桥介导电子转移:生物启发的氧化通信,用于持续的酸盐独立的无氧化氧化
Quanhao Dou1,2, Jiachun Yang3, Li Zhang1,2
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
Journal of the American Chemical Society
|June 11, 2025
概括
这项研究通过使用导电材料来改善亚纳摩克斯细菌的电子转移,从而提高了废水中的去除效果,从而实现了无酸盐的可持续去除. 这一突破支持废水处理和碳中和目标.
科学领域:
- 环境微生物学
- 生物技术
- 废水处理
背景情况:
- 通过无氧氧化 (anammox) 进行可持续的去除受实际废水中酸盐 (NO2-) 缺乏限制.
- 微生物细胞外电子转移 (EET) 提供了亚酸盐独立的anammox路径,但缓慢的微生物材料接口电子转移阻碍了应用.
研究的目的:
- 增强微生物细胞外电子转移 (EET) 对于酸盐独立的anammox.
- 在真实的废水条件下改进anammox的工程应用.
主要方法:
- 使用导电桥梁材料,特别是由富含黄素的细胞外聚合物封装的Fe2O3纳米粒子,以增强anammox细菌和不溶性受体之间的电接触.
- 研究了Fe2O3介导的氧化还原信号 (Fe2+/Fe3+) 对于微生物代谢协调和自营生长.
- 监测氨去除效率,操作稳定性和微生物群体结构的变化.
主要成果:
- 在anammox细菌-Fe2O3接口实现了高电子流量 (6.86 mA·cm-2),明显高于之前的报道.
- 已证明稳定的氨去除 (约. 在有限的化物条件下连续使用超过150天.
- 通过Fe2+/ Fe3+氧化还原信号,观察到异形细菌的自营增长 (127. 22%的相对丰度增加) 和改善的代谢协调.
结论:
- 拟议的战略有效地克服了废水处理中的化物供应挑战,使得anammox能够有效地使用ETE.
- Fe2O3纳米颗粒作为导电桥梁和氧化还原信号分子,促进亚纳摩克斯细菌的生存,生长和去除.
- 这种进步有助于可持续的废水处理,
相关概念视频
Oxidation and Reduction of Organic Molecules
6.2K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
6.2K
Electron Transport Chain: Complex III and IV
7.2K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
7.2K
The Supercomplexes in the Crista Membrane
2.5K
The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
2.5K
Electron Transport Chain: Complex I and II
12.1K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
12.1K
The Electron Transport Chain
16.3K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
16.3K
Role of Reduced Coenzymes NADH and FADH₂
11.2K
The energy released from the breakdown of the chemical bonds within nutrients can be stored either through the reduction of electron carriers or in the bonds of adenosine triphosphate (ATP). In living systems, a small class of compounds functions as mobile electron carriers, molecules that bind to and shuttle high-energy electrons between compounds in pathways. The principal electron carriers that will be considered originate from the B vitamin group and are derivatives of nucleotides; they are...
11.2K


