Effect Of Cationic And Anionic Surfactants On Electrokinetic Potentials Of Cassiterite And Quartz In Presence Of Polyvalent Cations

Abstract

The effect of different polyvalent electrolytes (FeCl3, AICI3, LaCl3, CeCl3 and TI1CI4) on adsorption of different surfactants (primary amine hydrochloride, sodium oleate, sodium dodecyl sulfate and phenyl disodium orthophosphate) on cassiterite and quartz particles was studied using microelectrophoresis technique. The zeta potentials of the oxides and their isoelectric points were determined as a funtion of pH in presence of constant concentrations of both surfactants and electrolytes. The mechanism of adsorption of surfactants on cassiterite and quartz surfaces modified by salt cations was discussed. In general, the zeta potentials and the isoelectric points (IEPS) of the oxides in presence of the above mentioned salts are considerably changed on addition of different surfactants.