煤中潜在毒害元素分布的多元分析及其地球化学意义

在对贵州省二叠纪龙潭组煤 Ｓ、Ｆｅ、Ａｓ、Ｃｄ、Ｈｇ、Ｐｂ、Ｓｅ、Ｓｂ、Ｔｌ、Ｚｎ分布规律进行讨论的基础上，作者运用多元分析方法这些潜在毒害元素的相关关系，并结合元素地球化学知识给出了这些元素在煤中赋存状态的信息。煤怪中Ａｓ、Ｈｇ、Ｓｂ主要赋存地交内铁矿中：Ｚｎ、Ｓｅ主要赋存于闪锌：Ｐｂ以方 铅矿形式存在于煤中，从元素地球化学性质上讲Ｃｄ应赋存地闪锌矿中，但由于其在煤中的含量较低，造成分析数据的误

MULTIVARIABLE ANALYSIS ON THE DISTRIBUTION OF POTENTIALLY HAZARDOUS ELEMENTS IN COAL AND ITS GEOCHEMICAL SIGNIFICANCE

After the study of the distribution law of S, Fe, As, Cd, Hg, Pb, Se,Sb, Tl and Zn in coal seams of the Longtan Group of the Permian Period in Guizhou Province, multivariable analysis was used in the study of correlations among these elements in the coal seams. From the correlations among these elements and the elemental geochemistry of these elements, we got some useful information about the possible modes of occurrence of these elements in coal seams of the Longtan Group in Guizhou. 1) Arsenic, Hg and Sb may exist in late stage pyrite in coal; 2) Zn and Se in sphalerite; 3) Pb in galena; 4) according to the elemental geochemistry of Cd, it may exist in sphalerite, however, Cd contents in coal are too low to get exact analytical results, and the correlation between Zn and Cd was erased; 5) the modes of occurrence or Tl in coal are very complex. When this method is applied to the study of the modes of occurrence of trace elements in coal, on the one hand, a set of representative samples should be gotten, and on the other hand the accurately analytical results of the trace elements in coal should also be acquired.