闭坑煤矿矸石山周边农用地土壤—小麦重金属污染特征  

Characteristics of heavy metal pollution in soil and wheat of agricultural land around gangue hills of closed pit coal mine

作　　者：鞠倩 马荣 刘威 王彦君[2,3] 章梅 何建国 JU Qian;MA Rong;LIU Wei;WANG Yan-jun;ZHAGN Mei;HE Jian-guo(Anhui Wanbei Coal-electricity Group Co.,Ltd.,Suzhou 23400,China;Jiangsu Design Institute of Geology and Mineral Resources(Testing Center of China National Administration of Coal Geology),Xuzhou 221006,China;Key Laboratory of Mineral Resources in Coal Measures,China National Administration of Coal Geology,Xuzhou 221006,China)

机构地区：[1]安徽省皖北煤电集团有限责任公司,安徽宿州234000 [2]江苏地质矿产设计研究院(中国煤炭地质总局检测中心),江苏徐州221006 [3]中国煤炭地质总局煤系矿产资源重点实验室,江苏徐州221006

出　　处：《煤炭科技》2024年第2期9-14,共6页Coal Science & Technology Magazine

基　　金：中国煤炭地质总局科研资助项目(ZMKJ-2020-J044);徐州市重点研发计划(社会发展KC20059)。

摘　　要：以皖北煤电某闭坑煤矿矸石山周边农田为研究对象,通过采集矸石山4个方位300 m范围内的土壤和对应的小麦样品,分析土壤重金属含量、空间分布特征以及小麦不同器官中重金属含量变化及迁移特征,根据小麦中金属含量建立了根系—茎—籽中重金属的迁移转化回归模型。研究结果表明:土壤中Cd、Hg、As、Cr、Ni、Cu、Zn等元素重金属含量均值均低于国家土壤二级标准;矸石山周边农地土壤重金属含量随迁移距离的增加整体呈下降趋势;小麦各器官中,籽实中Zn含量最高,杆径中Hg含量最高,As、Pb、Cr和Ni主要赋存于根系中,小麦中Cu和Zn迁移能力较强。根据小麦的根—茎—籽体系线性回归模型发现,Cu和Zn有着较强的迁移能力,Cr、Hg、Pb和Ni迁移能力较弱,As迁移能力极弱。Taking the farmland around the gangue mountain of a closed pit coal mine of Wanbei Coal-electricity as the research object,the soil and corresponding wheat samples within 300 m of the four directions of the gangue mountain were collected to analyse the heavy metal content of the soil,the spatial distribution characteristics,and the heavy metal content changes in different organs of the wheat and its migration characteristics,and the migration and transformation regression model of the heavy metals in the root system-stem-seed was established according to the metal content of the wheat.The results of the study showed that the average values of heavy metal contents of Cd,Hg,As,Cr,Ni,Cu and Zn in the soil were lower than the national soil secondary standards,and the heavy metal contents of the soil in the agricultural land around the gangue mountain showed a decreasing trend with the increase of migration distance.Among the various organs of wheat,the highest content of Zn was found in the seeds,and the highest content of Hg was found in the stem diameter.As,Pb,Cr,and Ni mainly existed in the roots,while Cu and Zn had strong migration ability in wheat.According to the linear regression model of the root-stem-seed system of wheat,it was found that Cu and Zn had strong migration ability.According to the linear regression model of the root-stem-seed system of wheat,it was found that Cu and Zn had strong migration ability,Cr,Hg,Pb and Ni had weak migration ability,and As had very weak migration ability.

关 键 词：矸石山 土壤 农作物 重金属 迁移 

分 类 号：X131.3[环境科学与工程—环境科学]