Autor según el artículo: Christophe Bengoa Josep Font Azael Fabregat Frank Stüber Agustí Fortuny Dongmei Fu Selamawit A. Messele

Departamento: Enginyeria Química

Autor/es de la URV: ASHAGRE MESSELE, SELAMAWIT Dongmei Fu Agustí Fortuny STÜBER ., FRANK ERICH FABREGAT LLANGOSTERA, AZAEL FONT CAPAFONS, JOSÉ BENGOA, CHRISTOPHE JOSÉ

Palabras clave: Langmuir-Hinshelwood (LH) model Fenton like process EDTA

Resumen: This study investigates the degradation of tyrosol, a major compound of the polyphenolic fraction present in olive oil mill wastewater (OMW) by means of a zero valent iron/air Fenton like system in presence of EDTA. To the best of our knowledge it is the first time that this process is entirely devoted to tyrosol and in the effect of its experimental conditions. Reaction conditions, i.e., load of iron, concentration of EDTA, temperature and initial pH, are examined. The concentration of EDTA, the load of Fe and the temperature have a great influence on tyrosol degradation. The experimental results show that tyrosol can be removed efficiently. Above 99% of tyrosol conversion was achieved after 2h with 0.2mM tyrosol, 0.45mM EDTA, 90g/L of zero valent iron at 30°C, whereas TOC removal was 80% after 3h at the above reaction conditions. Unlike classical Fenton, Fe-EDTA oxidation system can be used in a broad pH range, from 3 to 8. Kinetic analysis using a Langmuir-Hinshelwood (LH) model shows good fitting to the experimental data. The activation energy estimated, 37.7kJ/mol, was close to that of other phenolic compounds. In addition, the EDTA rate constant obtained by model, 0.05min-1 (20°C), was in accordance with other studies. A simplified mechanism for the degradation of tyrosol is presented, where some reaction intermediates were identified. © 2014 Elsevier B.V.

Grupo de investigación: Enginyeria de la Reacció Química i Intensificació de Processos

Áreas temáticas: Chemical engineering Ingeniería química Enginyeria química

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 1385-8947

Identificador del autor: 0000-0001-9160-5010 0000-0002-4007-7905 0000-0002-5525-5401 n/a 0000-0002-2350-8654 n/a n/a

Fecha de alta del registro: 2015-08-07

Página final: 208

Volumen de revista: 260

Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion

Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S1385894714011772

DOI del artículo: 10.1016/j.cej.2014.08.110

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2015

Página inicial: 199

Tipo de publicación: Article Artículo Article