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arXiv · 2511.12843

Treatment of phenol wastewater by electro-Fenton oxidative degradation based on efficient iron-based-gas diffusion-photocatalysis

Zhang Junye·Zheng Hongyu·Cheng Jingran·Zhang Shengli
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Abstract

This study introduces a novel iron-based gas diffusion electrode-photocatalytic system aimed at enhancing the degradation of phenolic compounds in wastewater. Phenolic compounds are toxic environmental pollutants with significant resistance to biodegradation. The traditional methods for treating phenol wastewater, including biological treatments and adsorption techniques, often fall short in achieving complete mineralization. Our approach utilizes a dual-chamber electrochemical setup integrating stainless steel felt-2-EAQ gas diffusion electrodes with TiO2 photocatalysis. This combination significantly boosts hydroxyl radical production, critical for effective pollutant breakdown. Experimentally, the system achieved up to 92% degradation efficiency for phenol at an optimized operating current of 10 mA/cm^2 in 3 hours, surpassing traditional methods. Additionally, energy consumption was reduced by 40% compared to conventional electro-Fenton systems. The stability tests indicated that the electrodes maintain over 80% of their initial activity after five cycles of use. These findings suggest that our system offers a more sustainable and efficient solution for treating phenolic wastewater by enhancing both degradation rates and energy efficiency.

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Zhang Junye, Zheng Hongyu, Cheng Jingran, Zhang Shengli. 2025-11-17. Treatment of phenol wastewater by electro-Fenton oxidative degradation based on efficient iron-based-gas diffusion-photocatalysis. https://arxiv.org/abs/2511.12843

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