N-acyl homoserine lactones - Modified anode improves carbamazepine removal in microbial fuel cells: Effect of electrogenic biofilm

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-03-17 DOI:10.1016/j.jwpe.2025.107489

Jing Fu , Xiang Li , Hao Chen , Jingting Mei , Liang Tang

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引用次数: 0

Abstract

Carbamazepine (CBZ) often contaminates wastewater, posing ecological risks. Graphene-based anode-augmented microbial fuel cells (MFCs) efficiently degrade resistant organics and convert waste energy to electricity. Conventional graphene oxide hydrogels employed as anodes encounter challenges related to complex fabrication processing and biocompatibility. This study achieved a one-step synthesis method for bio-reduced graphene oxide hydrogel (BGH) and introduced quorum sensing (QS) molecule to improve graphene reduction for optimal practical applications. A BGH anode with N-butyryl-L-Homoserine lactone (C4-HSL) was developed to assess its performance and mechanisms for CBZ removal in MFC applications. The outcomes showed that the QS molecule C4-HSL enhanced CBZ removal and increased maximum power density to 85 % and 89.38 W m⁻³, respectively. This improvement can be attributed to the enhanced degree of reduction and defect sites for electroactive microorganism attachment.

Additionally, C4-HSL facilitates biofilm formation, extracellular polymeric substance content, and the abundance of electroactive genera of Bacillus, Brooklawnia, Bacteroides, and Clostridium. The influence of C4-HSL on MFC performance varies with concentration, as biofilms that exceed moderate thickness can restrict electron transfer. The finding demonstrated that C4-HSL-modified materials may serve as effective anodes. By adjusting HSL concentrations according to MFC application goals, these anodes can enhance contaminant remediation and energy generation efficiency.

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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