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Properties of mechanically activated natural clinoptilolite and chabazite

Published online by Cambridge University Press:  09 July 2018

V. A. Nikashina*
Affiliation:
Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences, 119991 Moscow, Kosygin str. 19, Russia
A. N. Streletsky
Affiliation:
Semenov Institute of Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Kosygin str. 4, Russia
I. V. Kolbanev
Affiliation:
Semenov Institute of Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Kosygin str. 4, Russia
I. N. Meshkova
Affiliation:
Semenov Institute of Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Kosygin str. 4, Russia
V. G. Grinev
Affiliation:
Semenov Institute of Chemical Physics of Russian Academy of Sciences, 119991 Moscow, Kosygin str. 4, Russia
I. B. Serova
Affiliation:
Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences, 119991 Moscow, Kosygin str. 19, Russia
T. S. Yusupov
Affiliation:
Joint Institute of Geology, Geophysics, and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Pr. Koptyug 3, Russia
L. G. Shumskaya
Affiliation:
Joint Institute of Geology, Geophysics, and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Pr. Koptyug 3, Russia

Abstract

The effect of mechanical activation on the ion-exchange selectivity of natural zeolites from Russia, namely clinoptilolite-bearing tuffs and chabazites, was studied. The structural modifications and thermal properties were investigated, and the specific surface area and porosity of mechanically activated zeolites were determined. At activation doses of up to 1.0 kJ g–1 the main processes are the breakdown of the zeolite particles and pore structure changes. At greater activation doses amorphization takes place. It was shown that during the initial stage of activation in most cases the clinoptilolite selectivity for Sr2+ increased slightly and then decreased; the selectivity for Cu2+ increased 100 times; and the selectivity of chabazite-1 for Sr2+ increased 300 times.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2011

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