A method of ion exchange of Na+ for divalent cations in NaA zeolite under static conditions was developed and can be used for the measurement of the differential heats of ion exchange by a calorimetric method.
The isotherms of the ion exchange of Na+ at 25° in molded NaA zeolite for the cations Mg2+, Ca2+, Zn2+, and Cd2+ were measured. The corresponding cationic forms of MA zeolites with degrees of exchange n z M =1, and for MgA with nz Mg=0.8, were measured.
Derivatograms (DTA and PG) of the synthesized zeolites were obtained, indicating the absence of any appreciable breakdown of the crystal structures of the zeolites during the process of ion exchange.
The thermodynamic characteristics of the investigated reactions of ion exchange were calculated. The coefficients of separation, selectivity, and the thermodynamic equilibrium constants as a function of the degree of ion exchange, as well as the integral values of the free energies of the exchange reaction, were determined. According to all these parameters, the cations are arranged in the following series: Mg2+ < Ca2+ < Zn2+ < Cd2+.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
R. M. Barrer and W. M. Meier, Trans. Faraday Soc.,54, 1074 (1958).
M. M. Dubinin, A. A. Isirikyan, A. I. Sakharov, and V. V. Serpinskii, Izv. Akad. Nauk SSSR, Ser. Khim., 2355 (1969).
R. M. Barrer and J. D. Falconer, Proc. Roy. Soc., A236, 227 (1956).
R. M. Barrer, L. V. C. Rees, and D. J. Ward, Proc. Roy. Soc., A273, 180 (1963).
D. W. Breck, W. C. Eversole, R. M. Milton, T. B. Reed, and T. L. Thomas, J. Amer. Chem. Soc.,78, 5963 (1956).
I. J. Gal, O. Iankovic, S. Malcic, P. Radovanov, and M. Todorović, Trans. Faraday Soc.,67, 999 (1971).
G. M. Panchenkov, A. M. Tolmachov, and V. A. Frolov, Zh. Fiz. Khim.,37, 456 (1963).
H. S. Sherry and H. F. Walton, J. Amer. Chem, Soc.,71, 1457 (1967).
F. Danes and F. Wolf, Z. Phys. Chem.,251, 329 (1972).
B. P. Nikol'skii, Zh. Fiz. Khim.,5, 266 (1934).
E. Glueckauf, Nature,163, 414 (1949).
L. L. Ames, Amer. Miner.,49, 1099 (1964).
W. J. Argersinger, A. W. Devidson, and O. D. Bonner, J. Amer. Chem. Soc.,74, 1044 (1952).
E. Högfeldt, E. Ekedahl, and L. G. Sillen, Acta Chem. Scand.,4, 556, 828, 1471 (1950).
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1244–1249, June, 1974.
About this article
Cite this article
Dubinin, M.M., Isirikyan, A.A. & Regent, N.I. Isotherms of the equilibrium exchange of Mg2+, Ca2+, Zn2+, and Cd2+ ions on NaA zeolite. Russ Chem Bull 23, 1172–1177 (1974). https://doi.org/10.1007/BF00923072
- Crystal Structure
- Free Energy
- Static Condition
- Exchange Reaction