DETECTION OF METAL ION HYDROLYSIS BY COAGULATION: II. THORIUM^1,2

Yield stress and zeta potential of nanoparticulate silica dispersions under the influence of adsorbed hydrolysis products of metal ions—Cu(II), Al(III) and Th(IV)

“…Fig. 10 shows that Cu 2+ formed four main hydrolysis products, Cu 2 (OH) 2 2+ , Cu(OH) 2 , Cu(OH) 4 2− and Cu(OH) 3 − . The concentrations of these products were highly pH-dependent.…”

“…These products are formed at a much lower pH. Between pH 2.6 and 5.0 there are four hydrolysis products, AlOH + , Al 2 (OH) 2 will undergo further hydrolysis to form Al(OH) 4 − . According to the zeta potential results in Fig.…”

“…Adsorption of the hydrolysable metal ions was also found to affect coagulation rate [3][4][5][6] and flotation recovery [7].…”

The Sorption of 210Pb, 210Bi and 210Po on Montmorillonite: A Study with Emphasis on Reversibility Aspects and on the Effect of the Radioactive Decay of Adsorbed Nuclides

“…As is the case for Bi, the sorption mechanism of Po can be described as strong specific surface complexation, predominantly on the lateral > Al -OH-groups. However, if larger conglomerates and polynuclear hydroxo complexes were formed in the liquid phase, strong sorption could occur also on the surface layer (> Si -O-groups): Matijevic [25,26] postulates that the high charges of such polynuclear species enables them to associate strongly on oxide surfaces. The sorption results of Pb, Bi and Po with montmorillonite are summarized in Table 2.…”

Ammonium phosphate slurry rheology and particle properties—The influence of Fe(III) and Al(III) impurities, solid concentration and degree of neutralization

“…Metal ions are known to form hydrolysis products at various pH levels (Baes and Mesmer, 1986). Hydrolysis products are known to adsorb readily (James and Healy, 1972a;Leong, 2005) and affect slurry rheology (Leong, 2005;Mpofu et al, 2003), electrokinetic properties (James and Healy, 1972a, b), coagulation rate (Matijevic et al, 1960;Matijevic and Janauer, 1966) and flotation recovery (Fuerstenau et al, 1965). In this study, the role of hydrolysis products on slurry properties will be examined.…”