Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/86327
Título: | Optimization of iron-ZIF-8 catalysts for degradation of tartrazine in water by Fenton-like reaction |
Autor(es): | Assila, Ouissal Vilaça, Natália Bertão, Ana R. Fonseca, A. M. Parpot, Pier Soares, Olívia S. G. P. Pereira, Manuel F. R. Baltazar, Fátima Bañobre-López, Manuel Neves, Isabel C. |
Palavras-chave: | FeZIF-8 nanoparticles Pollutant effluents Fenton-like reaction Mineralization Germination rate |
Data: | Out-2023 |
Editora: | Elsevier 1 |
Revista: | Chemosphere |
Citação: | Assila, O., Vilaça, N., Bertão, A. R., Fonseca, A. M., Parpot, P., Soares, O. S. G. P., … Neves, I. C. (2023, October). Optimization of iron-ZIF-8 catalysts for degradation of tartrazine in water by Fenton-like reaction. Chemosphere. Elsevier BV. http://doi.org/10.1016/j.chemosphere.2023.139634 |
Resumo(s): | Optimization of iron zeolitic imidazole framework-8 (FeZIF-8) nanoparticles, as heterogeneous catalysts, were synthesized and evaluated by the Fenton-like reaction for to degrade tartrazine (Tar) in aqueous environment. To achieve this, ZIF-8 nanoparticles were modified with different iron species (Fe2+ or Fe3O4), and subsequently assessed through the Fenton-like oxidation. The effect of different parameters such as the concentration of hydrogen peroxide, the mass of catalyst and the contact time of reaction on the degradation of Tar by Fenton-like oxidation was studied by using the Box-Behnken design (BBD). The BBD model indicated that the optimum catalytic conditions for Fenton-like reaction with an initial pollutant concentration of 30ppm at pH 3.0 were T=40°C and 12mM of H2O2, 2g/L of catalyst and 4h of reaction. The maximum Tar conversion value achieved with the best catalyst, Fe1ZIF-8, was 66.5% with high mineralization (in terms of decrease of total organic carbon TOC), 44.2%. To assess phytotoxicity, the germination success of corn kernels was used as an indicator in the laboratory. The results show that the catalytic oxidation by Fenton-like reaction using heterogeneous iron ZIF-8 catalysts is a viable alternative for treating contaminated effluents with organic pollutants and highlighted the importance of the validation of the optimized experimental conditions by mathematical models. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/86327 |
DOI: | 10.1016/j.chemosphere.2023.139634 |
ISSN: | 0045-6535 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S004565352301901X |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series ICVS - Artigos em revistas internacionais / Papers in international journals CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_56361_1.pdf | 4,7 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons