淮南顾桥矿土壤环境中微量元素的分布及其生态风险评价  

Distribution and ecological risk assessment of trace elements in mining soil in Guqiao Coal Mine,Huainan Coalfield

作　　者：卢岚岚[1] 刘桂建[1] 王兴明[2] 王婕[1] 

机构地区：[1]中国科学技术大学地球与空间科学学院,安徽合肥230026 [2]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《中国科学技术大学学报》2014年第2期119-127,共9页JUSTC

基　　金：国家自然科学基金(41173032);国家科技支撑计划项目(1012BAC10B02);淮南矿业集团科技创新项目资助

摘　　要：有害微量元素在煤炭开采和加工利用过程中会释放、迁移并富集到周围土壤中.以安徽淮南顾桥矿为例,采集了矸石山附近不同距离的土壤表层样品及剖面样品,使用电感耦合等离子体-光学发射光谱(ICP-OES)测试了土壤中Zn,Pb,Cd,Ni,Cr,Cu的浓度,并探讨了它们的分布特征和生态风险.除采用地累积指数法及生态风险评价法外,将地累积指数法和内梅罗综合指数法结合,用以评价受污染地区多种微量元素综合污染情况.结果表明:土壤中Zn,Pb,Cd,Ni,Cr,Cu浓度随距矸石山距离增加而降低,随土壤深度变化趋势不显著;除Cd外,其余元素均未造成潜在污染.Environmental-sensitive trace elements would be released, migrate and be enriched in the surrounding soil environment during the process of coal mining and utilization. Soil samples from the surface and profiles were collected at different distances to the coal gangue pile of Guqiao Coal Mine and the concentrations of Zn, Pb, Cd, Ni, Cr and Cu were determined by inductively coupled plasma-optical emission spectrometry （ICP-OES）. The distribution and enrichment were accordingly investigated and the ecological risk was assessed as well. In addition to using geoaccumulation index and ecological risk index, geoaccumulation index and Nemerow index were combined in this area. Results show that concentrations of Zn, Pb, Cd, Ni, Cr and Cu in soils decrease with increasing distance, but change little with increasing depth. The soil is not contaminated by the trace elements except Cd.

关 键 词：微量元素 土壤 分布特征 生态风险评价 

分 类 号：X833[环境科学与工程—环境工程]