Release Characteristics of Dissolved Organic Matter in Coal Gangue Under Water-rock Interaction
HUANG Bin
YUAN Jin
YUAN Ke
LI Qiuyu
REN Xiaozheng
WANG Haoyu
Abstract：In order to explore the release law and composition characteristics of dissolved organic matter in coal gangue un-der the action of water and rock,this paper selects coal gangue from three mining areas in Shanxi Province as the research ob-ject.Through static leaching experiments,scanning electron microscopy(SEM),total organic carbon analyzer and fluores-cence spectrophotometer were used to analyze the three-dimensional fluorescence data of 21 leaching solution water samples by parallel factor analysis.The results showed that the contents of dissolved organic carbon(DOC)in coal gangue leachate of Wajinwan Mine,Guandi Mine and Sihe Mine were 13.88～41.79 mg/L,22.35～55.53 mg/L and 59.64～105.95 mg/L,respective-ly.In addition,with the increase of soaking time,the DOC content in the leaching solution increased first and then decreased and finally tended to be stable.There is a good linear correlation between DOC and UV254 in the leaching solution of coal gangue in Wajinwan Mine and Guandi Mine,which indicates that the leaching solution contains conjugated double bonds or low molecu-lar weight benzene ring aromatic compounds.The dissolved organic matter in Wajinwan Mine gangue is mainly composed of benzene series,tyrosine and humus,and Guandi Mine gangue contains tryptophan and tyrosine protein organic matter.
Keywords：coal gangueleaching testrelease characteristicdissolved organic matterthree-dimensional fluorescence
Publication Date：2024-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 75-80 )