Degradation of Aspirin in a Microbial Fuel Cell Powered Electro-Fenton System Using an Etched Graphite Felt Cathode

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2023-12-28 DOI:10.1007/s12678-023-00861-8

Juliana John, Rinu Anna Koshy, Haribabu Krishnan, Aswathy Asok

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Abstract

Pharmaceutical wastewater containing contaminants like aspirin, ofloxacin, and amoxicillin are emerging as a worldwide issue due to its significant effects on the ecosystem and public health. In this study, wastewater containing aspirin was treated by using Mn₃O₄ etched graphite felt (EGF) as a cathode in an MFC-powered electro-Fenton system. The electrochemical characterization of etched electrodes revealed that etching at 400 °C for 1.5 h showed the highest electrochemical activity and rapid electron transfer with a peak current of − 0.058A. The physicochemical characterization exhibited a porous morphology with high defect concentration (I_D/I_G ratio of 1.56) and increased specific surface area and superhydrophilicity, proving its ability to regenerate Fe²⁺ on the cathodic surface and promote H₂O₂ generation. MFC exhibits a maximum power density of 0.053 W/m² and a current density of 0.516 A/\({{\text{m}}}^{2}\). Under optimized conditions of 0.7 mM iron concentration, pH 3, and 100 Ω resistance, the MFC-powered electro-Fenton system showed a maximum of 95.85% aspirin degradation in 30 h with a highest H₂O₂ generation of 11.84 mg/l. The results highlight the potential of EGF electrodes as efficient cathodes in MFC-powered electro-Fenton systems and suggest that this technology can be opted as an energy-saving system for degrading pharmaceuticals such as aspirin from wastewater.

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在使用蚀刻石墨毡阴极的微生物燃料电池驱动电-芬顿系统中降解阿司匹林

含有阿司匹林、氧氟沙星和阿莫西林等污染物的制药废水正在成为一个全球性问题，因为这些污染物对生态系统和公众健康有重大影响。在这项研究中，使用 Mn3O4 蚀刻石墨毡（EGF）作为 MFC 驱动的电-芬顿系统的阴极，对含有阿司匹林的废水进行了处理。蚀刻电极的电化学表征显示，在 400 °C 下蚀刻 1.5 小时显示出最高的电化学活性和快速的电子转移，峰值电流为 - 0.058A。理化特性分析表明，电极具有多孔形貌，缺陷浓度高（ID/IG 比为 1.56），比表面积增大，亲水性超强，证明其具有在阴极表面再生 Fe2+ 和促进 H2O2 生成的能力。MFC 的最大功率密度为 0.053 W/m2，电流密度为 0.516 A/\({{\text{m}}}^{2}\)。在铁浓度为 0.7 mM、pH 值为 3、电阻为 100 Ω 的优化条件下，MFC 供能的电-芬顿系统在 30 小时内降解了 95.85% 的阿司匹林，产生的 H2O2 最高达 11.84 mg/l。这些结果凸显了 EGF 电极作为 MFC 动力电-芬顿系统中高效阴极的潜力，并表明该技术可作为一种节能系统用于降解废水中的阿司匹林等药物。

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.