Photodegradation of Rhodamine B catalyzed by ZnO pellets

Reference	Presenter	Authors (Institution)	Abstract
06-078	Thamara Machado Oliveira Ruellas	Ruellas, T.M.(Universidade Federal de Alfenas); Domingos, G.H.(Universidade Federal de Alfenas); Peçanha, L.O.(Universidade Federal de Alfenas); Maestrelli, S.C.(Universidade Federal de Alfenas); Giraldi, T.R.(Universidade Federal de Alfenas);	Nowadays, society faces several environmental problems, which are target areas of global concern, especially in the scientific community. Among these problems is the high and constant worldwide use of dye. Many recent studies have focused on the treatment of dye effluents, since efficient methods for this purpose have not yet been consolidated. In that regard, the present work studied the degradation of Rhodamine B through photocatalytic treatment, one of the Advanced Oxidation Processes. Photocatalysis is a process that uses semiconductors in the presence of radiation to generate highly reactive free radicals. Such radicals react with the pollutant and enable the conversion of organic contaminants into carbon dioxide, water and inorganic ions. Therefore, as previously mentioned, it is necessary to use a semiconductor activated by radiation. The present study sought to obtain immobilized ZnO semiconductors, in other words, ceramic pellets thick enough to maintain their structures, by slip casting. The aim was to make these pellets reusable photocatalysts. The reusability of the photocatalysts was evaluated and the pieces were successfully used in several degradation cycles.
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