蚌埠市水稻籽粒重金属污染及健康风险评价

Heavy metal pollution and health risk assessment of rice grain in Bengbu city

对蚌埠市水稻籽粒重金属质量比进行测试，并采用单因子污染指数法、内梅罗综合污染指数法以及健康风险指数法对其污染程度和健康风险性进行了评价。结果表明，蚌埠市水稻籽粒中重金属Ph、Cu、Zn、Cr、Cd、As和Hg质量比的平均值分别为0．2073、4．5061、22．7308、0．2104、0．3057、0．0802、0．0096mg·kg^-1。单因子污染指数法评价结果表明，蚌埠市水稻籽粒中重金属Cd、Ph为轻污染，其他5种元素均为清洁水平。综合污染指数范围为0．23-1．84，平均值为1．18，表明水稻籽粒中重金属污染总体情况为轻污染程度。健康风险指数评价结果表明，蚌埠市水稻籽粒中重金属的摄入对儿童造成的健康风险高于成人，Cd对成人和儿童健康风险都较高，As、Cu、Zn、Cr等对儿童健康风险较高。

The concentrations of heavy metals in rice grain collected from Bengbu were measured. The method of singte factor pollution index,comprehensive pollution index and health risk index were used to assess pollution levels and health risk of heavy metals in rice grain. The results showed that the average of Pb,Cu,Zn, Cr, Cd,As and Hg element＇s concentrations in rice grain were 0.2073,4.5061,22.7308,0.2104,0.3057,0.0802 and 0.0096mg ·kg^-1,respectively. The single factor pollution index assessment showed that Cd and Pb were above the national standards and could be categorized as light pollution. However,other elements could be regarded as clean levels. The omprehensive pollution index of heavy metals in rice grain ranged from 0.23 to 1.84,with the average of 1.18,which was considered to be in the level of light pollution. The health risk index of heavy metals in rice grain collected from Bengbu for children was higher than that for adults. Moreover,Cd had an especially high risk for children and adults,and As,Cu,Zn,Cr had an especially high risk for children.