淮南潘集采煤沉陷区土壤及煤矸石镉环境地球化学特征  

Environmental geochemical characteristics of cadmium of soil and coal gangue in mining-induced subsidence area of Panji mine in Huainan

作　　者：杨涛 陈欣悦 刘旭 郑刘根[1] YANG Tao;CHEN Xinyue;LIU Xu;ZHENG Liugen(Collaborative Innovation Center of Mine Environment Restoration and Wetland Ecological Security,School of Resources and Environmental Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学资源与环境工程学院矿山环境修复与湿地生态安全协同创新中心,安徽合肥230601

出　　处：《煤田地质与勘探》2018年第A01期1-5,共5页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41373108;41702176);安徽省交通航务工程有限公司科技开发项目(JTHW-2017K1)~~

摘　　要：以淮南潘集采煤沉陷区土壤、煤矸石为研究对象,采用电感耦合等离子体质谱(ICP-MS)测定样品中重金属镉(Cd)含量,探讨其空间分布特征;利用Tessier五步形态提取法,研究样品中Cd赋存形态,分析其生物可利用性;最后采用地累积指数法评价沉陷区土壤和煤矸石中Cd污染程度。结果表明:潘集采煤沉陷区土壤Cd含量是淮南土壤背景值4.17倍,煤矸石中Cd含量是淮南土壤背景值和煤背景值5.33倍;潘集采煤沉陷区土壤和煤矸石中残渣态Cd占绝大部分,可交换态Cd含量低,但潜在生物可利用态含量高;地累积指数法结果表明,淮南潘集采煤沉陷区土壤和煤矸石中Cd中度污染,应采取措施优先治理控制。Taking the soil and coal gangue of Panji coal mining–induced subsidence area in Huainan as the research object,the content of Cd in the samples was determined by inductively coupled plasma mass spectrometry(ICP-MS),and the spatial distribution characteristics of trace elements were explored;the heavy metals in the samples were studied by Tessier’s five-step morphology extraction method.The morphology of Cd and its bioavailability were analyzed.Finally,the method of geo-accumulation index was used to evaluate the degree of Cd pollution in soil and coal gangue in the subsidence area.The results showed that:the Cd content in the subsidence area of Panji coal mining area in Huainan was 4.17 times higher than the background value of the soil in Huainan,and the Cd content in coal gangue samples was 5.33 times higher than the background value of Huainan soil and coal background value;the residual Cd in coal gangue and soil accounted for the majority,the exchangeable Cd content was low,but the potential bioavailable state content was high;the results of the geo-accumulation index method indicate that the moderate Cd contamination in the soil and coal gangue in the subsidence area of Panji coal mining area in Huainan should be controlled by priority measures.

关 键 词：采煤沉陷区 土壤 煤矸石 镉(CD) 赋存状态 

分 类 号：P595[天文地球—地球化学]