Short communication, Note

The Ion-Exchange between Zn++ and Cd++ on Synthetic Zeolite of Type A

S. Lomić ; Faculty of Technology, The University, 21000 Novi Sad
I. J. Gal ; »Boris Kidric« Institute, 11000 Belgrade, Serbia, Yugoslavia

Abstract

From ion-exchange isotherm at 10 and 25° C the following
thermodynamic data for the reaction Cd++ (aq) + ZnZ (s) ~ CdZ (s) +
+Zn++ (aq), have been obtained: log K2ss = 0.354; log K298 = 0.33s;
A H~98 = - 0.57 ± 0.15 kcal/mo! and A S~8 = - 0.4 ± 0.2 cal/mol K.
The results are consistent with the data on Cd++ - Na• and Zn++ -
Na• exchanges and confirm that the three counter-ions Na+, Cd++
and zn++ exchange reversibly, independently of the initial composition
of the A-zeolite.

Keywords

Hrčak ID:

197220

URI

https://hrcak.srce.hr/197220

Publication date:

10.11.1972.

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