Comparison of dissolution characteristics of organic matter in coal gangue of different geological time

Authors

SUN Yanfang, Department of Resource & Environmental Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Key Laboratory of Mine Geological Hazards Mechanism and Control, Xi'an 710054, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo 454000, China
ZHAO Li, Department of Resource & Environmental Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Key Laboratory of Mine Geological Hazards Mechanism and Control, Xi'an 710054, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo 454000, ChinaFollow
LUO Shaohe, Department of Resource & Environmental Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Key Laboratory of Mine Geological Hazards Mechanism and Control, Xi'an 710054, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo 454000, China
ZHANG Lei, Department of Resource & Environmental Engineering, Henan Polytechnic University, Jiaozuo 454000, China
SUN Chao, Department of Resource & Environmental Engineering, Henan Polytechnic University, Jiaozuo 454000, China
LI Bowen, Department of Resource & Environmental Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Abstract

Taken the unweathered coal gangues obtained from the Jurassic coalbed of Bulianta mine and the Car-boniferous-Permian coalbed of Baode mine located in Shendong mining area as the research subjects, the dissolution characteristics of organic matter in two kinds of coal gangues were studied comparatively through soaking experiments, and combined with three-dimensional fluorescence spectrometry and parallel factor analysis. It is significant for the underground reservoir to study mechanism of water treatment in coal mining areas. These results indicate that the total ion concentration in DOM sample of coal gangue of Bulianta mine is higher than that of Baode mine due to the different mineral constituents, and the two kind of DOM samples of coal gangue are all weakly alkaline. Among them, the DOM of Bulianta mine contains more conjugated double bonds or benzene ring simple aromatic compounds, more fulvic acid and the terrestrial humus with larger molecular weight, and the content of DOM is generally higher than that of Baode mine. But the fulvic acid and tyrosine organic matter content in Baode mine coal gangue are relatively high. According to the calculation results of FI, BIX and HIX indices of DOM samples, the DOM in two kinds of coal gangues is mainly endogenous organic matter, and it has strong spontaneous source characteristics. The earlier the geological time of coal gangue formation is, the more obvious the "microorganism source" feature of coal gangue of DOM samples are.

Keywords

coal gangue, dissolved organic matter, three-dimensional fluorescence, parallel factor analysis

DOI

10.3969/j.issn.1001-1986.2019.03.027

Recommended Citation

SUN Yanfang, ZHAO Li, LUO Shaohe, et al. (2019) "Comparison of dissolution characteristics of organic matter in coal gangue of different geological time," Coal Geology & Exploration: Vol. 47: Iss. 3, Article 28.
DOI: 10.3969/j.issn.1001-1986.2019.03.027
Available at: https://cge.researchcommons.org/journal/vol47/iss3/28

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