微生物降低低晶度三聚酸 (FeSbO4):对污染环境中的Sb(V) 循环的影响
Yidan Zhang1, Maxim I Boyanov2, Edward J O'Loughlin3
1Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea.
Journal of hazardous materials
|January 21, 2026
概括
三氧化 (FeSbO4) 溶解释放出反 (Sb). 由AQDS增强的微生物降解铁,通过将Sb(V) 转化为Sb(III) 来固定Sb,形成瓦伦丁石 (Sb2O3).
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:
- 三岩 (FeSbO4) 是一种关键的含矿物质,在受污染的地点影响Sb的流动性.
- 在无氧,微生物活性条件下,FeSbO4的结构稳定性和氧化还原行为尚未得到充分理解.
- 预测天然反循环需要了解FeSbO4在减少环境中的命运.
研究的目的:
- 为了研究无氧微生物群落与三氧化 (FeSbO4) 之间的相互作用.
- 确定微生物还原过程如何影响FeSbO4.4的结构稳定性和Sb流动性.
- 在无氧条件下阐明与FeSbO4相关的的氧化还原转换和物种变化.
主要方法:
- 在不同的条件下,FeSbO4与无氧微生物群体的化,包括存在 antraquinone-2,6-disulfonate (AQDS).
- 分析Sb(V) 释放和重新固定的情况.
- 微生物社区分析以确定关键的Fe (III) 降解细菌.
- 采用X射线吸收细结构 (XAFS) 光谱和扫描电子显微镜 (SEM) 来描述矿物阶段和Sb的特异化.
主要成果:
- FeSbO4经历了部分溶解,即使没有微生物活动,也释放了Sb(V).
- 微生物Fe (III) 的降低,特别是AQDS,导致释放的Sb.的重新固定.
- XAFS和SEM证实,在经过AQDS修改的治疗中,形成了一个与瓦伦丁酸盐 (Sb2O3) 一致的Sb(III) 承载阶段,与瓦伦丁酸盐 (Sb2O3) 一致.
- 使用乙酸盐的Fe (III) 减少细菌被确定为Fe减少的关键驱动因素.
结论:
- 在无氧环境中,FeSbO4易受微生物介导的氧化还原转换.
- 由AQDS增强的微生物减少过程显著改变了Sb的移动性和物种化.
- 在这些系统中,将Sb (V) 转化为Sb (III) 和随后固定为Sb2O3是控制Sb命运的关键机制.
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