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脱碳煤气化废渣在改善土壤质量的资源利用:对微生物群落组成和环境风险评估的新见解
Longfei Kang1, Qiang Li2, Kenneth Dumack3
1Shaanxi Key Laboratory of Ecological Restoration in Shaanbei Mining Area, College of Advanced Agricultural Sciences, Yulin University, Yulin, Shaanxi Province 719000, China; Terrestrial Ecology, Institute of Zoology, University of Cologne, Cologne 50674, Germany.
Ecotoxicology and environmental safety
|March 27, 2025
概括
脱碳煤气化渣 (DCGS) 通过增加土壤有机碳和微生物多样性来改善沙土质量和料价值. 建议的应用率为60t·ha-1以确保安全和环保的利用.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 脱碳煤气化废渣 (DCGS) 是一个重要的基于煤的固体废物,带来了环境挑战.
- 有效利用DCGS对于煤炭化学工业的可持续发展至关重要.
- 用DCGS修改土壤是一个潜在的高价值应用途径.
研究的目的:
- 评估使用DCGS作为沙性土壤中的土壤修正物的可行性.
- 评估DCGS对土壤特性,微生物群落和料质量的影响.
- 为了确定DCGS在沙性土壤中的最佳应用率.
主要方法:
- 在沙土中使用DCGS作为土壤修正物的实地试验.
- 16S rRNA基因测序以分析细菌社区结构和多样性.
- 土壤质量评估,包括pH值,有机碳和酶活性.
- 部分最小平方路径建模和曼特尔测试以确定关键影响因素.
- 测量莱姆斯中国种的相对料价值 (RFV).
主要成果:
- 添加DCGS显著增加了土壤pH值,土壤有机碳 (22.4%),性酸酶 (ALP) 活性 (16.5%) 和细菌α多样性.
- 土壤微生物生物质碳,和的含量随着DCGS应用率的提高而增加.
- DCGS显著改变了细菌β多样性和微生物共发生网络拓.
- 与对照组相比,DCGS修改显著提高了Leymus chinensis的土壤质量和RFV.
- 土壤pH和p_Methylomirabilota是土壤质量的关键因素,而土壤ALP和p_Entotheonellaeota影响了RFV.
结论:
- 用DCGS修改土壤是一种可行的方法,可以改善沙土质量,并提高Leymus chinensis的料价值.
- 根据生态风险评估,对沙土的DCGS推应用率为60t·ha-1 (DCGS3).
- 使用DCGS作为土壤修补剂提供了一种安全,环保和可持续的方法来管理基于煤炭的固体废物.
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