复杂污染源下采煤沉陷区土壤重金属分布及行为特征  

Distribution and Behavior Characteristics of Heavy Metals in Soil from Coal Mining Subsidence Area with Complex Pollution Sources

作　　者：许可 杨森[1] 任梦溪 魏祥平[2] 董祥林[2] 郑刘根[1] XU Ke;YANG Sen;REN Meng-xi;WEI Xiang-ping;DONG Xiang-lin;ZHENG Liu-gen(School of Resource and Environmental Engineering,Anhui University,Anhui Province Engineering Laboratory for Mine Ecological Remediation,Hefei,Anhui 230601,China;Huaibei Mining(Group)Co.,Ltd.Anti-piping and Measuring Department,Huaibei,Anhui 235000,China)

机构地区：[1]安徽大学资源与环境工程学院,安徽省矿山生态修复工程实验室,安徽合肥230601 [2]淮北矿业(集团)有限责任公司通防地测部,安徽淮北235000

出　　处：《环境监测管理与技术》2021年第6期29-34,共6页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(42072201,41702176);淮北矿业集团有限责任公司科技基金资助项目(HK-2018-1)。

摘　　要：采用数理统计学、克里金插值等方法研究安徽淮北采煤沉陷区土壤中Cu、Zn、Cd、Cr、Ni、Pb、As和Hg等元素空间分布及其行为特征。结果表明:土壤中Zn平均值是农用地土壤污染风险筛选值的1.1倍,其他元素未超过筛选值。Cu富集在工业园区南部,Zn、As富集在两河交汇处、工业园区南部,Cd、Pb和Hg富集在沉陷区西部,Cr、Ni富集在沉陷区东部、西部;土壤剖面上Cu最大值出现在80 cm处,Ni最大值在40 cm处,其他元素最大值均在20 cm处。土壤中元素迁移程度为Cu最高,Zn、Cr、Hg和As最低;土壤中Cd活化率较高,达到27.1%,易被植物吸收富集。Mathematical statistics,Kriging interpolation and other methods were used to study the spatial distribution and behavior characteristics of element(Cu,Zn,Cd,Cr,Ni,Pb,As and Hg)in the soil from a coal mining subsidence area in Huaibei,Anhui.The results showed that the average content of Zn in soil was 1.1 times of its risk screening value for soil contamination of agricultural land,other elements did not exceed their risk screening values.Cu was concentrated in the south of the industrial park.Zn and As were enriched in the intersection of the two rivers and the south of the industrial park.Cd,Pb and Hg were concentrated in the west of the subsidence area.Cr and Ni were concentrated in the east and west of the subsidence area.On the soil profile,the maximum value of Cu appeared at a depth of 80 cm,the maximum value of Ni was at 40 cm,and the maximum values other elements were at 20 cm.The migration degree of Cu in the soil was the highest,and Zn,Cr,Hg and As were the lowest.The activation rate of Cd in soil was high,up to 27.1%,which was easy to be absorbed and enriched by plants.

关 键 词：重金属 土壤 分布 迁移 采煤沉陷区 淮北 

分 类 号：X131.3[环境科学与工程—环境科学] X752