Abstract
Infrared absorption spectra of HNO3 solutions in UO2(NO3)2(TBP)2 have been taken. The formation of a hydrogen bond between HNO3 and nitrate or phosphoryl group in UO2(NO3)2(TBP)2 has been established. On extracting Pu(IV) and Np(IV) by 30% TBP-dodecane, dependence of the distribution coefficients on concentration has been found at UO2(NO3)2 concentrations in the aqueous phase upwards from 0.4M. This dependence appeared in the temperature interval 0–60°C. Such effects may be caused by ordered structure of saturated uranyl nitrate solutions in TBP.
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Zilberman, B.Y., Fedorov, Y.S. Interaction of nitric acid and tetravalent actinides with uranium in TBP-phase. Journal of Radioanalytical and Nuclear Chemistry, Articles 143, 373–379 (1990). https://doi.org/10.1007/BF02039605
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DOI: https://doi.org/10.1007/BF02039605