摘要
于2023年11月在新疆博斯腾湖湿地采集22个沉积物样品,测定As、Cd、Cr、Cu、Hg、Ni、Pb和Zn 8种重金属元素含量,采用地累积指数、富集因子、潜在生态风险指数、蒙特卡洛模拟和人体健康风险评价模型分别对沉积物重金属污染、潜在生态风险程度和人体健康风险进行评估。结果表明:(1)博斯腾湖湿地沉积物Zn、Cd、Cr、Pb和Hg含量平均值分别为新疆土壤背景值的1.01、3.58、1.32、1.94和1.53倍。(2)地累积指数与富集因子评价结果均表明,沉积物重金属污染程度大小顺序依次为:Cd>Pb>Hg>Cr>Zn>Cu>Ni>As。(3)重金属元素单项生态风险指数平均值大小顺序依次为:Cd>Hg>Pb>Cu>Ni>Cr>As>Zn;综合生态风险指数平均值为184.07,处于中等生态风险态势。(4)研究区域的沉积物中重金属污染会对不同人群的健康造成危害,存在非致癌风险和不可接受的致癌风险。成年男性、成年女性和儿童面临的非致癌风险概率分别为21.24%、23.50%和36.27%,Cr和Cd为主要的非致癌风险物质;成年男性、成年女性和儿童遭受不可接受的癌症暴露风险的概率分别为2.76%、7.74%和10.50%,其主要的致癌风险物质为As和Cr。
In November 2023,22 sediment samples were collected from the wetland of Lake Bosten in Xinjiang,and the contents of 8 heavy metals,including As,Cd,Cr,Cu,Hg,Ni,Pb,and Zn,were determined.Geo-accumulation index,enrichment factor,potential ecological risk index,Monte Carlo simulation,and human health risk assessment model were used to assess the pollution,potential ecological risk,and the human health risk of the heavy metals in the sediments.The results showed that:(1)The average contents of Zn,Cd,Cr,Pb,and Hg in the wetland sediments of Lake Bosten were 1.01,3.58,1.32,1.94,and 1.53 times higher than the background values of Xinjiang soil,respectively.(2)Both geo-accumulation index and enrichment factor evaluations showed that the pollution degree of heavy metals in sediments was ranked as:Cd>Pb>Hg>Cr>Zn>Cu>Ni>As.(3)The average value of the single ecological risk index of heavy metal elements was ranked as:Cd>Hg>Pb>Cu>Ni>Cr>As>Zn.The average value of the comprehensive ecological risk index was 184.07,which was in a medium ecological risk situation.(4)Heavy metal pollution in sediments of this research area will cause health risks to different populations,including non-carcinogenic risks and unacceptable carcinogenic risks.The probabilities of non-carcinogenic risks for adult men,adult women,and children were 21.24%,23.50%and 36.27%,respectively,with Cr and Cd being the main non-carcinogenic risk substances.The probabilities of unacceptable cancer exposure risks for adult men,women,and children were 2.76%,7.74%and 10.50%,respectively,with As and Cr as the main carcinogenic risk substances.
作者
王凯
迪丽努尔·阿吉
李平平
胡丛巧
彭清清
康佳佳
Wang Kai;Dilinuer•Aji;Li Pingping;Hu Congqiao;Peng Qingqing;Kang Jiajia(School of Geography and Tourism,Xinjiang Normal University,Urumqi 830054,P.R.China;Key Laboratory of Lake Environment and Resources in Arid Area of Xinjiang,Urumqi 830054,P.R.China)
出处
《湖泊科学》
北大核心
2025年第3期860-871,I0007,I0008,共14页
Journal of Lake Sciences
基金
国家自然科学基金项目(42361006)资助。
关键词
蒙特卡洛模拟
重金属
沉积物
博斯腾湖湿地
风险评价
Monte Carlo simulation
heavy metal
sediment
Lake Bosten wetland
risk assessment
