固定硫酸盐还原细菌 (SRB) 提高了生物炭对 Zn 的被动化性能
Shaocheng Si1, Yuxin Ke1, Boqian Xue1
1College of Urban and Environmental Science, Northwest University, Xi'an 710127, China; Shaanxi Key Laboratory of Earth Surface System and Environment Carrying Capacity, Xi'an 710127, China.
The Science of the total environment
|June 3, 2023
概括
生物炭固定硫酸盐降解细菌 (SRB14-2-3) 能够有效地使污染的土壤变得无源. 这种方法增强了细菌的生存,并减少了可生物利用的,为重金属土壤整治提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 土壤科学 土壤科学
背景情况:
- 重金属污染土壤的微生物修复面临挑战,因为在恶劣环境中微生物的生存率很低.
- 生物炭被探索为一种载体,以固定耐金属细菌,以改善土壤修复.
- 硫酸盐降解细菌 (SRB14-2-3) 被确定为被动化的有希望的候选者.
研究的目的:
- 为了研究生物炭固定SRB14-2-3对污染土壤被动化的有效性.
- 评估固定细菌对生物可利用的分数和细菌繁殖的影响.
- 评估生物炭和固定细菌对土壤修复和长期应用的协同效应.
主要方法:
- 将SRB14-2-3细菌固定在生物炭上.
- 固定细菌 (IBWS14-2-3) 应用于不同度 (350,750,1500毫克·公斤-1) 的土壤.
- 对总生物可用分数 (可交换+碳酸盐) 和细菌群动态的分析.
主要成果:
- 动不动的细菌 (IBWS14-2-3) 显示出显著的被动化性能,在初始度分别为350,750和1500毫克·公斤-1的土壤中,可生物利用的减少了34.2%,30.0%和22.2%.
- 生物炭保护增强了SRB14-2-3的繁殖,在各自受污染的土壤中,种群增加了82,278,42和5倍.
- 固定细菌的应用减轻了生物炭对土壤的潜在不良影响.
结论:
- 生物炭固定式SRB14-2-3是一种高度有效的污染土壤被动化策略.
- 这种方法改善了微生物的生存,提高了修复效率,并为重金属污染提供了可持续的解决方案.
- 进一步的研究应该集中在固定细菌的现场性能上,以便在土壤修复中实际应用.
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