淮南煤田石炭-二叠系煤中有害元素分布与富集赋存特征
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摘要
为调查分析淮南煤田石炭—二叠系有害元素的分布与富集赋存特征,采用ICP-MS对张集矿、潘三矿和顾桥矿共159件样品的煤中微量元素含量进行了测试分析,分析了11种有害元素的含量分布特征、富集特征,利用聚类图谱探讨了有害元素的富集赋存特征。研究结果表明:除As外,绝大多数元素的平均含量均低于地壳丰度,除Ba和As外,绝大多数元素的平均含量均高于中国煤、美国煤和世界;采用地壳丰度作为对比值所得到的富集系数严重偏离了煤中有害元素的分布特征,与中国煤、美国煤和世界煤相对比较,Cd高度富集,Cr、Cu、Ni、Pb、Sn、Ti为轻度富集至富集;不同煤层有害元素的富集程度存在较大的差异,Cd、Cr、Pb、Ni、Sn易出现富集,Cd为典型富集的有害元素,在8煤、7煤、6煤、5煤和4中出现高度富集;不同矿井主采煤层中有害元素富集程度存在差异,明显高度富集的有害元素为Cd、Ti;原煤灰分中的酸性组分超过灰成分的80%,灰成分指数平均碱酸比为9. 64%,煤中有害元素主要为陆源碎屑来源,部分存在自生矿物; As、Ni赋存富集于黄铁矿中,Ba、Mn可能赋存富集于碳酸盐矿物中,Cr可能吸附富集于粘土矿物中、Pb、Sn、Ti可能与硫酸盐矿物有关,Zn、Cu可能赋存在闪锌矿中,Cd可能赋存富集于黄铁矿和吸附富集于粘土矿物中,其富集程度与沉积环境和煤层稳定程度有关。
In order to investigate the characteristics of distribution,enrichment and occurrence of the harmful elements from Carboniferous-permian coal in Huainan coalfield,159 coal samples were collected from Zhangji coal mine,Pansan coal mine and Guqiao coal mine,and trace elements were tested by ICP-MS,the concentration distribution characteristics,the enrichment characteristics of 11 types of the harmful elements was analyzed,the occurrence characteristics of the harmful elements was discussed by clustering map.The results show that the average content from most of the harmful elements is lower than the continental crust abundance except As,the average content from most of the harmful element is higher the average value of them in Chinese coal,American coal and the international coal except Ba and As. The enrichment coefficients calculated by the continental crust abundance seriously deviate from the concentration distribution characteristics of the harmful elements in coal from the studied area. Comparison with Chinese coal,American coal,and the international coal,Cd has highly enriched,Cr,Cu,Ni,Pb,Sn,Ti occur slight enrichment to enrichment. The enrichment level of the harmful element in the different coal seams is different,Cd,Cr,Pb,Ni,Sn are easily enriched. Cd as a typically harmful enrichment element has highly enriched in coal No.8,No.7,No.6,and No.5. There is difference in the enrichment level of the harmful elements in the main mining coal seam from the different coal mines,the obvious highly enriched harmful elements are Cd,Ti.The acidic content in the ash content of the raw coal is beyond 80%,the ratio between alkali and acid in the index of ask component is9. 64%,the harmful elements in coal mainly derive from terrigenous clastic deposits,and the partial harmful elements form the authigenic minerals. As and Ni occur and enrich in the pyrite,Ba and Mn may occur and enrich in the carbonate minerals,Cr may be adsorbed and enrich in the clay minerals,the occurrence and enrichment of Pb,Sn and Ti may be related with the sulfate minerals,Zn and Cu may occur in the sphalerite. Cd may occur and enrich in the pyrite or may be adsorbed and enrich in the clay minerals.
