Abstract The work focuses on the bioelectrochemical treatment of wastewater containing phenol and trichlorophenol in microbial fuel cells (MFC) with non-coated and PANI/SnO2 modified anodes respectively. The SnO2 and PANI/SnO2 nanocomposite synthesised were characterised using XRD and FTIR techniques. The results reflected that the efficiency of the system performing oxic treatment was better than the system performing anoxic treatment. The anoxic treatment of mixed phenolic contaminant using non-coated and coated electrodes yielded the highest power densities of 375.36 and 454.81 mW/m2 respectively while the maximum power densities under oxic treatment were 464.81 and 522.77 mW/m2 respectively. The consistently higher performance of oxic MFCs in terms of power generation and treatment efficiencies infers its higher potential in treating toxic phenolic contaminants. UV/Vis spectrophotometry and cyclic voltammetry (CV) also confirm better oxic treatment. Moreover, the electrochemical impedance spectroscopy (EIS) data further justified the higher oxic performance with reduced charge transfer and ohmic resistances. The study advocates MFC as a practically feasible alternative in treating recalcitrant chemical wastes with lower energy requirements.

中文翻译：

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研究微生物燃料电池在好氧和缺氧环境下对混合酚类污染物的生物修复

摘要 工作重点分别采用无涂层和PANI/SnO2 改性阳极的微生物燃料电池(MFC) 生物电化学处理含苯酚和三氯苯酚废水。合成的 SnO2 和 PANI/SnO2 纳米复合材料使用 XRD 和 FTIR 技术进行表征。结果表明，进行好氧处理的系统的效率优于进行缺氧处理的系统。使用非涂层和涂层电极对混合酚类污染物进行缺氧处理的最高功率密度分别为 375.36 和 454.81 mW/m2，而在好氧处理下的最大功率密度分别为 464.81 和 522.77 mW/m2。含氧 MFC 在发电和处理效率方面始终如一的更高性能表明其在处理有毒酚类污染物方面具有更高的潜力。紫外/可见分光光度法和循环伏安法 (CV) 也证实了更好的好氧处理。此外，电化学阻抗谱 (EIS) 数据进一步证明了更高的氧化性能与降低的电荷转移和欧姆电阻。该研究主张将 MFC 作为一种实际可行的替代方法，用于处理能源需求较低的顽固化学废物。