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Porosities and Diffusivities of Some Nonsorbing Species in Crystalline Rocks
Author(s) -
Skagius Kristina,
Neretnieks Ivars
Publication year - 1986
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr022i003p00389
Subject(s) - thermal diffusivity , fissure , coating , iodide , diffusion , mineralogy , materials science , geology , composite material , chemistry , thermodynamics , physics , organic chemistry
The diffusion of nonsorbing species in different rock materials and fissure coating materials has been studied on a laboratory scale. The nonsorbing species were iodide, Uranine, and Cr‐EDTA. The results show that the effective diffusivity of iodide in rock materials with fissure coating material is of the same magnitude as or higher than the effective diffusivity of iodide in rock materials without fissure coating material. The results also show that the variations in the rock material are too large to give one value of the diffusivity in a rock material from a certain area. The estimated effective diffusivity of iodide in rock materials without fissure coating material was found to be in the range 1 × 10 −14 m 2 /s to 70 × 10 −14 m 2 /s.