QE431 : Environmental geochemistry of Coal seams in Razi Mine (Ramian Region, Golestan Province)
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2018
Authors:
Dina Ghorbani [Author], Afshin Qishlaqi[Supervisor]
Abstarct: Coal mining is one of the sources of heavy mextal inputs, rare earth elements and non-mextallic elements inside the environment that can lead to contamination of various parts of the environment. The present project is aimed at investigating the geochemistry and organic and inorganic petrography of Razi Mining Coal (Golestan Province). The environmental impacts of mining in this area were also assessed on the quality of the adjacent river sediments. According to organic petrography studies of coal macerals, all three maceral groups, namely high concentration vitrinite (including Telovitrinite, Collotelinite), Inertinite group (including Fusinite, Semifusinite, Macrinite and Funginite) and the Liptinite group (including Cutinite and Resinite) are presence in these coal. For inorganic petrography and baxsed on X-ray diffraction analysis, the presence of kaolinite, quartz, siderite, dolomite, calcite, and pyrite minerals has been proven in these samples. The enrichment coefficient of rare elements from Razi coal relative to the world coals are 17.1. Among the rare elements with potentially hazardous environments (As, Cr, Cu, Se, Ni, Pb, Zn), only arsenic has less than one enrichment factor than world coal and the other elements are high enriched. The mean value of ∑REE in Razi coal is 439.99 ppm, which is more than ∑REE in chondrite (25.2 ppm), world coals clark (68 ppm), China coals (138 ppm) and American coals (62 ppm).this enrichment is highlighted for Tb, Ho and Eu elements. The cluster analysis of the geochemical data of Razi coal shows a strong positive correlation between REE and As. U, Mg, P, Pb, Sc, K, Y, Se and its high negative correlation with Fe, Th, Cs, Ti and Mn. The results of river sedimentation study showed that sediment samples had the most enrichment factors for Zn, Pb, Se and Cu, and the least enrichment for Cr, Ni and As mextals. pH for the sediments samples are alkanity and their texture is clayey to sandy and the amount of organic matter is relatively high in them. baxsed on the accumulation was found that selenium, lead, zinc and copper in moderate to severe pollution and mextals arsenic, nickel and chromium are in a non-polluting.
Keywords:
#Geochemistry #Coal mining #Coal Ash #Pollution #Razi coal mine Link
Keeping place: Central Library of Shahrood University
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