Yu Shuyu, Li Jinning, Du Dandan, Li Hao, Hao Jiayong, Teng Zedong, Ji Xiang
College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.
College of Life Sciences, Inner Mongolia Agricultural University, Hohhot 010010, China.
Biology (Basel). 2025 Jun 21;14(7):741. doi: 10.3390/biology14070741.
Coal gangue, a primary byproduct of coal mining, causes significant environmental harm due to its improper utilization. This research proposes integrating microalgae with coal gangue-derived ecological products to improve soil conditions in ecologically vulnerable coal-mining regions. A field-scale experiment at the Jintong Coal Mine tested soils amended with varying proportions of a coal gangue ecological matrix (0%, 10%, 30%, and 50%), with and without microalgae inoculation. The results demonstrated that coal gangue addition caused undesirable soil pH decreases (11.3042.20%) while increasing total dissolved solids (506.88524.93%) and organic matter (8.51~46.81%). These effects were mitigated by the presence of microalgae. Microalgae play a role in regulating soil nutrient profiles, enhancing enzymatic activities, and modulating the microbial community structure. For example, they restored catalase activity under the stress imposed by coal gangue and stimulated urease activity at higher coal gangue proportions. Plant growth trials revealed that adding 30% coal gangue or combining coal gangue with microalgae significantly promoted the growth of L. In summary, coupling the coal gangue ecological matrix with microalgae effectively enhances soil quality. Maintaining the coal gangue addition at 30% or less in conjunction with microalgae application represents an optimal approach for soil improvement in mining areas.
煤矸石是煤炭开采的主要副产品，由于其利用不当而对环境造成重大危害。本研究提出将微藻与煤矸石衍生的生态产品相结合，以改善生态脆弱的煤矿区土壤条件。在金通煤矿进行了一项田间规模试验，测试了添加不同比例煤矸石生态基质（0%、10%、30%和50%）且接种或未接种微藻的土壤。结果表明，添加煤矸石导致土壤pH值出现不良下降（11.30%42.20%），同时总溶解固体增加（506.88%524.93%），有机质增加（8.51%~46.81%）。微藻的存在减轻了这些影响。微藻在调节土壤养分状况、增强酶活性和调节微生物群落结构方面发挥作用。例如，它们在煤矸石施加的胁迫下恢复了过氧化氢酶活性，并在煤矸石比例较高时刺激了脲酶活性。植物生长试验表明，添加30%的煤矸石或将煤矸石与微藻结合显著促进了[植物名称未给出]的生长。总之，将煤矸石生态基质与微藻相结合可有效提高土壤质量。在矿区土壤改良中，将煤矸石添加量保持在30%或以下并结合微藻应用是一种最佳方法。
