Recovery of Noble Metals and Technetium from Nuclear Waste
Conference
·
OSTI ID:21208554
- Korea Atomic Energy Research Institute, PO Box 105 Yuseong, Daejeon, 305-600 (Korea, Republic of)
- Hannam University, Ojung, Daeduk, Daejeon, 306-791 (Korea, Republic of)
An adsorptive separation of Pd, Rh and Tc was tested by using simulated chemical solutions. Pd(NO{sub 3}){sub 2} and Rh(NO{sub 3}){sub 3} were used for the noble metal sources, and Re 203 after dissolving it in 0.5 M nitric acid was used for the technetium substitute, respectively. A felt type ACF (activated carbon fiber) after being pretreated with 1 M NaOH, and an EIR (extractant impregnated resin) which was prepared by impregnating Aliquat 336 onto Amberlite XAD-4 resin were evaluated on their adsorption equilibrium and kinetic performances. As the results, the ACF showed a high selectivity for the palladium ions over the rhodium and rhenium ions. On the other hand, the EIR was shown to be effective for separation of rhenium from the palladium-free two component system of rhenium and rhodium. Column tests were also performed to confirm the separation efficiency of palladium and rhenium using a jacketed glass column (diam. 11 x L 150). The ACF bed showed the complete separation of palladium from rhenium and rhodium. The breakthrough volume, when 1% of breakthrough is considered, was about 140 BV for palladium, while only a small amount of an adsorption of rhenium and rhodium were found in the column. Then the EIR column was applied to separate rhenium from rhodium and showed successful separation performance with about 122 BV of breakthrough volume. The palladium and rhenium with high purity were recovered effectively by eluting the beds with nitric acid. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 13023, Tucson, AZ, 85732-3023 (United States)
- OSTI ID:
- 21208554
- Report Number(s):
- INIS-US--09-WM-06010
- Country of Publication:
- United States
- Language:
- English
Similar Records
Separation of Technetium in Nitric Acid Solution With an Extractant Impregnated Resin
Recovery of plutonium from nitric acid waste
Separation of water-ethanol mixtures by sorption, Part 2
Conference
·
Sat Jul 01 00:00:00 EDT 2006
·
OSTI ID:20995536
Recovery of plutonium from nitric acid waste
Technical Report
·
Sat Dec 20 23:00:00 EST 1986
·
OSTI ID:6606080
Separation of water-ethanol mixtures by sorption, Part 2
Technical Report
·
Sat Jan 31 23:00:00 EST 1981
·
OSTI ID:6661660