霍邱县城湖泊沉积物重金属污染特征、潜在生态风险及来源  

Pollution characteristics,potential ecological risks and sources of heavy metal pollution in lake sediments in Huoqiu County

作　　者：刘海[1] 魏伟 宋阳 潘杨 李迎春 LIU Hai;WEI Wei;SONG Yang;PAN Yang;LI Yingchun(Public Geological Survey Management Center in Anhui Province,Hefei 230091,China;College of Architecture and Urban-Rural Planning,Sichuan Agricultural University,Chengdu 611830,China)

机构地区：[1]安徽省公益性地质调查管理中心,安徽合肥230091 [2]四川农业大学建筑与城乡规划学院,四川成都611830

出　　处：《地学前缘》2024年第3期420-431,共12页Earth Science Frontiers

基　　金：安徽省自然资源厅公益性项目(2018-g-1)。

摘　　要：为了解霍邱县城西湖和城东湖表层沉积物重金属的污染特征、空间分布、潜在来源和生态风险,对城西湖和城东湖表层沉积物重金属(As、Cd、Cr、Cu、Hg、Ni、Pb和Zn)含量进行了分析,采用地累积指数法、污染负荷指数法、潜在生态危害指数法和沉积物质量基准法对重金属污染程度及潜在生态危害进行了评价,并利用相关性分析、聚类分析及主成分解析了重金属来源。结果表明,除城东湖的Cd、Hg、Pb和城西湖的Hg外,其余元素均值超过背景值,重金属含量存在显著的空间变异性,大致呈北向南递减趋势。地累积指数表明城西湖沉积物中Ni和Zn处于未受污染中度污染状态,污染负荷指数显示城西湖为中度污染状态,城西湖和城东湖处于轻度生态风险状态。重金属溯源分析结果显示城西湖和城东湖沉积物中Cr、Zn、Ni和Cu主要来源成土母质、矿产开采和水产养殖,As、Pb、Hg和Cd主要来源于农业污染和生活污水。研究结果可为城西湖和城东湖重金属污染防治提供科学依据。The contents of heavy metals(As,Cd,Cr,Cu,Hg,Ni,Pb,Zn)in surface sediments of Chengxi Lake and Chengdong Lake were measured To understand the pollution characteristics,spatial distribution,potential sources,and ecological risks of heavy metals in surface sediments of Chengxi Lake and Chengdong Lake in Huoqiu County.The soil accumulation index,pollution load index,potential ecological hazard index,and sediment quality reference method were used to evaluate the pollution degree and potential ecological hazard of heavy metals.The sources of heavy metals were analyzed by correlation analysis,cluster analysis,and principal component analysis.The results showed that except for Cd,Hg,Pb in Chengdong Lake and Hg in Chengxi Lake,the average values of other elements exceeded the background values,and the content of heavy metals showed significant spatial variability,decreasing from north to south.The soil accumulation index indicates that Ni and Zn in sediments of Chengxi Lake are in a state of unpolluted to moderate pollution.The pollution load index indicates that the sediments of Chengxi Lake are in a state of moderate pollution,and the sediments of Chengxi Lake and Chengdong Lake are in a state of mild ecological risk.The results of heavy metal traceability analysis show that Cr,Zn,Ni,and Cu in the sediments of Chengxi Lake and Chengdong Lake are mainly from the parent material,mineral exploitation,and aquaculture,while As,Pb,Hg,and Cd are mainly from agricultural pollution and domestic sewage.The results can provide a scientific basis for the prevention and control of heavy metal pollution in Chengxi Lake and Chengdong Lake.

关 键 词：城西湖 城东湖 表层沉积物 重金属 污染特征 潜在生态风险 

分 类 号：X54[环境科学与工程—环境工程] X508X524X131