辽宁省淡水鱼类体内多溴联苯醚和六溴环十二烷的富集特征及健康风险评估

Bioacumulation Characteristics and Health Risks Assessment of Polybrominated Diphenyl Ethers and Hexabromocyclododecane in Freshwater Fish Tissues from Liaoning Province

分析了辽宁省4个典型城市淡水鱼类中多溴联苯醚(PBDEs)和六溴环十二烷(HBCDs)的富集特征,并进行了健康风险评估。结果表明:淡水鱼类体内PBDEs和HBCDs检出率均为100%,PBDEs和HBCDs的平均质量分数分别为9.73和21.81 ng/g(脂重)。PBDEs中的单体BDE-183、BDE-209和BDE-153在辽河流域不同鱼类的同源种中占优势,分别占PBDEs的26.8%~40%,17%~44%和14%~22%。在HBCDs的3种同系物中,α-HBCD是主要的单体,其相对贡献率为45.15%~84.71%。辽河流域的工厂企业生产活动对淡水鱼类产生了影响,居民通过消费水产品摄入PBDEs和HBCDs。健康风险评估结果显示:PBDEs和HBCDs的健康风险指数均<1,说明当地水产品中PBDEs和HBCDs的非致癌风险处于可接受水平。

The study analyzed the bioaccumulation characteristics and health risks of polybrominated diphenyl ethers(PBDEs)and hexabromocyclododecanes(HBCDs)in freshwater fish from 4 typical cities in Liaoning province.The results showed that the detection rate of PBDEs and HBCDs in freshwater fish was 100%.The average concentrations ofΣPBDEs andΣHBCDs in tissues of freshwater fish were 9.73 ng/g lipid weight and 21.81 ng/g lipid weight,respectively.BDE 183,BDE 209 and BDE 153 were predominant among the PBDEs congeners in different fish species from Liaohe River Basin,accounting for 26.8%~40%,17%~44%and 14%~22%ofΣPBDEs,respectively.αHBCD was the main component of HBCDs,accounting for 45.15%~84.71%ofΣHBCDs for the different fish species from Liaohe River Basin.The findings showed that modern factories near the Liaohe River Basin have caused pollution to local freshwater fish species.The results of health risk assessment showed that hazard index exposure to PBDEs and HBCDs were less than 1,indicating that the non-carcinogenic risks of PBDEs and HBCDs in aquatic products consumed by residents in the local area were low or negligible.