Dégradation des pesticides chlortoluron, carbofurane et bentazone en milieux aqueux par les procédés d'oxydation avancée

作者: Aida Kesraoui-Abdessalem

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摘要: L'utilisation du procede d'oxydation avancee electrochimique est un moyen simple et economique d'obtention des radicaux hydroxyles (OH*) fortement oxydants. Au cours de ce travail les ont ete utilises pour la degradation chlortoluron, carbofurane bentazone en solution aqueuse. La methodologie recherche experimentale a utilisee etudier l'influence quelques parametres (concentration l'intensite courant duree traitement, etc.) sur vitesse determiner conditions optimale mineralisation. L'evolution concentration pesticides fonction temps traitement montre une cinetique pseudo-premier ordre (kabs = 4,92 × 109, 3.24 109 2.63 mol-1.L.s-1 respectivement le bentazone). Dans nos experimentales optimales (I 300 mA, [pesticide]0 0,125 10-3 mol.L-1 t 8 h), nous obtenons taux mineralisation superieur 90% trois pesticides. cas molecules etudiees, il que par photo-Fenton (UV/Fe3+/H2O2) doses reactifs initiale traiter. Une comparaison performances differents procedes etudies (electro-Fenton (BDD), electro-Fenton (PT), oxydation anodique photo-Fenton) (BDD) permettent d'atteindre tres important (≈ au bout 2 h). cout coute beaucoup plus chere (BDD). Le plasma d'air humide utilise chlortoluron. Differents catalyseurs (Fe2+, Fe3+ TiO2) ameliorer glidarc. combinaison entre TiO2 Fe2+ permet d'aboutir 96%de chlortoluron 3 h.

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