Polymer adsorption and flocculation

If only electrostatic effects are responsible for polymer adsorption and flocculation, our results can be explained according to the same scheme as that used by Furusawa et Al.(20) to interprete the destabilization of negatively charged latex by a cationic polymer. In a first step, the adsorption of the polymer leads to the neutralization of the particles which are no more stabilized by electrostatic repulsions and there is flocculation (we have not studied this step since in our experiments polymer was always in large excess with respect to Al(0H)3). In a second step the adsorption inverses the charge and (we have indeed measured by... 

Fig. 10.44 Principle of polymer adsorption and flocculation [B. 26]. (a) Adsorption of polymer molecule on the particle, (b) rearrangement of adsorbed chain, (c) collisions between destabilized particles and bridging to form aggregates (floes), (d) break-up of floes.

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See also in sourсe #XX -- [ ]

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