PHOTOCHEMICAL TREATMENT OF PHYTOSANITARY EFFLUENTS FROM THE SPRAYERS RINSE: CASE OF SIMAZINE
Journal Title: Larhyss Journal - Year 2017, Vol 30, Issue 30
Abstract
The degradation of simazine in the process of photolysis has been studied in aqueous solution. The study of the photolysis concerned three aspects namely the direct photolysis, photolysis catalyzed first using TiO2 and the coupling TiO2/H2O2 as catalysts. Photolysis experiments were carried out under different lamps ʎ = 253.7 nm and ʎ ≥ 285nm. Experiences catalyzed photolysis were performed ʎ ≥ 285 nm. The study showed that the degradation of simazine by direct photolysis is possible both with monochromatic light (254 nm) with a polychromatic light (λ≥ 285 nm). Photolysis is higher under monochromatic light (λ 254 nm).The experiments also showed that simazine degrades by photolysis catalyzed. The addition of hydrogen peroxide (H2O2) greatly accelerated the degradation of simazine in the catalyzed compared photolysis. In all these studies, it appears that the reaction rate of degradation in the presence of TiO2 and couple (TiO2/H2O2) is much higher than the direct photolysis of simazine.
Authors and Affiliations
DIARRA M. | UFR Environnement, Université Jean Lorougnon GUEDE BP 150 Daloa, Côte d’Ivoire, KOUADIO D. L. | UFR Environnement, Université Jean Lorougnon GUEDE BP 150 Daloa, Côte d’Ivoire, SORO D. B. | Laboratoire des Sciences de l’Environnement, UFR Sciences et Gestion de l’Environnement, Université Nangui Abrogoua 08 BP 801 Abidjan 08. Côte d’Ivoire, ABOUA K. N. | Laboratoire des Sciences de l’Environnement, UFR Sciences et Gestion de l’Environnement, Université Nangui Abrogoua 08 BP 801 Abidjan 08. Côte d’Ivoire, MEITE L. | Laboratoire des Sciences de l’Environnement, UFR Sciences et Gestion de l’Environnement, Université Nangui Abrogoua 08 BP 801 Abidjan 08. Côte d’Ivoire, MAMADOU K. | Laboratoire des Sciences de l’Environnement, UFR Sciences et Gestion de l’Environnement, Université Nangui Abrogoua 08 BP 801 Abidjan 08. Côte d’Ivoire, TRAORE K. S. | Laboratoire des Sciences de l’Environnement, UFR Sciences et Gestion de l’Environnement, Université Nangui Abrogoua 08 BP 801 Abidjan 08. Côte d’Ivoire, DEMBELE A. | Laboratoire Central d’Agronomie et d’Écotoxicologie (LCAE) LANADA 04 BP 612 Abidjan 04, Côte d’Ivoire
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