Geochemical and mineralogical evaluations of coal,shale,and mine waste overburden from Makum coalfield of the Northeast India  

作　　者：Nilotpol Bhuyan Nazrul Islam Monikankana Saikia James CHower Binoy K.Saikia 

机构地区：[1]Coal and Energy Division,CSIR-North East Institute of Science and Technology,Jorhat,Assam 785006,India [2]Academy of Scientific and Innovative Research(AcSIR),Ghaziabad 201002,India [3]Center for Applied Energy Research,University of Kentucky,2540 Research Park Drive,Lexington,KY 40511,USA

出　　处：《International Journal of Coal Science & Technology》2023年第3期41-57,共17页国际煤炭科学技术学报（英文）

基　　金：MoES (Govt of India)for his financial assistance to our project (GPP364).

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 fewμm 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.

关 键 词：Coal geology Mine waste overburden(MOB) PETROLOGY Rare earth elements(REEs) Potentially hazardous elements(PHEs) 

分 类 号：P61[天文地球—矿床学]