在硫化铁驱动的自性脱生物过器中去除酸盐:生物化学和化学转化途径及其潜在的微生物机制
Yang Bai1, Huanhuan Hu1, Po-Heng Lee2
1Civil Engineering, School of Engineering, College of Science and Engineering, University of Galway, Galway H91 TK33, Ireland.
The Science of the total environment
|August 5, 2023
概括
硫化铁自身化 (IAD) 有效地处理酸盐废水. 这项研究揭示了IAD生物过器中被忽视的化学酸盐减少和复杂的微生物通路,包括DNRA和Sulfammox.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 环境化学环境化学
背景情况:
- 使用硫化铁 (IAD) 的自转型脱是一种有前途的方法,用于从污染水中去除酸盐.
- 然而,在IAD系统中,复杂的酸盐转化途径及其与硫和铁的生物地球化学循环的相互作用仍然不完全理解.
研究的目的:
- 阐明基于硫化铁的自无化 (IAD) 系统中复杂的转化途径.
- 研究非生物化学反应和生物微生物过程在酸盐去除中的作用.
主要方法:
- 两个连续流动柱的比较分析:一个非生物和一个生物 (IAD生物过器),两者都装有硫化铁 (FeS).
- 使用X射线光电子谱学 (XPS) 进行化学表征.
- 使用元基因组学进行微生物社区分析.
主要成果:
- 活体FeS柱显示,酸盐自发化学降解为,这是IAD中以前被低估的途径.
- 生物性IAD生物过器表现出一个复杂的网络,包括化学还原,自性脱,分散性酸盐还原到氨 (DNRA) 和硫酸盐还原氨氧化 (Sulfammox).
- 甲基因组和XPS分析证实了特定微生物群落 (例如,Acidovorax,Diaphorobacter,Desulfuromonas) 在与铁和硫循环相关的酸盐减少中的参与.
结论:
- 这项研究提供了对IAD系统中变化的全面了解.
- 它强调了非生物化学酸盐减少与复杂的微生物过程相结合的重要贡献.
- 这些发现提供了对驱动IAD的微生物机制的基本见解,支持其未来在废水中的生物去除中的应用.
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