title: Residues and sources recognition of polychlorinated biphenyls in surface sediments of Jiaojiang Estuary, East China Sea.
abstract: Twenty-three surface sediment samples were collected from Jiaojiang Estuary, East China Sea in order to assess the distribution, possible sources, and potential risk of polychlorinated biphenyls (PCBs) in the environment. Total concentrations of PCBs ranged from 4.93 to 108.79 ng g(-1) dry weight for all sampling stations, with a substantial higher concentration in the inner part of the estuary than the outer part of the estuary. PCB patterns in sediments from sites 1-8 were extremely dominated by tetra-PCBs, which probably due to the discharge of local industrial plants but not the expected input from the nearby e-waste recycling areas. Principal component analysis revealed that the sources of PCBs for sites 9-23 were associated with Aroclor 1248 or Aroclor 1221. However, physical migration and bio-degradation may also play a role on PCB distribution. Hazard assessment of PCBs indicated possible toxic potential, particularly in areas close to point sources.
authors.affiliation: International Joint Research Center for Persistent Toxic Substances (IJR-PTS), College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, China.
authors.forename: Shan-shan
authors.initials: SS
authors.lastname: Zhou
authors.forename: Lin-ya
authors.initials: LY
authors.lastname: Shao
authors.forename: Hua-yun
authors.initials: HY
authors.lastname: Yang
authors.forename: Chong
authors.initials: C
authors.lastname: Wang
authors.forename: Wei-ping
authors.initials: WP
authors.lastname: Liu
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry*; D009792:Oceans and Seas; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls