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Full-Text Articles in Physical Sciences and Mathematics
Cation Exchange And Transport In Soil Columns Undergoing Miscible Displacement, Sung-Ho Lai
Cation Exchange And Transport In Soil Columns Undergoing Miscible Displacement, Sung-Ho Lai
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A mathematical model was developed to predict the exchange of one cation by another in a soil column undergoing one dimensional cation solution displacement under steady state flow conditions. The model allowed prediction of both the solution and exchanger phase concentration of the cation in question.
The model consists of a material balance equation which is a parabolic type partial differential equation. The assumption was made that equilibrium was reached instantaneously between the cations in the solution phase and the exchanger phase. This assumption reduced the material balance equation to a form that allowed numerical solution providing the data concerning …
A Field Study Of Miscible Displacement In Saturated Soils, Lloyd Dowley Mcfadden Sadler
A Field Study Of Miscible Displacement In Saturated Soils, Lloyd Dowley Mcfadden Sadler
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Extensive research has been carried out in both field and laboratory to explain water and solute movement under both saturated and unsaturated conditions. The importance of such work is obvious, since any attempt at exploring land reclamation by leaching or nutrient movement in plant feeding (to name only two) is subject to interpretations and theories of moisture flow.
Water flow through soil during reclamation by leaching can be termed miscible displacement since soil water and leaching water do not have a distinct fluid-fluid interface and will physically mix. It is probable that miscible displacement investigations can contribute to an understanding …