PROPERTIES OF INORGANIC ION EXCHANGERS WITH A ZIRCONIUM BASE AND OF CLAY MINERALS (in German)
Comparative studies were made on the exchange capacities and distribution coefficients of inorganic exchangers with a zirconium and a hafnium base (phosphate, tungstate, and molybdate) and with the clay minerals glaukonite, Pelagic Clay,'' and montmorillonite. The K/sub p/ values for the ions Na/sup +/ , K/sup +/, Rb/sup +/, Cs/sup +/, Fr/sup +/, Ca/sup 2+/ , Sr/s up 2+/, Sc/sup 3+/ , Y/sup 3+/, and Ce/sup 3+/ were determined for these materials and for a synthetic ultramarine. A series of ion separations was carried out. Among others, a Ca/sup 2+/--Sc/sup 3+/ separation on radioresistant zirconium molybdate, which is of interest for the preparation of carrier-free Ca/sup 45/, was carried out. The minerals were shown to be, as was known of exchangers with a Zr basis, very specific exchangers for Cs/sup +/ ions. The pH dependence of the exchanger properties was studied in detail, and an attempt was made to predict the most suitable conditions for radiochemical separations in dependence on the selectivity coefficients (K/sub S/ values). An interesting reversal effect'' was observed in the affinity sequence with respect to the ion pair Sr/ sup 2+/--Y/sup 3+/ on zirconium phosphate and even on zirconium tungstate. This effect can be used for the preparation of radioyttrium by elution of a Sr/sup 90/- charged microcolumn. A reversal effect'' was not observed on zirconium molybdate. The basis for the decrease of the Y/sup 3+/ yield after repeated elutlons ( Y/sup 90/ milking'') is discussed. (tr-auth)
- Research Organization:
- Kernforschungsanlage, Julich, Ger.
- NSA Number:
- NSA-17-025364
- OSTI ID:
- 4701376
- Journal Information:
- Nukleonik (West Germany) Discontinued with vol. 12, Journal Name: Nukleonik (West Germany) Discontinued with vol. 12 Vol. Vol: 5; ISSN NUKKA
- Country of Publication:
- Country unknown/Code not available
- Language:
- German
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Related Subjects
ALUMINUM SILICATES
CALCIUM COMPOUNDS
CERIUM COMPOUNDS
CESIUM COMPOUNDS
CHEMISTRY
CLAYS
COW-MILKERS
DISTRIBUTION
EFFICIENCY
FRANCIUM COMPOUNDS
GLAUCONITE
HAFNIUM OXIDES
HAFNIUM PHOSPHATES
ION EXCHANGE MATERIALS
IRON SILICATES
LEACHING
MOLYBDENUM OXIDES
MONTMORILLONITE
PIGMENTS
POTASSIUM COMPOUNDS
QUANTITATIVE ANALYSIS
RADIOCHEMISTRY
RUBIDIUM COMPOUNDS
SCANDIUM COMPOUNDS
SODIUM COMPOUNDS
STRONTIUM 90
STRONTIUM COMPOUNDS
TUNGSTATES
ULTRAMARINE
YTTRIUM 90
YTTRIUM COMPOUNDS
ZIRCONIUM OXIDES
ZIRCONIUM PHOSPHATES