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Particle Interaction and Rheology of Illite-Iron Oxide Complexes

Published online by Cambridge University Press:  02 April 2024

Masami Ohtsubo ,
Akiko Yoshimura ,
Shin-Ichiro Wada  and
Raymond N. Yong
Masami Ohtsubo
Affiliation:
Department of Agricultural Engineering, Kyushu University, Fukuoka-shi 812, Japan
Akiko Yoshimura*
Affiliation:
Department of Agricultural Engineering, Kyushu University, Fukuoka-shi 812, Japan
Shin-Ichiro Wada
Affiliation:
Department of Agricultural Chemistry, Kyushu University, Fukuoka-shi 812, Japan
Raymond N. Yong
Affiliation:
Geotechnical Research Centre, McGill University, Montreal, Quebec H3A 2K6, Canada
*
1Present address: National Research Institute of Agricultural Engineering, Kan-nondai 2-chome, Tsukuba, Ibaraki 305, Japan.
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Abstract

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The Bingham yield stress for suspensions of illite-iron oxide complexes is examined as a function of pH and iron oxide content. Addition of iron oxides to illite increased the yield stress over a pH range of 3 to 10. With increasing pH the yield stress decreased for the complexes with iron oxides of 2 and 5% while the complexes with iron oxides of 7, 10, and 20% exhibited the maximum yield stresses at pH values from 6 to 8. The iron oxides which are not associated with the illite enhanced the yield stress more than the iron oxides precipitated on the illite surfaces. The yield stress for the complexes was correlated with their zeta potential, and the higher yield stress is considered due to smaller interparticle repulsion.

Keywords

Bingham yield stressMorphologyIlliteIron oxideParticle interactionZeta potential
Type
Research Article
Information
Clays and Clay Minerals , Volume 39 , Issue 4 , August 1991 , pp. 347 - 354
Copyright
Copyright © 1991, The Clay Minerals Society

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