Fig. 11 Average
hydrodynamic particle size d h
(top) and polydispersity index
(PI) (bottom) of the studied
stable PEC dispersions in
dependence on the molar ratio
nÀ/n+. PDADMAC (PD) as
PC is combined with a
commercial polyacrylamide
copolymer (PR2540):
(a; filled quares): PD is the
starting solution, (b; empty
squares): PR2540 is the
starting solution
Fig. 12 Particle size (diameter; % volume distribution) of silica dispersions without flocculant
(n+ ¼ 0.00 μmol) and treated with PD/NaPSS complexes with nÀ/n+ ratio of 0.6 in dependence
on the flocculant charge (n+) added to silica dispersions: (a) low cationic charge (0–1.88 μmol/L);
(b) higher cationic charge (1.88–6.26 μmol/L)
Polyelectrolyte Complexes in Flocculation Applications
51