Biometric relationships and condition factor of Nile tilapia (Oreochromis niloticus) grown in concrete ponds with groundwater
[EN] Atenolol (ATN), prednisone (PRED), and sulfamethoxazole (SMX) are widely used pharmaceuticals that persist in aquatic environments, posing risks to non-target organisms due to their individual and potentially synergistic toxic effects. This study investigates the degradation of these contaminan...
| Autores: | , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/230330 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/230330 |
| Access Level: | acceso abierto |
| Palavra-chave: | Oreochromis niloticus Gray tilapia Biometry Length-weight Fulton s condition factor Tilapia culture |
| Resumo: | [EN] Atenolol (ATN), prednisone (PRED), and sulfamethoxazole (SMX) are widely used pharmaceuticals that persist in aquatic environments, posing risks to non-target organisms due to their individual and potentially synergistic toxic effects. This study investigates the degradation of these contaminants using electrochemical H₂O₂ generation (E-H₂O₂), applied alone and in combination with UV-C irradiation, with the aim of advancing water treatment technologies. The system employed an electrochemical reactor with a gas diffusion electrode (GDE) as the cathode and a cation-exchange membrane to prevent H₂O₂ oxidation at the anode. A solid electrolyte was used for proton conduction to enhance practicality and reduce chemical inputs, and ionic adsorption capabilities were demonstrated, promoting electrostatic interactions with the PhACs. At an optimized current density of 30 mA cm⁻², contaminant degradation was evaluated under UV-C, E-H₂O₂, and the combined E-H₂O₂/UV-C process. The E-H₂O₂/UV-C system achieved the highest degradation efficiency, attaining extensive removal of the contaminants within 15 min, breaking them down into simpler carboxylic acids and showing no phytotoxicity in Allium cepa bioassays. However, GDE characterization revealed morphological changes and catalyst loss after extended use, potentially affecting the stability and efficiency of H₂O₂ generation. These findings indicate that the E-H₂O₂/UV-C system holds strong potential for water treatment applications targeting multi-contaminant degradation, while underscoring the need to develop more durable cathode materials to ensure sustained performance under prolonged operational conditions. |
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