Effect of Carbonate on the Migration Behavior of Lanthanides in Compacted Bentonite

Kazuya Idemitsu, Kazuyuki Fujii, Noriyuki Maeda, Yuki Kakoi, Noriya Okubo, Yaohiro Inagaki, Tatsumi Arima
  • MRS Advances, February 2018, Cambridge University Press
  • DOI: 10.1557/adv.2018.184

The migration behavior of Lanthanides in compacted bentonite

What is it about?

The apparent diffusion coefficients of La, Nd, Eu, Dy, Er, and Lu in compacted bentonites were investigated at various bicarbonate concentrations. The apparent diffusion coefficients of these lanthanides tended to decrease with increasing dry density. The effect of carbonate on the diffusion of lanthanides in bentonite differs depending on the atomic number of the lanthanide.

Why is it important?

The transport of radionuclides in compacted bentonite is mainly controlled by diffusion, and thus it is important to determine the diffusion coefficients of these radionuclides in various conditions.


Kazuya Idemitsu (Author)
Kyushu Daigaku

The authors would like to show that there is a possibility that high carbonate concentration places can be used as a radioactive waste disposal site.

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