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Mineral/reagent interactions: an X-ray photoelectron spectroscopic study of adsorption of reagents onto mixtures of minerals

Published online by Cambridge University Press:  09 July 2018

G. C. Allen ,
J. R. Eastman ,
K. R. Hallam ,
G. J. Graveling ,
K. V. Ragnarsdottir  and
D. R. Skuse
G. C. Allen
Affiliation:
Interface Analysis Centre, University of Bristol
J. R. Eastman
Affiliation:
Interface Analysis Centre, University of Bristol Department of Chemistry, University of Bristol
K. R. Hallam
Affiliation:
Interface Analysis Centre, University of Bristol
G. J. Graveling
Affiliation:
Interface Analysis Centre, University of Bristol Department of Geology, University of Bristol
K. V. Ragnarsdottir
Affiliation:
Department of Geology, University of Bristol
D. R. Skuse
Affiliation:
Central Research Laboratory, ECC International plc, Cornwall, UK
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Abstract

Reagent-based selective separations of minerals are of great industrial importance. The basis of these separations is the competitive differential adsorption of the reagent onto a number of minerals. An X-ray photoelectron spectroscopic (XPS) study of the adsorption of polyacrylamide onto kaolin, feldspar and quartz is described. Initial data confirmed the utility of XPS for the study of polyacrylamide adsorption onto silica glass slides. Further results indicated the utility of the technique for the direct measurement of adsorption of polyacrylamide onto individual aliquots of kaolin, feldspar and quartz. Adsorption was relatively greatest onto kaolin. Feldspar displayed less adsorption and quartz very little. An imaging method was used to characterize, at least relatively, the competitive adsorption of polyacrylamide onto kaolin in the presence of mixtures of kaolin and quartz. This is a potential new technique for study of competitive adsorption.

Type
Research Article
Information
Clay Minerals , Volume 34 , Issue 1 , March 1999 , pp. 51 - 56
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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