我国东北某铅锌矿矿区周边农田土壤铅暴露的儿童健康风险评估  

Risk Assessment of Children Exposed to Lead in Soil Around a Lead-Zinc Mine in Northeast China

作　　者：王英刚[1] 谷成阳 苏一鸣 吴昊[1] 李研 WANG Yinggang;GU Chengyang;SU Yiming;WU Hao;LI Yan(Key Laboratory of Regional Pollution and Ecological Restoration,Ministry of Education,Shenyang University,Shenyang 110044,China;Liaoning Ecological and Environmental Affairs Service Center,Shenyang 110161,China)

机构地区：[1]沈阳大学区域污染环境生态修复教育部重点实验室,辽宁沈阳110044 [2]辽宁省生态环境事务服务中心,辽宁沈阳110161

出　　处：《沈阳大学学报（自然科学版）》2022年第5期346-353,共8页Journal of Shenyang University：Natural Science

基　　金：国家水体污染控制与治理科技重大专项(2018ZX07601);辽宁省科学技术计划项目(2019ZD0862)。

摘　　要：调查了我国东北地区某铅锌矿矿区周边农田土壤中Pb的质量分数,采用单因子污染指数法、地质累积指数法以及本土暴露参数优化后的IEUBK模型对矿区周边农田土壤儿童Pb暴露风险进行了评估。结果表明,矿区周边农田土壤中0~0.5 m土壤中Pb的质量浓度均超过《土壤环境质量农用地土壤污染风险管控标准(试行)》(GB 15618-2018)所规定的土壤风险筛选值,部分点位超过管制值。0~0.2 m土壤中的Pb使儿童血铅质量浓度大于5%限值的概率为10.290%,0.2~0.5 m中土壤中的Pb使儿童血铅质量浓度大于5%限值的概率为10.259%。研究区周边农田土壤Pb污染严重,已经对当地儿童健康造成一定威胁,且农田土壤中Pb的质量分数极易受到人为活动的影响,Pb污染围绕矿山以及盛行风下风向扩散,并有沿河谷地形向河流下游积累的趋势,影响从大到小依次为人为活动、地形、盛行风向。The mass fraction of Pb in agricultural soils around a Pb-Zn mine in northeast China was investigated,and the risk of children s Pb exposure in agricultural soils around the mine was assessed using the single-factor contamination index method,the geological accumulation index method and the IEUBK model optimized for indigenous exposure parameters.The results showed that the mass concentrations of Pb in 0~0.5 m soil in the farmland soils around the mine area all exceeded the soil risk screening values specified in the Soil Environmental Quality Risk Control Standards for Soil Contamination of Agricultural Land(Trial)(GB 15618-2018),and some points exceeded the control values.The probability of Pb in 0~0.2 m soil causing children s blood Pb concentrations greater than the 5%limit was 10.290%.The probability that Pb in soils from 0.2 to 0.5 m will cause blood Pb concentration in children to be greater than the 5%limit was 10.259%.The Pb pollution in the farmland soil around the study area was serious and had posed a certain threat to the health of local children,and the mass fraction of Pb in the farmland soil was highly susceptible to the influence of anthropogenic activities,and the Pb pollution spreads around the mines and downwind of the prevailing wind,and had a tendency to accumulate along the river valley topography to the downstream of the river,and the influence was in the order of anthropogenic activities,topography,and prevailing wind direction.

关 键 词：铅锌矿 农田土壤 PB污染 血铅 健康风险评价 

分 类 号：X53[环境科学与工程—环境工程] X828