电活性生物膜改变了EPS结构和代谢途径,以感知潜能和四环素
Fenglin Li1, Lean Zhou1, Shu Wang2
1Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China.
Journal of hazardous materials
|January 30, 2025
概括
电极潜力会影响微生物细胞外聚合物物质 (EPS) 的分泌,影响电子转移和污染物降解. 优化潜力通过平衡EPS以提高效率和自我保护来增强生物修复.
科学领域:
- 微生物的电化学
- 生物修复是一种生物修复.
- 细胞外聚合物质 (EPS) 是一种
背景情况:
- 对于微生物电子转移和毒素耐药性来说,EPS分泌非常重要.
- 电极电位对电子传输速率和方向产生重大影响.
- 电极电位对EPS结构和有毒物质去除的调节机制尚不清楚.
研究的目的:
- 调查电极电位如何调节EPS结构和功能.
- 阐明电极电位在微生物中有毒物质去除中的作用.
- 通过对电极潜力进行操纵,为增强生物修复提供理论支持.
主要方法:
- 控制的电化学实验改变电极电位.
- 对EPS成分 (蛋白质和多糖) 的分析.
- 评估微生物活动和社区结构 (地质细菌的丰富性).
- 测量有毒物质 (四环素) 降解速率.
- 对代谢途径的研究.
主要成果:
- 更多的积极潜力增加了细胞外蛋白和多糖 (PS) 的分泌.
- 过度的PS分泌在正极限的电流输出.
- 负潜力 (-0.1 V) 有利于更稳定的蛋白质结构 (α-螺旋和α-螺旋/β-片) 和更高的Geobacter丰度 (86%).
- 在有毒挑战 (四环素) 下,负潜能保持了更高的微生物活性,并实现了比高潜能降解率高1.5倍的降解率,这与上调的氨基酸代谢有关.
结论:
- 可以使用电极电位来调节EPS平衡,以优化电子传输和微生物自我保护.
- 负电极潜力增强了微生物对四环素等有毒物质的耐药性.
- 通过电极潜力操纵EPS分泌物为提高生物修复效率提供了一个有希望的策略.
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