宝鸡长青镇工业园区周围灰尘重金属污染特征及健康风险

利用X-Ray荧光光谱仪对宝鸡市长青镇工业园区周围灰尘中重金属含量进行测试,并采用健康风险评价方法对灰尘中重金属的污染状况进行了分析。测试结果显示,长青镇工业园区周围灰尘中重金属Cu、Pb、Zn、Cr、Ni和V的平均含量分别为178.2、1586.2、1918.8、1591.8、40.2和81.9mg/kg,均高于陕西省土壤环境背景值。健康风险评价结果显示,手-口摄入行为是人体摄入灰尘中重金属的主要途径,儿童经手口摄入Pb和Cr的暴露风险商及总危害指数均大于1,说明灰尘Pb和Cr对儿童具有重要的健康危害。

Pollution Level and Health Risk of Heavy Metals in Dust from the Surrounding Environment of the Industrial Park in Changqing Town of Baoji

The concentrations of heavy metals in dust samples from the surrounding environment of the industrial park in Changqing Town of Baoji City were measured by X-ray fluorescence spectrometry,while the method of health risk assessment was used to assess the health risk of heavy metals in dust.The results showed that the average concentrations of Cu,Pb,Zn,Cr,Ni and V in dust are 178.2,1586.2,1918.8,1891.8,40.2 and 81.8 mg/kg,respectively,which are all higher than the corresponding background values of Shaanxi topsoil.The health risk assessment showed that ingestion contact behavior is the main pathway for human intake of heavy metals in dust.For children,the exposure risk of Pb and Cr through the route of ingestion and the total hazard index are higher than unity,which shows that Pb and Cr in dust are very harmful to children’s health.