衡水湖底泥重金属元素分布特征及污染评价  

Distribution characteristics of heavy metal elements and pollution evaluation of sediment in Hengshui Lake

作　　者：张闯 王苒 孙勇刚 尚晓雨 杨阳 陈龙 董硕 刘泽 Zhang Chuang;Wang Ran;Sun Yonggang;Shang Xiaoyu;Yang Yang;Chen Long;Dong Shuo;Liu Ze(Land and Resources Survey Center,Hebei Bureau of Geology and Mineral Resources Exploration,Shijiazhuang 050085,China;Geological Survey Institute of Hebei,Shijiazhuang 050081,China)

机构地区：[1]河北省地质矿产勘查开发局国土资源勘查中心,河北石家庄050085 [2]河北省地质调查院,河北石家庄050081

出　　处：《能源与环保》2024年第1期64-68,75,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：以衡水湖底泥为研究对象,布设14个采样点进行采样测试,分析底泥中8项重金属元素(As、Hg、Cd、Cr、Pb、Ni、Cu、Zn)的分布特征,采用单项污染指数法和内梅罗污染指数法,评价底泥重金属污染程度。研究结果表明,As、Pb、Ni和Cu元素在湖心东、北部含量较高;Cd、Cr和Zn元素在湖心北部含量较高;Hg元素在湖心东部含量较高。单项污染指数评价表明,仅重金属元素Cd、Zn存在污染,污染程度分别为轻度污染和轻微污染,其余6项元素均为清洁。内梅罗综合指数评价表明,衡水湖底泥局部(Y3位置)存在重金属轻度污染,污染元素为Cd、Zn,其他区域为清洁。对底泥8项重金属含量进行相关性分析,其中Cd与Zn正相关性(P<0.01)最为显著,表明污染元素具有同源性。研究结果可为衡水湖重金属污染防治和生态修复提供科学依据。Taking the sediment of Hengshui Lake as the research object,14 sampling points were arranged for sampling and testing,and the distribution characteristics of 8 heavy metal elements(As,Hg,Cd,Cr,Pb,Ni,Cu,Zn)in the sediment were analyzed,and the single pollution index method and the Nemero pollution index method were used to evaluate the degree of heavy metal pollution in the sediment.The results showed that As,Pb,Ni and Cu elements were high in the east and north of the lake.The content of Cd,Cr and Zn elements was higher in the northern part of the lake.Hg was found in high concentrations in the eastern part of the lake.The evaluation of a single pollution index showed that only the heavy metal elements Cd and Zn were polluted,and the pollution degree was mild pollution and light pollution respectively,and the remaining six elements were clean.The comprehensive evaluation index of Nemero showed that there was light pollution of heavy metals in the sediment of Hengshui Lake(Y3 position),the polluted elements were Cd,Zn,and other areas were clean.The correlation analysis of 8 heavy metals in the sediment showed that the positive correlation between Cd and Zn was the most significant(P<0.01),indicating that the contaminated elements had homology.The results can provide scientific basis for the prevention and control of heavy metal pollution and ecological restoration in Hengshui Lake.

关 键 词：底泥 重金属元素 分布特征 污染评价 衡水湖 

分 类 号：X524[环境科学与工程—环境工程]