In order to investigate the characteristics of distribution,enrichment and occurrence of the harmful elements from Carboniferous-permian coal in Huainan coalfield,159 coal samples were collected from Zhangji coal mine,Pansan coal mine and Guqiao coal mine,and trace elements were tested by ICP-MS,the concentration distribution characteristics,the enrichment characteristics of 11 types of the harmful elements was analyzed,the occurrence characteristics of the harmful elements was discussed by clustering map.The results show that the average content from most of the harmful elements is lower than the continental crust abundance except As,the average content from most of the harmful element is higher the average value of them in Chinese coal,American coal and the international coal except Ba and As. The enrichment coefficients calculated by the continental crust abundance seriously deviate from the concentration distribution characteristics of the harmful elements in coal from the studied area. Comparison with Chinese coal,American coal,and the international coal,Cd has highly enriched,Cr,Cu,Ni,Pb,Sn,Ti occur slight enrichment to enrichment. The enrichment level of the harmful element in the different coal seams is different,Cd,Cr,Pb,Ni,Sn are easily enriched. Cd as a typically harmful enrichment element has highly enriched in coal No.8,No.7,No.6,and No.5. There is difference in the enrichment level of the harmful elements in the main mining coal seam from the different coal mines,the obvious highly enriched harmful elements are Cd,Ti.The acidic content in the ash content of the raw coal is beyond 80%,the ratio between alkali and acid in the index of ask component is9. 64%,the harmful elements in coal mainly derive from terrigenous clastic deposits,and the partial harmful elements form the authigenic minerals. As and Ni occur and enrich in the pyrite,Ba and Mn may occur and enrich in the carbonate minerals,Cr may be adsorbed and enrich in the clay minerals,the occurrence and enrichment of Pb,Sn and Ti may be related with the sulfate minerals,Zn and Cu may occur in the sphalerite. Cd may occur and enrich in the pyrite or may be adsorbed and enrich in the clay minerals.
引文
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[20]蓝昌益,杨本才,彭苏萍.淮南煤田二叠纪含煤岩系主要煤层的成煤环境[J].煤炭学报,1988,13(l):11-22.
[21]Gluskoter H J,Ruch R R,Miller W G,et al.Trace elements in coal:Occurrence and distribution[A].Illinois State Geological Survey,1977,49-154.
[22]Filippidis A,Geograkopoulos A,Kassoli-Fournaraki A,et al.Trace element contents in composited samples of three lignite seams from the central Part of the Drama lignite deposit,Macedonia,Greece[J].International Journal of Coal Geology,1996(9):219-234.
[23]Valkovic V.Trace elements in coal[M].Boca Raton:CRC Press,1983:558.
[24]Dai S F,Luo Y B,Seredin V V,et al.Revisiting the late Permian coal from the Huayingshan,Sichuan,southwestern China:Enrichment and occurrence modes of minerals and trace elements[J].International Journal of Coal Geology,2014,122:110-128.
[25]黎彤.化学元素的地球丰度[J].地球化学,1976,3:167-174.
[26]唐修义煤中微量元素及其研究意义[J].中国煤田地质,2002,14(增刊):1-4.
[27]任德贻,赵峰华,代世峰,等.煤的微量元素地球化学[M].北京:科学出版社,2006,99-225.
[28]Dai S F,Zhou Y P,Ren D Y,et al.Geochemistry and mineralogy of the Late Permian coals from the Songzao Coalfield,Chongqing,Southwestern China[J].Science in China Series D:Earth Sciences,2007,50(5):678-688.
[29]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,2012,9:3-21.
[30]Ketris M P,Yudovich Y E.Estimations of Clarkes for carbonaceous biolithes:World average for trace element contents in black shales and coals[J].International Journal of Coal Geology,2009,78:135-148.
[2]James D W,Krishnamoorthy G,Benson S A,et al.Modeling trace element partitioning during coal combustion[J].Fuel Processing Technology,2014,126:284-297.
[3]Zhou C,Liu G,Xu Z,et al.The retention mechanism,transformation behavior and environmental implication of trace element during co-combustion coal gangue with soybean stalk[J].Fuel,2017,189:32-38.
[4]Dai S F,Finkelman R B.Coal as a promising source of critical elements:Progress and future prospects[J].International Journal of Coal Geology,2018,186:155-164.
[5]魏晓飞,张国平,李玲,等.黔西南煤燃烧产物微量元素分布特征及富集规律研究[J].环境科学,2012,33(5):1457-1462.
