The surface chemistry of kaolinite. I. Surface leaching
- 1 January 1968
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 21 (10) , 2367-2371
- https://doi.org/10.1071/ch9682367
Abstract
Aqueous suspensions of kaolinite from Mt. Egerton, Victoria, have been leached at pH 2.25 and 6.0. More ions, in particular aluminium, than predicted from the published cation-exchange capacity have been detected in the leachate. An activation energy of 5 kcal/mole has been calculated for this process of surface leaching. Using a supporting electrolyte of, for example, 10-4M KCl, the electrophoretic mobility of leached and raw clay has been examined as a function of pH, and differences in mobility have been correlated with aluminium removal from the clay surface.Keywords
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