莱州常见海洋贝类中重金属污染情况调查评估

Investigation and Assessment of Heavy Metal Contamination in Marine Shellfishes from Laizhou

分析产于莱州附近海域中的6种常见贝类中铜、铅、锌、镉、铬、无机砷、汞等重金属的残留水平,并利用目标危险系数(THQs)对莱州市成人及儿童两大人群食用风险进行了评估。结果显示,不同贝类产品中重金属含量差异很大,6种贝类产品中的铅和镉超标率较高,以海螺和毛蚶最严重。健康风险评价计算结果显示,成人和青年通过食用毛蚶和海螺会存在较高的镉暴露健康风险,菲律宾蛤仔中对成人组存在食用无机砷的暴露健康风险。此外,所有贝类中的无机砷THQ值相对高于其他金属,对人体通过食用蓄积造成危害的风险值高于其他金属。

The contents of copper,lead,zinc,cadmium,chromium,inorganic arsenic and mercury in six popular species of marine shellfish from Laizhou coastal waters were determined. Health risks of heavy metals for Laizhou consumers included adults and children from the consumption of shellfish were assessed by the Target Hazard Quotients（THQs）. Results showed that the heavy metal contents varied in different species of shellfish,The over standard rates of lead and cadmium in all kinds of shellfish were very high,especially Busycon canaliculatu and Scapharca subcrenata. The calculation results of the target hazard quotient（THQ） indicate that there was high cadmium health risk for both children and adults through the consumption of Busycon canaliculatu and Scapharca subcrenata,there was high inorganic arsenic health risk for adults from consuming Ruditapes philippinarum too. In addition,the THQ results of inorganic arsenic from the consumption of all kinds of shellfish were higher than the other heavy metals,which will lead to a higher health risk for the consumers.