新疆塔里木盆地东南缘红枣产地土壤重金属污染及健康风险评价  

Heavy metal pollution and health risk assessment of the jujube producing area on the southeastern margin of the Tarim Basin in Xinjiang

作　　者：陈云飞 周金龙[2] 胡艳[1] 曾妍妍[2] 王松涛 杜江岩 孙英 CHEN Yunfei;ZHOU Jinlong;HU Yan;ZENG Yanyan;WANG Songtao;DU Jiangyan;SUN Ying(Tuojiang River Basin High-Quality Development Research Center of Neijiang Normal University,Neijiang,641100,China;College of Water Conservancy and Civil Engineering of Xinjiang Agricultural University,Urumqi,830052,China;No.2 Hydrogeology and Engineering Geology Party of Xinjiang Bureau of Geology and Mineral Resources Exploration and Development,Changji,831100,China)

机构地区：[1]内江师范学院沱江流域高质量发展研究中心,内江641100 [2]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [3]新疆地矿局第二水文地质工程地质大队,昌吉831100

出　　处：《环境化学》2022年第11期3629-3639,共11页Environmental Chemistry

基　　金：中国地质调查局中央返还两权款资金项目(S15-1-LQ);内江师范学院校级项目(2020YB31)资助.

摘　　要：以新疆塔里木盆地东南缘红枣产地为研究区,采集土样及对应红枣样品73组,分析了土壤-红枣系统中八种重金属元素(Cd、Hg、As、Pb、Cr、Cu、Ni、Zn)的含量特征、生物富集程度和土壤重金属污染现状;利用Crystal ball软件拟合土壤和红枣中重金属含量分布模型,实现在经口摄入的暴露途径下的基于蒙特卡洛不确定性模拟的健康风险评价.结果表明,研究区8种土壤重金属含量未超过农用地土壤污染风险筛选值,Cd、Hg、As、Cr和Ni元素含量均值高于新疆土壤背景值.土壤重金属综合污染指数均值为0.38,属于安全状态,且末县土壤重金属污染综合指数最高.研究区8种重金属元素生物富集能力表现为Cu>Zn>Hg>Cd>Ni>Pb>As>Cr,其中Cu的平均富集系数为0.1242.研究区红枣重金属在经口摄入的暴露途径下的非致癌健康综合指数为0.01(HI<1),不存在非致癌风险,致癌因子As和Hg对人体没有构成致癌威胁.73 soil samples and corresponding jujube samples were collected from the jujube producing area in the southeastern margin of the Tarim Basin in Xinjiang.The content characteristics,bioaccumulation and soil heavy metal pollution status of eight heavy metal elements(Cd,Hg,As,Pb,Cr,Cu,Ni,Zn)were analyzed.The Crystal ball software was used to fit the distribution model of heavy metals in soil and jujube to realize the health risk assessment of heavy metals based on Monte Carlo uncertainty simulation under the exposure route of oral intake.Results showed that the average contents of eight soil heavy metals did not exceed the soil pollution risk screening values of agricultural land,and the average contents of Cd,Hg,As,Cr and Ni elements were higher than the background value of Xinjiang soil.The average pollution index of soil heavy metals was 0.38,which presented a security state,and the soil pollution comprehensive index in Qiemo County was the highest.The bioconcentration ability of eight heavy metal elements followed a descending order of Cu,Zn,Hg,Cd,Ni,Pb,As and Cr,and the average enrichment coefficient of Cu was 0.1242.The non-carcinogenic health risk index of heavy metal in jujube under the oral exposure route was 0.01,which was lower than 1.The eight soil heavy metals did not present noncarcinogenic risk to human health.The carcinogenic factors As and Pb did not pose a carcinogenic threat to the human.

关 键 词：重金属 红枣产地 污染评价 健康风险评价 蒙特卡洛模拟 塔里木盆地东南缘 

分 类 号：X53[环境科学与工程—环境工程] X820.4