晋南某钢厂周边土壤重金属与磁化率分布规律及其相关性研究  

Distributions of soil heavy metal elements and magnetic susceptibility and their correlativity around a steel factory in southern Shanxi province

作　　者：陈轶楠[1] 张永清[1] 张希云[1] 马大龙[1] 杜静静[1] 李育鹏[1] 

机构地区：[1]山西师范大学城环学院,临汾041000

出　　处：《干旱区资源与环境》2014年第1期85-91,共7页Journal of Arid Land Resources and Environment

基　　金："十一五"国家科技支撑计划重点项目(2008BADA4B01)资助

摘　　要：通过对晋南某钢铁厂及周边86个表层土样和90个剖面土样重金属及磁化率的测定,分别对其分布规律及相关性特征进行了研究。结果表明:1)根据地质累积指数法,以山西省土壤环境背景值进行衡量,钢铁厂内部表层土壤污染严重且主要污染元素是Pb和Cr,重金属含量高的厂区磁化率值也较高;周边农田土壤Pb的积累相对明显,处于中度污染水平,土壤中的污染物已经超过本地背景值,部分土样磁化率值明显超过一般褐土的正常磁化率范围。2)剖面重金属元素含量与土壤磁化率值总体呈自上而下递减的相同趋势,且两者的垂向变化特征相似。3)运用Arcgis对归一化处理后的土壤重金属评价结果与磁化率值进行的空间描述直观的显示出了污染区域的一致性。相关性分析进一步表明研究区土壤磁化率值与重金属元素Pb,Zn的含量呈极显著正相关,与Cu的含量呈显著正相关。4)在对土壤重金属污染进行大规模区域调查时,可利用土壤磁化率对重金属的指示作用,选出磁化率变异重点区域后再进行化学分析方法测量。This study measured heavy metal contents and magnetic parameters of 86 surface soil samples and 90 profile soil samples.The soil samples were collected from the internals and surrounding of the steel factory which located in South of ShanXi.We not only analyzed the correlation between the heavy metal element contents and soil magnetic susceptibility values by using SPSS,but also described the heavy metal pollutions and soil magnetic susceptibility space distribution characteristics by using Arcgis.The results revealed that： ①According to geo accumulation index which was employed to assess the heavy metal pollution in studied area,the topsoil samples inside of the steel factory had already been polluted by Pb and Cr mainly,the area where with high content of heavy metals also showed high magnetic susceptibility values;Accumulation of Pb of the farmland soil samples around the factory was relatively obvious,contaminants in the soil were more than the local background values,magnetic susceptibility value in part of the soil samples significantly exceeded the general cinnamon soil＇s value range.②Both the magnetic susceptibility and heavy metal element contents decreased downwards in soil profiles,showing the same vertical variation tendency.③The spatial distribution of heavy metals in surface soil and the magnetic susceptibility characteristics indicated that the distribution range and heavy metal pollution susceptibility had great relevance.There were extremely significant correlations between the magnetic susceptibility and the contents of Pb and Zn,significant correlation between the magnetic susceptibility and the contents of Cu.④The soil magnetic susceptibility instructions for heavy metals in soil can be used in large-scale survey of soil pollution,select the Key areas from the magnetic susceptibility variation soil samples firstly,then to detection them by the measurement of chemical analysis methods.

关 键 词：晋南钢铁厂 重金属元素 磁化率 土壤 

分 类 号：X53[环境科学与工程—环境工程]