Articles producció científica> Enginyeria Química

Efficient elimination of tyrosol in a zero valent iron-EDTA system at mild conditions

  • Identification data

    Identifier: PC:1202
    Authors:
    Christophe BengoaJosep FontAzael FabregatFrank StüberAgustí FortunyDongmei FuSelamawit A. Messele
    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.
  • Others:

    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
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2015
    First page: 199
    Publication Type: Article Artículo Article
  • Keywords:

    Reaccions químiques
    Ferro -- Compostos
    Àcid etilendiaminotetracètic
    Langmuir-Hinshelwood (LH) model
    Fenton like process
    EDTA
    Chemical engineering
    Ingeniería química
    Enginyeria química
    1385-8947
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