
%0 Journal Article
%A Buchanan, AS 
%A Oppenheim, RC 
%T The surface chemistry of kaolinite. I. Surface leaching
%J Australian Journal of Chemistry
%D 1968/10/01
%V 21
%N 10
%P 2367-2371
%K 
%R https://doi.org/10.1071/CH9682367
%U https://www.publish.csiro.au/paper/CH9682367 
%X 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. 
