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Ionic Interaction in Diffusion
Author(s) -
Frere M. H.
Publication year - 1969
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/sssaj1969.03615995003300060025x
Subject(s) - diffusion , ion , ionic bonding , constant (computer programming) , fick's laws of diffusion , chemistry , analytical chemistry (journal) , thermodynamics , chemical physics , physics , chromatography , computer science , organic chemistry , programming language
Analysis of the system of a plant root taking up ions at a constant rate shows that the apparent diffusion coefficient of each ion can change with time, distance from the root, composition of the solution, and the rates of uptake of all the ions. A numerical method, developed to include the electrical interaction of ions during diffusion, was used to simulate the concentration behavior in a sand culture. It is concluded that the assumption of constant diffusion coefficients in models of soil‐plant system can only be a first approximation.