| Titre : | Etude de la dégradation photocatalytique de pesticide à l'aide de nanostructures d'oxydes mixtes (ZnO, TiO2) |
| Auteurs : | Maroua AGHAMIR, Auteur ; Meriem OUARDI, Auteur ; Y. AIMER, Directeur de thèse |
| Type de document : | texte imprimé |
| Editeur : | 3- [S.l.] : Université Docteur Moulay Taher Saida, 2021/2022 |
| Format : | 65 p |
| Accompagnement : | CD |
| Langues: | Français |
| Catégories : | |
| Mots-clés: | Photocatalysis ; Pesticide ; Agricultural Pollution ; Mixed Oxide. |
| Résumé : |
The use of pesticides in agriculture is on the rise as well as the risk of pollution in the
different spheres (water, air and soil) and what aggravates their impact is the fact that they are, for the most part, organic -recalcitrant. For this, we use so-called advanced oxidation “AOP’s” processes, which are based on the generation of hydroxyl radicals with a high oxidation potential in order to eliminate these dangerous substances. In this work, a study of the degradation of a pesticide, the TECTO 500 SC whose active molecule is Thiabendazole is a fungicide widely used in the production of fruits such as citrus fruits and apples, by photocatalysis which is carried out at the using a photo-reactor using the doping and nanostructures of different catalysts such as TiO2 and ZnO and measuring the disappearance of the active molecule using a UV/Vis spectrophotometer as well as global parameters concerning the organic charge. Several molar ratios are used (ZnO: TiO2) = (9:1, 3:1 and 1:1), calcined at different temperatures (400 and 600°C), the Thiabendazole is totally eliminated contrary to the use of the two catalysts separately, which confirmed to us that the doping of these two catalysts increased the catalytic power of the process, and the kinetic study showed that this degradation follows a pseudo first-order model. |
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Etude de la dégradation photocatalytique de pesticide à l'aide de nanostructures d'oxydes mixtes (ZnO, TiO2) Adobe Acrobat PDF |
