金川矿区表土金属空间污染特征及磁学响应  

Spatial pollution characteristics and magnetic response of surface soil heavy metals in Jinchuan mining area

作　　者：王冠[1] 辛倩 马丽娟 王阳阳 姚文 朱鑫钰 任非凡[3] WANG Guan;XIN Qian;MA Li-juan;WANG Yang-yang;YAO Wen;ZHU Xin-yu;REN Fei-fan(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Resources,Environment and Engineering,East China University of Science and Technology,Shanghai 200237,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]华东理工大学资源环境与工程学院,上海200237 [3]同济大学地下建筑与工程系,上海200092

出　　处：《中国环境科学》2021年第9期4211-4220,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(41874077)。

摘　　要：采集金川铜镍矿区及周边表层土壤样品26个,基于环境磁学方法对样品开展了金属元素(Cu、Ni、Cr、Fe、Sr、Ti、Pb和Mn)的含量分析及相关分析,采用单因子污染指数和内梅罗污染指数评价方法对研究区域表土金属污染状况进行评价.研究区域表土磁学特征与金属元素含量呈明显空间分布差异,体现为:矿区源地>加工区域>繁忙路段>门岗区域>其他区域;受Cu和Ni元素污染的土壤样品为重度污染,Cr、Pb、Ti、Sr等金属为轻度污染和中度污染;χ_(lf)、SIRM、χ_(ARM)和HIRM数值相对较高,表明研究区域亚铁磁性矿物含量较高;研究区表层土壤样品磁晶粒度特征以较粗的假单畴(PSD)和多畴(MD)颗粒为主导;相关分析结果表明Cu、Ni、Cr、Fe、Pb和Mn元素之间皆存在较好的相关性,其中Cu、Ni显著(R=0.91);χ_(lf)和SIRM、χ_(ARM)与各金属的相关性较为突出(0.52≤R≤0.78),表明磁参数可有效监测城市表土重金属污染状况,快速圈定重金属污染的区域与范围,为城市表土污染监测工作提供快速有效的数据支持.26surface soil samples were collected from the Jinchuan mine area.Environmental magnetism and heavy metal element(Cu,Ni,Cr,Fe,Sr,Ti,Pb and Mn)content analysis were related analysis on the samples,and carried out by using single factor pollution index and Nemero pollution index evaluation methods to evaluate the heavy metal pollution degree.The magnetic characteristics of the surface soil and the content of heavy metal elements showed obvious spatial distribution differences:mine area>outer processing area>high traffic section>gate area>other areas.The samples were contaminated up to 100% by Cu and Ni,showing the high levels of pollution.While metal pollution of Cr,Pb,Ti,and Sr was between the warning line and moderate pollution.Then,the values ofχ_(l)､SIRM、χ_(ARM) and HIRM were relatively high,indicating that the content of magnetic mineral particles was extremely high,and the magnetic particles were dominated by ferrimagnetic mineral types.The magnetic grain size characteristics of the surface soil samples were dominated by coarser pseudo-monodomain(PSD)and multi-domain(MD)particles.Correlation analysis results were shown that there was an excellent correlation between Cu、Ni、Cr、Fe、Pb and Mn,especially,the correlation of Cu、Ni was excellent(R=0.91)among them.χ_(lf),SIRM,and χ_(ARM) had an excellent correlation with various metals(0.52≤R≤0.78),it showed that the heavy metal pollution of urban surface soil was effectively monitored by magnetic parameters,quickly delineating the area and scope of heavy metal pollution,and providing rapid and effective data support for urban surface soil pollution monitoring.

关 键 词：矿区表土 环境磁学 重金属污染 相关分析 

分 类 号：X53[环境科学与工程—环境工程]