Taking an abandoned iron and steel plant as the research site,shallow groundwater samples were collected for analyzing the spatial distribution characteristics,sources and impacts on human health of 8 ele-ments(Cr,Cd,Fe,Mn,As,Zn,Ni,Cu).The results showed that the mean measurements of Fe and Mn in groundwater of the study area were higher than Class Ⅲ standard limits for groundwater.The contents of 8 elements were different in spatial distribution,which were higher in the central region than in the eastern re-gion,with the exception of Zn.There were 4 sources of the 8 elements,namely mixed source of fossil fuel com-bustion and wastewater discharge,dustfall source,natural source and emission source from steelmaking.Drink-ing water intake was the main exposure route in the study area.Non-carcinogenic comprehensive risk values for adults and children were both less than 1,within acceptable range.The ILCR of As for adults was higher than the maximum acceptable risk value of 1 × 10-4,indicating a potential carcinogenic risk.
关键词
重金属/分布特征/来源解析/健康风险评价/地下水
Key words
Heavy metals/Distribution characteristics/Source analysis/Health risk assessment/Ground-water
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