盐碱农田土壤铬污染特征及健康风险评价--以山东省滨州市滨城区为例  

Characteristics of chromium soil pollution and health risk assessment in saline alkali farmland:A case study of Bincheng District,Binzhou City,Shandong Province,China

作　　者：王玥 刘莹雪 李丹丹[1] 何睿 王伟 刘月仙 陆兆华[1] 张萌[1] WANG Yue;LIU Yingxue;LI Dandan;HE Rui;WANG Wei;LIU Yuexian;LU Zhaohua;ZHANG Meng(School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China;Environmental Development Center of the Ministry of Ecology and Environment,Beijing 100029,China;Agro-Environmental Protection Institute,Ministry of Agriculture and Rural Affairs,Tianjin 300191,China;College of Resources and Environment,University of the Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]生态环境部环境发展中心,北京100029 [3]农业农村部环境保护科研监测所,天津300191 [4]中国科学院大学资源与环境学院,北京100049

出　　处：《农业环境科学学报》2021年第12期2723-2732,共10页Journal of Agro-Environment Science

基　　金：国家重点研发计划项目(2016YFC0503604,2016YFC0501108);煤炭开采水资源保护与利用国家重点实验室开放基金(SHJT-16-30.20)。

摘　　要：以山东省滨州市滨城区农村、郊区、城区3个区域的农田土壤为研究对象,分析各区域农田土壤重金属铬(Cr)的含量及分布特征,采用单因子污染指数(P_(i))与综合污染指数(P_(综))法对土壤重金属Cr污染水平进行评价,并根据人体健康风险评估模型对各区域Cr暴露的人体健康风险水平进行评估。研究结果表明:滨城区土壤重金属Cr含量范围为20.56~49.58 mg·kg^(-1),远低于土壤污染风险筛选值,均低于管制值,由高到低顺序依次为城区>郊区>农村,均处于清洁状态;以滨城区农村农田实测表层Cr含量平均值为背景值,P_(i)分析结果显示,城区、郊区、农村Cr含量超出背景值点位率分别为60%、56%、42%,P_(综)结果显示,超出背景值的点位率分别为53%、48%、45%。各区域土壤重金属Cr对儿童和成人均不造成非致癌风险、致癌风险和总风险。This study analyzed the content and distribution characteristics of chromium(Cr)in farmland soils,which was conducted for the farmland soils of each region in the rural,suburban and urban areas of Bincheng District.The signal factor pollution(P_(i))and comprehensive pollution indexes(P_(综))were used to evaluate the level of Cr soil pollution.The human health risk from Cr exposure in each region was evaluated according to the human health risk assessment model.The results showed that the Cr content in soil in the Bincheng District ranged from 20.56 mg·kg^(-1)to 49.58 mg·kg^(-1),which was lower than the screening value of soil pollution risk and the limiting value.The Cr content in urban areas was the highest,followed by that in suburban and rural areas,all of which were of clean grade.Using the average measured surface Cr content of rural farmland in Bincheng District as the background value,the P_(i)analysis results showed that the Cr content exceeding the background value in urban,suburban,and rural areas were 60%,56%,and 42%,respectively.Additionally,the point rate beyond the background value was 53%,48%,and 45%for urban,suburban,and rural areas,respectively.The results showed that there were no non-carcinogenic,carcinogenic,and total health risks from the current Cr content in the soil for all regions.

关 键 词：土壤重金属 Cr 滨城区 农田 污染特征 健康风险评价 

分 类 号：X8204.4[环境科学与工程—环境工程] X53