芜湖市区土壤和地表灰尘中As含量分布及健康风险评价  

CONCENTRATIONS AND HEALTH RISK ASSESSMENT OF ARSENIC IN SOIL AND ROAD DUST IN WUHU URBAN

作　　者：方凤满[1] 谢宏芳[1] 王海东[1] 蒋炳言[1] 

机构地区：[1]安徽师范大学国土资源与旅游学院,芜湖241003

出　　处：《环境化学》2010年第5期880-883,共4页Environmental Chemistry

基　　金：国家自然科学基金项目(40901258);安徽自然灾害过程与防控研究省级实验室项目;安徽高校省级自然科学研究重点项目(KJ2009A137)资助

摘　　要：分析了芜湖市区57个土壤和地表灰尘中As含量及其健康风险评价.结果表明,芜湖市区土壤和灰尘中As的含量范围分别为2.25—31.86mg.kg-1和3.53—40.97 mg.kg-1,平均为14.09 mg.kg-1和13.16mg.kg-1,是土壤背景值的1.33倍和1.24倍,不存在明显污染.高新技术开发区土壤和灰尘中As的含量明显高于经济技术开发区和中心城区,说明砷的农业来源明显.土壤和灰尘中As的含量与土灰的理化性质相关性不显著.健康风险评价表明,土壤与灰尘中As的非致癌风险<1,对人体基本不会造成危害;As的3种不同途径致癌与非致癌风险中,经手-口摄入途径的风险最大,其次为皮肤接触,呼吸吸入最小,但均在癌症风险阈值范围10-6—10-4内,不会对人体健康造成致癌危害.Fifty-seven soil and street dust samples were collected in high-tech development zone,center city,economic and technological development zone in Wuhu urban.As concentrations and health risk assessment were carried out by using USEPA health risk assessment model.Results showed that： As concentrations in soil and street dust were ranged 2.25—31.86 mg·kg^-1 and 3.53—40.97 mg·kg^-1,with the average of 14.09 mg·kg^-1 and 13.16 mg·kg^-1,which had non-obvious pollution.As concentrations in soil and street dust of high-tech development zone was obvious higher than those of economic and technological development zone and center city.Correlation of As concentrations in soil and dust with physical and chemical properties is not significant.Human exposure health risk assessment showed that As non-cancerous risk in soil and street dust were lower than 1,which had no significant risk.Hand-mouth intake way was the main way of children′s As exposure to soil and surface dust,skin absorption way was the second way and through air inhalation way was the smallest.Cancer risk of As were lower than their threshold values which indicated a lower risk of cancer and could not cause health hazards.

关 键 词：土壤和灰尘 As含量 健康风险评价 

分 类 号：X53[环境科学与工程—环境工程] X820.4