title: Enrichment of hexabromocyclododecanes in coastal sediments near aquaculture areas and a wastewater treatment plant in a semi-enclosed bay in South Korea.
abstract: The contamination status and potential sources of hexabromocyclododecanes (HBCDs) in the coastal environment were investigated using sediment samples from a semi-enclosed bay in South Korea. HBCDs displayed a very different distribution profile compared to polybrominated diphenyl ethers (PBDEs) and nonylphenol, indicating different emission sources inside the bay. A strong enrichment of HBCDs was found near aquaculture areas that used expanded polystyrene (EPS) buoys, which were confirmed to be the main source of HBCDs following an analysis of buoys collected from a market and the coast. EPS buoys contained large amounts of HBCDs, with lower levels in the outside layer than inside, implying the leaching of HBCDs from the surface throughout their lifetime. This was reflected in the high levels of HBCDs measured in coastal sediments near aquaculture farms. A wastewater treatment plant was found to be an additional source of HBCDs. A dated core sample revealed an increase in HBCD concentrations over time. The isomeric profiles for most of the surface and core sediment samples were dominated by the γ-diastereoisomer.
authors.affiliation: Oil and POPs Research Group, Korea Institute of Ocean Science and Technology, Geoje-shi 656-834, Republic of Korea.
authors.forename: Najat Ahmed
authors.initials: NA
authors.lastname: Al-Odaini
authors.affiliation: Oil and POPs Research Group, Korea Institute of Ocean Science and Technology, Geoje-shi 656-834, Republic of Korea; University of Science and Technology, Daejeon 305-320, Republic of Korea.
authors.forename: Won Joon
authors.initials: WJ
authors.lastname: Shim
authors.affiliation: Oil and POPs Research Group, Korea Institute of Ocean Science and Technology, Geoje-shi 656-834, Republic of Korea.
authors.forename: Gi Myung
authors.initials: GM
authors.lastname: Han
authors.affiliation: Oil and POPs Research Group, Korea Institute of Ocean Science and Technology, Geoje-shi 656-834, Republic of Korea; University of Science and Technology, Daejeon 305-320, Republic of Korea.
authors.forename: Mi
authors.initials: M
authors.lastname: Jang
authors.affiliation: Oil and POPs Research Group, Korea Institute of Ocean Science and Technology, Geoje-shi 656-834, Republic of Korea; University of Science and Technology, Daejeon 305-320, Republic of Korea. Electronic address: shhong@kiost.ac.
authors.forename: Sang Hee
authors.initials: SH
authors.lastname: Hong
mesh_terms: D017756:Aquaculture; D061006:Bays / Q000737:chemistry*; D004784:Environmental Monitoring; D005411:Flame Retardants / Q000032:analysis; D019015:Geologic Sediments / Q000737:chemistry; D006842:Hydrocarbons, Brominated / Q000032:analysis*; D056910:Republic of Korea; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005411:Flame Retardants; D006842:Hydrocarbons, Brominated; D062065:Wastewater; D014874:Water Pollutants, Chemical; C089796:hexabromocyclododecane
keywords: Coastal environment; Hexabromocyclododecanes; Polybrominated diphenyl ethers; Sediment; Source; Temporal trend