Heavy metal levels in seafood from Honghai Bay and its human dietary exposure assessment

分析了广东红海湾13种海产品肌肉组织中8种重金属铬(Cr)、钴(CO)、镍(nI)、铜(Cu)、锌(zn)、砷(AS)、镉(Cd)和铅(Pb)的浓度水平,并利用单因子污染指数法(Pn)评价其污染状况。利用美国环保署提出的人体健康风险评价模式进行人体重金属暴露风险评估,同时利用金属污染指数(XMPI)研究生物体的重金属富集效应。结果显示:红海湾生物总体污染水平较低,Cr在软体类生物中属于轻度污染;nI在甲壳类生物中属于轻度污染;Cu和zn在鱼类中属于轻度污染;Cr在鱼类和甲壳类中都属于中度污染。口虾蛄OrATOSQuIllA OrATOrIA对Cd、Cu、zn存在潜在的严重积累作用,且AS含量超过了食用的参考剂量,需引起重视。人体暴露风险评估表明,食用红海湾海产品(口虾蛄除外)对人体潜在的健康风险相对较低,建议食用海产品量控制在25 g·d？1以内。Concentrations of 8 kinds of heavy metals including Cr, Co, Ni, Cu, As, Zn, Cd and Pb in the muscles of thirteen seafood from Honghai Bay were determined.Single factor pollution index(Pn) was applied to evaluate the contamination status of these organisms.Human health risk assessment model by US EPA was employed to evaluate the human dietary exposure.Metal pollution index(XMPI) was used for the enrichment effect of heavy metals on seafood.The results showed that the level of heavy metal in the marine organisms from Honghai Bay was low.Ni in crustacean and Cu, Zn in fish and Cr in mollusk were slightly polluted while Cr in fish and crustacean was moderately polluted.It should be highlighted that Oratosquilla oratoria showed a strong accumulative capacity for Cu, Zn and Cd.The level of As was beyond the reference dose.The results of human exposure risk assessment indicated that consumption of seafood(except Oratosquilla oratoria) would not pose a risk to humans.Suggested daily amount of seafood consumption should be limited to be less than 25 g·d?1.中国博士后科学基金(2012M510201); 中国科学院百人计划资助项

Research and Development of Carbon Based Additives for Advanced Lead Carbon Batteries

Research and Development of Carbon Based Additives for Advanced Lead Carbon Batterie