使用CuO合活性炭在没有膜的MFC中减轻阴极生物污染:对批量和连续模式的比较研究
Nasser A M Barakat1, Hazem Gamal2, Rania Osama2
1Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia, 61516, Egypt. nasbarakat@mu.edu.eg.
Scientific reports
|November 23, 2025
概括
这项研究引入了一种新的无膜微生物燃料电池,使用氧化铜激活碳阴极,显著提高功率输出,防止生物污染,以有效处理废水和回收能源.
科学领域:
- 电化学 电化学 电化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 微生物燃料电池 (MFC) 为废水处理和能源发电提供了一种可持续的方法.
- 阴极材料的生物污染仍然是一个重大挑战,阻碍了长期的MFC性能.
- 开发具有增强催化活性和抗生物污染性质的具有成本效益的阴极材料对于MFC商业化至关重要.
研究的目的:
- 开发和评估一个没有膜的微生物燃料电池 (MFC) 系统,使用 CuO 嵌入式活性碳 (CuO/AC) 阴极.
- 评估CuO/AC阴极的双重功能,以提高氧降解反应 (ORR) 活性和抗菌性能.
- 为了比较CuO/AC阴极的性能和稳定性与原始AC和AC-CNTs阴极在批量和连续MFC操作中.
主要方法:
- 通过湿浸和热处理合成CuO/AC复合阴极.
- 使用不同阴极材料 (CuO/AC,AC,AC-CNTs) 的MFC在批量和连续模式中的性能评估.
- 分析功率密度,电流密度,开放电池潜力 (OCP),化学氧需求 (COD) 清除效率和生物污染抵抗.
- 对正极表面进行显微镜检查,以评估微生物殖民.
主要成果:
- 10wt%的CuO/AC阴极表现出最佳性能,达到最大功率密度约1.25W/m2和峰值电流密度约5.2A/m2.
- 与AC-CNTs阴极相比,CuO/AC阴极表现出优越的长期稳定性 (~0.85-1.0 V OCP超过40天) 并有效防止生物污染.
- 与批量模式 (~76.0%) 相比,连续模式MFC操作显示出增强的稳定性和更高的COD去除效率 (~85.3%).
结论:
- 加入CuO到活性炭阴极中协同增强ORR活性,并在没有膜的MFC中提供显著的生物污染抵抗力.
- 开发的CuO/AC阴极材料显示出稳定高效的废水处理与能量回收相结合的巨大前景.
- 连续模式运行有利于在废水处理的MFC应用中实现卓越的运行稳定性和效率.
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