Sulfamethoxazole mineralization by solar photo electro-Fenton process in a pilot plant
| Autor: | Laura Hinojosa-Reyes, E. Ruiz-Ruiz, Jorge Luis Guzmán-Mar, Fiderman Machuca-Martínez, J.C. Murillo-Sierra, Aracely Hernández-Ramírez |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Anodic oxidation 02 engineering and technology General Chemistry Mineralization (soil science) 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Volumetric flow rate Pilot plant Scientific method Response surface methodology 0210 nano-technology Inorganic nitrogen 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Catalysis Today. 313:175-181 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2017.11.003 |
| Popis: | The sulfamethoxazole (SMX) mineralization through the solar photo electro-Fenton (SPEF) process in a pilot plant containing 20 L of 50 mg L−1 SMX solution was investigated. The process was carried out at pH 3 under different operational conditions varying temperature, volumetric flow and applied current density. Box-Behnken experimental design and response surface methodology (RSM) were used to optimize the experimental variables of the SPEF process. Under the optimal conditions, the SPEF was compared with electro-Fenton (EF) and anodic oxidation (AO- H2O2) processes. Under optimum design variables of 47 mA cm−2, 45 °C and 571 L h−1, SPEF was more efficient yielding 90% of TOC removal after 360 min of reaction with a maximum of 83% of mineralization current efficiency (MCE). The main by-products detected on the final solution treated by SPEF were oxalic, maleic, oxamic and fumaric acids, while NH4+ and NO3− were the main inorganic nitrogen ions released during the process. |
| Databáze: | OpenAIRE |
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