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《China Environmental Science》 2013-10
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Spatial-temporal characters analysis and risk assessment of PCBs in oysters along the Northern Coast of the South China Sea

WANG Qing-yun;GAN Ju-li;CHEN Hai-gang;MA Sheng-wei;ZHANG Zhe;CAI Wen-gui;JIA Xiao-ping;Key Laboratory of Fishery Ecology and Environment, Guangdong Province, Key Laboratory of South China Sea Fishery Resources Exploitation Utilization, Ministry of Agriculture, Scientific Observing and Experimental Station of South ChinaSea Fishery Resources Environments, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;  
In each March during 2006~2012, oyster samples(Crassostrea rivularis Gould) were collected from 23 sampling sites along the northern coast of the South China Sea. Gas chromatography with electron capture detector was used to determine the contents, the residues levels, spatial and temporal trends, compositions of PCBs, as well as the risk to human health were analyzed and assessed. The results showed that PCBs contents ranged from 8.11 to 29.10ng/g with an average of 16.57ng/g on wet weight basis. PCBs contents in oysters along the northern coast of the South China Sea presented a general trend of descending. PCBs contents in Pearl River Estuary were significantly higher than East Guangdong coast, West Guangdong coast, Guangxi coast and Hainan coast. The contents of pentachlorobiphenyls were the highest in all of the PCBs homologs groups, occupying 47.9%, followed by trichlorodiphenyls and tetrachlorobiphenyls, occupying 30.6% in total. The contents of PCBl05、PCB118 和 PCBl01+113 were dominated in all of the congeners, three of them occupied 24.0%. The PCBs residues levels of all oyster samples were far below the limits of food security standards published at home and abroad, and the estimated uptake amount of PCBs is only 27.6% of TDI regulated by WHO, indicating that the health risk arising from the exposure to PCBs is small. The average TEQ of PCBs in tissues of oysters is 39.4pg/g.
【Fund】: 科技部科研院所社会公益研究专项(2005DIB3J021);; 广东省科技计划项目(2009B030600001 2011A050902006);; 中央级公益性科研院所基本科研业务费专项资金项目(2009YD01 2010YD04 2010TS12);; 广东省渔业生态环境重点实验室重点开放课题(GDKL2010—001)
【CateGory Index】: X826
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