| 煤中砷,铅,铍,铬等元素的存在状态 |
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| 引用本文： | 张振桴,杨幼村.煤中砷,铅,铍,铬等元素的存在状态[J].燃料化学学报,1992,20(2):206-212. |
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| 作者姓名： | 张振桴 杨幼村 |
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| 作者单位： | 中国科学院山西煤炭化学研究所，中国科学院山西煤炭化学研究所，中国科学院山西煤炭化学研究所，中国科学院山西煤炭化学研究所，中国科学院山西煤炭化学研究所，中国科学院山西煤炭化学研究所 太原 030001，太原 030001，太原 030001，太原 030001，太原 030001，太原 030001 |
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| 摘 要： | 煤是由有机物和无机物组成的混合物。无机物按其在煤中的浓度大小可分为三类:(1)常量元素,在煤中浓度大于0.5%,如Si,Al,Fe,Ca等。(2)次要元素,约占煤的0.02%—.5%,包括K,Mg,Na,Ti,有时还有P,Ba等。(3)微量元素,在煤中浓度<0.02%,这类元素目前已测出60种左右。60年代以来,基于能源需求的增加,国内外煤炭消耗量都很大,考虑到有害的微量元素对环境的污染,国外进行了大量的煤
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| 关 键 词： | 铅 砷 煤 微量元素 酸抽提 |
MODE OF OCCURRENCE OF Pb,As,Be,Cr IN COAL |
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| Zhang Zhenfu Fan Jinchuan Jin Jufang Yang Youcun Song Lijun Yang Huang.MODE OF OCCURRENCE OF Pb,As,Be,Cr IN COAL[J].Journal of Fuel Chemistry and Technology,1992,20(2):206-212. |
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| Authors: | Zhang Zhenfu Fan Jinchuan Jin Jufang Yang Youcun Song Lijun Yang Huang |
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| Abstract: | The contents of Pb, As, Be, Cr in seventeen coals of different rank were determined.According to the results, they have little relationship to the degree of coalification and sulfur content. Mode of occurrence of these trace elements was studied by washability test and acid extraction. The results show that arsenic is inorganically associated in the form of such as arsenic sulfide and arsenopyrite. Pb is inorganically associated in major part and Cr is in minor part, Be is found to be more strongly associated with organic matter. The washability order of these elements are As>Pb>Cr>Be. In fact, Be has no washability at all. |
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| Keywords: | trace elements mode of occurrence acid extract |
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