通过对电活性生物膜的光遗传增强,改善基于微生物燃料电池的生物传感反应
Zhourui Liu1,2, Yinan Liu1,2, Aloysius Teng1,2
1Singapore Centre for Environmental Life Sciences Engineering, Interdisciplinary Graduate Program, Nanyang Technological University, Singapore 637551, Singapore.
Environmental science & technology
|June 16, 2025
概括
光遗传学增强微生物燃料电池生物传感器中的电活性生物膜,以快速检测污染物. 这种方法显著减少了水监测中的Cr(VI等污染物的检测时间.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 电化学 电化学 电化学
背景情况:
- 早期检测水污染物对于环境监测至关重要.
- 基于微生物燃料电池 (MFC) 的生物传感器提供自动供电的在线污染物检测,使用电活性生物膜 (EAB).
- 自然形成的EAB表现出动态行为,限制了MFC生物传感器的性能.
研究的目的:
- 通过增强电活性生物膜,开发一种基于MFC的快速响应和敏感的生物传感器.
- 利用光遗传学方法控制和改善电极上的生物膜形成.
- 为了能够快速和强大的早期检测水排放中的污染物.
主要方法:
- 纳入近红外 (NIR) 响应光的合成 bis(3'-5') - 循环二元格瓦诺辛单酸盐 (c-di-GMP) 模块到*Shewanella oneidensis*.
- 在NIR光下,在阳极上促进了增强的生物膜形成.
- 在实验室和自然水矩阵中评估了生物传感器性能和对Cr (VI) 的响应机制.
主要成果:
- 改进的EAB显著减少了Cr (VI) 探测时间,从30分钟降至3分钟.
- 传感性能的改善持续了三个周期,Cr (VI) 度波动.
- 分析显示,通过Cr(VI) 增强EAB分散是改善生物传感器响应的机制.
结论:
- 对*S. oneidensis*生物膜的光遗传增强可以提高MFC生物传感器的速度和灵敏度.
- 开发的生物传感器在自然水样中表现出强大的性能.
- 这项研究提供了一个概念验证,用于控制生物膜动态,以快速检测污染物.
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