General Principle for Mixed Metal Contaminants

1 Theoretical Ionic Mobility and Major Affecting Coefficients [Pg.288]

The concepts of ionic mobility ui, m /s-V) and effective ionic mobility ( f, m /s-V) are introduced as representative parameters of electromigration (ionic migration). The effective ionic mobility defines the velocity of the ionic species under the effect of a unit electric field, which can be theoretically estimated using the Nemst-Townsend-Einstein relation (Holmes, 1962). Ionic mobility is related to the ionic valence (z,) and molecular diffusion coefficient (Z) m /s) of species as follows [Pg.288]

TABLE 14.1. Diffusion Coeflident, Ionic Mobility at Infinite Dilntion and Effective Ionic Mobility in Soil [Pg.289]

Metal Species Molecular Diffusion Coefficient, D, x 10 (m /s) Ionic Mobility, Mi X 10 (m /s V) Effective Ionic Mobility, MfxlO (m /s V) [Pg.289]

2 Adsorption Capacity and Affinity of Heavy Metals in Solid Matrix [Pg.289]