Articles producció científica> Enginyeria Química

Enhanced degradation of phenol by a fenton-like system (Fe/EDTA/h2 o2) at circumneutral pH

  • Dades identificatives

    Identificador: imarina:5700034
    Autors:
    Messele SBengoa CStüber FGiralt JFortuny AFabregat AFont J
    Resum:
    © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This work deals with the degradation of phenol based on the classical Fenton process, which is enhanced by the presence of chelating agents. Several iron-chelating agents such as ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriamine pentaacetic acid (DTPA), and ethylenediamine-N,N’-diacetic acid (EDDA) were explored, although particular attention was given to EDTA. The effect of the molar ligand to iron ratio, EDTA:Fe, initial pH, and temperature on the oxidation process was studied. The results demonstrate that the proposed alternative approach allows the capacity for degrading phenol to be extended from the usual acidic pH (around 3.0) to circumneutral pH range (6.5–7.5). The overall feasibility of the process depends on the concentration of the chelating agent and the initial pH of the solution. The maximum phenol conversion, over 95%, is achieved using a 0.3 to 1 molar ratio of EDTA:Fe, stoichiometric ratio of H2 O2 at an initial pH of 7.0, and a temperature of 30◦ C after 2 hours of reaction, whereas only 10% of phenol conversion is obtained without EDTA. However, in excess of ligand (EDTA:Fe > 1), the generation of radicals seems to be strongly suppressed. Improvement of the phenol removal efficiency at neutral pH also occurs for the other chelating agents tested.
  • Altres:

    Autor segons l'article: Messele S; Bengoa C; Stüber F; Giralt J; Fortuny A; Fabregat A; Font J
    Departament: Enginyeria Química
    e-ISSN: 2073-4344
    Autor/s de la URV: ASHAGRE MESSELE, SELAMAWIT / Bengoa, Christophe José / Fabregat Llangostera, Azael / Font Capafons, José / Fortuny Sanromà, Agustín / Giralt Marcé, Jaume / Stüber, Frank Erich
    Paraules clau: Phenol degradation Ligands Fenton system Edta Circumneutral ph
    Resum: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This work deals with the degradation of phenol based on the classical Fenton process, which is enhanced by the presence of chelating agents. Several iron-chelating agents such as ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriamine pentaacetic acid (DTPA), and ethylenediamine-N,N’-diacetic acid (EDDA) were explored, although particular attention was given to EDTA. The effect of the molar ligand to iron ratio, EDTA:Fe, initial pH, and temperature on the oxidation process was studied. The results demonstrate that the proposed alternative approach allows the capacity for degrading phenol to be extended from the usual acidic pH (around 3.0) to circumneutral pH range (6.5–7.5). The overall feasibility of the process depends on the concentration of the chelating agent and the initial pH of the solution. The maximum phenol conversion, over 95%, is achieved using a 0.3 to 1 molar ratio of EDTA:Fe, stoichiometric ratio of H2 O2 at an initial pH of 7.0, and a temperature of 30◦ C after 2 hours of reaction, whereas only 10% of phenol conversion is obtained without EDTA. However, in excess of ligand (EDTA:Fe > 1), the generation of radicals seems to be strongly suppressed. Improvement of the phenol removal efficiency at neutral pH also occurs for the other chelating agents tested.
    Àrees temàtiques: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20734344
    Adreça de correu electrònic de l'autor: agustin.fortuny@urv.cat jaume.giralt@urv.cat jose.font@urv.cat afabrega@urv.cat christophe.bengoa@urv.cat frankerich.stuber@urv.cat
    Identificador de l'autor: 0000-0001-5917-8741 0000-0002-4007-7905 0000-0002-5525-5401 0000-0001-9160-5010 0000-0001-9424-1400
    Data d'alta del registre: 2023-02-22
    Volum de revista: 9
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2073-4344/9/5/474
    Referència a l'article segons font original: Catalysts. 9 (5):
    Referència de l'ítem segons les normes APA: Messele S; Bengoa C; Stüber F; Giralt J; Fortuny A; Fabregat A; Font J (2019). Enhanced degradation of phenol by a fenton-like system (Fe/EDTA/h2 o2) at circumneutral pH. Catalysts, 9(5), -. DOI: 10.3390/catal9050474
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.3390/catal9050474
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2019
    Pàgina inicial: 474
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Catalysis,Chemistry, Physical,Physical and Theoretical Chemistry
    Phenol degradation
    Ligands
    Fenton system
    Edta
    Circumneutral ph
    Química
    Physical and theoretical chemistry
    Farmacia
    Environmental science (all)
    Engenharias ii
    Ciências biológicas ii
    Chemistry, physical
    Catalysis
    Astronomia / física
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