Modes of Occurrence of Trace Elements in Coal Gangue from NO.1 Coal Mine of Pingdingshan Mine Area
XU Hongliang
GUO Hui
SONG Wenjuan
LU Hongxia
LIU Ziqin
ZHANG Zhenhong
ZHANG Guangjun
Abstract：Sequential chemical extraction procedure was used to investigate the modes of occurrence of 17 hazardous trace elements,such as Be,V,Cr,Co,Ni,Cu,Sr,Mo,Cd,Sb,Ba,Pb,Th,U,Hg,As and Se,in coal gangue from No.1 coal Mine of Pingdingshan mine area.ICP-MS and AFS were used to analyze the content of trace elements in coal gangue and sequential chemical extraction states.The results show that the hazardous trace elements in coal gangue mainly exist in the residual state,then in carbonate state,iron and manganese oxides state,organic matter and sulfide state,and the mass ratio existing in the exchangeable state is relatively low.For one mode of occurrence,the potential hazardous to environment of trace elements are different as their mass ratios in this mode of occurrence are different.Under the supergene geological conditions,V,Sr,Cd,Ba,Pb and Se are more hazardous to environment as their potential leaching rates exceed by 10％.
Keywords：coal ganguesequential chemical extractionhazardous trace elementsmodes of occurrencepotential leaching rate
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 65-69 )