使用旋转盘电极揭示电化学活性硫化物氧化细菌中的细胞 (多) 硫化物储存
Rikke Linssen1, Sanne de Smit1, Katharina Röhring Neé Neubert2
1Environmental Technology, Wageningen University, P.O. Box 17, Bornse Weilanden 9, 6708 WG, Building Axis z, building nr. 118, 6700 AA Wageningen, the Netherlands.
Bioelectrochemistry (Amsterdam, Netherlands)
|April 18, 2024
概括
硫化物氧化细菌 (SOB) 运送硫化物用于生物电化学去除. 这项研究研究了SOB的氧化还原行为,假设他们在无氧硫化物氧化过程中形成和吸收多硫化物.
科学领域:
- 环境微生物学环境微生物学
- 电化学 电化学 电化学
- 生物技术是生物技术.
背景情况:
- 硫化物氧化细菌 (SOB) 显示出生物电化学硫化物从废物流中去除的潜力.
- 在无氧条件下,SOB可以在空间上分离硫化物氧化和电子转移到电极,作为硫化物穿车.
- 无氧硫化物被SOB去除和储存电荷的机制,包括硫形成地点,仍然不清楚.
研究的目的:
- 在状条件下研究硫化物运输SOB的氧化还原行为.
- 阐明SOB无氧去除硫化物和储存电荷等价物的机制.
- 为了确定在这个过程中硫在哪里形成.
主要方法:
- 使用玻璃碳旋转盘电极 (RDE) 采用循环电压测量.
- 在没有和存在硫化物的情况下记录了SOB的伏特图.
- 这些与非生物硫物种溶液的伏特图进行了比较.
主要成果:
- 聚硫化物和硫化物表现出不同的氧化还原行为,具有不同的氧化电位 (> -0.3 V 对于聚硫化物,> -0.1 V 对于硫化物).
- 生物和非生物实验的比较表明,SOB在厌氧硫化物去除过程中形成多硫化物.
- 假设这些多硫化物仍然被细菌细胞吸收.
结论:
- 这项研究促进了对SOB中硫化物转运机制的理解.
- 这些发现表明,细胞吸收的多硫化物在SOB的无氧硫化物去除中发挥了作用.
- 为了优化生物电化学应用,需要进一步研究这些机制.
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