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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2505.15678 |
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| _version_ | 1866915296530399232 |
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| author | Fernandes, Caio Machado Cerron-Calle, Gabriel A. Brillas, Enric Santos, Mauro C. Garcia-Segura, Sergi |
| author_facet | Fernandes, Caio Machado Cerron-Calle, Gabriel A. Brillas, Enric Santos, Mauro C. Garcia-Segura, Sergi |
| contents | The electro-Fenton (EF) process using a boron-doped diamond (BDD) anode and a carbon cloth air-diffusion cathode was optimized for efficient fipronil degradation. The system achieved high H2O2 electrogeneration with close to 80% current efficiency operating between 10 and 50 mA cm-2, with hydroxil radicals formed from BDD oxidation and Fenton's reaction that drive pollutant decay. Optimum conditions were found with 0.50 mM Fe2+ catalyst at pH = 3.0 and 30 mA cm-2, yielding almost complete removal for 20 mg L-1 fipronil in 60 min, 85% removal for 10 mg L-1, and a robust performance down to 1 mg L-1, thus reflecting real-world applicability. The system demonstrated excellent reusability and stability over seven consecutive runs. The evolution of final shot-chain linear carboxylic acids like acetic, fumaric, formic, oxalic, and oxamic, and inorganic ions like F-, Cl-, NH4+, was determined. This study highlights the EF process as a highly efficient, energy-balanced, and stable solution for fipronil degradation in water treatment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_15678 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optimization of fipronil removal via electro-Fenton using a carbon cloth air-diffusion electrode Fernandes, Caio Machado Cerron-Calle, Gabriel A. Brillas, Enric Santos, Mauro C. Garcia-Segura, Sergi Chemical Physics The electro-Fenton (EF) process using a boron-doped diamond (BDD) anode and a carbon cloth air-diffusion cathode was optimized for efficient fipronil degradation. The system achieved high H2O2 electrogeneration with close to 80% current efficiency operating between 10 and 50 mA cm-2, with hydroxil radicals formed from BDD oxidation and Fenton's reaction that drive pollutant decay. Optimum conditions were found with 0.50 mM Fe2+ catalyst at pH = 3.0 and 30 mA cm-2, yielding almost complete removal for 20 mg L-1 fipronil in 60 min, 85% removal for 10 mg L-1, and a robust performance down to 1 mg L-1, thus reflecting real-world applicability. The system demonstrated excellent reusability and stability over seven consecutive runs. The evolution of final shot-chain linear carboxylic acids like acetic, fumaric, formic, oxalic, and oxamic, and inorganic ions like F-, Cl-, NH4+, was determined. This study highlights the EF process as a highly efficient, energy-balanced, and stable solution for fipronil degradation in water treatment. |
| title | Optimization of fipronil removal via electro-Fenton using a carbon cloth air-diffusion electrode |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2505.15678 |