Author, as appears in the article.: Messele S; Bengoa C; Stüber F; Giralt J; Fortuny A; Fabregat A; Font J
Department: Enginyeria Química
e-ISSN: 2073-4344
URV's Author/s: ASHAGRE MESSELE, SELAMAWIT / Bengoa, Christophe José / Fabregat Llangostera, Azael / Font Capafons, José / Fortuny Sanromà, Agustín / Giralt Marcé, Jaume / Stüber, Frank Erich
Keywords: Phenol degradation Ligands Fenton system Edta Circumneutral ph
Abstract: © 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.
Thematic Areas: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 20734344
Author's mail: agustin.fortuny@urv.cat jaume.giralt@urv.cat jose.font@urv.cat afabrega@urv.cat christophe.bengoa@urv.cat frankerich.stuber@urv.cat
Author identifier: 0000-0001-5917-8741 0000-0002-4007-7905 0000-0002-5525-5401 0000-0001-9160-5010 0000-0001-9424-1400
Record's date: 2023-02-22
Journal volume: 9
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.mdpi.com/2073-4344/9/5/474
Papper original source: Catalysts. 9 (5):
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
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.3390/catal9050474
Entity: Universitat Rovira i Virgili
Journal publication year: 2019
First page: 474
Publication Type: Journal Publications