摘要
文章选取赣南某历史遗留铅锌矿选矿厂为研究对象,测定了土壤中As、Cd、Pb等14种重金属含量,运用单因子指数法(P_(i))、内梅罗综合污染指数法(P_(N))、地累积指数法(I_(geo))分析土壤重金属污染特征,并利用潜在生态风险指数和场地风险评估模型评价研究区风险状况。结果表明,对比我国建设用地土壤二类用地风险管控筛选值,土壤中As、Cd、Pb、Zn的超标率分别为76.6%、6.38%、27.66%、2.13%。选矿厂土壤污染情况已经达到重度污染水平,重金属的污染程度由大到小依次为:As>Cd>Pb>Zn。潜在生态风险指数计算得出,该研究区处于极高生态风险状态,潜在综合生态风险指数达到1892.40。污染场地风险评估计算模型和血铅模型结果表明,在非敏感地类型下土壤中的重金属As、Pb、Cd其风险均超过可接受水平。综上,该类地块应重点关注As、Pb和Cd的污染防控。
A lead-zinc mining area in southern Jiangxi was selected as the research object,a preliminary investigation and detailed investigation of the plot were carried out,In this research,soil contents of 14 heavy metals such as As、Cd、Pb were determined in a historical lead-zinc mining area in southern Jiangxi.At the same time,the pollution characteristic of heavy metals were accessed by methods of the single factor pollution index,Nemerow pollution index,geoaccumulation index and potential ecological risk index and health risk assessment were to evaluated the risk in this area.The results showed that the exceeding rates of As,Pb,Cd and Zn screening values of the second construction land were 76.6%,27.66%,6.38%and 2.13%.The single factor pollution index,Nemerow pollution index,and geoaccumulation index evaluations suggested that the soil was heavily polluted by the heavy metals,with the sequence of the result As is the highest,followed by Cd,Pb and Zn.The potential ecological risk assessment stated that RI was 1892.40,indicating a extremely ecological risk in this mining area.Health risk of As,Pb and Cd in the site all exceeded the acceptable risk level,which has threatened the human health.In summary,the pollution control and management should focus on the As,Pb and Cd in these type of sites.
作者
丁洁
彭香琴
区杰泳
陈岩贽
黄芯仪
李义豪
DING Jie;PENG Xiangqin;OU Jieyong;CHEN Yanzhi;HUANG Xinyi;LI Yihao(South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510000,China;School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510000,China)
出处
《环境保护科学》
CAS
2023年第5期24-30,共7页
Environmental Protection Science
基金
中央级公益性科研院所基本科研业务专项(PM-zx703-202305-269
PM-zx097-202305-180)。
关键词
铅锌矿区
土壤
重金属
污染特征
风险评价
Lead-zinc mining area
soil
heavy metal
pollution characteristic
health risk assessment
作者简介
丁洁(1992-),女,硕士、工程师。研究方向:土壤修复。E-mail:418024832@qq.com。
