Flocculation and Restabilisation of Clays Using Cationic Surfactants

1 Flocculation and Restabilisation of Clays Using Cationic Surfactants 

TTie initial addition of CTAB caused a reduction in the negative surface charge of the clay (by the adsorption of CTA on the negative sites of the clay), and this was accompanied by reduction in the negative mobihty of the clay. When complete neutralisation of the clay particles occurred (at the i.e.p.), maximum flocculation of the clay suspension occurred and this was accompanied by a maximum in On further increases in CTAB concentration, a further adsorption of CTA occurred, and this resulted in charge reversal and restabilisation of the clay suspension. This was accompanied by a reduction in cr.  

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