浙南沿海养殖贝类重金属Cu、Cd、As、Pb含量研究

Study on the Heavy Metals Cu, Pb, Cd, As in Shellfish from South Zhejiang

于2014年6、8、10和12月采集温州沿海贝类养殖区具有代表性的产品青蛤、缢蛏、泥蚶和牡蛎共4种128份,对金属含量进行污染评价,运用危害商数(THQs)评价食用海产品对人体健康的潜在风险。结果表明,样品中铜、铅、镉、砷的含量范围分别为0.355~2.155、0.028~1.231、0.138~1.282、0.126~1.275mg/kg。金属污染指数评价结果表明,青蛤重金属污染程度最高,污染程度为青蛤>缢蛏>泥蚶>牡蛎。铅、镉、砷的危害商数小于1,说明养殖贝类中这几种重金属对人体健康不具有潜在风险。

128 typical samples of 4 species, including Cyclina sinensis,Sinonovacula constricta,Tegillarca granosa,Saccostrea cucullata,were collected from the main shellfish culture area of Wenzhou in June,August,October and December,2014. The heavy metal contamination estimation in shellfish was conducted,and the potential risks of eating seafood to human health were evaluated on the basis of target hazard quotients （THQs）. The results showed the contents of Cu,Pb,Cd,As in samples were in the range of 0.355~2.155 mg/kg, 0.028~1.231 mg/kg,0.138~1.282 mg/kg,0.126~1.275 mg/kg respectively. The metal pollution index indicated C. sinensis was in high pollution level, and the pollution level sequence was C. sinensis〉S. constricta〉T. granosa〉S. cucullata. The THQ values of Pb,Cd,As were all less than 1,which meant there was no potential risk of these heavy metals for human health.