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Correlation between eletrokinetic mobility and ionic dyes adsorption of Moroccan stevensite

Bouna, Lahcen and Rhouta, Benaïssa and Amjoud, M'barek and Jada, Amane and Maury, Francis and Daoudi, Lahcen and Senocq, François Correlation between eletrokinetic mobility and ionic dyes adsorption of Moroccan stevensite. (2010) Applied Clay Science, 48 (3). 527-530. ISSN 0169-1317

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Official URL: http://dx.doi.org/10.1016/j.clay.2010.02.004


This study aims at establishing a correlation between the electrical charge of Moroccan stevensite particles and ionic dyes adsorption. The electrophoretic mobility, (Ue), of the stevensite particles in water, was measured at pH 2.5–12 by microelectrophoresis. At pH between 2.5 and 8, Ue remained constant (Ue = − 1.6 10− 8 m2/(V s)), as resulting from the permanent charge of the clay mineral planar surfaces. At pH > 8, the magnitude of electrophoretic mobility increased (Ue = − 2.7 10− 8 m2/(V s)) due to the deprotonation of silanol groups on the surfaces. The anionic Orange G adsorption at the clay mineral–water interface was negligible whereas the methylene blue cations were strongly adsorbed due to the electrostatic attraction.

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 Applied Clay Science website :http://www.sciencedirect.com/science/journal/01691317
HAL Id:hal-03551013
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 - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Cadi Ayyad - UCAM (MOROCCO)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Laboratory name:
Deposited On:18 Apr 2011 16:26

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