Distributions of polychlorinated biphenyls in the Daliao River estuary of Liaodong Bay, Bohai Sea (China)

•PCBs were determined in Daliao River estuary, Bohai Sea.•PCBs concentrations were at moderate level comparing with other estuary area.•Sedimentary PCBs concentrations decreased offshore.•The samples showed a marked predominance of the high chlorinated congeners. The distributions of 41 polychlorina...

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Veröffentlicht in:Marine pollution bulletin 2014-01, Vol.78 (1-2), p.77-84
Hauptverfasser: Men, Bin, He, Mengchang, Tan, Li, Lin, Chunye
Format: Artikel
Sprache:eng
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Zusammenfassung:•PCBs were determined in Daliao River estuary, Bohai Sea.•PCBs concentrations were at moderate level comparing with other estuary area.•Sedimentary PCBs concentrations decreased offshore.•The samples showed a marked predominance of the high chlorinated congeners. The distributions of 41 polychlorinated biphenyls (PCBs) were determined in the aqueous phase, suspended particulate matter (SPM), and sediment of the Daliao River estuary in Liaodong Bay, Bohai Sea (China). The total PCB concentrations ranged from 5.51 to 40.28ngL−1 in the surface water, from 6.78 to 66.55ngL−1 dry weight in the SPM, and from 0.83 to 7.29ngg−1 dry weight in the sediment. The PCB concentrations in water, SPM, and sediment were moderate relative to those reported for other estuary and marine systems around the world. Sedimentary PCB concentrations decreased offshore due to the active deposition of laterally transported river-borne particles. The predominance of the highly chlorinated congeners for the water, SPM, and sediment samples are an indication of either a lack of degradation or the presence of nearby or recent releases into the environment.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2013.11.005