Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Clays and Clay Minerals Email Content Delivery
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Clays and Clay Minerals; August 2008; v. 56; no. 4; p. 453-460; DOI: 10.1346/CCMN.2008.0560406
© 2008 Clay Minerals Society
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kehal, M.
Right arrow Articles by Duclaux, L.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

THE TRAPPING OF B FROM WATER BY EXFOLIATED AND FUNCTIONALIZED VERMICULITE

Mohamed Kehal1,2, Laurence Reinert1, David Maurin3, Jean-Louis Bantignies3, Fumihiko Ohashi4, Ammar Mennour2 and Laurent Duclaux1,*

1 Laboratoire de Chimie Moléculaire et Environnement, Polytech’Savoie –Université de Savoie, 73376 Le Bourget du Lac Cedex, France
2 Laboratoire Pollution et Traitement des Eaux, Département de Chimie, Université Mentouri, 25000 Constantine, Algeria
3 Laboratoire des colloïdes verres et nanomatériaux (UMR CNRS 5587), Université Montpellier II, 34095 Montpellier Cedex 5, France
4 Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Shimo-Shidami, Moriyama, Nagoya 463-8560, Japan

* E-mail address of corresponding author: laurent.duclaux{at}univ-savoie.fr

Micron-grade natural vermiculite was modified by several physical and chemical treatments in order to increase the adsorption capacity of this material for B. A thermal exfoliation (T = 600°C) of pristine material, a chemical exfoliation through reaction with hydrogen peroxide (H2O2 35%), or grafting of a specific B complexant (i.e. N-methyl-D-glucamine: NMDG) led to an increase in the uptake of B at low initial concentrations of the aqueous solutions ([B] {approx} 5 mg L–1). The more efficient material is the NMDG-grafted clay, for which the adsorption uptake is four times greater than that of raw vermiculite, and reaches 0.04 mmol g–1. For all modified materials, the effect of the pH on B adsorption and the adsorption kinetics were studied and compared to raw vermiculite. Adsorption isotherms were also plotted and fitted well with the Freundlich equation.

Key Words: Adsorption • Grafting • N-methyl-D-glucamine






JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Clay Minerals Society