磁铁增强了酸盐降解和Fe (II) 氧化过程中的As固定,由Acidovorax sp. 这种菌株是BoFeN1菌株
Qianwen Liu1, Huiqian Dai1, Yang Song1
1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha 410083, PR China.
The Science of the total environment
|June 23, 2024
概括
添加磁石显著增强了微生物铁氧化过程中的固定,将去除效率从75.4%提高到97.2%. 这种方法提供了一个具有成本效益的解决方案,用于修复被污染的地下水.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物学 微生物学
背景情况:
- 地下水中的循环与铁的生物地球化学和矿物转化有关.
- 铁矿物质可以作为核化部位和铁氧化催化剂.
- 磁石在无氧环境中普遍存在,在那里通常溶解.
研究的目的:
- 研究磁铁在降铁二氧化 (NRFO) 过程中增强固定中的作用.
- 了解磁铁如何影响NRFO过程和封存.
- 评估磁石作为污染地下水现场整治的潜在剂.
主要方法:
- 使用过的Acidovorax sp. 使用过的 菌株BoFeN1用于酸盐降解Fe (II) 氧化,在磁铁存在或不存在的情况下.
- 监测 (As(III)) 的去除效率和Fe(II) 的氧化率.
- 分析了细胞外聚合物 (EPS) 生产,并对固体相进行了X射线光电子谱学 (XPS).
主要成果:
- 添加磁铁增加了从75.4%到97.2%的As (III) 去除效率.
- 磁铁激发了EPS的产生,加速了酸盐的减少和Fe (II) 的氧化.
- 磁石促进了 (III) 到 (V) 的氧化 (43.8%的转化被XPS证实).
结论:
- 磁石通过促进微生物的铁氧化和As (III) 氧化,显著增强了的固定.
- 磁铁对EPS生产和Fe (II) 化学氧化的影响对于修复至关重要.
- 本研究提出了一种具有成本效益和环保的方法,用于在现场处置被污染的地下水.
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