南水北调中线工程焦作段滨河地带土壤重金属污染风险评价  

Risk assessment of heavy-metal pollution in riverside soil of Jiaozuo segment in the Middle Route of South-to-North Water Transfer Project

作　　者：辛佳桧 李明秋[1] 马守臣[1] 张雄坤 胡文智 孙瑞 段佩玲[2] XIN Jiahui;LI Mingqiu;MA Shouchen;ZHANG Xiongkun;HU Wenzhi;SUN Rui;DUAN Peiling(College of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Department of Pharmacy,Zhengzhou Railway Vocational&Technical College,Zhengzhou 450052,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454000 [2]郑州铁路职业技术学院药学系,郑州450052

出　　处：《南水北调与水利科技》2018年第6期109-118,共10页South-to-North Water Transfers and Water Science & Technology

基　　金：河南省科技攻关项目(162102110169);河南理工大学创新型科研团队资助(B2017-16);河南省高校教师科技创新团队(18IRTSTHN008)~~

摘　　要：以南水北调中线工程焦作段为研究区,通过野外调查和室内分析的方法,采集总干渠流经的农业区、市区、工矿区的滨河地带土壤样本,分别测定重金属Cr、Ni、Cu、Zn、As、Cd、Hg、Pb的质量分数,利用单因子污染指数法、Nemerow内梅罗污染指数法和Hakanson综合潜在生态风险指数评价研究区的重金属污染状况及其潜在生态风险。结果表明,与《土壤环境质量标准》中的Ⅱ级标准(pH>7.5)相比,主要重金属污染风险元素为Cd。农业区、市区、工矿区的内梅罗污染指数分别为37.56、36.65、37.98,且均处于重度污染水平。三个区段的综合潜在风险指数分别为41 823.39、18 973.18、19 659.09,均具有很强的生态风险。综合分析表明,南水北调焦作段总干渠依次流经的农业区、市区、工矿区滨河地带均受到不同程度的土壤重金属污染,以工矿区污染最为严重,对干渠的水质安全造成极大威胁,该研究结果对南水北调焦作段水质安全防护及滨河地带土壤污染治理具有重要意义。Taking Jiaozuo segment in the Middle Route of South-to-North Water Transfer Project as the study area,using field investigation and experimental analysis,we collected soil samples from the industrial and mining area,urban area,and agricultural area along the main canal,measured the content of heavy metals(Cr,Ni,Cu,Zn,As,Cd,Hg,and Pb)in the soil,and evaluated the condition of heavy-metal pollution and its potential ecological risks using the single factor pollution index,Nemerow pollution index,and Hakanson comprehensive potential ecological risk index.The results showed that,according to the GradeⅡcriteria of the Standard for Soil Quality(pH>7.5),the main heavy-metal pollution risk element was Cd.The Nemerow pollution index of the agricultural area,urban area,and industrial-mining area was 37.56,36.65,and 37.98,respectively,all reaching severe pollution level.The comprehensive potential risk index of the three areas was 41 823.39,18 973.18,and 19 659.09,respectively,all posing high ecological risks.The analysis results showed that the soil of the agricultural area,urban area,and industrial-mining area along the main canal are all contaminated by heavy metals to different degrees.The industrial-mining area has the most serious pollution,which posed a great threat to the water quality safety of the canal.The above results are of important significance to water quality protection and soil pollution control in the riverside area of Jiaozuo segment of the South-to-North Water Transfer Project.

关 键 词：南水北调工程 中线工程 滨河地带 土壤污染 风险评价 

分 类 号：X825[环境科学与工程—环境工程]