平顶山矿区一矿煤矸石中微量元素赋存状态研究  

Modes of Occurrence of Trace Elements in Coal Gangue from NO.1 Coal Mine of Pingdingshan Mine Area

作　　者：许红亮[1] 郭辉[1,2] 宋文娟[1] 卢红霞[1] 刘自勤 张振宏[3] 张广军[3] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001 [2]武汉吾成科技有限公司,湖北武汉430071 [3]平煤股份一矿,河南平顶山467000

出　　处：《环境科学与技术》2016年第5期65-69,共5页Environmental Science & Technology

基　　金：国家自然科学基金项目(40872102)

摘　　要：采用逐级化学提取法研究平顶山矿区一矿煤矸石中Be、V、Cr、Co、Ni、Cu、Sr、Mo、Cd、Sb、Ba、Pb、Th、U、Hg、As、Se等17种有害微量元素的赋存状态,采用电感耦合等离子体质谱法(ICP-MS)和原子荧光光谱法(AFS)分析了煤矸石和各提取状态样品的微量元素含量。结果表明:煤矸石的有害微量元素均以残渣态为主,碳酸盐结合态、Fe-Mn氧化物结合态、有机物和硫化物结合态次之,可交换态的含量相对较少。各种微量元素在某一赋存状态下所占的质量比例相差较大,对环境的潜在危害性不同。V、Sr、Cd、Ba、Pb、Hg、Se的潜在可淋失率超过了10%,在表生地质条件下对环境具有较大的危害性。Sequential chemical extraction procedure was used to investigate the modes of occurrence of 17 hazardous trace elements, such as Be, V, Cr, Co, Ni, Cu, Sr, Mo, Cd, Sb, Ba, Pb, Th, U, Hg, As and Se, in coal gangue from No.1 coal Mine of Pingdingshan mine area. ICP-MS and AFS were used to analyze the content of trace elements in coal gangue and sequential chemical extraction states. The results show that the hazardous trace elements in coal gangue mainly exist in the residual state, then in carbonate state, iron and manganese oxides state, organic matter and sulfide state, and the mass ratio existing in the exchangeable state is relatively low. For one mode of occurrence, the potential hazardous to environment of trace elements are different as their mass ratios in this mode of occurrence are different. Under the supergene geological conditions, V, Sr, Cd, Ba, Pb and Se are more hazardous to environment as their potential leaching rates exceed by 10 %.

关 键 词：煤矸石 逐级化学提取 有害微量元素 赋存状态 潜在可淋失率 

分 类 号：X752[环境科学与工程—环境工程]