Fenton-and Photo-Fenton-Like Degradation of a Textile Dye by Heterogeneous Processes with Fe/ZSM-5 Zeolite

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Filipa Duarte (Autor) FEUP; Luis M. Madeira (Autor) FEUP

Revista

Título: Separation Science and Technology

Vol. 45 Nº 11

Páginas: 1512-1520

ISSN: 0149-6395

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 22 Citações

ISI Web of Science

Scopus - 30 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

CORDIS: Ciências Tecnológicas > Engenharia

Outras Informações

ID Authenticus: P-003-CR2

DOI: 10.1080/01496395.2010.487452

Abstract (EN): This work deals with the non-biodegradable azo-dye Orange II degradation by the heterogeneous Fenton-like and photo-Fenton-like processes using Fe/ZSM-5 zeolite as catalyst. The influence of some relevant parameters was studied, namely pH and temperature in the ranges 3.0-8.5 and 30-53 degrees C, respectively. The decolorization degree, the total organic carbon (TOC) removal, and the leaching level were evaluated along time in a slurry batch reactor. It was noticed that the degradation rate increased with temperature while leaching decreased when the initial pH value is more basic. It was possible to decolorize OII under less acidic conditions than those conventionally performed in Fenton's oxidation, compensating this with a slight increase of temperature, which is a promising approach since textile effluents are characterized by high temperatures and pH values. The results were significantly improved in the presence of UV/VIS radiation, with ca. 90% of TOC removal (for reaction times >= 10 h, depending on the other conditions). Besides, the photo-Fenton process exhibited also a lower dependence on reaction pH as compared to the Fenton's one and provided negligible Fe leaching from the zeolite support.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9