【摘要】：為探明云南臨滄幫買盆地及其周邊煤中微量元素的含量水平及環(huán)境效應(yīng),共采集了 23個(gè)樣品,其中包括勐托8個(gè)煤樣、3個(gè)煤夾矸樣,大寨6個(gè)煤樣、6個(gè)煤渣樣,分別對(duì)大寨和勐托煤中微量元素含量水平及富集情況進(jìn)行討論,并探討了勐托煤與煤夾矸中和大寨煤與煤渣中的微量元素差異對(duì)比。將勐托區(qū)、大寨區(qū)煤樣中微量元素含量與中國(guó)煤、世界煤中相應(yīng)元素含量進(jìn)行對(duì)比,勐托與大寨煤中微量元素有著不同程度的富集,并且富集元素種類略有不同。勐托和大寨煤樣中包括稀土元素在內(nèi)的元素含量及部分元素相關(guān)性參數(shù)說(shuō)明了物源環(huán)境與熱液活動(dòng)分別對(duì)煤中微量元素產(chǎn)生了影響,熱液活動(dòng)造成勐托與大寨煤中稀土元素分布模式顯著差異,Ge、Be、As、W在大寨煤中的富集是由熱液攜帶基底二云母花崗巖微量元素影響所致;U、Pb、Bi、Th在幫買盆地的富集與熱液無(wú)關(guān),可能與酸性花崗巖的物源供給有關(guān)。通過(guò)探討煤中微量元素在大寨煤與煤渣的含量差異,得出結(jié)論:煤中稀土元素經(jīng)燃燒并不改變分布模式,只是含量上略有差距;大寨煤渣各個(gè)樣品微量元素的總含量上差別大,但比大寨煤中微量元素的波動(dòng)范圍稍小;除Ge、T1外,其余微量元素在煤渣中均有不同程度的富集。對(duì)照勐托地區(qū)煤與煤夾矸中微量元素,我們應(yīng)該著重注意夾矸中含量較高的有害元素,以防污染的擴(kuò)散。
[Abstract]:In order to find out the content level and environmental effect of trace elements in coal in and around Lincang Basin, Yunnan Province, 23 samples were collected, including 8 samples from Mengto, 3 samples from gangue, 6 samples from Dazhai and 6 samples from cinder. The content and enrichment of trace elements in Dazhai and Mengto coals were discussed, and the differences of trace elements between Mengto coal and coal gangue and in Dazhai coal and cinder were discussed. Comparing the trace element content in the coal samples of Mengto and Dazhai with that of the Chinese coal and the coal of the world, the trace elements in Mengto and Dazhai coals are enriched to different degrees, and the types of the enriched elements are slightly different. The contents of elements including rare earth elements in the samples of Mengto and Dazhai coal and the correlation parameters of some elements indicated that the source environment and hydrothermal activity had different effects on trace elements in coal. The distribution pattern of rare earth elements in Mengto coal and Dazhai coal is significantly different due to hydrothermal activity, and the enrichment of Ge,Be,As,W in Dazhai coal is caused by the influence of microelements in the basement dimica granite carried by hydrothermal solution. The enrichment of PbPbTh in the Bangmai basin is not related to hydrothermal solution, but may be related to the provenance of acid granite. By discussing the difference of trace elements in Dazhai coal and cinder, it is concluded that the distribution pattern of rare earth elements in coal is not changed by combustion, but there is a slight difference in the content of rare earth elements in coal. The total content of trace elements in Dazhai coal slag varies greatly, but the fluctuation range of trace elements in Dazhai coal is smaller than that in Dazhai coal. Except for Ge,T1, the other trace elements are enriched in different degrees in the cinder. Compared with trace elements in coal and gangue in Mengto area, we should pay more attention to harmful elements in gangue in order to prevent the spread of pollution.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.11

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1 孫景信,R.E.Jervis;煤中微量元素及其在燃燒過(guò)程中的分布特征[J];中國(guó)科學(xué)(A輯 數(shù)學(xué) 物理學(xué) 天文學(xué) 技術(shù)科學(xué));1986年12期

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