Modelling of the synthetic dye Orange II degradation using Fenton's reagent: From batch to continuous reactor operation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

ramirez, jh (Autor) Outra; duarte, fm (Autor) Outra; martins, fg (Autor) FEUP; costa, ca (Autor) FEUP; madeira, lm (Autor) FEUP

Revista

Título: Chemical Engineering Journal

Vol. 148

Páginas: 394-404

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Web of Knowledge - 99 Citações

ISI Web of Science

Scopus - 118 Citações

COMPENDEX

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

CORDIS: Ciências Tecnológicas ; Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

ID Authenticus: P-003-K3A

DOI: 10.1016/j.cej.2008.09.012

Abstract (EN): In this work, a simple kinetic model was used to study the azo dye Orange II (O-II) degradation using Fenton's reagent, in the Fenton-like stage. The effects of pH, temperature. Cl(-) concentration and initial concentrations of O-II, hydrogen peroxide (H(2)O(2)) and ferrous ion catalyst (Fe(2+)) on the degradation rate have been investigated in a batch reactor. The apparent kinetic constants, k(ap), for O-II degradation were determined in the following ranges of experimental conditions: 2.0 <= pH <= 4.0, 283 K <= T <= 323 K, 0M <= C(cl)- <= 1 x 10(-2) M, 3 x 10(-5) M <= C(Ollo) <= 1 x 10(-4) M, 1 x 10(-4) M <= C(H2O2o) <= 1 x 10(-3) M and 2.5 x 10(-6) M <= C(Feo)(2+) <= 2 x 10(-5) M. A pseudo first-order reaction rate with respect to O-II concentration was found to be adequate to fit the data in these experiments, in which k(ap) depends on the initial conditions following a power-law dependency (at optimum pH of 3 and absence of chloride ions). This equation, without further fitting parameters, was successfully used to validate experiments performed in a continuous stirred tank reactor (CSTR). The ability of the model predictions was also checked by performing experiments in the CSTR out of the above-mentioned ranges (used for the kinetic study).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11