东北典型煤矿区土壤重金属健康评价

Health Evaluation of Soil Heavy Metals in Typical Coal Mining Areas in Northeast China

针对东北典型煤矿区土壤进行了健康风险评价。共采集38个地表(0~20 cm)样品,分别采用Excel 2010进行统计分析,ArcGIS 10.3绘制空间分布图,选择经口摄入作为人类潜在有毒元素的优先暴露途径对土壤进行了健康风险评价(非致癌和致癌),对样品的Cd、Cr、Cu、Ni、Pb、Zn元素进行了健康风险评价与分析。结果表明:针对儿童位于煤矸石堆积区的2点Zn元素非致癌风险系数大于1,对附近儿童健康产生不良影响;而针对成人则并无非致癌风险。致癌风险评价结果显示:Pb的Risk值均小于10-6,儿童致癌风险水平集中在10-7~10-8之间,成人致癌风险水平集中在10-8~10-9之间,Pb污染对周边居民健康不构成致癌风险。

In this paper,the soil health risk assessment of typical coal mining ereas in Northeast China was carried out.The total 38 samples of the surface(0~20 cm)were analyzed using Excel 2010.ArcGIS 10.3 was used to draw spatial distribution maps.Oral intake was selected as the priority exposure route for human potential toxic elements to conduct health risk assessment on the soil(non-carcinogenicity and carcinogenicity).The health risk assessment and analysis of the Cd,Cr,Cu,Ni,Pb,and Zn elements in the samples were carried out.The results show that the non-carcinogenic risk coefficient of 2 Zn elements for children located in the gangue accumulation area is greater than 1,which has adverse effects on the health of nearby residents.For adults,there is no risk of cancer.Carcinogenicrisk evaluation results show that Pb risk values are less than 10-6;the carcinogenic risk levels of children were concentrated in the range of 10-7~10-8,and the carcinogenic risk levels of adults were concentrated in the range of 10-8~10-9.Pb pollution on surrounding residents’health does not constitute a risk of carcinogenicity.