洞察出外源电子媒介在微生物电解细胞中的生物脱的增强机制
Yingping Zhou1, Yuchen Chen1, Jiayi Yang1
1School of the Environment, State Key Laboratory for Pollution Control and Resource Reuse, Nanjing University Xianlin Campus, Nanjing 210023, China.
The Science of the total environment
|June 24, 2023
概括
电子介质通过改善细胞外电子转移到微生物,显著增强了自性脱化. 这项研究研究了六种介质,发现Nano-Fe3O4在酸盐去除和生物膜活性方面最有效.
科学领域:
- 环境微生物学 环境微生物学
- 环境化学环境化学
- 生物技术是生物技术.
背景情况:
- 在地表水中持续积聚酸盐是一个重大的环境问题.
- 使用电子补充剂的自营性脱化提供了无碳的解决方案,但在细胞外电子转移效率方面面临挑战.
- 电子介质被提议用于增强微生物系统中的细胞外电子转移.
研究的目的:
- 研究六种不同的电子介质在微生物电解细胞系统中对酸盐去除的促进作用和途径.
- 量化电子介质对生物膜特性和脱效率的影响.
- 为了比较各种电子介质在增强自营性脱化中的相对性能.
主要方法:
- 利用微生物电解细胞系统进行自营性脱,并补充电子.
- 引入了六种电子介质: рибофлавин,黄单核酸,AQS,AQDS,生物炭和纳米-Fe3O4.
- 量化去除率,生物膜特征 (生长,活性,导电纳米线,电化学活性物质) 和微生物社区/基因丰富度.
主要成果:
- 所有六个电子介质都促进了酸盐去除率的76.03-90.43%.
- 调解剂增强了阴极生物膜的生长和活性,导电纳米线的产生,以及电化学活性物质的合成.
- 电化学分析显示,生物膜的导电性和氧化还原能力增加,促进了电子转移.
- 调解者高调节了脱化社区和基因,效率排名:纳米-Fe3O4 > рибофлавин > 弗拉单核酸 > AQS ≈ AQDS > 生物炭.
结论:
- 电子介质通过改善细胞外电子转移和微生物活动,有效地增强了自性脱化.
- 电子介质的选择显著影响了脱效率,纳米-Fe3O4显示了最高的性能.
- 这项研究阐明了电子介质促进脱化的机制,为水资源整治策略提供了见解.
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