Critical steps in the restoration of coal mine soils: Microbial-accelerated soil reconstruction

• Published in: Journal of environmental management Vol. 368; p. 122200
• Main Authors: Lu, Zijing, Wang, Hengshuang, Wang, Zhixiang, Liu, Jiazhi, Li, Yinta, Xia, Ling, Song, Shaoxian
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-09-2024
• Subjects: Coal based solid waste; Microbial remediation; Soil aggregates; Soil remediation; Microbial remediation; Soil remediation; Coal based solid waste; Soil aggregates
• ISSN: 0301-4797; 1095-8630; 1095-8630
• DOI: 10.1016/j.jenvman.2024.122200

Soil reconstruction is a critical step in the restoration of environments affected by mining activities. This paper provides a comprehensive review of the significant role that microbial processes play in expediting soil structure formation, particularly within the context of mining environment restoration. Coal gangue and flotation tailings, despite their low carbon content and large production volumes, present potential substrates for soil reclamation. These coal-based solid waste materials can be utilized as substrates to produce high-quality soil and serve as an essential carbon source to enhance poor soil conditions. However, extracting active organic carbon components from coal-based solid waste presents a significant challenge due to its complex mineral composition. This article offers a thorough review of the soilization process of coal-based solid waste under the influence of microorganisms. It begins by briefly introducing the primary role of in situ microbial remediation technology in the soilization process. It then elaborates on various improvements to soil structure under the influence of microorganisms, including the enhancement of soil aggregate structure and soil nutrients. The article concludes with future recommendations aimed at improving the efficiency of soil reconstruction and restoration, reducing environmental risks, and promoting its application in complex environments. This will provide both theoretical and practical support for more effective environmental restoration strategies.
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•Microbial treatment is a promising soil remediation technology for mining areas.•Coal-based solid wastes can serve as potential substrates for soil remediation.•In situ microbial remediation can actively improve soil structure and nutrients.•Microorganism selection and nutrient regulation are crucial for remediation.