Solar photocatalytic degradation of parabens using UiO-66-NH2

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

Manuel Peñas-Garzón (Autor) Outra; Maria José Sampaio (Autor) FEUP; Yilan L. Wang (Autor) Outra; Jorge Bedia (Autor) Outra; Juan J. Rodriguez (Autor) Outra; Carolina Belver (Autor) Outra; Cláudia Gomes da Silva (Autor) FEUP; Joaquim L. Faria (Autor) Outra

Revista

Título: Separation and Purification Technology

Vol. 286

Páginas: 1-12

ISSN: 1383-5866

Editora: Elsevier

Indexação

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Outras Informações

ID Authenticus: P-00W-F2Q

DOI: 10.1016/j.seppur.2022.120467

Abstract (EN): The photocatalytic degradation of methylparaben was investigated under simulated solar light using a synthesised metal-organic framework (UiO-66-NH2). For that purpose, the pollutant was spiked in different water matrices: distilled water, water from Lima River (Northwestern Portugal), and urban wastewater. Complete removal of the methylparaben in distilled water was achieved in 1 h reaction. In natural water matrices, the photocatalytic performance decreased to 70% removal after 3 h reaction, owing to the physical-chemical properties of the water samples. The UiO-66-NH2 photocatalyst revealed high stability under the continuous mode, reaching a steady state in 5 h, from which the removal percentage was kept constant for 25 h. The photocatalytic degradation of methylparaben gave five main reaction byproducts and four short-chain carboxylic acids, identified by LC/ESI-MS and UHPLC analyses, respectively. The mechanism of degradation was investigated by using selective scavengers. Photogenerated holes and superoxide radicals were found as the main species responsible for the degradation of methylparaben. The abatement of other parabens (as ethyl-and propylparaben) was also evaluated, being the conversion influenced by the length of the alkyl side chain. The results of this study give a comprehensive sight into the effective photocatalytic remediation of parabens using UiO-66-NH2.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12