Abstract
The effect of charge density of cationic polymer flocculants on flocculation was investigated for dispersions of negatively charged polystyrene latex particles, and the flocculation mechanism was estimated. It was found that particle charges are neutralized at the maximum flocculation concentration (mfc) determined by the jar test and that the rate of Brownian flocculation at the mfc increases with the charge density of polymers. And it is indicated that the flocculation is attributed mainly to the charge neutralization of particles by polymers and partly to the configuration of cations on the particle surface.
