Driven by a need for economic development, a large number of mines have been exploited, resulting in the destruction of large areas of vegetation and a significant deterioration in local ecological environment. In order to restore vegetation of mines in a timely manner, a new type of organic fertilizer needs to be developed. However, until now, there has been a lack of organic fertilizer with slow-release suitable for mine virescence. As the largest amount of solid waste in coal-fired power plants, coal fly ash presents a promising basis as a bioresource for developing this type of organic fertilizer. In our study, for the first time, fly ash was demonstrated to be an effective carrier matrix via hydrothermal-alkali treatment sintering process for solving the problem of low efficiency of fly ash adsorption for microorganisms via sintering process. Then, a novel slow-release microbial fertilizer which can adsorb a variety of microorganisms was produced using ethyl cellulose as a solvent adhesive. Finally, the pot experiment showed that the soil fertility of abandoned mines can be improved after applying the fly ash microbial fertilizer, and demonstrated the regreening effects with Pseudodrynaria coronans and Buxus microphylla. Our study provides a green engineering approach to recycle fly ash for regreening mines, as well as a new development direction for high-value green recyclable pathway of fly ash.

在经济发展的需求的驱使下，已经开发了许多地雷，导致大面积植被的破坏和当地生态环境的严重恶化。为了及时恢复矿山的植被，需要开发一种新型的有机肥料。但是，直到现在，仍缺乏适合矿山绿化的有机肥料和缓释剂。粉煤灰是燃煤电厂中最大的固体废物，它作为开发这种类型的有机肥料的生物资源提供了有希望的基础。在我们的研究中，首次通过水热碱处理烧结工艺证明了粉煤灰是有效的载体基质，解决了粉煤灰通过烧结工艺吸附微生物效率低的问题。然后，使用乙基纤维素作为溶剂粘合剂生产了一种新型的缓释微生物肥料，它可以吸附多种微生物。最后，盆栽试验表明，施用粉煤灰微生物肥料可以改善废弃矿山的土壤肥力，并证明了绿肥的复绿作用。假单胞菌冠和小叶黄杨。我们的研究提供了一种绿色工程方法来回收粉煤灰，用于矿山的再绿化，并为高价值的粉煤灰绿色可回收途径提供了新的发展方向。