Extraction Kinetics of Technetium(Ⅶ) Between TBP-Kerosine and Nitric Acid Medium
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Graphical Abstract
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Abstract
The extraction kinetic behaviors of technetium in TcO4-/HNO3/TBP-kerosine, TcO4-/HNO3-Zr/TBP-kerosine, TcO4-/HNO3-U/TBP-kerosine and TcO4-/HNO3-Zr-U/TBP-kerosine system were studied with a mini-sized Lewis cell. The extraction kinetic equations and apparent rate constants of TcO4- in these systems were calculated and the mechanism was discussed in this paper. In these systems, the rate of the extraction of Tc(Ⅶ) declines with the rise of temperature, and the apparent active energy is turned out to be minus value.
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