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- W2591953601 abstract "Degradation tests were carried out to determine the luminous intensity influence on textile industry effluent photodegradation. TiO 2, Nb 2O5, Nb 2O5-TiO 2 and Nb 2O5/TiO 2 were used as photocatalysts. FTIR (Fourrier Transform Infrared) and TPR (Temperature Program Reduction) results showed interaction between different forms of the oxides in the Nb 2O5-TiO 2 and Nb 2O5/TiO 2 catalysts and the forming of a new phase in Nb 2O5-TiO 2. The reaction rate was significantly influenced by the luminous intensity. Luminous intensity decrease caused decolourisation increase and COD reduction decrease, suggesting that the concentration of the hydroxyl groups, which are responsible for the chromophores groups degradation, is proportional to the luminous intensity. RESUMO. Influencia da intensidade luminosa na fotodegradacao de efluente textil. Testes de degradacao foram realizados com o objetivo de determinar a influencia da intensidade luminosa na fotodegradacao de um efluente industrial textil. Como fotocatalisadores foram utilizados TiO 2, Nb 2O5, Nb 2O5-TiO 2 e Nb 2O5/TiO 2. Os resultados de FTIR (Infravermelho com Transformada de Fourrier)e RTP (Reducao a Temperatura programada) mostraram a existencia de interacao entre os oxidos de forma diferenciada nos catalisadores Nb 2 O 5 -TiO 2 e Nb 2 O 5 /TiO 2 e a formacao de uma nova fase no Nb 2 O 5 -TiO 2 . A taxa de reacao foi significativamente influenciada pela intensidade luminosa. A reducao da intensidade luminosa ocasionou o aumento da descoloracao e a diminuicao da reducao de DQO, sugerindo que a concentracao dos grupos hidroxila, que sao responsaveis pela degradacao dos grupos cromoforos, e proporcional a intensidade luminosa. Palavras-chave: fotodegradacao, intensidade luminosa, TiO 2, Nb 2O5, efluente textil." @default.
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- W2591953601 date "2005-01-01" @default.
- W2591953601 modified "2023-09-27" @default.
- W2591953601 title "Influence of luminous intensity on textile effluent photodegradation Influence of luminous intensity on textile effluent photodegradation Influence of luminous intensity on textile effluent photodegradation Influence of luminous intensity on textile effluent photodegradation" @default.
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