Clays and Clay Minerals, Vol. 56, No. 4, 453–460, 2008.
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Authors
Kehal, Mohamed
Reinert, Laurence
Maurin, David
Bantignies, Jean-louis
Ohashi, Fumihiko
Mennour, Ammar
Duclaux, Laurent
Issue Date
2008
Type
Article
Language
Keywords
Periodicals , Geology , Adsorption , Grafting , N-methyl-D-glucamine
Alternative Title
The Trapping Of B From Water By Exfoliated And Functionalized Vermiculite.
Abstract
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 = 600ºC) 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] & 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.
Description
Clays and Clay Minerals, Vol. 56, No. 4, 453–460, 2008. The Trapping Of B From Water By Exfoliated And Functionalized Vermiculite. Mohamed Kehal; Laurence Reinert; David Maurin; Jean-louis Bantignies; Fumihiko Ohashi; Ammar Mennour; Laurent Duclaux. DOI: 10.1346/CCMN.2008.0560406. Copyright © 2008, The Clay Minerals Society.
Citation
Clays and Clay Minerals, Vol. 56, No. 4, 453–460, 2008.
Publisher
The Clay Minerals Society
License
Copyright © 2006-2018, The Clay Minerals Society