Abstract：In each March during 2006~2012, oyster samples (Crassostrea rivularis Gould ) were collected from 23sampling 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 8.11to 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+113were 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.
王清云, 甘居利, 陈海刚, 马胜伟, 张喆, 蔡文贵, 贾晓平. 南海北部沿岸牡蛎体内PCBs的时空分布特征及评价[J]. 中国环境科学, 2013, 33(10): 1791-1798.
WANG Qing-Yun, GAN Ju-Li, CHEN Hai-Gang, MA Sheng-Wei, ZHANG Zhe, CAI Wen-Gui, JIA Xiao-Ping. Spatial-temporal characters analysis and risk assessment of PCBs in oysters along the Northern Coast of the South China Sea. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(10): 1791-1798.
