贵州省煤中有害微量元素的地球化学特性

对贵州省主要产煤区特别是西南部高污染无烟煤进行了系统采样,应用电感耦合等离子体原子吸收光谱(ICP-AES)、原子荧光光谱(AFS)、离子选择性电极和化学方法测定了煤中As,Hg,F,Cl,Cr,Cd,Mo等有害微量元素和形态硫的含量特性,应用等离子体低温灰化仪分离出煤中的无机矿物质,测试结果表明,煤中As,Hg,F,Cr,Cd,Mo等元素的含量均显著高于我国煤中的平均值,含量异常高的煤主要分布在贵州省的西南部.微量元素与矿物质总量之间的相关性并不十分明显,Hg与As与黄铁矿之间显著相关.

GEOCHEMISTRY OF HAZARDOUS TRACE ELEMENTS IN COALS FROM GUIZHOU PROVINCE

The reserve of coal in Guizhou province is the highest among southern Chinese provinces.The characteristics of coal resource are high ash yield,high sulfur,and high pollution.The concentrations of seven potential hazardous trace elements,including As,Hg,F,Cr,Cd,Cl,Mo,and total sulfur,sulfate sulfur,organic sulfur,pyritic sulfur in eleven coal samples collected from Guizhou province were determined by Inductively Coupled Plasma Atomic Emission Spectrometry(ICP-AES),Atomic Fluorescence Spectroscopy(AFS),Ion-selective Electrode,and chemical method.Compared with average concentration of trace elements in Chinese coal,the contents of As,Hg,F,Cl,Cr,Cd,and Mo are much higher in Guizhou province.These trace elements are not associated with the total mineral matter content.With few exception,As and Cd are correlated with pyritic sulfur.