Kinetics of Sr/Ba and Sr/Ca ion exchange in synthetic zeolite A
The isotopic exchange kinetics of Sr, Ba, and Ca have been measured in zeolites with different compositions and found to be describable as self-diffusion. The self-diffusion coefficients are strongly dependent on the composition. Also the Sr/Ba and Sr/Ca ion exchanges are measured in both directions and described as interdiffusion. While for Sr/Ba tolerable agreement is reached, for Sr/Ca a modification is necessary. The interdiffusion coefficient is multiplied by a factor which takes into account the activity, i.e., the selectivity of the zeolite. As a continuation of an earlier paper the zeolite is described as a mixture of microcells and free water. The above-mentioned factor must be calculated for a nonequilibrium state with respect to the water content in order to get agreement with the measurements.
- Research Organization:
- Hahn-Meitner-Institut fuer Kernforschung, Berlin, Germany
- OSTI ID:
- 6585889
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:1; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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ALKALINE EARTH ISOTOPES
ALKALINE EARTH METALS
BARIUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCIUM
CALCIUM 45
CALCIUM ISOTOPES
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIFFUSION
ELEMENTS
EVEN-ODD NUCLEI
INORGANIC ION EXCHANGERS
INTERMEDIATE MASS NUCLEI
ION EXCHANGE
ION EXCHANGE MATERIALS
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
MATERIALS
MEDIUM TEMPERATURE
METALS
MINERALS
NUCLEI
RADIOISOTOPES
REACTION KINETICS
SCINTILLATION COUNTING
SELF-DIFFUSION
STRONTIUM
ZEOLITES