title: Bioaccumulation and trophic transfer of short chain chlorinated paraffins in a marine food web from Liaodong Bay, North China.
abstract: Short chain chlorinated paraffins (SCCPs) are under the evaluation for inclusion into the Stockholm Convention on persistent organic pollutants. However, information on their bioconcentration and biomagnification in marine ecosystems is unavailable, limiting the evaluation of their ecological risks. In this study, seawater, sediment, zooplankton, invertebrates, and fishes collected from Liaodong Bay, Bohai Sea, North China were analyzed to investigate the residual level, congener group profile, bioaccumulation, and trophic transfer of SCCPs in a marine food web. The total concentrations of SCCPs ranged from 4.1 to 13.1 ng L(-1) in seawater, 65 to 541 ng g(-1) (dw) in sediment, and 86 to 4400 ng g(-1) (ww) in organisms. Correspondence analysis indicated the relative enrichment of C10Cl5 and C11Cl5 formula groups in most aquatic organisms. Both the logarithm bioaccumulation factors (log BAFs: 4.1-6.7) and biota-sediment accumulation factors (BSAFs: 0.1-7.3) of individual congeners implied the bioaccumulation of SCCPs. The trophic magnification factor (TMF) of ∑SCCPs was determined to be 2.38 in the zooplankton-shrimp-fish food web, indicating biomagnification potential of SCCPs in the marine ecosystem. The TMF values of individual congener groups significantly correlated with their log KOW values.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, Liaoning, China.
authors.forename: Xindong
authors.initials: X
authors.lastname: Ma
authors.forename: Haijun
authors.initials: H
authors.lastname: Zhang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Yao
authors.forename: Jingwen
authors.initials: J
authors.lastname: Chen
authors.forename: Jiping
authors.initials: J
authors.lastname: Chen
mesh_terms: D000818:Animals; D059001:Aquatic Organisms / Q000378:metabolism*; D061006:Bays / Q000737:chemistry*; D058448:Biota; D002681:China; D004784:Environmental Monitoring; D005399:Fishes / Q000378:metabolism; D020387:Food Chain; D019015:Geologic Sediments / Q000737:chemistry; D006843:Hydrocarbons, Chlorinated / Q000378:metabolism*; D007448:Invertebrates / Q000378:metabolism; D010232:Paraffin / Q000378:metabolism*; D012623:Seawater / Q000737:chemistry; D015048:Zooplankton / Q000378:metabolism
chemical_list: D006843:Hydrocarbons, Chlorinated; D010232:Paraffin