宝鸡市街道灰尘重金属污染的健康风险评价

对宝鸡市工业区、交通区和商业区等不同功能区所采集的街尘样品应用美国EPA人体暴露风险评价方法对灰尘重金属进行健康风险评价.结果表明,As、Hg、Pb、Cu、Zn、Cr、Co、Ni、Mn、V这10种重金属平均含量均高于陕西土壤背景值,其中Hg、Pb平均含量分别为陕西土壤背景值的37倍和20倍.健康风险评价表明,灰尘中10...

Health Risk Assessment of Heavy Metals in Street Dust in Baoji City

Health risk assessment of heavy metals in street dust collected from industrial areas, heavy-traffic and lowtraffic density areas, commercial areas and residential districts of Baoji City was carried out by using US EPA Health Risk Assessment Model. The results showed that the mean concentrations of As, Hg, Pb, Cu, Zn, Cr, Co, Ni, Mn and V were all higher than Shaanxi soil background values. Among the analyzed heavy metals, the mean concentrations of Hg and Pb were 37 and 20 times higher than the background values, respectively. The health risk assessment results showed that the non-cancer hazard of 10 heavy metals to children was higher than to adults. However, the risk of exposure for children and adults was the same, that was, ingestion 〉 dermal touch 〉 inhalation. The four carcinogenic metals Cr,Ni,As and Co had not formed carcinogenic risk, but their latent hazardous should be attended.