马丽莎, 谢文平, 田斐, 尹怡, 单奇, 郑光明, 李恒翔. 广东沿海养殖牡蛎中多氯联苯残留水平及人体饮食暴露风险评估[J]. 南方水产科学, 2021, 17(2): 11-19. DOI: 10.12131/20200209
引用本文: 马丽莎, 谢文平, 田斐, 尹怡, 单奇, 郑光明, 李恒翔. 广东沿海养殖牡蛎中多氯联苯残留水平及人体饮食暴露风险评估[J]. 南方水产科学, 2021, 17(2): 11-19. DOI: 10.12131/20200209
MA Lisha, XIE Wenping, TIAN Fei, YIN Yi, SHAN Qi, ZHENG Guangming, LI Hengxiang. Bioaccumulation and human health risk assessment of polychlorinated biphenyls (PCBs) in farmed oysters along Guangdong coast[J]. South China Fisheries Science, 2021, 17(2): 11-19. DOI: 10.12131/20200209
Citation: MA Lisha, XIE Wenping, TIAN Fei, YIN Yi, SHAN Qi, ZHENG Guangming, LI Hengxiang. Bioaccumulation and human health risk assessment of polychlorinated biphenyls (PCBs) in farmed oysters along Guangdong coast[J]. South China Fisheries Science, 2021, 17(2): 11-19. DOI: 10.12131/20200209

广东沿海养殖牡蛎中多氯联苯残留水平及人体饮食暴露风险评估

Bioaccumulation and human health risk assessment of polychlorinated biphenyls (PCBs) in farmed oysters along Guangdong coast

  • 摘要: 文章利用气相色谱质谱法测定了广东沿海主要养殖区 (汕头、汕尾、深圳、珠海、江门、阳江、湛江) 养殖牡蛎体内30种多氯联苯 (Polychlorinated biphenys, PCBs) 的含量,评价了其污染水平和致癌风险。结果表明,广东养殖牡蛎中普遍检出PCBs,检出率为97.6%,其质量分数为nd~8.62 ng·g−1 (湿质量,下同),平均值为 (0.57±1.23) ng·g−1,其中以深圳水域养殖牡蛎体内的PCBs含量最高,珠海次之,汕头、阳江、江门、湛江及汕尾较低。不同地区养殖牡蛎中PCBs的组成模式类似,均以五氯代和六氯代PCBs为主。与国内外部分沿海海域贝类相比,广东省养殖牡蛎中PCBs含量处于较低水平。广东省养殖牡蛎中PCBs残留量低于中国《食品安全国家标准 食品中污染物限量》及欧盟国家的贝类卫生标准,食用牡蛎的致癌风险及危害商数均小于美国环保局 (EPA) 推荐的可接受风险水平,致癌风险处于可接受风险水平。

     

    Abstract: We analyzed 30 congeners of polychlorinated biphenyls (PCBs) in the farmed oysters (Crassostrea rivularis, C. hongkongensis, C. gigas) from the main aquaculture areas along Guangdong coast (Shantou, Shanwei, Shenzhen, Zhuhai, Jiangmen, Yangjiang and Zhanjiang) by using gas chromatography mass spectrometry (GC/MS). The detection rates of PCBs in oysters and their potential risks to human health were also evaluated. Results show that PCBs had a detection rate of 97.6% in the farmed oysters along Guangdong coast. Concentration of PCBs in oysters ranged from nd to 8.62 ng·g−1 (wet mass), with an average value of (0.57±1.23) ng·g−1. The highest PCBs concentration was found in Shenzhen, followed by Zhuhai, Shantou, Yangjiang, Jiangmen, Zhanjiang and Shanwei. The congeners of PCBs and their compositions were similar in different locations, showing that Hexa-PCBs and Penta-PCBs are the most abundant components in oysters. Compared with the shellfish in other coastal waters at home and abroad, the concentration of PCBs in this study is at a lower level. Bioaccumulation of PCBs in farmed oysters is lower than the limited residue levels of PCBs in National Food Safety Standard Limits of Pollutants in food in China and the hygienic standard for shellfish in European Union. The carcinogenic risk and hazard quotient of PCBs in oysters are less than the threshold value of the US Environmental Protection Agency, indicating that the carcinogenic risk of indicator PCBs in Guangdong oysters is at an acceptable level for consumers.

     

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