Decolorization and power generation in a microbial fuel cell with pomelo peel-derived bioanode

IF 6.7 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-07-16 DOI:10.1016/j.jwpe.2025.108324

Mingshuo Feng , Haiman Wang , Da Li , Yeting Zhang

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Abstract

Dye wastewater poses significant environmental risks, and while microbial fuel cells (MFCs) demonstrate excellent decolorization efficiency in treating such wastewater, developing a high-performance anode remains crucial for enhancing MFC performance.

This study developed a bioanode—polypyrrole-pomelo peel carbon-carbon cloth (PPy-PPC-CC)—via a facile calcination-carbonization and electrochemical polymerization approach using pomelo peel as biomass material.

Physicochemical and electrochemical characterizations revealed that the modified PPy-PPC-CC anode exhibited an enlarged specific surface area with elevated pyrrolic-N content (66.3 ± 1.2 %) and total nitrogen (13.11 %), thereby synergistically enhancing extracellular electron transfer (EET) efficiency. In addition, the MFC equipped with the PPy-PPC-CC bioanode achieved a decolorization efficiency of 94.23 ± 2.12 % at 72 h for methyl orange treatment while achieving a maximum power density of 370 ± 5.3 mW/m². The liquid chromatography coupled with mass spectrometry (LC-MS) analysis revealed two degradation pathways of methyl orange: demethylation and benzene ring hydroxylation. Possible degradation pathways were further proposed based on the identified intermediates. Finally, microbial analysis revealed enriched electroactive genera (Geobacter, Acinetobacter, Enterobacter), optimizing and improving the structure of the anode biofilm community.

The results demonstrate that the MFC equipped with the PPy-PPC-CC bioanode exhibits excellent electrochemical performance, good biocompatibility, and remarkable methyl orange decolorization efficiency.

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柚皮生物阳极微生物燃料电池的脱色及发电

染料废水具有重大的环境风险，虽然微生物燃料电池（MFC）在处理此类废水时表现出出色的脱色效率，但开发高性能阳极仍然是提高MFC性能的关键。本研究以柚子皮为生物质材料，通过易烧-碳化和电化学聚合的方法，开发了生物阳极-聚吡咯-柚子皮碳-碳布（PPy-PPC-CC）。理化和电化学表征表明，改性后的PPy-PPC-CC阳极比表面积增大，吡咯- n含量（66.3±1.2 %）和总氮含量（13.11%）均有所提高，从而协同提高了细胞外电子转移（EET）效率。此外，配备PPy-PPC-CC生物阳极的MFC在处理甲基橙72 h时的脱色效率为94.23±2.12%，最大功率密度为370±5.3 mW/m2。液相色谱-质谱（LC-MS）分析发现甲基橙有两种降解途径：去甲基化和苯环羟基化。根据鉴定的中间体进一步提出了可能的降解途径。最后，微生物学分析发现了富电活性菌（Geobacter、Acinetobacter、Enterobacter），优化和改善了阳极生物膜群落结构。结果表明，配备PPy-PPC-CC生物阳极的MFC具有优异的电化学性能、良好的生物相容性和显著的甲基橙脱色效果。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies