Efficient Mineralization of Sulfamethoxazole by a Tandem Dual-System Electro-Fenton Process Using a Gas Diffusion Electrode for H2o2 Generation and an Activated Carbon Fiber Cathode for Fe2+ Regeneration DOI

Songyu Ren,

Yanyu Zhang, Aimin Wang

et al.

Published: Jan. 1, 2024

Both H2O2 generation and Fe3+/Fe2+ cycle play significant roles in electro-Fenton (EF) that produces hydroxyl radicals (•OH) to degrade refractory organic pollutants. Nevertheless, it is typically difficult achieve simultaneously due the electron transfer selectivity of cathode material. To address this challenge, herein, a novel tandem dual-system EF process was developed realize efficient mineralization sulfamethoxazole (SMX), which gas diffusion electrode (GDE) used mainly for accumulation (GDE-EF), while an activated carbon fiber (ACF) applied primarily Fe2+ regeneration (ACF-EF). by GDE about 22 times higher than ACF cathode. The significantly accelerated conversion Fe3+ Fe2+, i.e., 17.0 mg L-1 (30.6%) maintained at 120 min ACF-EF, much 3.4 GDE-EF (6.1%). Up 87.6% achieved after 360 GDE+ACF-EF treatment. Effects concentration, current density, pH, SMX concentration on pollutant removal were investigated. Evolutions inorganic ions short-chain carboxylic acids determined. Seven aromatic intermediates identified UPLC-QTOF-MS, their ecotoxicity also assessed. Finally, reaction sequence proposed.

Language: Английский

Construction of a novel dual-cathode flow-through heterogeneous electro-Fenton system for enhanced mass transfer during H2O2 production and activation in cefoperazone degradation DOI

Chaoran Shao,

Songyu Ren,

Yanyu Zhang

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132235 - 132235

Published: Feb. 1, 2025

Language: Английский

Citations

1
New insights into synergistic mechanism of H2O2 generation and Fe3+/Fe2+ cycle by the activated carbon fiber felt cathode in the electro-Fenton process for enrofloxacin degradation DOI
Ying Liu,

Songyu Ren,

Yanyu Zhang

et al.

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 71, P. 107382 - 107382

Published: March 1, 2025

Language: Английский

Citations

1
Efficient mineralization of sulfamethoxazole by a tandem dual-system electro-Fenton process using a gas diffusion electrode for H2O2 generation and an activated carbon fiber cathode for Fe2+ regeneration DOI

Songyu Ren,

Yanyu Zhang, Aimin Wang

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 129108 - 129108

Published: Aug. 6, 2024

Language: Английский

Citations

4
Efficient Mineralization of Sulfamethoxazole by a Tandem Dual-System Electro-Fenton Process Using a Gas Diffusion Electrode for H2o2 Generation and an Activated Carbon Fiber Cathode for Fe2+ Regeneration DOI

Songyu Ren,

Yanyu Zhang, Aimin Wang

et al.

Published: Jan. 1, 2024

Both H2O2 generation and Fe3+/Fe2+ cycle play significant roles in electro-Fenton (EF) that produces hydroxyl radicals (•OH) to degrade refractory organic pollutants. Nevertheless, it is typically difficult achieve simultaneously due the electron transfer selectivity of cathode material. To address this challenge, herein, a novel tandem dual-system EF process was developed realize efficient mineralization sulfamethoxazole (SMX), which gas diffusion electrode (GDE) used mainly for accumulation (GDE-EF), while an activated carbon fiber (ACF) applied primarily Fe2+ regeneration (ACF-EF). by GDE about 22 times higher than ACF cathode. The significantly accelerated conversion Fe3+ Fe2+, i.e., 17.0 mg L-1 (30.6%) maintained at 120 min ACF-EF, much 3.4 GDE-EF (6.1%). Up 87.6% achieved after 360 GDE+ACF-EF treatment. Effects concentration, current density, pH, SMX concentration on pollutant removal were investigated. Evolutions inorganic ions short-chain carboxylic acids determined. Seven aromatic intermediates identified UPLC-QTOF-MS, their ecotoxicity also assessed. Finally, reaction sequence proposed.

Language: Английский

Citations

0