Author, as appears in the article.: Christophe Bengoa Josep Font Azael Fabregat Frank Stüber Agustí Fortuny Dongmei Fu Selamawit A. Messele
Department: Enginyeria Química
URV's Author/s: ASHAGRE MESSELE, SELAMAWIT Dongmei Fu Agustí Fortuny STÜBER ., FRANK ERICH FABREGAT LLANGOSTERA, AZAEL FONT CAPAFONS, JOSÉ BENGOA, CHRISTOPHE JOSÉ
Keywords: Langmuir-Hinshelwood (LH) model Fenton like process EDTA
Abstract: 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.
Research group: Enginyeria de la Reacció Química i Intensificació de Processos
Thematic Areas: Chemical engineering Ingeniería química Enginyeria química
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1385-8947
Author identifier: 0000-0001-9160-5010 0000-0002-4007-7905 0000-0002-5525-5401 n/a 0000-0002-2350-8654 n/a n/a
Record's date: 2015-08-07
Last page: 208
Journal volume: 260
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/pii/S1385894714011772
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1016/j.cej.2014.08.110
Entity: Universitat Rovira i Virgili
Journal publication year: 2015
First page: 199
Publication Type: Article Artículo Article