02-2.52ngg(-1) d.w.). PFOS levels in sediments at 19 of 36 sites (representing 52% of the study area) exceeded the published global median PFOS sediment concentration of 0.54ngg(-1).
authors.affiliation: National Oceanic and Atmospheric Administration/National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research, 219 Fort Johnson Road, Charleston, SC 29412, USA.
authors.forename: Natasha D
authors.initials: ND
authors.lastname: White
authors.affiliation: National Oceanic and Atmospheric Administration/National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research, 219 Fort Johnson Road, Charleston, SC 29412, USA.
authors.forename: Len
authors.initials: L
authors.lastname: Balthis
authors.affiliation: Wadsworth Center, New York State Department of Health, Empire State Plaza, PO Box 509, Albany, NY 12201-0509, USA.
authors.forename: Kurunthachalam
authors.initials: K
authors.lastname: Kannan
authors.affiliation: Environment Canada, Water Science Technology Directorate, 867 Lakeshore Rd, Burlington, ON L7S 1A1, Canada.
authors.forename: Amila O
authors.initials: AO
authors.lastname: De Silva
authors.affiliation: Wadsworth Center, New York State Department of Health, Empire State Plaza, PO Box 509, Albany, NY 12201-0509, USA.
authors.forename: Qian
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Environment Canada, Water Science Technology Directorate, 867 Lakeshore Rd, Burlington, ON L7S 1A1, Canada.
authors.forename: Katherine M
authors.initials: KM
authors.lastname: French
authors.affiliation: National Oceanic and Atmospheric Administration/National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research, 219 Fort Johnson Road, Charleston, SC 29412, USA.
authors.forename: James
authors.initials: J
authors.lastname: Daugomah
authors.affiliation: Environment Canada, Water Science Technology Directorate, 867 Lakeshore Rd, Burlington, ON L7S 1A1, Canada.
authors.forename: Christine
authors.initials: C
authors.lastname: Spencer
authors.affiliation: National Oceanic and Atmospheric Administration/National Ocean Service, Center for Coastal Environmental Health and Biomolecular Research, 219 Fort Johnson Road, Charleston, SC 29412, USA. Electronic address: pat.fair@noaa.gov.
authors.forename: Patricia A
authors.initials: PA
authors.lastname: Fair
mesh_terms: D004784:Environmental Monitoring; D005466:Fluorocarbons / Q000032:analysis*; D019015:Geologic Sediments / Q000737:chemistry*; D013022:South Carolina; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005466:Fluorocarbons; D014874:Water Pollutants, Chemical
keywords: Charleston Harbor; Perfluoroalkyl substances (PFASs); Sediments