Abstract
The flocculation rate of selected clays, i.e., montmorillonite, hydrated halloysite, allophane and imogolite by several electrolytes was investigated spectrophotometrically. In general, flocculation power of inorganic electrolytes showed considerable dependence upon the valence of the counter ions. Organic electrolytes exhibited significantly higher flocculating power than inorganic electrolytes. In the case of imogolite, flocculation rate considerably varied because of the introduced fine air bubbles. The valence effect of anion on the flocculation of imogolite was not so significant. The effect of particle size on this method was also discussed.
