THE USE OF AMMONIUM PHOSPHOTUNGSTATE FOR THE ION-EXCHANGE SEPARATION OF RUBIDIUM AND CESIUM (in Russian)
A tremolithic asbestos belonging to the amphibole group was found to perform better than silica gel, glass wool, cellulose or cork in preparing a column impregnated with ammonium phosphotungstate for the separation of Cs and Rb. A glass column 5 mm internal dmameter and 30 mm high was filled with an asbestos suspension in 1 M NH/sub 4/ NO/sub 3/. The column was then treated wtth a 0.2 M solution of phosphotungstic acid followed by a 0.3 M solution of NH/sub 4/ NO/sub 3/. The phosphotungstate salt formed is retained strongly by the asbestos fibers. The Rb/sup 86/and Cs/sup 134/tracers were adsorbed onto the column from a 1.0 M HNO/sub 3/ solution. The Rb/sup 86/ tracer is first eluted with 1.0 M NH/sub 4/ NO/sub 3/, and Cs/sup 134/ is eluted with a 6.0 M NH/sub 4/NO/sub 3/ solution. A clear separation of Rb and Cs is obtained in 40 to 45 minutcs. Cs and Rb can also be separated b'.- tmpregnating the column with ammonium silicomolybdate, but since this salt is more soluble in NH/sub 4/NO/sub 3/ solution than ammonium phosphotungstate, it is slowly removed from the column during elution, Ammonium silicotungstate was also found to be unsuitable because of its high solubility in ammonium nitrate solutions, (TTT)
- Research Organization:
- Vernadskii Inst. of Geochemistry and Analytical Chemistry, Academy of Sciences, SSSR
- NSA Number:
- NSA-16-003074
- OSTI ID:
- 4832705
- Journal Information:
- Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 140
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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Related Subjects
ASBESTOS
CESIUM
CESIUM 134
CHEMISTRY
EFFICIENCY
FIBERS
IMPREGNATION
ION EXCHANGE
LEACHING
MOLYBDENUM OXIDES
NITRATES
NITRIC ACID
PHOSPHORUS OXIDES
RUBIDIUM
RUBIDIUM 86
SEPARATION PROCESSES
SILICON OXIDES
SOLUBILITY
SOLUTIONS
SUSPENSIONS
TRACER TECHNIQUES
TUNGSTATES
TUNGSTEN OXIDES