煤矿区重金属在土壤-小麦中的分布特征及土壤污染评价  

Distribution Characteristics of Heavy Metals in Soil-Wheat and Soil Pollution Evaluation in Coal Mine Area

作　　者：王丽 闵宁 WANG Li;MIN Ning(School of Resources and Civil Engineering,Suzhou University,Suzhou,Anhui 234000,China)

机构地区：[1]宿州学院资源与土木工程学院,安徽宿州234000

出　　处：《九江学院学报（自然科学版）》2018年第4期7-11,共5页Journal of Jiujiang University：Natural Science Edition

基　　金：安徽省2017年度省级大学生创新创业项目(编号201710379137);宿州学院2015科研平台开放课题(编号2015YKF11)的研究成果之一

摘　　要：为研究矿区农田土壤-小麦系统中重金属的污染,选择朱仙庄矿区为研究对象,对该区土壤、小麦幼苗植株中Cr、Ni、Cu、Zn、Cd和Pb的含量特征和富集转移系数进行分析。结果表明,土壤的重金属含量特征及污染评价显示A层Cd的含量变化范围最小,为0. 19～0. 35mg/kg,Cr的含量变化范围最大,为35. 2～90. 8mg/kg; B层含量变化范围最小的是Cd,为0. 12～0. 40mg/kg;含量变化范围最大的是Zn,为37. 5～96. 2mg/kg;地累积污染评价结果显示,A层Cd为轻污染-中污染,Cu为无污染-轻污染,而其他重金属都为无污染; B层Cd为无污染-中污染,而其他重金属都为无污染-轻污染。小麦重金属均值含量特征显示,金属含量情况数值在根中为Pb> Zn> Cu> Cr> Ni> Cd,茎中为Zn> Pb> Cu> Cr> Ni> Cd;叶中为Zn> Cu> Pb> Cr> Ni> Cd。生物富集转移系数显示,Pb的富集系数较大,迁移系数大小为Pb> Zn> Cu> Cd> Cr> Ni。In order to study the pollution of heavy metals in the farmland soil wheat system of the mining area,which choosing the mining area of Zhu Xian Zhuang Autonomous Region as the research object,the content characteristics and enrichment transfer coefficients of Cr,Ni,Cu,Zn,Cd and Pb in the soil and wheat seedlings in this area were analyzed. The analysis results showed that the soil heavy metal content and pollution evaluation showed that the contents of Cd in layer A was the least,which was from 0. 19 to 0. 35 mg/kg,while the range of Cr content was maxium from 35. 2 to90. 8 mg/kg; Also the minimum range of Cd content in layer B was 0. 12 to 0. 40 mg/kg,and the maximum content variation range was 37. 5 ～ 96. 2 mg/kg. The results of soil cumulative pollution assessment showed that the Cd in layer A was light pollution-middle pollution,while the Cu was pollution-free and light pollution,but other heavy metals were pollution-free,Cd in layer B was pollution-medium pollution,but other heavy metals were pollution-free pollution.The mean content of heavy metals in wheat showed that the metal content in the root was Pb > Zn > Cu > Cr > Ni >Cd; Also the metal content in the stem was Zn > Pb > Cu > Cr > Ni > Cd; While the metal content in the leaves was Zn > Cu > Pb > Cr > Ni > Cd. The bioaccumulation transfer coefficient showed that the enrichment factor of Pb was larger,and the migration coefficient was Pb > Zn > Cu > Cd > Cr > Ni.

关 键 词：土壤-小麦系统 重金属 分布特征 污染评价 

分 类 号：X53[环境科学与工程—环境工程]