OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Competitive adsorption of p-hydroxybenzoic acid and phenol on activated carbon : experimental study and modelling

Andriantsiferana, Caroline and Julcour-Lebigue, Carine and Creanga-Manole, Carmen and Delmas, Henri and Wilhelm, Anne-Marie Competitive adsorption of p-hydroxybenzoic acid and phenol on activated carbon : experimental study and modelling. (2013) Journal of Environmental Engineering, vol. 139 (n° 3). pp. 402-409. ISSN 0733-9372

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
604kB

Official URL: http://dx.doi.org/10.1061/(ASCE)EE.1943-7870.0000600

Abstract

The competitive adsorption of phenol and p-hydroxybenzoic acid (4HBA) has been investigated on activated carbon (AC) for a wide range of concentrations under unbuffered conditions. The results show a preferential adsorption of 4HBA which can be explained by the lower solubility of 4HBA and the electrostatic interactions between the AC and the ionic form of the molecule in this range of pH. The Langmuir isotherm is found suitable to describe the single-component adsorptions, indicating a monolayer adsorption in accordance with the microporous nature of the AC. Then the empirical extended Langmuir model and the predictive Ideal Adsorption Solution Theory model have been compared for competitive adsorption. When using parameter values optimized for single pollutants, both models show rather poor agreement with mixture data. However after fitting the extended Langmuir parameters with the whole data set, better results can be obtained, showing that there is some peculiar behaviour of the mixture under oxic conditions, probably tied to the effect of 4HBA on the irreversible adsorption of phenol.

Item Type:Article
Additional Information:Thanks to American Society of Civil Engineers editor. The definitive version is available at http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EE.1943-7870.0000600
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Réaction, mélange & séparation (RMS)
Statistics:download
Deposited By: Carine JULCOUR
Deposited On:07 Mar 2013 11:36

Repository Staff Only: item control page