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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
Np 함유TBP 유기상으로부터NBA에의한Np의환원역추출
Reductive stripping of Np using a n-butyraldehyde from a loaded TBPphase containing Np
Abstract
The reductive stripping of Np using a n-butyraldehyde (NBA) from loaded organic solutioncontaining Np, which was oxidative-extracted in a system of a 30 % TBP/NDD-2M HNO3andO/A=2 containing 0.005 M K2Cr2O7as an oxidant of Np, was studied. The stripping yields of Npwas increased with an increasing the NBA concentration, with a decreasing the nitric acidconcentration of stripping solution and with a decreasing the reaction temperature. The apparentreductive stripping rate equation was shown by the following equation : -d[Np]Org./dt= 1,524 exp(-2,906/T ) [NBA]0.91[H+]-0.92[Np]Org.At 1.04 M NBA and 2 M HNO3, the stripping yield of Np andU was 70.1 %, and 7.1 %, respectively, and the separation factor of U over Np (=DU/DNp) wasabout 30.4. Therefore, it was found that U and Np co-extracted in a system of TBP-HNO3could beeffectively mutual-separated by the NBA.
Neptunium, TBP, NBA, Extraction/stripping, Oxidation/Reduction, Kinetics, Np, TBP, NBA, 산화/환원, 추출/역추출, 반응속도.
Reference
JNFCWT
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Waste Society (KRS)
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