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  本文關鍵詞： 微量元素 砷 汞 含量 賦存狀態(tài) 東林礦　出處：《安徽理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：為研究重慶東林礦4#和6#主采煤層煤中砷、汞的含量水平和賦存狀態(tài),給東林礦煤炭資源合理利用提供科學依據(jù),共收集29個煤和巖石樣品(煤樣25個,巖石樣品4個),分別對該礦煤中砷、汞含量的一般特征、質量分數(shù)水平、富集情況和賦存狀態(tài)進行了研究,并結合研究區(qū)含煤地層的沉積環(huán)境,探討了煤中砷、汞的主要來源。 運用電感耦合等離子質譜儀(ICP-MS)和汞分析儀(AMA254)分別測定了煤樣中砷和汞的含量,結果表明：東林礦煤中砷含量的變化范圍0.19-7.87μg/g,平均1.85pg/g；汞含量的變化范圍0.11-3.3μg/g,平均0.54μg/g。與世界煤中砷、汞的背景值(豐度)相比,東林礦煤中砷為低質量分數(shù)水平,而汞為正常質量分數(shù)水平。相對地殼的富集系數(shù)可以看出：砷和汞均為富集狀態(tài)。與長河碥礦、松藻、西南三省一市(貴州、四川、云南和重慶)、中國煤、美國煤、澳大利亞煤和世界煤相比,東林礦煤中砷的含量偏低,而汞的含量高于其他地區(qū)煤(除松藻、重慶和四川外)。另外,就不同煤層而言,東林礦4#煤中砷的含量(1.88μg/g)略高于6#煤中砷的含量(1.79μg/g)；4#煤中汞的含量(0.64μg/g)高于6#煤中汞的含量(0.32μg/g)。砷和汞在4#煤層的頂板、煤層中上部、中部、中下部有所富集,其中砷在煤層中上部含量最高,而汞在中下部含量最高；砷和汞在6#層的頂、底板、煤層中下部富集。 通過煤中砷、汞含量與灰分、全硫、形態(tài)硫及灰分產率之間的相關分析、因子分析和聚類分析,結合其地球化學性質和前人研究成果,基于含煤地層沉積環(huán)境和煤中同生黃鐵礦的成因,探討了東林礦煤中砷、汞的賦存狀態(tài),結果表明：東林礦煤中砷和汞最可能賦存在硫酸鹽礦物和同生黃鐵礦中。
[Abstract]:In order to study the level and state of arsenic and mercury in coal seam of Donglin Mine, Chongqing, 29 samples of coal and rock (25 samples of coal) were collected, in order to provide scientific basis for rational utilization of coal resources in Donglin Coal Mine. The general characteristics, mass fraction, enrichment and occurrence of arsenic and mercury in coal were studied in four rock samples. The main sources of arsenic and mercury in coal were discussed in combination with the sedimentary environment of coal-bearing strata in the study area. Inductively coupled plasma mass spectrometer (ICP-MS) and mercury analyzer (AMA254) were used to determine the arsenic and mercury content in coal samples. The results showed that the variation range of arsenic content in Donglin coal was 0.19-7.87 渭 g / g, with an average of 1.85 PG / g; the variation range of mercury content was 0.11-3.3 渭 g / g, with an average of 0.54 渭 g / g. Compared with the background value (abundance) of mercury, arsenic in Donglin mine coal is low mass fraction level and mercury is normal mass fraction level. The relative crustal enrichment coefficient shows that arsenic and mercury are both enriched state. Three provinces and one city in southwest China (Guizhou, Sichuan, Yunnan and Chongqing), Chinese coal, American coal, Australian coal and world coal have lower arsenic content and higher mercury content than other coal (except pine algae). In addition, the arsenic content of coal in Donglin Coal Mine is 1.88 渭 g / g) slightly higher than that in No. 6 # coal (1.79 渭 g 路g / g), which is 0.64 渭 g / g / g higher than that in No. 6 # coal, and 0.32 渭 g / g / g. Arsenic and mercury are in the roof of the coal seam, in the upper and middle of coal seam, in the middle, in the middle, in the middle, in the middle, in the top of the coal seam, in the top of the coal seam, in the top of the coal seam, in the middle of the coal seam, and in the middle of the coal seam. The content of arsenic and mercury is the highest in the upper part of coal seam and the highest in the middle and lower part of coal bed, and the concentration of arsenic and mercury is in the top, bottom plate and middle and lower part of coal seam. Based on the correlation analysis, factor analysis and cluster analysis between arsenic, mercury and ash, total sulfur, speciation sulfur and ash yield in coal, the geochemical properties and previous research results were analyzed. Based on the sedimentary environment of coal bearing strata and the genesis of syngenic pyrite in coal, the occurrence state of arsenic and mercury in Donglin coal is discussed. The results show that arsenic and mercury in Donglin coal are most likely to occur in sulfate minerals and syngenic pyrite.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.11

【參考文獻】

相關期刊論文 前10條

1 盧新衛(wèi),雒昆利,王麗珍,王五一;陜西渭北聚煤區(qū)原煤的微量元素組成特征[J];吉林大學學報(地球科學版);2003年02期

2 劉桂建,楊萍s，

本文編號：1530385