宿州市城市景区水域底泥重金属含量特征及生态风险评价  

Distribution and Ecological Risk Assessment of Heavy Metals in Sediment in Urban Scenic Area

作　　者：江雅琪 桂和荣[2] 陈晨[1,2] 王春雷 余浩 陈家玉 李晨 JIANG Yaqi;GUI Herong;CHEN Chen;WANG Chunlei;YU Hao;CHEN Jiayu;LI Cheng(School of Earth and Environment,Anhui University of Science and Technology,Huainan,232001,China;National Engineering Research Center of Coal Mine Water Hazard Controlling(Suzhou University),Suzhou,234000,China)

机构地区：[1]安徽理工大学地球与环境学院,淮南232001 [2]国家煤矿水害防治工程技术研究中心(宿州学院),宿州234000

出　　处：《环境化学》2021年第8期2410-2418,共9页Environmental Chemistry

基　　金：国家自然科学基金(41773100,41373095);淮北矿业集团股份有限公司(2020);皖北煤电集团股份有限公司(2020)研究课题资助.

摘　　要：城市景区水域是城市水环境的重要组成部分,但关于城市景区水域底泥重金属的研究相对较少。因此,本文在宿州市三角洲公园水域采集底泥,测定了其中8种重金属元素(Pb、U、V、Mn、Ni、Cr、Cu和Zn)的含量,并利用自组织神经网络(SOM)、相关性分析、聚类分析、对研究区重金属的空间分布、污染水平及来源进行研究。结果表明,位于公园外的采样点重金属含量大于公园内部采样点;潜在生态风险指数法及地累积指数评价结果显示,三角洲公园水域底泥处在较轻的污染状态;通过正定矩阵分解模型(PMF)解析出3种污染因子,包括农业源、工业源和自然源,其中农业源及工业源为研究区沉积物中重金属的主要来源。Urban scenic waters are an important part of the urban ecological environment,but there are relatively few studies on heavy metals in the sediments of urban scenic waters.therefore,surface sediments were collected from the waters of Delta Park in Suzhou City,testing the contents of Pb,U,V,Mn,Ni,Cr,Cu and Zn in surface sediments.ArcGIS,SOM and multivariate statistical analysis were used to study the spatial distribution,pollution levels and sources of heavy metals in the study area.The results showed that the heavy metal content of the sampling points in the estuary area was higher than that in the park;the potential ecological risk index and the geoaccumulation index evaluation results showed that the sediment of water area of the delta park was in a light pollution state;three pollution factors,including agricultural,industrial and natural sources,were analyzed by the positive matrix factorizing model,with contribution rates of 25.99%、37.45%and 36.58%respectively,of which agricultural and industrial sources were the main sources of heavy metals in the sediments of the study area.

关 键 词：沉积物 城市水域 重金属 分布特征 生态风险 源解析 宿州市 

分 类 号：X52[环境科学与工程—环境工程] X826