期刊
ENVIRONMENTAL POLLUTION
卷 169, 期 -, 页码 20-26出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.05.003
关键词
Polychlorinated biphenyls; Sediment PCBs; E-waste; Estuary; Spatial pattern; PCB source
资金
- National Natural Science Foundation of China [20837002, 40973077]
- National Basic Research Program of China [2009CB421603]
- Open Foundation of Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration [LMEB200901]
- Basic Scientific Research Operation Foundation of the Second Institute of Oceanography [JG0721]
A large portion of polychlorinated biphenyls (PCBs) from e-waste released into the coastal areas may be the potential source of PCBs to the global oceans. The paper presents data of PCBs concentrations in fifty surface sediment samples and a dated sediment core in Yangtze River Delta (YRE) and adjacent East China Sea (ECS). The total PCBs levels varied from 5.08 to 19.64 ng/g dry weight, with the highest concentrations situate within the river-sea boundary zone which is so-called marginal filter. Concurrent with the operation of e-waste recycling over the last two decades, PCB fluxes started to rise again after 1980s and reached a maximum in this century. The full data set was used to estimate the burden of PCBs in YRE and adjacent ECS. A total sediment burdens were 192.8 tons, with the spatial density of 364 ng/cm(2) which accounts for 1.9% of all the PCBs in China. (c) 2012 Elsevier Ltd. All rights reserved.
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