Purification of polonium-210 using pyrochemical extraction
Description
An efficient extraction process that does not utilize halides or organic solvents has been developed for the recovery and purification of 210Po. Polonium-210, produced in bismuth metal by neutron irradiation, is extracted from molten bismuth metal into molten NaOH in an unique 3-compartment contactor under an inert atmosphere. At a temperature of 450+-250C, and at a NaOH/Bi weight ratio of 0.044, five successive 60-minute extractions remove > 96% of the 210Po. Following phase separation and freezing, additional purification steps include dissolution of the solidified NaOH in HNO3, recovery of 210Po from this solution by MnO2 carrier precipitation, dissolution of the precipitate by H2O2 in HNO3, and , finally, electrodeposition of 210Po onto platinum gauze
Additional details
Publishing Information
- Journal Title
- Sep. Sci. Technol.
- Journal Volume
- 15
- Journal Issue
- 4
- Series
- Sep. Sci. Technol.
- Journal Page Range
- 987-997
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 12581872
- Subject category
- S07: ISOTOPES AND RADIATION SOURCES;
- Descriptors DEI
- BISMUTH; ELECTRODEPOSITION; HIGH TEMPERATURE; HYDROGEN PEROXIDE; MANGANESE OXIDES; NITRIC ACID; PLATINUM; POLONIUM 210; PRECIPITATION; PURIFICATION; SODIUM HYDROXIDES; SOLVENT EXTRACTION
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ALPHA DECAY RADIOISOTOPES; CHALCOGENIDES; DAYS LIVING RADIOISOTOPES; DEPOSITION; ELECTROLYSIS; ELEMENTS; EVEN-EVEN NUCLEI; HEAVY NUCLEI; HYDROGEN COMPOUNDS; HYDROXIDES; INORGANIC ACIDS; ISOTOPES; MANGANESE COMPOUNDS; METALS; NITROGEN COMPOUNDS; NUCLEI; OXIDES; OXYGEN COMPOUNDS; PEROXIDES; PLATINUM METALS; POLONIUM ISOTOPES; RADIOISOTOPES; SEPARATION PROCESSES; SODIUM COMPOUNDS; SURFACE COATING; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS