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Remediation of Acid Mine Drainage in the Haizhou Open-Pit Mine through Coal-Gangue-Loaded SRB Experiments

Author

Listed:
  • Yanrong Dong

    (College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China
    College of Mining, Liaoning Technical University, Fuxin 123000, China)

  • Ziqing Gao

    (College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China)

  • Junzhen Di

    (College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China)

  • Dong Wang

    (College of Mining, Liaoning Technical University, Fuxin 123000, China)

  • Zhenhua Yang

    (College of Mining, Liaoning Technical University, Fuxin 123000, China)

  • Xuying Guo

    (College of Science, Liaoning Technical University, Fuxin 123000, China)

  • Ying Li

    (Liaoning Institute of Geology and Mineral Resources Co., Ltd., Shenyang 110032, China)

  • Xiaotong Zhu

    (College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China)

  • Guixian Wang

    (College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China)

Abstract

To address the pollution problem of acid mine drainage (AMD) characterized by high concentrations of Fe 2+ , Mn 2+ , and SO 4 2− , a combination of coal gangue (CG) and sulfate-reducing bacteria (SRB) was employed. The effects of coal-gangue dosage, SRB inoculation concentration, and temperature on AMD treatment with coal-gangue-loaded SRB were determined through single-factor experiments and response surface methodology (RSM) experiments. By considering the principles of adsorption isotherms, adsorption kinetics, and reduction kinetics, the removal mechanisms of SO 4 2− , Fe 2+ , and Mn 2+ in AMD using coal gangue-loaded SRB in the the Haizhou open-pit mine was revealed. The results showed that the overall effectiveness of the four types of coal-gangue-loaded SRB in repairing AMD was as follows: 3# CG-loaded SRB > 2# CG-loaded SRB > 1# CG-loaded SRB > 4# CG-loaded SRB, with coal-gangue-loaded SRB in the the Haizhou open-pit mine showing the best performance. According to the RSM test, the optimum conditions for repairing AMD with coal-gangue-loaded SRB in the open-pit mine were a coal-gangue dosage of 52 g, SRB inoculation concentration of 11.7%, and temperature of 33.4 °C. The order of factors affecting the removal of SO 4 2− and Fe 2+ from AMD by SRB loaded on coal gangue was SRB inoculation concentration > temperature > coal-gangue dosage. For Mn 2+ , the order of influence was temperature > SRB inoculation concentration > coal-gangue dosage. In the process of repairing Fe 2+ with coal-gangue-loaded SRB in the the Haizhou open-pit mine, the biological activity metabolism of SRB played a leading role, while the adsorption isotherm of Mn 2+ followed the Freundlich model. The adsorption kinetics of coal-gangue-loaded SRB in the the Haizhou open-pit mine for Fe 2+ and Mn 2+ in AMD conformed to Lagergren’s second-order kinetic model, while the reduction kinetics of SO 4 2− conformed to a first-order reaction model.

Suggested Citation

  • Yanrong Dong & Ziqing Gao & Junzhen Di & Dong Wang & Zhenhua Yang & Xuying Guo & Ying Li & Xiaotong Zhu & Guixian Wang, 2023. "Remediation of Acid Mine Drainage in the Haizhou Open-Pit Mine through Coal-Gangue-Loaded SRB Experiments," Sustainability, MDPI, vol. 15(12), pages 1-19, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:12:p:9375-:d:1167994
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    References listed on IDEAS

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    1. Yanlong Li & Mingyuan Xu & Quan Li & Anjun Gai & Tianhua Yang & Rundong Li, 2022. "Study on the Properties and Heavy Metal Solidification Characteristics of Sintered Ceramsites Composed of Magnesite Tailings, Sewage Sludge, and Coal Gangue," IJERPH, MDPI, vol. 19(17), pages 1-14, September.
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