Imobilização de dióxido de titânio em malha de alumínio reciclado para a degradação de corante têxtil por Fotocatálise Heterogênea por Redes Neurais
DOI:
https://doi.org/10.5902/2236117037718Palavras-chave:
Malhas de alumínio, Processos oxidativos avançados, Remazol amarelo ouro, Fotocatálise, fitotoxicidadeResumo
Neste trabalho, redes de alumínio recicladas foram utilizadas como suporte de TiO2 para o tratamento do corante têxtil Remazol amarelo ouro (RGY 150). A imobilização de 100 mg de TiO2 foi realizada após calcinação do material de alumínio. Foram conduzidos em reator de bancada fotocatalítico testes preliminares, um experimento fatorial 23 com o melhor sistema e a cinética de degradação em sistemas com TiO2 suportado em rede de alumínio. Foram observados picos característicos de alumínio e TiO2 (anatase e rutilo) por DRX e a formação do filme catalítico foi verificada por
MEV. O sistema UV/H2O2/TiO2 apresentou maior eficiência, com 99% de degradação do corante em 50 minutos, seguido do sistema UV/H2O2/TiO2sp com 93% de degradação do corante. Enquanto o catalisador suportado apresenta vantagens de execução e altas taxas de degradação, o planejamento fatorial foi realizado para este sistema, apresentando melhor degradação (100% de degradação em 35 minutos). Foi obtido k = 0,114 min-1 e R² = 0,994 em um sistema de ajuste de modelos de pseudo-primeira ordem. O uso da rede neural artificial mostrou-se eficiente para predizer a degradação de um corante têxtil, com erro absoluto de 0,0181. Após o tratamento, houve uma diminuição da toxicidade do corante.
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