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H2O2-based oxidation processes for the regeneration of activated carbons saturated with volatile organic compounds of different polarity

This study reports the sequential regeneration treatment of activated carbons (ACs) saturated with volatile organic compounds (VOCs) of different polarity using H2O2 as oxidizing agent. In this process, VOCs were adsorbed onto the AC and further oxidized by H2O2. A commercial AC was selected and saturated with three different VOCs: two non-polar and hydrophobic VOCs, toluene and limonene, and one polar and hydrophilic VOC, methyl ethyl ketone (MEK). The saturated AC was regenerated with H2O2, and the Fenton reagent for comparison. It was found that regeneration efficiencies obtained with the H2O2 treatment were equal to or even higher than those obtained with the Fenton treatment. The fate of the pre-adsorbed VOCs, once the regeneration process is completed was studied. It was found that this regeneration treatment is limited for non-polar VOCs such as toluene and limonene, as they tend to remain adsorbed onto the ACs after regeneration treatment. Contrarily, MEK tend to be transferred to the bulk phase and react with the generated oxidant species

This work was funded by MICINN (CTQ2008-06869, CTQ2011-24114 and CONSOLIDER Project CSD-2007-0055). A. Anfruns thanks University of Girona for a predoctoral grant and R. Gonzalez-Olmos thanks MICINN for the Juan de la Cierva fellowship (JCI-2010-07104)

© Chemosphere, 2013, vol. 91, núm. 1, p. 48-54

Elsevier

Author: Anfruns Bagaria, Alba
Montes Morán, Miguel A.
González Olmos, Rafael
Martín, María José
Date: 2013 January 1
Abstract: This study reports the sequential regeneration treatment of activated carbons (ACs) saturated with volatile organic compounds (VOCs) of different polarity using H2O2 as oxidizing agent. In this process, VOCs were adsorbed onto the AC and further oxidized by H2O2. A commercial AC was selected and saturated with three different VOCs: two non-polar and hydrophobic VOCs, toluene and limonene, and one polar and hydrophilic VOC, methyl ethyl ketone (MEK). The saturated AC was regenerated with H2O2, and the Fenton reagent for comparison. It was found that regeneration efficiencies obtained with the H2O2 treatment were equal to or even higher than those obtained with the Fenton treatment. The fate of the pre-adsorbed VOCs, once the regeneration process is completed was studied. It was found that this regeneration treatment is limited for non-polar VOCs such as toluene and limonene, as they tend to remain adsorbed onto the ACs after regeneration treatment. Contrarily, MEK tend to be transferred to the bulk phase and react with the generated oxidant species
This work was funded by MICINN (CTQ2008-06869, CTQ2011-24114 and CONSOLIDER Project CSD-2007-0055). A. Anfruns thanks University of Girona for a predoctoral grant and R. Gonzalez-Olmos thanks MICINN for the Juan de la Cierva fellowship (JCI-2010-07104)
Format: application/pdf
ISSN: 0045-6535
Document access: http://hdl.handle.net/10256/11290
Language: eng
Publisher: Elsevier
Collection: MICINN/PN 2012-2015/CTQ2011-24114
MICINN/PN 2009-2012/CTQ2008-06869
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.chemosphere.2012.11.068
Articles publicats (D-EQATA)
Is part of: © Chemosphere, 2013, vol. 91, núm. 1, p. 48-54
Rights: Tots els drets reservats
Subject: Carbó activat
Carbon, Activated
Compostos orgànics volàtils
Volatile organic compounds
Aigües residuals -- Depuració
Sewage -- Purification
Aigües residuals -- Plantes de tractament
Sewage disposal plants
Title: H2O2-based oxidation processes for the regeneration of activated carbons saturated with volatile organic compounds of different polarity
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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