Potentially hazardous elements in coal: Modes of occurrence and summary of concentration data for coal components
Potentially hazardous elements in coal: Modes of occurrence and summary of concentration data for coal components
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DOI：
10.1080/07349349808945578
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发表时间：
1998-07
期刊：
影响因子：
--
通讯作者：
A. Kolker;R. Finkelman
中科院分区：
文献类型：
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作者：
A. Kolker;R. Finkelman
总结了煤中13种潜在有害元素(Be、Cr、Mn、Co、Ni、As、Se、Cd、Sb、Hg、Pb、Th、U)的赋存状态数据。与以前的总结相比，最近的工作提炼了镍、铬和砷的赋存状态数据。对于铬来说，主要的赋存状态包括粘土矿物伊利石、无定形CrO(OH)相和含铬尖晶石。镍以硫化物(黄铁矿和铁铁矿)的形式存在，也以有机结合的形式存在。含砷黄铁矿可能是烟煤中砷的主要寄主。主要通过定量微量分析技术获得的13种HAP的浓度数据是针对煤炭的矿物和有机部分进行汇编的。HAPS元素在铁硫化物中含量最高，最大值分别为2300ppm(Co)、4500ppm(Ni)、4.9wt.%(As)、2000ppm(Se)、171ppm(Hg)和5500ppm(Pb)。痕量元素微量分析是对整体分析方法的重大改进，它表明，对于给定的煤，在细微尺度上存在相当大的痕量元素变化，而对于不同类型的煤，痕量元素的含量也不同。
Mode-of-occurrence data are summarized for 13 potentially hazardous elements (Be, Cr, Mn, Co, Ni, As, Se, Cd, Sb, Hg, Pb, Th, U) in coal. Recent work has refined mode-of-occurrence data for Ni, Cr, and As, as compared to previous summaries. For Cr, dominant modes of occurrence include the clay mineral iliite, an amorphous CrO(OH) phase, and Cr-bearing spinels. Nickel is present in Fe-sulfides (pyrite and marcasite) and is also organically bound. Arsenic-bearing pyrite may be the dominant host of As in bituminous coals. Concentration data for the 13 HAPs, obtained primarily by quantitative microanalysis techniques, are compiled for mineral and organic portions of coal. HAPs element concentrations are greatest in Fe-sulfides, and include maxima of 2,300 ppm (Co), 4,500ppm (Ni), 4.9wt.% (As), 2,000ppm (Se), 171 ppm (Hg), and 5,500ppm (Pb). Trace-element microanalysis is a significant refinement over bulk methods, and shows that there is considerable trace-element variation on a fine scale for a given coal, a...