汇水区地表灰尘重金属健康风险评估——以济南市东泺河汇水区为例

Health Risk Assessment of Heavy Metals in Surface Dust in Catchment Areas——A Study on Jinan Dongluo River Catchment Area

选取济南市东泺河城市汇水区为研究对象,分采暖季和非采暖季,采集30个点位的地表灰尘,测定了Cd,Cr,Cu,Pb,Zn,Hg,As等7种重金属质量分数,评估了其健康风险水平.结果表明:儿童和成人两季致癌健康风险均小于最大可接受风险值.成人两季非致癌风险均可忽略.儿童非致癌风险在非采暖季存在,采暖季可忽略.非致癌风险贡献前三位的重金属为:Cr>Pb>Cu,这3种重金属占到总非致癌风险的95%左右.Cr致癌风险占总致癌风险的99.5%以上.风险较高的区域均集中在研究区的西北方向.重金属污染来源主要为交通源和小型建材企业.

Catchment area of the Dongluo River in Jinan was selected as the research object,and 30 samples were selected to analyze the contents of seven heavy metals(Cd,Cr,Cu,Pb,Zn,Hg,and As)in two seasons.The health risk level of surface dust in the region was assessed.The results show that the risk of cancer in children and adults was less than the maximum acceptable risk.The non carcinogenic risk of adults can be ignored in two seasons.Children's non carcinogenic risk exists in non heating season,which can be ignored in heating season.The top three non-carcinogenic risk contributions are Cr>Pb>Cu,and the non-carcinogenic risk of three heavy metals accounts for about 95%of the total non-carcinogenic risk.The carcinogenic risk of Cr is more than 99.5%of the total carcinogenic risk.High risk areas are concentrated in the northwest of the study area.Heavy metal pollution sources may be traffic sources and small-scale building materials enterprises.