Recovery of Zinc from Aqueous Solutions Using Fine Modified Aluminosilicates
E. V. Ganebnykh, A. V. Sviridov, G. I. Maltsev
Ural State Forestry University, Sibirskiy Trakt, 37, Yekaterinburg 620100, Russia
Keywords: montmorillonite, aluminosilicates, zinc, sorption, intercalation
Abstract
The isotherms of zinc adsorption from solutions on natural and modified montmorillonites were recorded. It was shown that adsorption processes can be described with the help of Langmuir and S-like adsorption isotherms; their shape is determined by both the properties of sorbent surface and the forms of zinc occurrence in aqueous solutions. Intercalation of the sodium form of montmorillonite by modifying agents allows a sharp increase in limiting adsorption of zinc ions and broadening of the pH value region corresponding to the high degree of metal recovery.
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