Essadki, Abdel Hafid and Gourich, Bouchaib and Azzi, Mohammed and Vial, Christophe and Delmas, Henri
Kinetic study of defluoridation of drinking water by electrocoagulation/electroflotation in a stirred tank reactor and in an external-loop airlift reactor.
(2010)
Chemical Engineering Journal, 164 (1). 106-114. ISSN 1385-8947
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 627kB |
Official URL: http://dx.doi.org/10.1016/J.CEJ.2010.08.037
Abstract
A kinetic study of defluoridation of drinking water was carried out using the electrocoagulation/electroflotation process in two batch reactors of identical volume (20 L): a stirred tank reactor (STR) and an external-loop airlift reactor (ELALR). When the evolution of fluoride content was independent of stirring speed, experimental results showed that the kinetics of fluoride removal could be modelled using a variable-order-kinetic (VOK) approach coupled with a Langmuir–Freundlich adsorption model in the STR. Conversely, when mixing was less efficient, which is the case in the ELALR, experimental data could be fitted adequately only using a pseudo-first-order model. This constitutes however only an empirical approach based on a lumped parameter that accounts simultaneously for mass transfer, adsorption and electrochemical steps. In this case, only regression analysis could be used to establish a quantitative relationship between the kinetic constant and the operating conditions, such as current density and initial fluoride concentration.
Item Type: | Article |
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Additional Information: | Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at : http://www.sciencedirect.com/science/article/pii/S1385894710007588 |
Audience (journal): | International peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | French research institutions > Agence de l'Environnement et de la Maîtrise de l'Energie - ADEME (FRANCE) French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Other partners > Ecole Nationale Supérieure de Chimie de Clermont-Ferrand - ENSCCF (FRANCE) Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Other partners > Université Hassan II Casablanca - UH2C (MOROCCO) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) |
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Deposited On: | 12 Jun 2012 14:56 |
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