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ORIGINAL RESEARCH article

Front. Environ. Sci.
Sec. Soil Processes
Volume 12 - 2024 | doi: 10.3389/fenvs.2024.1502552

Study on the synergistic preparation of functional soil from multiple coal-based solid wastes

Provisionally accepted
Yanan LIU Yanan LIU 1Fenglan Han Fenglan Han 2,3*Ning Li Ning Li 2Fu Yuan Dong Fu Yuan Dong 2Changcong An Changcong An 4Wenna Yang Wenna Yang 5Tingfeng Li Tingfeng Li 5
  • 1 Institute of Materials Science and Engineering, North Minzu University, North Minzu University, Yinchuan, China
  • 2 Institute of Materials Science and Engineering, North Minzu University, Yinchuan, China
  • 3 International Scientific & Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials, Yinchuan, China
  • 4 Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, Beijing, China
  • 5 Ningxia Comprehensive Agricultural Development Centre, Yinchuan, China

The final, formatted version of the article will be published soon.

    Three coal-based solid wastes-fly ash (FA), gasification slag (GS), and coal gangue (CG)-were used to prepare functional soil (FGC) for the ecological restoration of mining areas. It not only solves the problem of shortage of soil resources in the mining area, but also realizes the resourceful use of coal-based solid waste. Investigating the functional soil physicochemical properties and oatgrass growth characteristics revealed the optimal functional soil ratios. Compared with the control (CK) at 30 d, the average pH of the FGC3 (FA: 50wt%; GS: 25wt%; CG: 25wt%) decreased from 9.54 to 8.54, the average organic matter content increased from 2.57% to 7.60%, and the average available potassium and ammonium nitrogen content increased from 38.02 and 2.83 mg•kg -1 to 53.46 and 3.21 mg•kg -1 , respectively. Functional soil bulk density and porosity were superior to Sandy soil somewhere in Ningxia (SL) for GS and CG contents <25wt%. GS and CG significantly improved oatgrass agronomic traits. Compared with CK the average plant height, stem thickness, fresh weight, and dry weight of oatgrass in FGC3 increased from 17.68 cm, 0.99 mm, 0.09 g, and 0.02 g to 27.0 cm, 1.26 mm, 0.24 g, and 0.04 g, respectively. And chlorophyll content was increased by 20.39% compared with CK. This study verified the feasibility of the synergistic preparation of functional soils from three coal-based solid wastes and provides reference for the ecological restoration and large-scale utilization of coal-based solid wastes.

    Keywords: Coal-based solid waste, functional soil, Physical properties, Chemical properties, Agronomic traits

    Received: 27 Sep 2024; Accepted: 27 Dec 2024.

    Copyright: © 2024 LIU, Han, Li, Dong, An, Yang and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Fenglan Han, Institute of Materials Science and Engineering, North Minzu University, Yinchuan, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.