Performance evaluation of Iron-doped carbon cloth cathodes in bio-electrochemical system for dye degradation

IF 4.8 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Bioelectrochemistry Pub Date : 2025-05-09 DOI:10.1016/j.bioelechem.2025.109001

Juliana John, Haribabu Krishnan, Karnapa Ajit

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引用次数: 0

Abstract

Bio electro-Fenton (BEF) is an advanced bio-electrochemical system that utilizes the synergistic effect of microbial activity and electrochemical reactions to degrade organic pollutants in wastewater. This study investigates the degradation of Chrysoidine Y dye using iron-doped, binder-free carbon cloth cathodes in a BEF system. The cathodes exhibited significant electrochemical enhancements, including increased electrochemical active surface area, improved electrical conductivity, and efficient Fe³⁺/Fe²⁺ redox cycling. Under optimal conditions (1000 mg/L substrate concentration, pH 3, 750 Ω applied resistance and 20 ppm dye concentration), the BEF system achieved 73.14 % dye removal and 58.69 % total organic carbon (TOC) reduction within 10 h. Gas Chromatography-Mass Spectrometry (GC–MS) analysis revealed the breakdown of chrysoidine Y into non-toxic intermediates. Toxicity tests using chick pea germination showed no adverse effects (Germination Index>80 %) in the treated effluent. Whole genome sequencing of the anodic biofilm identified electrogenic bacteria responsible for electron generation to drive the fenton reaction. These findings highlight the potential of iron-doped cathodes in BEF systems for sustainable and efficient treatment of dye-contaminated wastewater, ensuring effective pollutant removal and environmental safety.

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掺杂铁炭布阴极在生物电化学系统中降解染料的性能评价

生物电fenton （bioelectro - fenton， BEF）是一种利用微生物活性和电化学反应协同作用来降解废水中有机污染物的先进生物电化学系统。本研究研究了在BEF系统中使用掺杂铁、无粘结剂的碳布阴极降解黄嘌啶Y染料。阴极表现出显著的电化学增强，包括电化学活性表面积增加，电导率提高，Fe3+/Fe2+有效的氧化还原循环。在最佳条件下（1000 mg/L底物浓度，pH值为3 750 Ω，应用电阻和20 ppm染料浓度），BEF系统在10小时内实现了73.14%的染料去除率和58.69%的总有机碳（TOC）减少。气相色谱-质谱（GC-MS）分析显示，chrysoidine Y分解为无毒中间体。用鹰嘴豆发芽进行的毒性试验表明，在处理过的废水中没有不良影响（发芽指数为80%）。阳极生物膜的全基因组测序鉴定出负责电子生成驱动芬顿反应的致电细菌。这些发现突出了铁掺杂阴极在BEF系统中可持续和有效处理染料污染废水的潜力，确保有效的污染物去除和环境安全。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioelectrochemistry 生物-电化学

CiteScore

9.10

自引率

6.00%

发文量

238

审稿时长

38 days

期刊介绍： An International Journal Devoted to Electrochemical Aspects of Biology and Biological Aspects of Electrochemistry Bioelectrochemistry is an international journal devoted to electrochemical principles in biology and biological aspects of electrochemistry. It publishes experimental and theoretical papers dealing with the electrochemical aspects of: • Electrified interfaces (electric double layers, adsorption, electron transfer, protein electrochemistry, basic principles of biosensors, biosensor interfaces and bio-nanosensor design and construction. • Electric and magnetic field effects (field-dependent processes, field interactions with molecules, intramolecular field effects, sensory systems for electric and magnetic fields, molecular and cellular mechanisms) • Bioenergetics and signal transduction (energy conversion, photosynthetic and visual membranes) • Biomembranes and model membranes (thermodynamics and mechanics, membrane transport, electroporation, fusion and insertion) • Electrochemical applications in medicine and biotechnology (drug delivery and gene transfer to cells and tissues, iontophoresis, skin electroporation, injury and repair). • Organization and use of arrays in-vitro and in-vivo, including as part of feedback control. • Electrochemical interrogation of biofilms as generated by microorganisms and tissue reaction associated with medical implants.