Determination of the Diffusion Coefficients of Americium and Uranium in the Process of Their Sorption on a Solid-Phase Extractant Based on TODGA
https://doi.org/10.56304//S2304487X20040070
Abstract
It has been shown that the sample with the highest kinetic characteristics can be determined from the calculation and comparison of the values of the diffusion coefficients of americium-241 and uranium on the example of their sorption from a model solution of liquid radioactive waste using various experimental samples of solid-phase extractant based on TODGA.
The diffusion coefficients of americium-241 and uranium during their sorption have been calculated for three experimental samples of solid-phase extractant based on TODGA. The dependence of the reaction rate on the diffusion coefficients has been estimated. An increased sorption rate for americium-241 in comparison with uranium has been calculated from the dependence of the diffusion coefficients on the characteristics of the experimental samples of solid-phase extractant based on TODGA. Prototype no. 2 of solid-phase extractant based on TODGA with the highest kinetic characteristics has been determined from the calculation of the diffusion coefficients of americium-241 and uranium. The possibility of reducing the volume and costs of sorption experiments with preliminary determination of diffusion coefficients has been shown.
About the Authors
A. A. Savelev
All-Russia Research Institute of Chemical Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
115409
Moscow
N. V. Klochkova
All-Russia Research Institute of Chemical Technology
Russian Federation
Russian Federation
115409
Moscow
V. I. Rachkov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
115409
Moscow
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Review
For citations:
Savelev A.A., Klochkova N.V., Rachkov V.I. Determination of the Diffusion Coefficients of Americium and Uranium in the Process of Their Sorption on a Solid-Phase Extractant Based on TODGA. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2020;9(4):293-297. (In Russ.) https://doi.org/10.56304//S2304487X20040070
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