Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-18T17:09:05.592Z Has data issue: false hasContentIssue false
  • English
  • Français

Charge Reversal of Kaolinite by Hydrolyzable Metal Ions: An Electroacoustic Study

Published online by Cambridge University Press:  28 February 2024

Robert J. Hunter  and
Michael James
Robert J. Hunter
Affiliation:
School of Chemistry, University of Sydney, New South Wales 2006, Australia
Michael James
Affiliation:
School of Chemistry, University of Sydney, New South Wales 2006, Australia
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Electroacoustic measurements at 1 MHz, using the Electro-Sonic Amplitude (ESA), on a kaolinite suspension provide a ready method for following the adsorption of hydrolyzable metal ions onto the clay surface. Co2+, Cd2+ and Cu2+ ions show similar behavior: The initially negative surface becomes less negative, approaches zero, and may become positive at pH values around neutral, depending on the initial metal concentration. At higher pH, electrokinetic potential goes through a maximum. If the surface has become positive, it becomes less so; and at still higher pH values it may become negative again, depending on the metal ion concentration. The behavior can be interpreted using the model proposed by James and Healy.

Keywords

AdsorptionCadmiumCharge reversalCobaltCopperElectroacousticsElectrokineticsKaolinMetal ions (hydrolyzable)
Type
Research Article
Information
Clays and Clay Minerals , Volume 40 , Issue 6 , December 1992 , pp. 644 - 649
Copyright
Copyright © 1992, The Clay Minerals Society

References

Dillard, J. G. and Koppelman, M. H., 1982 X-ray photoelectron spectroscopy (XPS) surface characterisation of cobalt on the surface of kaolinite J. Colloid Interface Sci. 87 46 – 55 10.1016/0021-9797(82)90370-8.CrossRefGoogle Scholar
Greenland, D. J. and Quirk, J. P., 1962 Surface area of colloids Int. Soc. Soil Sci. Trans. Joint Meeting Comm. IV & V (New Zealand) 79 – 86.Google Scholar
Greenland, D. J. and Quirk, J. P., 1963 Determination of surface areas by adsorption of cetyl pyridinium bromide from aqueous solution J. Phys. Chem. 67 2886 – 2887 10.1021/j100806a533.CrossRefGoogle Scholar
Healy, T. W., James, R. O. and Cooper, R., 1968 Adsorption of aqueous Co (II) at the silica-water interface Advan. Chem. 79 62 – 73 10.1021/ba-1968-0079.ch006.CrossRefGoogle Scholar
Hunter, R. J., 1981 Zeta Potential in Colloid Science New York and London Academic Press.Google Scholar
Hunter, R. J., 1987 Foundations of Colloid Science, Vol. I Oxford Oxford University Press.Google Scholar
James, M., Hunter, R. J. and O’Brien, R. W., 1991 Effect of particle size distribution and aggregation on electroacoustic measurements of f potential Langmuir 8 420 – 423 10.1021/la00038a017.CrossRefGoogle Scholar
James, R. O. and Healy, T. W., 1972 Adsorption of hydrolysable metal ions at the oxide-water interface, Part I, II and III J. Colloid Interface Sci. 40 42 – 52 10.1016/0021-9797(72)90172-5.CrossRefGoogle Scholar
O’Brien, R. W., 1988 Electro-acoustic effects in a dilute suspension of spherical particles J. Fluid Mech. 190 71 – 86 10.1017/S0022112088001211.CrossRefGoogle Scholar
O’Brien, R. W., 1990 The electroacoustic equations for a colloidal suspension J. Fluid Mech. 212 81 – 93 10.1017/S0022112090001872.CrossRefGoogle Scholar
O’Brien, R. W., Midmore, B. R., Lamb, A. and Hunter, R. J., 1990 Electroacoustic studies of moderately concentrated colloidal suspensions Faraday Disc. Chem. Soc. 90 301 – 312 10.1039/dc9909000301.CrossRefGoogle Scholar
Posner, A. M. and Quirk, J. P., 1964 The adsorption of water from concentrated electrolyte solutions by montmorillonite and illite Proc. Royal Soc. (London) A278 35 – 56.Google Scholar
Rowlands, W. N. and Hunter, R. J., 1992 Electroacoustic study of adsorption of cetyl pyridinium chloride on kaolinite Clays & Clay Minerals 40 287 – 291 10.1346/CCMN.1992.0400306.CrossRefGoogle Scholar
Scales, P. and Jones, E., 1992 Effect of particle size distribution on the accuracy of electroacoustic mobilities Langmuir 8 385 – 389 10.1021/la00038a011.CrossRefGoogle Scholar