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Study of isotopic exchange of radioactive calcium and cerium cations with y zeolites in aqueous and alcoholic solution

Technical Report:

Abstract

Thesis. The isotopic exchange of y zeolite cations with calcium and cerium was studied. The experimental work was carried out utilizing the heterogeneous isotopic exchange between aqueous and alcoholic solutions of the cation considered and a zeolite powder containing a corresponding radioisotope. Aqueous phase exchanges demonstrate that a complex diffusion phenomenon is taking place which is capable of being decomposed into at least two distinct phases: a very slowly occurring phase representing 25 to 30% of the total exchange at ordinary temperatures and a very rapidly occurring phase. In alcoholic solutions, a rapid phase is always observed together with a slow diffusion phase although the exchange rates and diffusion coefficients may vary considerably with the nature and composition of the solvent. The results enable a hypothesis to be advanced on the ion exchange mechanism. The migration of the ions requires the crossing of two types of barrier: the large windows of the supercages (8A); the windows of the sodalite cages (2A). The two stages of the exchange kinetics can be related to these two types of barrier. (FR)
Authors:
Publication Date:
Dec 31, 1973
Product Type:
Technical Report
Report Number:
FRNC-TH-440
Reference Number:
NSA-29-024021
Resource Relation:
Other Information: Thesis
Subject:
N40230* -Chemistry-Inorganic, Organic, & Physical Chemistry-Isotope Exchange & Isotope Separation; CALCIUM; ISOTOPIC EXCHANGE; CERIUM; ALCOHOLS; AQUEOUS SOLUTIONS; CALCIUM COMPOUNDS; CATIONS; CERIUM COMPOUNDS; DIFFUSION; REACTION KINETICS; ZEOLITES
Sponsoring Organizations:
Sponsor not identified
OSTI ID:
4938382
Research Organizations:
Lyon-1 Univ., 69 (France)
Country of Origin:
France
Language:
French
Availability:
Dep. NTIS (US Sales Only) $8.00.
Submitting Site:
DTIE
Size:
Pages: 120
Announcement Date:
Jun 30, 1974

Technical Report:

Citation Formats

Guilloux, M. Study of isotopic exchange of radioactive calcium and cerium cations with y zeolites in aqueous and alcoholic solution. France: N. p., 1973. Web.
Guilloux, M. Study of isotopic exchange of radioactive calcium and cerium cations with y zeolites in aqueous and alcoholic solution. France.
Guilloux, M. 1973. "Study of isotopic exchange of radioactive calcium and cerium cations with y zeolites in aqueous and alcoholic solution." France.
@misc{etde_4938382,
title = {Study of isotopic exchange of radioactive calcium and cerium cations with y zeolites in aqueous and alcoholic solution}
author = {Guilloux, M}
abstractNote = {Thesis. The isotopic exchange of y zeolite cations with calcium and cerium was studied. The experimental work was carried out utilizing the heterogeneous isotopic exchange between aqueous and alcoholic solutions of the cation considered and a zeolite powder containing a corresponding radioisotope. Aqueous phase exchanges demonstrate that a complex diffusion phenomenon is taking place which is capable of being decomposed into at least two distinct phases: a very slowly occurring phase representing 25 to 30% of the total exchange at ordinary temperatures and a very rapidly occurring phase. In alcoholic solutions, a rapid phase is always observed together with a slow diffusion phase although the exchange rates and diffusion coefficients may vary considerably with the nature and composition of the solvent. The results enable a hypothesis to be advanced on the ion exchange mechanism. The migration of the ions requires the crossing of two types of barrier: the large windows of the supercages (8A); the windows of the sodalite cages (2A). The two stages of the exchange kinetics can be related to these two types of barrier. (FR)}
place = {France}
year = {1973}
month = {Dec}
}