Autor según el artículo: Messele S; Bengoa C; Stüber F; Giralt J; Fortuny A; Fabregat A; Font J

Departamento: Enginyeria Química

e-ISSN: 2073-4344

Autor/es de la URV: ASHAGRE MESSELE, SELAMAWIT / Bengoa, Christophe José / Fabregat Llangostera, Azael / Font Capafons, José / Fortuny Sanromà, Agustín / Giralt Marcé, Jaume / Stüber, Frank Erich

Palabras clave: Phenol degradation Ligands Fenton system Edta Circumneutral ph

Resumen: © 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.

Áreas temáticas: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física

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

ISSN: 20734344

Direcció de correo del 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 del autor: 0000-0001-5917-8741 0000-0002-4007-7905 0000-0002-5525-5401 0000-0001-9160-5010 0000-0001-9424-1400

Fecha de alta del registro: 2023-02-22

Volumen de revista: 9

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

Enlace a la fuente original: https://www.mdpi.com/2073-4344/9/5/474

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Catalysts. 9 (5):

Referencia 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

DOI del artículo: 10.3390/catal9050474

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2019

Página inicial: 474

Tipo de publicación: Journal Publications