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Coal Mining Activities Driving the Changes in Microbial Community and Hydrochemical Characteristics of Underground Mine Water

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  • Li Zhang

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China)

  • Zhimin Xu

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
    Fundamental Research Laboratory for Mine Water Hazards Prevention and Controlling Technology, Xuzhou 221006, China)

  • Yajun Sun

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
    Fundamental Research Laboratory for Mine Water Hazards Prevention and Controlling Technology, Xuzhou 221006, China)

  • Yating Gao

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China)

  • Lulu Zhu

    (School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

Coal mining can cause groundwater pollution, and microorganism may reflect/affect its hydrochemical characteristics, yet little is known about the microorganism’s distribution characteristics and its influence on the formation and evolution of mine water quality in underground coal mines. Here, we investigated the hydrochemical characteristics and microbial communities of six typical zones in a typical North China coalfield. The results showed that hydrochemical compositions and microbial communities of the water samples displayed apparent zone-specific patterns. The microbial community diversity of the six zones followed the order of surface waters > coal roadways > water sumps ≈ rock roadways ≈ goafs > groundwater aquifers. The microbial communities corresponded to the redox sensitive indices’ levels. Coal roadways and goafs were the critical zones of groundwater pollution prevention and control. During tunneling in the panel, pyrite was oxidized by sulfur-oxidizing bacteria leading to SO 4 2− increase. With the closure of the panel and formation of the goaf, SO 4 2− increased rapidly for a short period. However, with the time since goaf closure, sulfate-reducing bacteria (e.g., c_Thermodesulfovibrionia , Desulfobacterium_catecholicum , etc.) proportion increased significantly, leading to SO 4 2− concentration’s decrease by 42% over 12 years, indicating the long-term closed goafs had a certain self-purification ability. These findings would benefit mine water pollution prevention and control by district.

Suggested Citation

  • Li Zhang & Zhimin Xu & Yajun Sun & Yating Gao & Lulu Zhu, 2022. "Coal Mining Activities Driving the Changes in Microbial Community and Hydrochemical Characteristics of Underground Mine Water," IJERPH, MDPI, vol. 19(20), pages 1-22, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:20:p:13359-:d:943931
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    References listed on IDEAS

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    1. Yuanyuan Shen & Yu Ji & Chunrong Li & Pingping Luo & Wenke Wang & Yuan Zhang & Daniel Nover, 2018. "Effects of Phytoremediation Treatment on Bacterial Community Structure and Diversity in Different Petroleum-Contaminated Soils," IJERPH, MDPI, vol. 15(10), pages 1-17, October.
    2. Shuai Li & Lifeng Yu & Wanjun Jiang & Haoxuan Yu & Xinmin Wang, 2022. "The Recent Progress China Has Made in Green Mine Construction, Part I: Mining Groundwater Pollution and Sustainable Mining," IJERPH, MDPI, vol. 19(9), pages 1-19, May.
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