Open AccessInfluence of the Nature of the Non-Framework Cations on the Sorption Properties of Natural Stilbite
Author(s) -
M.W. Kasture,
P.N. Joshi,
Virendra Joshi,
A. L. Choudhari,
S. P. Mirajkar,
V. P. Shiralkar
Publication year - 1998
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749801600905
Subject(s) - sorption , chemistry , zeolite , adsorption , population , selectivity , analytical chemistry (journal) , inorganic chemistry , environmental chemistry , organic chemistry , sociology , catalysis , demography
A natural zeolite of stilbite type, collected from the Deccan traps (Aurangabad, M.S., India), has been investigated for its selectivity sequence in exchanging extra-framework cations for the first time, using Ca 2+ , Sr 2+ , Ba 2+ , Mg 2+ , Na + and Ag + cations as the probe cations. The different cation-exchanged forms were characterised by X-ray powder diffraction, IR spectroscopy, TG/DTA, chemical analysis and water sorption capacity. Water sorption isotherms in the temperature range 303–393 K were obtained as a function of different non-framework cations up to a pressure of 22 Torr. The sorption data were analysed in terms of different sorption models. The characteristics and population of the non-framework cations were found to influence the chemical affinity for water sorbate almost in a similar trend.