A novel Electro-Fenton process characterized by aeration from inside a graphite felt electrode with enhanced generation of H2O2 and cycle of Fe3+/Fe2+ was proposed. The new type of Electro-Fenton process was used to degrade organic pollutants via graphite felt electrode aeration (GF-EA). The H2O2 concentration by GF-EA could reach 152-169 mg/L in a wide pH range (3-10), which was much higher than that achieved by graphite felt using solution aeration (GF-SA, 37-113 mg/L). For the degradation of nitrobenzene (NB), benzoic acid (BA), bisphenol A (BPA), and sulfamethoxazole (SMX) at pH 5.5, the percentage degradation by GF-EA could reach 55%, 56%, 80%, and 60% higher than those obtained by GF-SA, respectively. The solution TOC removal by GF-EA were enhanced by 29-51% relative to GF-SA. Mechanism analysis showed both OH and ferryl species were involved in the reaction system, and the amounts of OH and dissolved iron species in GF-EA group were 7.7 times and 4-8 times higher than those in GF-SA group, respectively. Besides, the mass transfer rate of GF-EA system was 5.4 times higher than that of GF-SA system. High amounts of H2O2, dissolved iron species and OH were attributed to the enhanced mass transfer of O2 and the solution.

中文翻译：

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一种新颖的电子芬顿工艺，其特征在于从石墨毡电极内部通气，增强了H2O2的电生成和Fe3 + / Fe2的循环。

提出了一种新颖的电子芬顿工艺，其特征是从石墨毡电极内部通气，增加了H2O2的生成和Fe3 + / Fe2 +的循环。新型的电子芬顿工艺用于通过石墨毡电极曝气（GF-EA）降解有机污染物。在较宽的pH范围（3-10）中，GF-EA的H2O2浓度可达到152-169 mg / L，远高于使用溶液曝气的石墨毡（GF-SA，37-113 mg / L） ）。对于在pH 5.5时硝基苯（NB），苯甲酸（BA），双酚A（BPA）和磺胺甲恶唑（SMX）的降解，GF-EA的降解百分比可分别达到55％，56％，80％和60分别比通过GF-SA获得的那些高％。相对于GF-SA，通过GF-EA去除溶液的TOC增强了29-51％。机理分析表明，反应体系中同时存在OH和亚铁基，GF-EA组的OH和铁离子含量分别比GF-SA组高7.7倍和4-8倍。此外，GF-EA系统的传质速率是GF-SA系统的5.4倍。大量的H2O2，溶解的铁和OH归因于O2和溶液的传质增强。