Content Characteristics of Heavy Metal and Health Risk Assessment of Road Dust in Suzhou City

摘要

In this paper, Suzhou city was taken as an example to explore the level and distribution of heavy metal content in roadrndust through field sampling and laboratory analysis of distribution. On this basis, the health risk assessment mode was used tornassess the health risks of heavy metals in road dust in Suzhou City. The results showed that the heavy metals of road dust V, Cr,rnMn, Cu, Zn, Pb, Hg, and Ni were 100.60, 142.60, 491.32, 37.12, 267.80, 63.08, 0.101304, respectively, and the average ofrn20.33452 mg • kg-1 in Suzhou. In addition to Mn and Ni, the other elements were higher than the national (CG) and Anhui (CS)rnbackground values of heavy metals in soil. V, Mn, Zn, Cu, Pb average content of the highest value in the business district, Hg,rnCr highest value appeared in the industrial zone. Eight heavy metals in children and adults in the non-carcinogenic risk index isrnless than 1 in road dust of Suzhou City. The value of non-cancer risk of Cr is maximal and Hg is minimal. Cr and Ni ofrncarcinogenic heavy metals were lower than 10~(-6) carcinogenic risk indexes, it does not pose a carcinogenic hazard to humans.