双室微生物燃料电池用于偶氮染料降解及纺织废水发电

Julius Nnamdi Ndive , Simeon Okechukwu Eze , Somtochukwu Godfrey Nnabuife , Boyu Kuang , Zeeshan A. Rana
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摘要

纺织废水,特别是偶氮染料,由于其生物可降解性差和毒性,给环境带来了重大挑战。本研究探索了一种同时处理废水和发电的双室微生物燃料电池(MFC)。MFC由厌氧阳极室和好氧阴极室组成,由质子交换膜(PEM)隔开。阳极室中的电活性微生物代谢有机底物,包括偶氮染料污染物,将它们分解成更简单的副产物。在此过程中释放的电子流经外部电路产生电流,而质子则穿过PEM进入阴极室进行氧还原。从偶氮染料污染的土壤中分离到具有电化学活性的微生物,并通过实验验证了它们的降解能力。优化后的碳基电极和Nafion 117 PEM用于提高电导率和微生物活性。紫外可见光谱跟踪染料降解,活性黄染料在410 nm处的吸光度峰从2.9下降到0.4,表明偶氮键有效裂解。MFC分别实现了0.20 mV和0.16 mA的峰值电压和电流输出,展示了其双重功能。添加NaCl作为支撑电解质进一步提高了离子电导率和性能。本研究表明,MFC技术将微生物降解与生物发电相结合,是解决工业废水挑战的可持续解决方案。未来的工作应解决可扩展性,操作稳定性和先进的电极设计,以加强其实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Dual-Chamber microbial fuel cell for Azo-Dye degradation and electricity generation in Textile wastewater treatment

Dual-Chamber microbial fuel cell for Azo-Dye degradation and electricity generation in Textile wastewater treatment
Textile wastewater, particularly azo dyes, poses significant environmental challenges due to its poor biodegradability and toxicity. This study explores a dual-chamber microbial fuel cell (MFC) for simultaneous wastewater treatment and electricity generation. The MFC consists of an anaerobic anode chamber and an aerobic cathode chamber, separated by a proton exchange membrane (PEM). Electroactive microorganisms in the anode chamber metabolize organic substrates, including azo dye contaminants, breaking them down into simpler by-products. Electrons released during this process flow through an external circuit to generate current, while protons migrate across the PEM to the cathode chamber for oxygen reduction. Electrochemically active microbes were isolated from azo-dye-contaminated soil, and their degradation abilities validated through assays. Optimized carbon-based electrodes and a Nafion 117 PEM were used to enhance conductivity and microbial activity. UV–Vis spectroscopy tracked dye degradation, with the absorbance peak of reactive yellow dye at 410 nm decreasing from 2.9 to 0.4, indicating effective azo-bond cleavage. The MFC achieved peak voltage and current outputs of 0.20 mV and 0.16 mA, respectively, demonstrating its dual functionality. Adding NaCl as a supporting electrolyte further improved ionic conductivity and performance. This study demonstrates MFC technology as a sustainable solution for industrial wastewater challenges, integrating microbial degradation with bioelectricity generation. Future work should address scalability, operational stability, and advanced electrode designs to enhance its practical applications.
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