Distribution, sources and ecological risks of organochlorine compounds (DDTs, HCHs and PCBs) in surface sediments from the Pearl River Estuary, China

被引：53
作者：
Tang, Dehao [1 ,2 ]
Liu, Xingjian [2 ,3 ,4 ]
He, Haijun [1 ,2 ]
Cui, Zhenang [1 ,2 ]
Gan, Huayang [1 ,2 ]
Xia, Zhen [1 ,2 ]
机构：
[1] Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China
[2] Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China
[3] South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China
[4] Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, CAS, ISEE, Guangzhou 510301, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2020年 / 152卷
关键词：
Organochlorine compounds (DDTs; HCHs and PCBs); Distribution; Potential source apportionment; Ecological risk assessment; Surface sediments; Pearl River Estuary; POLYCHLORINATED-BIPHENYLS PCBS; PERSISTENT ORGANIC POLLUTANTS; GLOBAL DISTRIBUTION; PESTICIDES OCPS; YANGTZE ESTUARY; BAY; POLLUTION; SEA; DELTA; CONTAMINANTS;
D O I：
10.1016/j.marpolbul.2020.110942
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The Pearl River Estuary is an important sink of organochlorine compounds (OCs), and OC pollution levels in surface sediments remain largely unknown at present. We collected and analysed residual DDTs, HCHs and PCBs of 45 surface sediments from the Pearl River Estuary in 2017. The values of DDTs (1.83 to 6.98 ng.g(-1)) and HCHs (0.43 to 2.14 ng.g(-1)) were higher in the Humen outlet, and the values of PCBs (4.6 to 187.4 ng.g(-1)) were higher in the coastal areas of Shenzhen. The DDTs and HCHs have generally decreased while the PCBs have been rapidly increasing in recent decades. The DDTs might originate from technical DDT and dicofol. The major source of HCHs was lindane. The main potential sources of PCBs were increased industrial products, ship painting, E-waste disassembly, maricultural and agricultural pollution. The total PCBs and DDTs had medium ecological risks according to the sediment quality guidelines.
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页数：9
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