[6]张建强,张恒利,杜金龙,等.内蒙古白音华煤田煤中微量元素分布特征[J].煤炭学报,2016,41(2):310-315.
[7]刘桂建,彭子成,王桂梁,等.煤中微量元素研究进展[J].地球科学进展,2002,17(1):53-62.
[8]Li C H,Liang H D,Wang S K,et al.Study of harmful trace elements and rare earth elements in the Permian tectonically deformed coals from Lugou Mine,North China Coal Basin,China[J].Journal of Geochemical Exploration,2018,190:10-25.
[9]刘贝,黄文辉,敖卫华,等.沁水盆地晚古生代煤中硫的地球化学特征及其对有害微量元素富集的影响[J].地学前缘,2016,23(3):59-67.
[10]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(增刊):17-21.
[11]宋党育,张晓逵,张军营,等.煤中有害微量元素的洗选迁特性[J].煤炭学报,2010,35(7):1170-1176.
[12]赵志根,唐修义,李宝芳.淮南矿区煤的稀土元素地球化学[J].沉积学报,2000,18(3):453-459.
[13]刘文中,陈萍,陈健,等.淮南煤及其燃烧产物中稀土元素丰度的比较[J].煤炭学报,2009,34(6):814-818.
[14]李晖,郑刘根,刘桂建.淮南张集矿区煤中微量元素的含量分布特征分析[J].岩石矿物学杂志,2011,30(4):696-700.
[15]陈健,陈萍,刘文中.淮南矿区煤中12种微量元素有赋存状态及环境效应[J].煤田地质与勘探,2007,37(6):47-52.
[16]黄文辉,杨起,彭苏萍,等.淮南二叠纪煤及其燃烧产物地球化学特征[J].地球科学-中国地质大学学报,2001,26(5):501-507.
[17]刘会虎,兰天贺,胡宝林,等.淮南潘集外围深部煤层气地球化学特征及成因[J].煤炭学报,2018,43(2):498-506.
[18]刘会虎,胡宝林,徐宏杰,等.淮南潘谢矿区二叠系泥页岩构造热演化特征[J].天然气地球科学,2015,26(9):1696-1704.
[19]徐宏杰,胡宝林,郑建斌,等.淮南煤田煤系页岩气储集空间特征,及其岩相控制作用[J].吉林大学学报(地球科学版),2017,47(2):418-430.
[20]蓝昌益,杨本才,彭苏萍.淮南煤田二叠纪含煤岩系主要煤层的成煤环境[J].煤炭学报,1988,13(l):11-22.
[21]Gluskoter H J,Ruch R R,Miller W G,et al.Trace elements in coal:Occurrence and distribution[A].Illinois State Geological Survey,1977,49-154.
[22]Filippidis A,Geograkopoulos A,Kassoli-Fournaraki A,et al.Trace element contents in composited samples of three lignite seams from the central Part of the Drama lignite deposit,Macedonia,Greece[J].International Journal of Coal Geology,1996(9):219-234.
[23]Valkovic V.Trace elements in coal[M].Boca Raton:CRC Press,1983:558.
[24]Dai S F,Luo Y B,Seredin V V,et al.Revisiting the late Permian coal from the Huayingshan,Sichuan,southwestern China:Enrichment and occurrence modes of minerals and trace elements[J].International Journal of Coal Geology,2014,122:110-128.
[25]黎彤.化学元素的地球丰度[J].地球化学,1976,3:167-174.
[26]唐修义煤中微量元素及其研究意义[J].中国煤田地质,2002,14(增刊):1-4.
[27]任德贻,赵峰华,代世峰,等.煤的微量元素地球化学[M].北京:科学出版社,2006,99-225.
[28]Dai S F,Zhou Y P,Ren D Y,et al.Geochemistry and mineralogy of the Late Permian coals from the Songzao Coalfield,Chongqing,Southwestern China[J].Science in China Series D:Earth Sciences,2007,50(5):678-688.
[29]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,2012,9:3-21.
[30]Ketris M P,Yudovich Y E.Estimations of Clarkes for carbonaceous biolithes:World average for trace element contents in black shales and coals[J].International Journal of Coal Geology,2009,78:135-148.