南昌市主要湖泊沉积物重金属污染及生态风险评价  

Heavy Metal Pollution and Ecological Risk Assessment in Sediments of Major Lakes in Nanchang

作　　者：陈晨[1,2] 李逸平 曾立安 CHEN Chen;LI Yiping;ZENG Li'an(School of Resources and Environment,Nanchang University,Nanchang 330031,China;Taizhou Water Treatment Development Co.,Ltd.,Taizhou 318000,China)

机构地区：[1]南昌大学资源与环境学院,江西南昌330031 [2]台州市水处理发展有限公司,浙江台州318000

出　　处：《湖南生态科学学报》2023年第1期15-23,共9页Journal of Hunan Ecological Science

基　　金：国家自然科学基金青年科学基金项目(No.41402312)。

摘　　要：【目的】探究南昌市湖泊沉积物中重金属对周边环境的危害。【方法】对18个城市湖泊的沉积物样品重金属含量进行测定,并进行主成分和相关性分析。【结果】南昌市湖泊沉积物中Hg、As、Cd、Cr、Pb、Ni、Cu、Zn含量均值分别为0.108、11.69、0.27、73.81、41.74、27.47、27.16、94.13 mg/kg,均超出南昌市土壤元素背景值含量。【结论】南昌市湖泊沉积物中Hg、Cd、Cu、Zn的主要来源是矿山开采、冶炼、印染所产生的废水,农业生产和交通运输污染是As、Pb来源的主导因素,Cr、Ni污染与机械制造和化工生产密切相关。在风险评价结果中,Hg和Cd是南昌市18个主要湖泊中的主要重金属污染元素,市区湖泊的潜在生态风险要比郊区湖泊更高。【Objective】In order to explore the harm of heavy metals in lake sediments of Nanchang City to ecological environment.【Method】This paper analyzed the content of heavy metals in sediment samples of 18 urban lakes,and conducted principal component analysis and correlation analysis.【Result】The results showed that Hg,As,Cd,Cr,Pb,Ni,Cu and Zn contents in lake sediments of Nanchang City were 0.108,11.69,0.27,73.81,41.74,27.47,27.16 and 94.13 mg/kg,all exceeding the soil background values of Nanchang City.【Conclusion】The main source of Hg,Cd,Cu and Zn in lake sediments in Nanchang City was the waste water produced by mining,smelting,printing and dyeing.The leading factors of As and Pb sources were agricultural production and transportation pollution.Cr and Ni pollution is closely related to mechanical manufacturing and chemical production.In the results of the risk assessment,Hg and Cd were the main heavy metal pollution elements in 18 main lakes in Nanchang City,and the potential ecological risk of urban lakes is higher than that of suburban lakes.

关 键 词：湖泊沉积物 重金属 风险评估 源分析 南昌市 

分 类 号：X524[环境科学与工程—环境工程]