OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Kinetic study of defluoridation of drinking water by electrocoagulation/electroflotation in a stirred tank reactor and in an external-loop airlift reactor

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, vol. 164 (n° 1). pp. 106-114. ISSN 1385-8947

[img] (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
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
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Ecole Nationale Supérieure de Chimie de Clermont-Ferrand - ENSCCF (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Université Hassan II Casablanca - UH2C (MOROCCO)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Laboratory name:
Statistics:download
Deposited By: Audrey LEFEVRE

Repository Staff Only: item control page