铁介导的DAMO-anammox过程:揭示了电子转移的机制
Ran Gao1, Hao Jin1, Mengru Han1
1School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
Journal of environmental management
|March 23, 2024
概括
铁通过促进电子转移来增强DAMO-anammox过程. 这项研究揭示了铁.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 生物技术是生物技术.
背景情况:
- 酸盐-脱无氧甲氧化-无氧氨氧化 (DAMO-anammox) 过程对去除和甲缓解至关重要.
- 了解电子转移机制是优化这一过程以实现碳排放减少和碳中和目标的关键.
研究的目的:
- 为了研究铁在调解DAMO-anammox系统内的电子转移中的作用.
- 阐明铁,细胞外聚合物物质 (EPS) 和功能微生物之间的相互作用.
主要方法:
- 在不同铁度下对EPS功能群的铁结合的分析.
- 监测Fe3+降解为Fe2+及其与微生物和EPS的相互作用.
- 使用三维光谱来评估铁对微生物分泌物的影响.
- 量化细胞染色体c和相关功能基因 (resa,ccda) 的表达.
- 评估微生物群落,功能基因 (pily1) 和代谢物 (riboflavin) 之间的相关性.
主要成果:
- 铁3+与EPS功能组结合,结合模式因铁度而异.
- 发生Fe3+降解为Fe2+,两种形式与微生物和EPS相互作用.
- 铁会影响氨酸和氨酸的分泌,这对细胞染色体的合成至关重要.
- 铁3+加速c型细胞色素介导的细胞外电子转移 (EET),铁度较高导致细胞色素c的表达增加.
- 达摩古生物与细胞染色体c合成基因 (resa,ccda) 和pilY1基因具有积极的相关性,这表明潜在的直接物种间电子转移 (DIET).
- 无化微生物与 рибофлавин的丰富性相关,表明其作为电子穿机的作用.
结论:
- 铁在DAMO-anammox过程中起到关键的调解作用,通过增强EET通过细胞染色体c,并可能使食成为可能.
- 铁对微生物代谢和EPS成分的影响对于有效的去除和甲减轻至关重要.
- 这项研究为环境应用优化铁介导的DAMO-anammox系统提供了洞察力,有助于碳中和努力.
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