Guo Nan, Bai Lu, Yang Yingming, Wang Fei
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing, 102211, China.
National Institute of Clean-and-Low-Carbon Energy, Beijing, 102211, China.
Sci Rep. 2025 Apr 1;15(1):11068. doi: 10.1038/s41598-025-88227-6.
Coal resources are extensive exploitation and utilization. As a result, a large amount of coal based solid waste such as coal gangue, fly ash, and coal gasification slag was generated. These coal based solid wastes piled up indiscriminately will occupy land and pollute the ecological environment. Turning waste into treasure is an important way to dispose of these solid wastes. This study explored the feasibility of using coal gangue, fly ash and coal gasification slag as additives to improve the soil in mining areas. Conduct experimental verification of materials using physical and chemical methods. The research results indicate that coal gangue, fly ash, and coal gasification slag can be used as soil additives. Adding low content additives to the soil, such as a mixed matrix of 4% coal gangue, 2% fly ash, and 1% coal gasification slag, is superior to soil nutrients and can be used as an environmentally friendly matrix.
煤炭资源被广泛开采和利用。因此，产生了大量的煤矸石、粉煤灰和煤气化炉渣等煤基固体废弃物。这些随意堆放的煤基固体废弃物会占用土地并污染生态环境。变废为宝是处理这些固体废弃物的重要途径。本研究探讨了利用煤矸石、粉煤灰和煤气化炉渣作为添加剂改良矿区土壤的可行性。采用物理和化学方法对材料进行实验验证。研究结果表明，煤矸石、粉煤灰和煤气化炉渣可作为土壤添加剂。向土壤中添加低含量添加剂，如4%煤矸石、2%粉煤灰和1%煤气化炉渣的混合基质，优于土壤养分，可作为环保基质。
