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An Assessment of the Surface Properties of Milled Attapulgite Using Inverse Gas Chromatography

Published online by Cambridge University Press:  01 January 2024

L. Boudriche ,
B. Hamdi ,
Z. Kessaïssia ,
R. Calvet ,
A. Chamayou ,
J. A. Dodds  and
H. Balard
L. Boudriche
Affiliation:
Centre de Recherche Scientifique et Technique en Analyse Physico-Chimique (C.R.A.P.C), BP 248, Alger Rp, 16004, Alger, Algeria Laboratiore d’Etude Physico-Chimique des Matériaux et Application à l’Environnement, Faculté de Chimie, USTHB, BP 32, El Alia, Bab Ezzouar, 16111, Alger, Algeria
B. Hamdi
Affiliation:
Laboratiore d’Etude Physico-Chimique des Matériaux et Application à l’Environnement, Faculté de Chimie, USTHB, BP 32, El Alia, Bab Ezzouar, 16111, Alger, Algeria
Z. Kessaïssia
Affiliation:
Laboratiore d’Etude Physico-Chimique des Matériaux et Application à l’Environnement, Faculté de Chimie, USTHB, BP 32, El Alia, Bab Ezzouar, 16111, Alger, Algeria
R. Calvet*
Affiliation:
Ecole des Mines d’Albi Carmaux, Campus Jarlard, 81013 Albi CEDEX 09, France
A. Chamayou
Affiliation:
Ecole des Mines d’Albi Carmaux, Campus Jarlard, 81013 Albi CEDEX 09, France
J. A. Dodds
Affiliation:
Ecole des Mines d’Albi Carmaux, Campus Jarlard, 81013 Albi CEDEX 09, France
H. Balard
Affiliation:
Laboratoire de Chimie Physique, ENSISA-W, 11, rue Werner, 68093 Mulhouse CEDEX, France
*
* E-mail address of corresponding author: rachel.calvet@mines-albi.fr
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Abstract

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The most common means of reducing the particle size of solids is by grinding, a process which can affect the surface properties and the behavior of the solid in later stages (granulation, compaction, etc.), and which can influence the end-use properties of the final product. Inverse gas chromatography (IGC) measurements were used here to evaluate the influence of grinding, in a ball mill, on attapulgite. The milling experiments were performed in dry media for various periods. After 30 min of grinding, significant decreases in the particle size and specific surface areas were observed when calculated using different probes. No noticeable variation in the surface properties was observed by IGC either at infinite dilution or at finite concentration, however. In particular, the distribution functions of the adsorption energies (DFAE), giving information about the surface heterogeneity for both an apolar probe (octane) and a polar probe (isopropanol), remained unchanged, regardless of the grinding time. The stability of the surface energy with respect to the grinding process was seen to be related to the particular fibrous structure of the attapulgite clay.

Keywords

Adsorption Energy Distribution FunctionsAttapulgiteGrindingInverse Gas ChromatographyPalygorskiteSurface Properties
Type
Article
Information
Clays and Clay Minerals , Volume 58 , Issue 2 , April 2010 , pp. 143 - 153
Copyright
Copyright © Clays and Clay Minerals 2010

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