Journal
THEORETICAL AND EXPERIMENTAL CHEMISTRY
Volume -, Issue -, Pages 222-230Publisher
SPRINGER
DOI: 10.1007/s11237-023-09782-5
Keywords
clinoptilolite; zeolite; exchange complex; selectivity; thermodynamic constants
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This study investigates the influence of zeolite framework composition on the selectivity and thermodynamic parameters of ion exchange. It is found that a decrease in the Si/Al ratio in the framework enhances the thermodynamic affinity of Na-forms towards Ca(2+ ) cations.
The effect of the zeolite framework composition on the selectivity and thermodynamic parameters of ion exchange is studied for the exchange reaction of Ca2+ cations on Na-forms of clinoptilolites from nine deposits of Central and Southeast Europe, Northeast Asia, and North America. An increase in the thermodynamic affinity of Na-forms towards Ca(2+ )cations is shown with a decrease in the Si/Al ratio in their zeolite framework.
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