Boron transport and remediation performance in sediment microbial fuel cells via electromigration and synergistic ecosystem interactions

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2026-05-01 Epub Date: 2026-02-14 DOI:10.1016/j.electacta.2026.148452

Anıl Yakar , Onur Can Türker , Nuray Yilmaz Baran , Talat Baran

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Abstract

Boron contamination in aquatic sediments poses severe ecological risks, necessitating remediation strategies that are both sustainable and energy-efficient. This study developed an integrated sediment microbial fuel cell (SMFC) system coupled with Lemna gibba and magnetic chitosan-EDTA (Ch-Mag-Ed) composite beads to enhance boron removal via electromigration, plant uptake, and specific adsorption. The hybrid system demonstrated superior performance, achieving a maximum power density of 3.72 mW m⁻², a boron removal efficiency of 44.9 % from the sediment, and a chemical oxygen demand (COD) removal of 81.4 %. Electromigration was identified as the primary driving force transporting boron from the sediment to the overlying water, where it was effectively removed by the floating cathode components. The Ch-Mag-Ed beads served a critical dual function: acting as a chemical buffer to rapidly adsorb migrating boron and mitigating phytotoxicity, which significantly improved the relative growth rate of L. gibba. Furthermore, the system successfully reduced the sediment Geo-accumulation Index (Igeo) from heavily to moderately contaminated levels. This synergistic approach confirms that coupling bio-electrochemical systems with adsorption-assisted rhizofiltration provides a robust, energy-positive solution for remediating metalloid-contaminated sediments

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硼在沉积物微生物燃料电池中通过电迁移和协同生态系统相互作用的转运和修复性能

水生沉积物中的硼污染具有严重的生态风险，需要可持续和节能的修复策略。本研究开发了一种集成的沉积物微生物燃料电池（SMFC）系统，该系统结合了Lemna gibba和磁性壳聚糖- edta （Ch-Mag-Ed）复合微珠，通过电迁移、植物吸收和特定吸附来增强硼的去除。该混合系统表现出优异的性能，最大功率密度为3.72 mW m - 2，对沉积物的硼去除效率为44.9%，对化学需氧量（COD）的去除率为81.4%。电迁移被认为是将硼从沉积物输送到上覆水体的主要驱动力，在那里硼被漂浮的阴极组分有效地去除。Ch-Mag-Ed微珠具有快速吸附迁移硼和减轻植物毒性的双重作用，显著提高了长毛藓的相对生长速度。此外，该系统成功地将沉积物地质堆积指数（Igeo）从重度污染水平降低到中度污染水平。这种协同方法证实，耦合生物电化学系统与吸附辅助根茎过滤为修复金属污染的沉积物提供了一种强大的、能量正的解决方案

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.