涡阳花沟西10号煤中微量元素的有机亲和性

Organic affinity of trace elements in coal from No.10 coal-bed at western Huagou,Guoyang

为研究淮北矿区涡阳花沟西勘查区10号煤中微量元素的有机亲和性,共采集10个勘探钻孔煤样品,采用电感耦合等离子质谱仪ICP-MS分析了12种微量元素的含量;应用LECO碳硫分析仪测定了煤的总有机碳TOC,并通过两者的相关关系分析了元素的有机亲和性,结合元素的地球化学特征和煤样XRD物相鉴定结果,通过聚类分析进一步推断元素的赋存状态。结果表明:V、Cr、Co、Ni、Mo、Cd、Sb、Pb和Zn元素含量低于全国均值,没有异常富集,Be、Cu和Tl略高于全国均值;Cd具有较强的有机亲和性,Co、Zn、Be和Cr的有机亲和性较弱,V、Ni、Cu、Mo、Sb、Pb和Tl不具有机亲和性;V、Sb、Cu、Cr、Pb、Co和Ni主要以铝硅酸盐吸附态赋存,Cd主要以有机结合态赋存。

In order to study the organic affinity of trace elements in coal from No. 10 coal-bed at western Huagou, Guoyang, 10 borehole samples were collected at exploration area of Huaibei mining area. The contents of 12 kinds of trace elements were determined by the inductively coupled plasma mass spectrometry （ICP-MS）, the total or- ganic carbon （TOC） of coal was determined by LECO carbon and sulfur analyzer, and the organic affinity of trace elements were deduced from the correlations between contents and TOCs. Then combined with the geochemical characteristics of trace elements anal results of X-ray diffraction, the occurrences of trace elements were further re- searched by cluster analysis. The results showed that the contents of V, Cr, Co, Ni, Mo, Cd, Sb, Pb and Zn were lower than the average of Chinese coal and weren＇t anomalously enriched, and Be, Cu and T1 were slightly higher. Cd had a strong organic affinity, organic affinity of Co, Zn, Be and Cr was weaker than that of Cd, but V, Ni, Cu, Mo, Sb, Pb and T1 did not have inorganic affinity. The occurrences of V, Sb, Cu, Cr, Pb, Co and Ni were aluminosilicate adsorption; and Cd was associated predominantly with organic matter.