Precipitation methods of recovery of Tc-99 from soluble waste

Technical Report · Thu Aug 23 04:00:00 EDT 1984

OSTI ID:5440746

Bibler, J P; Wallace, R M

Once pertechnetate ion, TcO/sub 4//sup -/, has been isolated from other waste components, as in the solutions obtained by ion exchange, it is possible to chemically effect the recovery of more than 95% of the /sup 99/Tc by precipitation, either as the sulfide or as the oxide. In neutral solutions pertechnetate produces insoluble Tc/sub 2/S/sub 7/ when treated with sodium sulfide. In alkaline medium TcO/sub 4//sup -/ can be reduced by zinc amalgam or aluminum metal to TcO/sub 2/ which precipitates readily. Lesser yields (60-70%) of /sup 99/Tc are possible when reduction is carried out on neat supernate itself. Pure technetium metal can be recovered by final reduction of either Tc/sub 2/S/sub 7/ or TcO/sub 2/ using hydrogen at elevated temperatures.

• Research Organization: Savannah River Lab., Aiken, SC (USA). Technical Div.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 5440746
• Report Number(s): DPST-84-707; ON: DE86015723
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DATA
EXPERIMENTAL DATA
HIGH-LEVEL RADIOACTIVE WASTES
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MANAGEMENT
MATERIALS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PRECIPITATION
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
RADIOISOTOPES
RECOVERY
SEPARATION PROCESSES
TECHNETIUM 99
TECHNETIUM ISOTOPES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YEARS LIVING RADIOISOTOPES