Experimental study on the preparation of soil-based substrate using composite coal gangue and additives
ZHANG Xiaowu
HUANG Xiaofen
GAO Lin
ZHANG Huarui
ZHANG Shuhui
ZHOU Bingjie
YANG Liuya
LIU Ping
QIU Yueqin
WANG Mingzhong
YANG Yushang
WANG Yongyin
Abstract：The large-scale stockpiling of coal gangue causes issues such as the occupation of arable land and environment-al pollution.Effective methods for the disposal and utilization of coal gangue are urgently needed.To this end,starting from common raw materials,coal gangue and auxiliary materials were used as raw materials to prepare soil-like substrates by mixing them in different proportions.Pot experiments were conducted to observe crop growth under various mixing ra-tios.The optimal substrate composition suitable for crop growth was selected.Based on this,pot experiments were re-peated with the best ratio to evaluate the potential heavy metal risks in the substrate and the safety of agricultural products.Later,field trials were conducted with the same mixture to verify the effectiveness and feasibility of coal gangue-based soil substrates.The results show that reconstructing soil with coal gangue and additives is feasible.The optimal volume ra-tio of coal gangue to additives is 7∶3.The heavy metal content in the soil-like substrates meets national standards.Crops grown in field trials showed no excessive pollution,achieving the effect of"solid waste coordination".It provides a theor-etical basis and technical support for the soil utilization of coal gangue and ecological restoration in mining areas.
Keywords：coal ganguesoil-based substratepot experimentsfield experimentssolid waste synergy
Publication Date：2025-09-30
Online Publishing Date：2025-09-30(First online date of this platform, not the publication date of the document)
Pages：9( 93-101 )