太行山南麓金属冶炼区土壤环境质量评价  

Soil environment quality of the metal smelting area in the south foot of Taihang Mountains

作　　者：杜丽伟[1] 冯新伟[1] 杨素勤[1] 张少凯[1] 张宁[1] 郭正磊 李玲[1] 

机构地区：[1]河南农业大学资源与环境学院,河南郑州450002

出　　处：《河南农业大学学报》2015年第2期254-261,共8页Journal of Henan Agricultural University

基　　金：国家自然基金项目(41201209);河南省教育厅科学技术研究重点项目(13A210495)

摘　　要：以太行山南麓典型金属冶炼区为例,对其周边农田土壤—小麦系统重金属Pb、Cd、As和Hg含量进行了测定分析,依据相关质量标准,按照单因子污染指数法、地积累指数法及其综合指数法对土壤环境质量进行评价,利用克里格插值法对土壤重金属污染的空间变异特征进行了分析,并依据土壤—小麦系统重金属相关性,确定最终评价结果。结果表明,研究区土壤各重金属含量均值均超过当地土壤背景值,重金属Cd和Pb超标严重,且各重金属含量空间变异程度较大;单因子污染指数法评价结果表明研究区重金属污染程度Cd>Pb>As>Hg,污染指数分别为4.58、3.57、0.99和0.18,其综合污染指数3.97,属重度污染;地积累指数法评价结果为Cd>Pb>Hg>As,污染指数分别为4.06、2.53、1.47和0.31,地积累综合污染指数3.25,属强污染水平;2种评价方法中关于重金属Hg评价结果存在差异,依据土壤—小麦系统间重金属相关性,最终确定以单因子污染指数法及其综合污染指数法评价结果为研究区土壤环境质量评价结果。Taking the metal smelting area in Taihang Mountains for an example,the contents of soil-wheat heavy metal Pb、Cd、As and Hg in the surrounding farmland were tested and analyzed. On the basis of the relevant quality standards and according to the single factor index,geoaccumulation index and their comprehensive index,the spatial variability of the soil environment quality in the study area was analyzed with the kriging interpolation method. The final evaluation results were determined based on the correlation of soil- wheat system. The results showed that the average content of each heavy metal exceeds the local background value and especially Cd and Pb exceeded the standard seriously,furthermore,each the content of heavy metal varies greatly. The order of single factor pollution index is Cd 〉Pb 〉As〉 Hg and it is respectively 4. 58,3. 57,0. 99 and 0. 18. The Nemerow multi-index is3. 97,belonging to heavy pollution grade. The order of geoaccumulation index is Cd 〉Pb 〉Hg 〉As and it is respectively 4. 06,2. 53,1. 47 and 0. 31. The geoaccumulation composite index is 3. 25,belonging to strong pollution level. Because of the different evaluation standard,heavy metal Hg ＇s evaluation result is different. In consideration of the heavy metals＇ correlation between soil and wheat system,in the end we determined the results of single factor index and nemerow multi- factor index asthe soil environmental quality assessment results in the study area.

关 键 词：重金属污染 单因子污染指数法 地积累指数法 综合污染指数法 空间变异 

分 类 号：X825[环境科学与工程—环境工程]