煤中痕量砷和汞的形态分析  

Speciation Analysis of Arsenic and Mercury in Coal

作　　者：刘晶[1] 陆晓华[2] 郭欣[3] 郑楚光[3] 

机构地区：[1]华中理工大学化学系 [2]华中理工大学环境科学与工程系 [3]华中理工大学煤燃烧国家重点实验室

出　　处：《华中理工大学学报》2000年第7期71-73,共3页Journal of Huazhong University of Science and Technology

基　　金：煤燃烧国家重点实验室开放课题资助项目

摘　　要：应用连续化学浸提法对煤进行四次浸提 ,根据不同形态砷、汞的溶解度 ,将煤中砷、汞分为可交换态、硫化物结合态、有机物结合态和残渣态 .砷在煤中主要以硫化物结合态存在 ,汞在煤中主要以硫化物结合态和残渣态存在 .不同煤种中砷、汞的各种形态的含量分布是不同的 .将煤按不同密度分级后 ,分别测定了各级煤粉中砷、汞含量 .砷、汞在密度较大的煤中含量较大 ,说明砷。Sequential chemical extraction procedure has been developed for partitioning of arsenic and mercury species in coal into four fractions. They were exchangeable As(Hg), bound organic As(Hg), bound sulfide As(Hg) and residue As(Hg). It was found that the main speciation of As was bound sulfide As and those of Hg were bound sulfide Hg and residue Hg. The coals were also classified into six parts of different specific gravity and the content of As and Hg were determined. The contents of As and Hg were large in the heavy density coal. It showed that As and Hg mainly existed in the mineral fraction of coal.

关 键 词：煤 砷 汞 形态分析 连续化学浸提法 燃烧 污染 

分 类 号：TQ533.1[化学工程—煤化学工程] TQ534.9