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Influence of Operational Conditions on Retardation Parameters Measured by Diffusion Experiment in Compacted Bentonite

  • Ishii Yasuo (a1), Yoshimi Seida (a2), Yukio Tachi (a3) and Hideki Yoshikawa (a4)

Abstract

Influence of operation factors in diffusion test of compacted bentonite (such as agitation of test solution in the reservoir, feed rate of the test solution and mass transfer resistance in the filter) on the diffusion data was examined by reservoir depletion (RD) test method using Cs+. The influence of these factors on the diffusion data was also analyzed based on the mathematical sorption-diffusion model which considered the feed of test solution and mass transfer resistance in the filter as well. The reservoir depletion data showed some remarkable influences of these operational conditions, especially in the system with low ionic strength. Change in mass transfer resistance at filter-compacted bentonite due to the operational conditions was found to be potential factor which disturb the diffusion data. The influence was reduced in the system with high ionic strength of solution.

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1 Yaroshchuk, A. E. and Loon, L. R. Van, Journal of Contaminant Hydrology, 97, 67 (2008).
2 Tachi, Y., Yotsuji, K., Seida, Y., and Yui, M., in Scientific Basis for Nuclear Waste Management XXXIII, edited by Burakov, B. E. and Aloy, A. S., (Mater. Res. Soc. Symp. Proc. 1193, Warrendale, PA, 2009), pp 545552

Keywords

Influence of Operational Conditions on Retardation Parameters Measured by Diffusion Experiment in Compacted Bentonite

  • Ishii Yasuo (a1), Yoshimi Seida (a2), Yukio Tachi (a3) and Hideki Yoshikawa (a4)

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