Reduction kinetics of Np(VI) by -butyraldehyde in tributyl phosphate diluted with -dodecane

Ban, Yasutoshi; Asakura, Toshihide; Morita, Yasuji

Radiochimica Acta, 92(12), p.883 - 887, 2004/12

https://doi.org/10.1524/ract.92.12.883.55113

The reduction kinetics of Np(VI) by -butyraldehyde in 30%TBP solution diluted with -dodecane were analyzed by spectrophotometry. Based on the results of both -butyraldehyde and nitric acid concentration dependencies on the Np(VI) reduction reaction, the rate equation was obtained as -d[Np(VI)]/d = [-CHCHO][HNO][Np(VI)] where = (1.00.2) 10 Mmin at 294 1 K. The activation energy of the reaction was 76 5 kJ/mol. Redox equilibrium between Np(V) and N(VI), and reaction mechanism were discussed.