Diffusion of uranium in compacted sodium bentonite

Arto Muurinen

Research output: Contribution to journalArticleScientificpeer-review

22 Citations (Scopus)

Abstract

Sorption and diffusion of uranium in sodium bentonite MX-80 were measured in aerobic conditions. The batch method was used for the sorption measurements and the steady state method for the diffusion measurements. Clear sorption was noticed only when high uranium concentrations were used so that the pH of the solution decreased.

The diffusivities of uranium were strongly dependent on the compaction of bentonite so that in the highly compacted samples the diffusion was very restricted. Uranium shows both features of ion-exclusion and sorption. Further studies are, however, needed to explain the diffusion mechanisms of uranium.
Original languageEnglish
Pages (from-to)359-367
JournalEngineering Geology
Volume28
Issue number3-4
DOIs
Publication statusPublished - 1990
MoE publication typeA1 Journal article-refereed

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Bentonite
bentonite
Uranium
uranium
Sodium
sodium
Sorption
sorption
oxic conditions
diffusivity
compaction
Compaction
ion
Ions
method

Cite this

Muurinen, Arto. / Diffusion of uranium in compacted sodium bentonite. In: Engineering Geology. 1990 ; Vol. 28, No. 3-4. pp. 359-367.
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Diffusion of uranium in compacted sodium bentonite. / Muurinen, Arto.

In: Engineering Geology, Vol. 28, No. 3-4, 1990, p. 359-367.

Research output: Contribution to journalArticleScientificpeer-review

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PY - 1990

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N2 - Sorption and diffusion of uranium in sodium bentonite MX-80 were measured in aerobic conditions. The batch method was used for the sorption measurements and the steady state method for the diffusion measurements. Clear sorption was noticed only when high uranium concentrations were used so that the pH of the solution decreased.The diffusivities of uranium were strongly dependent on the compaction of bentonite so that in the highly compacted samples the diffusion was very restricted. Uranium shows both features of ion-exclusion and sorption. Further studies are, however, needed to explain the diffusion mechanisms of uranium.

AB - Sorption and diffusion of uranium in sodium bentonite MX-80 were measured in aerobic conditions. The batch method was used for the sorption measurements and the steady state method for the diffusion measurements. Clear sorption was noticed only when high uranium concentrations were used so that the pH of the solution decreased.The diffusivities of uranium were strongly dependent on the compaction of bentonite so that in the highly compacted samples the diffusion was very restricted. Uranium shows both features of ion-exclusion and sorption. Further studies are, however, needed to explain the diffusion mechanisms of uranium.

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JO - Engineering Geology

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