Publicação
Bimetallic-zeolite nanomaterials as catalysts for degradation of azorubine dye via Fenton-like oxidation
| Resumo: | Solutions containing equal concentrations of each metal ion pair (Zn/Fe, Co/Fe, Ni/Fe) were simultaneously added to the zeolite NaY using the ion-exchange method. The resulting bimetallic-zeolites were used as heterogeneous catalysts for the Fenton-like reaction for azorubine dye degradation. The optimization of the reaction parameters was assessed using the Box-Behnken design by studying the influence of H2O2 concentration, catalyst mass, and temperature. For each catalyst, the reaction kinetic was well fitted to the pseudo-first-order model. The best result was obtained with the (ZnFe) NaY catalyst obtaining 98 % of degradation within 60 min, with a rate constant of 0.0424 min1, followed by (CoFe)NaY and (NiFe)NaY, which achieved 89 % and 81 % of removal after 90 min, with rate constants of 0.0246 min1 and 0.0162 min1, respectively. Finally, the highest efficiency of (ZnFe)NaY opens up its applicability for large-scale wastewater treatment, using low-cost materials which further underscores its commercial potential. |
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| Autores principais: | Mrabet, Imane El |
| Outros Autores: | Santos, Bebiana L. C.; Tanji, Karim; Rombi, Elisabetta; Parpot, Pier; Fonseca, A. M.; Zaitan, Hicham; Neves, Isabel C. |
| Assunto: | Bimetallic-zeolite nanocatalysts Fenton-like oxidation Azorubine dye Response surface methodology |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Solutions containing equal concentrations of each metal ion pair (Zn/Fe, Co/Fe, Ni/Fe) were simultaneously added to the zeolite NaY using the ion-exchange method. The resulting bimetallic-zeolites were used as heterogeneous catalysts for the Fenton-like reaction for azorubine dye degradation. The optimization of the reaction parameters was assessed using the Box-Behnken design by studying the influence of H2O2 concentration, catalyst mass, and temperature. For each catalyst, the reaction kinetic was well fitted to the pseudo-first-order model. The best result was obtained with the (ZnFe) NaY catalyst obtaining 98 % of degradation within 60 min, with a rate constant of 0.0424 min1, followed by (CoFe)NaY and (NiFe)NaY, which achieved 89 % and 81 % of removal after 90 min, with rate constants of 0.0246 min1 and 0.0162 min1, respectively. Finally, the highest efficiency of (ZnFe)NaY opens up its applicability for large-scale wastewater treatment, using low-cost materials which further underscores its commercial potential. |
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