吉林省玉米子粒中重金属污染风险评估

通过单因子污染指数法、内梅罗指数法和目标危害指数法对吉林省玉米子粒中重金属Cr、As、Cd、Hg、Pb进行风险评估。研究表明，吉林省玉米子粒中5种重金属含量均未超出限量值，1.57%样品中Cr处于警戒线水平，0.39%样品中Hg处于警戒线水平。吉林省玉米子粒中5种重金属的内梅罗指数均小于1，处于安全水平；目标危害指数均小于1，说明暴露人群不存在重金属Cr、As、Cd、Hg、Pb健康风险。5种重金属的暴露人群潜在健康风险高低顺序为Cr>As>Hg>Pb>Cd，其中Cr、As健康风险明显高于Cd、Hg、Pb。不同地区暴露人群潜在健康风险高低顺序为四平市>白城市>吉林市>松原市>通化市>长春市>延边州>白山市>辽源市>梅河口市。

Risk Assessment of Heavy Metals Pollution in Maize in Jilin Province

Risk assessment of heavy metals Cr, As, Cd, Hg and Pb in maize in Jilin Province was conducted using the single factor pollution index method, Nemerow index method and target hazard index method. The content of five heavy metals in maize in Jilin Province did not exceed the limit value. In separately 1.57% and 0.39% samples, Cr and Hg was at the level of warning line. The Nemerow index of five heavy metals in maize in Jilin Province was less than 1, which was at a safe level. The target hazard index was less than 1, indicating that there was no health risk of heavy metals Cr, As, Cd, Hg and Pb in the exposed population. The potential health risk of the exposed population was in the order of Cr>As>Hg>Pb>Cd, and the health risks of Cr and As were significantly higher than those of Cd, Hg and Pb. The order of potential health risk in different regions was Siping City>Baicheng City>Jilin City> Songyuan City>Tonghua City>Changchun City>Yanbian Prefecture>Baishan City>Liaoyuan City>Meihekou City.