冶炼厂周边表层土壤重金属关联特征及污染评价  

Correlation characteristics and pollution evaluation of heavy metals in surface soil around a smelting factory

作　　者：王成军[1] 冯涛[1] 赵舒婷[1] 任洋明 刘勇[1,3] 

机构地区：[1]西安建筑科技大学管理学院,西安710055 [2]西安建筑科技大学材料与矿资学院,西安710055 [3]西安建筑科技大学理学院,西安710055

出　　处：《环境工程学报》2016年第4期2064-2070,共7页Chinese Journal of Environmental Engineering

基　　金：环保部公益性行业科研专项(201109053)

摘　　要：以冶炼厂为中心设定27个取样点,检测27个取样点表层土壤中的Cr、Cu、Zn、Pb、As、Cd和Hg 7种重金属浓度,根据国家规定土壤环境质量标准值,使用单因子分析法、内梅罗污染指标分析法以及统计软件对检测数据进行分析评价,结果表明,该区域大部分土壤中重金属浓度超出标准值,其中污染程度排序为Cd>Hg>Pb>Zn>Cr>Cu>As,Cr、Cu、Cd与Zn、Pb相关性显著,都有相同的污染源,并且土壤中重金属污染的程度与地势高低、风向以及冶炼厂都有密切关系。可初步判断重金属污染的来源以及原因,这对治理和防控土壤重金属污染有重要意义。Twenty-seven sampling points were selected from around a smelting factory,and measurements were taken from the surface soil of seven heavy metal concentrations： Cr,Cu,Zn,Pb,As,Cd,and Hg. According to the provisions of the national soil environmental quality standard,in this study,we used the single factor analysis method,the Nemerow pollution index analysis method,and statistical analysis software. The following results were obtained： a majority of heavy metal concentrations in the soil samples exceeded the national standard; the degree of pollution was Cd〉Hg〉Pb〉Zn〉Cr〉 Cu〉 As; and the Cr,Cu,and Cd levels correlated with Zn and Pb levels. Further,all heavy metal pollution was found to originate from the same source. In addition,a relationship was determined between heavy metal pollution in soil at a high terrain,the wind direction,and smelters. Thus,this study presents a preliminary investigation of heavy metal pollution sources and causes,which could be of great importance in the management and control of heavy metal pollution in soil.

关 键 词：土壤 重金属污染 单因子分析法 内梅罗污染指标 关联特征 

分 类 号：X82[环境科学与工程—环境工程]