Harnessing nanomaterial-driven electron transfer for enhanced uranium recovery and toxicity mitigation in bioelectrochemical systems

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-06-01 DOI:10.1016/j.biortech.2025.132757

Meng Li , Leyi Chen , Kengqiang Zhong , Haowen He , Xing Chen , Xing Lu , Chengjun Guo , Luoyi Han , Ziyin Xia , Chenxi Li , Jingyi Wang , Wei Han , Lei Huang , Jia Yan , Bing-Jie Ni , Diyun Chen , Hongguo Zhang

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引用次数: 0

Abstract

Microbial electrolysis cells (MECs) face challenges in hexavalent uranium (U(VI)) remediation due to inefficient extracellular electron transfer (EET), slow biofilm formation, and uranium toxicity. This study developed a cobalt nanoparticles and nitrogen-co-doped carbon (CoNPs/NC) modified biocathode to address these limitations. Material characterization, electrochemical analysis, and density functional theory (DFT) calculations demonstrate that CoNPs/NC enhances biocathode conductivity and promotes EET efficiency while alleviating the toxic inhibition of uranium on microorganisms. The confinement effect facilitates electron delocalization, accelerating electron transfer to adsorbed uranyl ions (UO₂²⁺) and driving U(VI) to tetravalent uranium (U(IV)) reduction. By optimizing electrode-microbe interactions, CoNPs/NC improves biofilm stability and uranium recovery efficiency. This work provides a novel strategy to synchronize uranium detoxification with sustainable resource recovery in contaminated water systems through nanomaterial-driven electron transfer enhancement.

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利用纳米材料驱动的电子转移在生物电化学系统中提高铀的回收和毒性缓解

微生物电解细胞（MECs）由于细胞外电子转移（EET）效率低下、生物膜形成缓慢和铀毒性而面临六价铀（U(VI)）修复的挑战。本研究开发了一种钴纳米颗粒和氮共掺杂碳（CoNPs/NC）修饰的生物阴极来解决这些局限性。材料表征、电化学分析和密度泛函理论（DFT）计算表明，CoNPs/NC提高了生物阴极的导电性，提高了EET效率，同时减轻了铀对微生物的毒性抑制作用。约束效应有利于电子离域，加速电子向吸附的铀酰离子（UO22+）转移，驱动U（VI）还原为四价铀（U(IV)）。通过优化电极-微生物相互作用，CoNPs/NC提高了生物膜的稳定性和铀的回收效率。这项工作提供了一种通过纳米材料驱动的电子转移增强来同步铀解毒与污染水系统中可持续资源回收的新策略。

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

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.