准格尔煤田串草圪旦煤矿5号煤元素地球化学特征
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摘要
为研究准格尔串草圪旦5号煤微量元素地球化学特征,采用光学显微镜、扫面电子显微镜和X射线衍射(XRD)方法观测煤中矿物组成及形态特征,应用电感耦合等离子质谱(ICP-MS)方法测定煤中多种微量元素含量,运用数理统计方法研究微量元素在煤中的赋存特征。结果表明:5号煤中Li、Be、F、U、Hg 5种元素相对富集,含量高于研究区6号煤及中国煤中含量水平。5号煤中Li、F、Ga、Se无机亲和性强,Be、As、U为亲有机元素;Hg与硫含量显著正相关。各元素在煤中主要以有机结合态、无机结合态和硫化物结合态赋存。
In order to ascertain the geochemical features of trace elements in the No.5coal seam at Junger Coalfield's Chuancaogedan Coal mine,the mineral composition characteristics were observed through optical microscope,SEM and the X-ray Diffraction(XRD)method,the contents of trace elements in coal were determined by Inductively Coupled Plasma Mass Spectrometry(ICP-MS),and the occurrence of trace elements were then analyzed based on statistics.The results show that the contents of Li,Be,F,U,Hg in the No.5coal seam is higher than that in the No.6coal and Chinese coal.Li,F,Ga,Se are strong inorganic affinity elements,Be,As,U are organic affinity elements,and Hg is of significant positive correlation with sulfur content.Organic combination,inorganic compounds and sulfide bonded forms are the dominant occurrences of these trace elements in the No.5coal.
In order to ascertain the geochemical features of trace elements in the No.5coal seam at Junger Coalfield's Chuancaogedan Coal mine,the mineral composition characteristics were observed through optical microscope,SEM and the X-ray Diffraction(XRD)method,the contents of trace elements in coal were determined by Inductively Coupled Plasma Mass Spectrometry(ICP-MS),and the occurrence of trace elements were then analyzed based on statistics.The results show that the contents of Li,Be,F,U,Hg in the No.5coal seam is higher than that in the No.6coal and Chinese coal.Li,F,Ga,Se are strong inorganic affinity elements,Be,As,U are organic affinity elements,and Hg is of significant positive correlation with sulfur content.Organic combination,inorganic compounds and sulfide bonded forms are the dominant occurrences of these trace elements in the No.5coal.
引文
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[2]Dai S F,Ren D Y,Chou C L,et al.Geochemistry of trace elements in Chinese coals:A review of abundances,genetic types,impacts on human health,and industrial utilization[J].International Journal of Coal Geology,2012,94:3-21.
[3]Ren D Y,Zhao F H,Wang Y Q,et al.Distributions of minor and trace elements in Chinese coals[J].International Journal of Coal Geology,1999,40:109-118.
[4]Finkelman R B.Modes of occurrence of potentially hazardous elements in coals:Level of confidence[J].Fuel Processing Technology,1994,39:21-34.
[5]Kolker A.Minor element distribution in iron disulfides in coal:A geochemical review[J].International Journal of Coal Geology,2012,94:32-43.
[6]代世峰,任德贻,李生盛,等.内蒙古准格尔黑岱沟主采煤层的煤相演替特征[J].中国科学D辑:地球科学,2007,37:119-126.
[7]Dai S F,Ren D Y,Chou C L,et al.Mineralogy and geochemistry of the No.6coal(Pennsylvanian)in the Jungar Coalfield,Ordos Basin,China[J].International Journal of Coal Geology,2006,66:253-70.
[8]Luo K L,Ren D Y,Xu L R,et al.Fluorine content and distribution pattern in Chinese coals[J].International Journal of Coal Geology,2004,57:143-149.
[9]Dai S F,Ren D Y,Chou C L,et al.Mineralogy and geochemistry of boehmite-rich coals:New insights from the Haerwusu Surface Mine,Jungar Coalfield,Inner Mongolia,China[J].International Journal of Coal Geology,2008,74:185-202.
[10]唐书恒,马彩霞.中国煤炭资源洁净潜势评价指标探讨[J].河北建筑科技学院学报,2005,22(3):104-106.
[11]鲁百合.我国煤层中氟和氯的赋存特征[J].煤田地质与勘探,1996,24(1):9-12.
[12]王运泉,任德贻,王隆国.煤中微量元素的赋存状态[J].煤田地质与勘探,1996,24(2):9-13.
[13]王文峰,秦勇,宋党育.煤中有害微量元素的赋存状态[J].中国煤田地质,2003,15(4):10-14.
[14]王文峰,秦勇,刘新花,等.内蒙古准格尔煤田煤中镓的分布赋存与富集成因[J].中国科学D辑:地球科学,2011(2):181-196.
[15]陈萍,唐修义.中国煤中的氟[J].中国煤田地质,2002,14(增刊):25-28.
[16]Wang W F,Qin Y,LIU X H,et al.Distribution,occurrence and enrichment causes of gallium in coals from the Jungar Coalfield,Inner Mongolia[J].Science in China:Earth Sciences,2011,41(2):181-196.
[17]Kolker A.Minor element distribution in iron disulfides in coal:A geochemical review[J].International Journal of Coal Geology,2012,94:32-43.
[18]刘东娜,赵峰华,周安朝,等.大同煤田七峰山矿2号煤层若干微量元素地球化学特征[J].煤炭学报,2013,38(4):637-643.
[19]Eskenazy G M,Valceva S P.Geochemistry of beryllium in the Mariza-east lignite deposit(Bulgaria)[J].InternationalJournal of Coal Geology,2003,55(1):47-58.
[20]Seredin V V,Finkelman R B.Metalliferous coals:A review of the main genetic and geochemical types[J].International Journal of Coal Geology,2008,76:253-289.
[21]白向飞,李文华,陈文敏.中国煤中铍的分布赋存特征研究[J].燃料化学学报,2004,32(2):155-159.
[22]陈萍,唐修义.中国煤中的砷[J].中国煤田地质,2002,14(增刊):18-24.
[23]Song D Y,Qin Y,Zhang J Y,et al.Concentration and distribution of trace elements in some coals from Northern China[J].International Journal of Coal Geology,2007,67:179-191.
[24]黄文辉,唐修义.中国煤中的铀、钍和放射性核素[J].中国煤田地质,2002,14(增刊):55-63.
[25]任德贻,赵峰华,张军营,等.煤中有害微量元素富集的成因类型初探[J].地学前缘,1999,6:17-22.
[26]郑刘根,刘桂建,齐翠翠,等.中国煤中汞的环境地球化学研究[J].中国科学技术大学学报,2007,37(8):953-963.