海河流域中部表层沉积物中重金属分布特征及污染评价  

Distribution characteristics and pollution assessment of heavy metals in the surface sediments in the middle of Haihe River Basin

作　　者：王利娜 周俊丽[1,2] 赵艳芳 李丹[1,2] WANG Lina;ZHOU Junli;ZHAO Yanfang;LI Dan(State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;State Environmental Protection Key Laboratory of Estuarine and Coastal Research,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]中国环境科学研究院国家环境保护地下水污染模拟与控制重点实验室,北京100012 [2]中国环境科学研究院国家环境保护河口与海岸带环境重点实验室,北京100012

出　　处：《水资源保护》2021年第5期147-152,共6页Water Resources Protection

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07301-002)。

摘　　要：为了解海河流域中部表层沉积物中重金属分布特征和污染现状,分别测定了17个采样点表层沉积物中Cr、Ni、Cu、Zn、As、Cd、Hg、Pb共8种重金属元素质量比,并采用相关性分析法、富集系数法、地累积指数法分析其同源性、污染来源及污染程度。结果表明:海河流域中部表层沉积物中重金属质量比整体上较历史水平有所下降,8种重金属元素的污染系数从高到低依次为Cd(1.98)、Hg(1.80)、Cu(1.37)、Zn(1.18)、Pb(1.12)、Ni(1.07)、Cr(1.02)、As(0.77),Cd污染相对严重;Cd和Hg的富集系数平均值均高于1.5,污染来源以人为输入为主,其余6种重金属元素则主要以自然来源为主;海河流域中部重金属总体上污染较轻,个别点位污染等级达到中度污染。In order to understand the distribution characteristics and pollution status of heavy metals in the surface sediments in the middle of Haihe River Basin,the mass ratios of Cr,Ni,Cu,Zn,As,Cd,Hg and Pb in the surface sediments of 17 sampling sites were determined.The homology,pollution source and pollution degree were analyzed by correlation analysis method,enrichment coefficient method and geoaccumulation index method.The results show that the heavy metal mass ratios in the surface sediments in the middle of Haihe River Basin generally decreased compared with the historical level and the pollution coefficients of eight heavy metals were Cd(1.98),Hg(1.80),Cu(1.37),Zn(1.18),Pb(1.12),Ni(1.07),Cr(1.02)and As(0.77)from high to low,wherein Cd pollution was relatively serious;The average enrichment factor values of Cd and Hg were higher than 1.5 with the pollution source mainly from human input,while the rest six heavy metals were mainly from natural sources.The pollution of heavy metals in the middle of Haihe River Basin was relatively light in general with moderate pollution levels at some sites.

关 键 词：重金属 表层沉积物 富集系数 地累积指数 污染评价 海河流域 

分 类 号：TV213.4[水利工程—水文学及水资源] X521[环境科学与工程—环境工程]