The effects of matrix diffusion on radionuclide migration in rock column experiments

Pirkko Hölttä (Corresponding Author), Martti Hakanen, Aimo Hautojärvi, Jussi Timonen, Kusti Väätäinen

Research output: Contribution to journalArticleScientificpeer-review

22 Citations (Scopus)

Abstract

Rock column experiments were performed to examine the effects of matrix diffusion and hydrodynamic dispersion on the migration of radionuclides at the laboratory scale.
Tritiated water and chloride transportation was studied in intact mica gneiss and in altered more porous tonalite columns with narrow flow channels. The column diffusion properties were estimated prior to water flow experiments using the gas diffusion method with helium as the tracer gas. The numerical compartment model for advection and dispersion, with and without matrix diffusion, was used to interpret the tracer transport in the columns.
Matrix diffusion behavior was also distinguished from dominating hydrodynamic dispersion in rock column experiments at the slowest water flow rates.
Original languageEnglish
Pages (from-to)165-173
JournalJournal of Contaminant Hydrology
Volume21
Issue number1-4
DOIs
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed
EventProceedings of Fourth International Conference on Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere - Charleston, SC, United States
Duration: 12 Dec 199317 Dec 1993

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