Zinc/ions/salts adsorption

McNabb and Machemer( ) studied the interaction of zinc salts with silicates and suggested that the presence of silicate enhanced the hydrolysis of Zn " ". A mutual adsorption of Zn(0H)2 and colloidal silica was suggested as part of the interaction. Silicates with high proportions of Si02 reacted with zinc ions without the formation of precipitates. 

In the 2nd period ranging from the 1930s to the 1950s, basic research on flotation was conducted widely in order to understand the principles of the flotation process. Taggart and co-workers (1930, 1945) proposed a chemical reaction hypothesis, based on which the flotation of sulphide minerals was explained by the solubility product of the metal-collector salts involved. It was plausible at that time that the floatability of copper, lead, and zinc sulphide minerals using xanthate as a collector decreased in the order of increase of the solubility product of their metal xanthate (Karkovsky, 1957). Sutherland and Wark (1955) paid attention to the fact that this model was not always consistent with the established values of the solubility products of the species involved. They believed that the interaction of thio-collectors with sulphides should be considered as adsorption and proposed a mechanism of competitive adsorption between xanthate and hydroxide ions, which explained the Barsky empirical relationship between the upper pH limit of flotation and collector concentration. Gaudin (1957) concurred with Wark s explanation of this phenomenon. Du Rietz... 

Environmental stress cracking of Nylon-6, 6 in inorganic salt solutions has been examined by X-ray dispersive techniques to analyse adsorbed ions on the fracture surface. The mechanism of adsorption of zinc cations on to the carbonyl groups and solvation of the cations with water to weaken the binding between the chains has been confirmed. Different cations behave differently, and lithium cations require solvent as a bridge. " Different fracture surface features result from the two crazing salt solution types. 

Qiu et al. [22] have demonstrated a technique for removal of Lead, Copper, Nickel, Cobalt, and Zinc from water by application of a Cancrinite type zeolite synthesized from fly ash, by employing molten salt method. The degree of heavy metal adsorption has been reported to vary with the type of ion exchange... 

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