摘要
本文在对焦作市采暖期大气降尘样品中重金属含量进行测定的基础上,研究其分布特征并评估其导致的健康风险。结果表明,焦作市采暖期大气降尘重金属Cr、Co、Ni、Cu、As、Cd、Pb、Zn的含量范围为14.18-136.97、3.40-13.98、15.57-63.28、15.05-150.00、19.86-71.49、1.23-22.36、105.52-213.18、487.00-2180.00 mg/kg,重金属元素含量均服从对数正态分布。各重金属非致癌风险暴露剂量的排序为Zn〉Pb〉Cr〉Cu〉Ni〉As〉Co〉Cd。3种途径的暴露剂量均为儿童大于成人,且儿童的非致癌危害商大于成年人;儿童和成人的致癌风险Risk排序均为Cr〉As〉Co〉Cd〉Ni,致癌风险均低于10^-6-10^-4,暂无致癌风险。
Heavy metal concentrations in the dust fall of Jiaozuo City,China,were determined for distribution characteristics and health risk assessment. Results show that the content ranges of heavy metals Cr,Co,Ni,Cu,As,Cd,Pb and Zn are 14. 18 - 136. 97,3. 40 - 13. 98,15. 57 - 63. 28,15. 05 - 150. 00,19. 86 - 71. 49,1. 23 - 22. 36,105. 52 - 213. 18 and 487. 00 - 2180. 00 mg/kg,respectively. Heavy metal pollution levels of dust are relatively high,and higher than those in soil to varying degrees. Besides,the noncarcinogenic risks of metals are in the order as Zn〉Pb〉Cr〉Cu〉Ni〉As〉Co〉Cd. In Particular,the non-carcinogenic risks of Zn and Pb for children are high,which requiring more attention. Non carcinogenic risk of children is higher than adult. Carcinogenic risks for children and adults are in the order of Cr〉As〉Co〉Cd〉Ni,with the carcinogenic risk lower than 10^-6- 10^-4,so there is no risk of cancer by heavy metals in the study dust fall.
出处
《地球与环境》
CAS
CSCD
北大核心
2018年第1期59-65,共7页
Earth and Environment
基金
国家自然科学基金项目(41272173)
河南省高等学校重点科研项目(16A170001)
河南省高校基本科研业务费专项资助(NSFRF1631)
关键词
降尘
重金属
分布特征
健康风险
dust fall
heavymetal
distribution characteristics
health risk assessment
