吉林白山地区原煤微量元素地球化学特征

Geochemical behavior of trace elements in coals in Baishan area, Jilin Province

对吉林白山地区煤矿主采煤层中的As、B、Ba、Cd、Cu、Hg、Pb、Se、Sr等微量元素进行了分析 ,结果表明 :太原组与山西组由于成煤环境不同 ,微量元素组成及其质量分数存在一定的差异 ,太原组原煤中As、B、Hg、Pb、Se、Zn的质量分数明显高于山西组 ,山西组原煤中Ba、Cr、Cu、Mn、V的质量分数明显高于太原组。白山地区原煤中As、B、Hg、Pb、Se的质量分数明显高于地壳元素平均值 ,呈富集状态 ;Co、Cd与地壳平均值接近 ,其他元素均亏损。与全国煤中微量元素的质量分数平均值相比 ,As、Ba、Co、Cr、Cu、Hg、Ni、Pb、Se、V、Zn的质量分数高于全国平均值。B、Mn、Sr质量分数低于全国平均值。微量元素赋存状态及相关分析表明 ,Fe与亲硫有害元素As、Cu、Hg、Pb、Se具有显著相关关系 ,说明煤中黄铁矿及其他硫化物是许多有害微量元素的重要载体。

Concentration of elements including As, B, Ba, Cd, Cu, Hg, Pb, Se, Sr and other trace elements in channel samples have been determined, which collected in main active mines in Baishan, Jilin Province. The results indicated that characteristics and trace elements of coal in Taiyuan Group and Shanxi Group are different due to different coal-forming environment. The content of As, Hg, Pb, Se and Zn are obvious larger in Taiyuan Group than in Shanxi Group, but the concentration of Ba, Cr, Cu, Mn and V are lower in Taiyuan Group. Analysis results show that the concentration of As, B, Hg, Pb and Se of Baishan coals are markedly higher than average values of the earth crust, Co and Cd concentration of coals are approached the earth crust average value, and other of trace elements in Baishan coals are sparsity. Statistical results show that the elements As, Cu, Hg, Pb and Se are correlated with Fe, which indicates As, Cu, Hg, Pb and Se may possibly be existed in pyrite in coals.