Geochemical and mineralogical evaluations of coal,shale,and mine waste overburden from Makum coalfield of the Northeast India
Nilotpol Bhuyan1
Nazrul Islam2
Monikankana Saikia2
James C.Hower3
Binoy K.Saikia2
1.Coal and Energy Division,CSIR-North East Institute of Science and Technology,Jorhat,Assam 785006,India2.Coal and Energy Division,CSIR-North East Institute of Science and Technology,Jorhat,Assam 785006,India;Academy of Scientific and Innovative Research(AcSIR),Ghaziabad 201002,India3.Center for Applied Energy Research,University of Kentucky,2540 Research Park Drive,Lexington,KY 40511,USA
摘要：The Cenozoic-age Makum coal from northeastern India offers numerous research opportunities because of its diverse geochemical and geological characteristics.Due to its high sulfur content,the coal has been found to be less useful for industrial purposes.It can,however,serve as a hub for ongoing research on coal-based derivative products.The aim of this research work is to investigate the mineralogical and geochemical compositions of the coal,mine overburden(MOB)and shale samples taken from the Makum coal field and also on establishing a mutual relationship between them.To characterize the geochemical controlling factors of the Makum coal field,the study employs coal petrography,FTIR,mineralogical,and geochemical analysis.According to X-ray diffraction analysis,the major minerals like quartz,kaolinite,haematite,illite,pyrite,and calcite are present in coal and MOB.Pyrite is observed by SEM-EDS analysis as cubic-shaped particles that are smaller than a few μm in size.The presence of sulfide minerals represents a phase of pyrite mineralization.The petrography study was used to better understand the environment that existed during the formation of the plant material,which aids us in determining the quantity of detrital mineral sediment contained in the coal.According to the ICP-MS analysis,the samples indicate significant levels of rare earth elements including yttrium.The present study reveals higher concentrations of poten-tial hazardous elements in the coal samples,with V,Cr,Ni,Cu,and Zn content in coal being considerably enriched compared to world-average concentrations.The correlation analysis reveals that the potential hazardous elements like Co,Ni,As,and Cu are associated with pyrite as they have strong affinity towards pyrite.Thus,numerous minerals and rare earth elements(REEs)exist,opening up a fresh avenue for more research in the area.This study also assists researchers in understanding the significance of Makum coal and provides numerous ideas for coal characterization.
机标关键词：shalefromcoalfieldevaluationsgeochemicalindiamakummineralogical
论文发表日期：2023-06-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：17( 41-57 )
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