Fotocatálise heterogênea no polimento de efluentes sintéticos de curtume: alternativa para minimizar impactos ambientais

• Ano de defesa: 2006
• Autor(a) principal: Pascoal, Salomão de Andrade
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraí­ba; BR; Gerenciamento Ambiental; Programa de Pós Graduação em Desenvolvimento e Meio Ambiente; UFPB
• Palavras-chave em Português: Fotocatálise Heterogênea; Indústria de Curtume; Cr(VI); Matéria Orgânica; Heterogeneous Photocatalysis; Tannery Industry; Organic Matter; CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/4559

The industry is a section of the contemporary society with great pollutant potential of the environment, especially of the aquatic ecosystems. The tanning industries are big producing of dejections with significant amounts of organic matter and of chrome. The conventional processes of treatment applied those dejections, not always they possess good effectiveness. Actuality, the Advanced Oxidation Processes represent an excellent alternative of tertiary treatment. In the present study, the application of the heterogeneous photocatalysis was evaluated, being used a photocatalyst (TiO2) immobilized, in the tertiary treatment of synthetic liquid effluents representative of tanning industries. It was aimed at to remove Cr(VI) and organic matter. The photocatalytic reactor was of the type Fixed Bed of Fine Film, built with a plate of glass arrayed for the fixation of TiO2. It was adopted as radiation sources, the sun and lamps issuing of UV radiation (λ= 250 nm). The smallest values of removal effectiveness for Cr(VI) they were of 62% and 51% and of DOC they were from 60% and 53% to the experiments done with radiation UV originating from of the sun and of lamps, respectively. The results of the parameters related to the reduction phases and oxidation of the heterogeneous photocatalysis, they showed that the exhibition in the sun, he/she has effectiveness of larger relative removal than the exhibition to UV lamps. The data of relative removal of Cr(VI) and of DOC and the constants kinetics of these parameters, they indicated that the adopted experimental configurations optimized the phase of reduction of the heterogeneous photocatalysis.