Abstract: The kinetics of coagulation have been studied for systems of silica dispersions destabilized by hydrolyzed Al(III). The rate of agglomeration is a function of (1) the collision frequency which is determined by physical parameters such as colloid size and concentration and velocity gradients in the medium; and (2) of the collision efficiency factor which reflects the stability of the colloid. This relative stability has been determined as a function of chemical solution parameters such as pH and the ratio of coagulant concentration and surface concentration of the dispersed phase. The destabilization of silica dispersions results from specific adsorption of positively charged hydroxo aluminum complexes onto the negatively charged colloid surface causing a decrease and ultimately a reversal of sign of the surface potential.
Publication Year: 1968
Publication Date: 1968-06-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 29
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