Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Binary cation exchange in clinoptilolite involving K (super +) , Na (super +) , Ba (super 2+) and Ca (super 2+) at 30 and 95 degrees C; a calorimetric study

N. Petrova, L. Filizova and G. Kirov
Binary cation exchange in clinoptilolite involving K (super +) , Na (super +) , Ba (super 2+) and Ca (super 2+) at 30 and 95 degrees C; a calorimetric study (in Zeolite 2010, Ognyan E. Petrov (prefacer) and David L. Bish (prefacer))
Clay Minerals (June 2011) 46 (2): 251-259

Abstract

A binary ion exchange of cationic pairs involving K, Na, Ba and Ca in clinoptilolite was investigated calorimetrically. The selected cations included two pairs equal in charge and two pairs similar in size. The heats of ion exchange and the degrees of exchange were determined at 30 and 95 degrees C. The data obtained are discussed with respect to cationic interactions in the clinoptilolite structure and hydration characteristics (heats of hydration and hydration numbers) of competing cations in the solution. No correlation was found between the heat effects and the degree of exchange. The heat of exchange depends mainly on the difference between the hydration heats of the cations in the solution, whereas the degree of exchange depends on their positioning over the extra-framework sites in the clinoptilolite structure. The heats of ion exchange are lower at 95 degrees C than those measured at 30 degrees C, which is due to a decrease of the hydration number with increasing temperature. In all cases the degree of exchange increases with increasing temperature.


ISSN: 0009-8558
EISSN: 1471-8030
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 46
Serial Issue: 2
Title: Binary cation exchange in clinoptilolite involving K (super +) , Na (super +) , Ba (super 2+) and Ca (super 2+) at 30 and 95 degrees C; a calorimetric study
Title: Zeolite 2010
Author(s): Petrova, N.Filizova, L.Kirov, G.
Author(s): Petrov, Ognyan E.prefacer
Author(s): Bish, David L.prefacer
Affiliation: Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography, Sofia, Belgium
Affiliation: Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography, Sofia, Belgium
Pages: 251-259
Published: 201106
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
Meeting name: 8th international conference on the Occurrence, properties and utilization of natural zeolites (Zeolite 2010)
Meeting location: Sofia, BEL, Belgium
Meeting date: 20100710July 10-18, 2010
References: 27
Accession Number: 2011-073189
Categories: Geochemistry of rocks, soils, and sedimentsSedimentary petrology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Secondary Affiliation: Indiana University, USA, United StatesSofia University, BEL, Belgium
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201140
Close Modal

or Create an Account

Close Modal
Close Modal