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Relative Flow Rates of Salt and Water in Soil
Author(s) -
Krupp H. K.,
Biggar J. W.,
Nielsen D. R.
Publication year - 1972
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1972.03615995003600030016x
Subject(s) - loam , porous medium , chemistry , flow velocity , mixing (physics) , soil water , retardation factor , volume (thermodynamics) , porosity , displacement (psychology) , salt (chemistry) , flow (mathematics) , mineralogy , chromatography , geology , soil science , thermodynamics , mechanics , column chromatography , psychology , physics , organic chemistry , psychotherapist , quantum mechanics
A hydrodynamic equation for the mixing of two miscible solutions in a porous media has been combined with the Gouy theory for ion distribution in soil pores in order to examine the effect of flow velocity and ion distribution in the pores on the breakthrough curves. The model considers zones of mobile and immobile solution in the porous media, and the extent these zones are affected by the total concentration of the solution and the pore water velocity. Miscible displacement experiments of 36 Cl and 3 H through Panoche clay loam at 0.1, 0.01, and 0.001 N total salt concentration using CaCl 2 were performed on the same column at a fast and slow flow velocity. It was shown that the exclusion volume for isotope and the separation volume for 36 Cl and 3 H increased as flow velocity decreased and these changes were related to the total ion concentration, the thickness of the diffuse double layer, and the zones of mobile and immobile solution.