The combination of microbial fuel cell with electrokinetic processes, known as Microbial Electrokinetic Cell (MEKC), is an innovative and sustainable process for simultaneous sediment remediation and renewable energy production. This study made a major contribution to research on MEKC by demonstrating the maximum energy extraction and chromium removal using three types of the anode electrode, comprising plate graphite (PG), scratched plate graphite (SPG), and the combination of SPG with granular activated carbon (SPG‐GAC) used as bioanode. The results indicated that power generation changed noticeably based on the anolyte type and electrode configuration. The application of the SPG‐GAC electrode resulted in the maximum power densities of 10 ± 0.02 and 5.12 ± 0.04 W/m³ in MEKCs fed by actual and synthetic wastewater, respectively. However, feeding MEKC with synthetic wastewater instead of the actual one caused a slight reduction in chromium removal from 72.64 to 69.50% in anode and from 53.70 to 49.44% in cathode chamber. According to the obtained results, the SPG‐GAC can be suggested to improve MEKC power generation by increasing bacterial adhesion and enhancing the extracellular electron transfer using the granular activated carbon. Furthermore, the results provided a proof‐of‐concept that MEKC has a high potential to be used for efficient sediment remediation and to promote environmental health.

中文翻译：

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微生物燃料电池增强的电动过程，用于修复海洋沉积物中的铬

微生物燃料电池与电动过程的结合，称为微生物电动细胞（MEKC），是一种创新且可持续的过程，可同时进行沉积物修复和可再生能源的生产。这项研究对MEKC的研究做出了重大贡献，展示了使用三种类型的阳极电极（其中包括板状石墨（PG），刮板状石墨（SPG）以及SPG与颗粒状活性炭的结合）展示的最大能量提取和铬去除。 （SPG-GAC）用作生物阳极。结果表明，基于阳极电解液的类型和电极结构，发电量发生了显着变化。SPG-GAC电极的应用导致最大功率密度为10±0.02和5.12±0.04 W / m ³分别由实际和合成废水供入的MEKC中。但是，用合成废水而不是实际废水供入MEKC会导致阳极的铬去除率从72.64轻微降低到69.50％，阴极室的铬去除率从53.70降低到49.44％。根据获得的结果，建议使用SPG-GAC通过增加细菌粘附力和使用颗粒状活性炭增强细胞外电子传递来改善MEKC发电。此外，结果提供了概念证明，证明MEKC具有用于有效修复沉积物和促进环境健康的巨大潜力。