海口市售6种海洋贝类中多氯联苯(PCBs)含量及其潜在致癌风险评价

doi:10.11934/j.issn.1673-4831.2018.12.005

Abstract

Abstract:

Polychlorinated biphenyls (PCBs) in molluscs may pose a potential threat to consumer health, but research is currently limited. In order to explore the threat of PCBs to consumer health in marine molluscs, GC-MS was used to determine the content of 7 kinds of indicator PCBs in 6 kinds of molluscs sold in Haikou, the pollution level was evaluated and the carcinogenic risk to consumers was assessed. The results showed that the content of seven indicator PCBs in marine molluscs sold in Haikou was 17.51-47.43 ng·g^-1 (dry weight), and the average content was 32.78 ng·g^-1. The composition of indicator PCBs in molluscs was dominated by medium and low chlorinated PCBs (trichloro, tetrachloro and pentachloro-PCBs), of which tetrachloro-PCBs are the most important component of indicator PCBs in marine molluscs in Haikou. They accounts for 38.49% of the total PCBs. The total content of PCBs in marine molluscs sold in Haikou was much lower than the USA and China's limits, indicating that the pollution of PCBs in molluscs was at an acceptable level. Compared with other studies in China, the total content of PCBs in marine molluscs sold in Haikou was at a medium level. The 5%, 50%, and 95% carcinogenic risk of indicator PCBs in molluscs sold in Haikou through the molluscs intake for adult consumers were less than the threshold value of the US Environmental Protection Agency, indicating that the carcinogenic risk of indicator PCBs in marine molluscs sold in Haikou was at an acceptable level for adult consumers.

Key words: marine molluscs, polychlorinated biphenyls (PCBs), pollution levels, cancer risks

CLC Number:

XIAO Chun-lin, YAN Feng. Concentrations and Potential Cancer Risks of Indicator Polychlorinated Biphenyls (PCBs) in Molluscs From Market of Haikou City[J]. Journal of Ecology and Rural Environment, 2018, 34(12): 1091-1095.

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Concentrations and Potential Cancer Risks of Indicator Polychlorinated Biphenyls (PCBs) in Molluscs From Market of Haikou City

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