Improved wet peroxide oxidation strategies for the treatment of chlorophenols
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
Elsevier B.V.Date
2013-07-05Citation
10.1016/j.cej.2013.05.057
Chemical Engineering Journal 228 (2013): 646-654
ISSN
1385-8947DOI
10.1016/j.cej.2013.05.057Funded by
This research has been supported by the Spanish MICINN through the projects CTQ2008-03988 and CTQ2010-14807 and by the CM through the project S-2009/AMB-1588. M. Munoz thanks the Spanish Ministry of Education for a FPU research grantProject
Gobierno de España. CTQ2008-03988; Gobierno de España. CTQ2010-14807; Comunidad de Madrid. S-2009/AMB-1588/REMTAVARESEditor's Version
http://dx.doi.org/10.1016/j.cej.2013.05.057Subjects
Chlorophenol; CWPO; Fenton; Magnetic catalyst; QuímicaRights
© 2013 Elsevier B.V.Abstract
Different advanced oxidation strategies have been investigated for the treatment of chlorophenols in aqueous phase with the aim of improving the removal efficiency in terms of mineralization, remanent by-products and kinetics. Those strategies were homogeneous Fenton-like oxidation and CWPO with two different own-prepared FexOy/γ-Al2O3 catalysts. The intensification of the process by increasing the temperature has been also evaluated. CWPO of chlorophenols with those catalysts has proved to be more efficient than homogeneous Fenton-like oxidation due to a lower rate of H2O2 decomposition allowing a higher availability of hydroxyl radicals along the course of reaction. Increasing the temperature clearly improved the oxidation rate and mineralization degree of both homogeneous Fenton-like oxidation and CWPO, achieving almost 90% TOC reduction after 1h at stoichiometric H2O2 dose, 100mgL-1 initial chlorophenol concentration, 1gL-1 Fe3O4/γ-Al2O3 catalyst, pH 3 and 90°C temperature. Both FexOy/γ-Al2O3 catalysts suffered fairly low iron leaching (<5%) and a remarkable stability in a three-cycles test with 2,4,6-TCP. The use of the magnetic catalyst is preferable due to its easy separation and recovery from the liquid phase by a magnet. Its magnetic properties remained unchanged after use in CWPO
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Google Scholar:Muñoz García, Macarena
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Martínez de Pedro, Zahara
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Casas de Pedro, José Antonio
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Rodríguez Jiménez, Juan José
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