Zeta Potential of Soil Particle Surfaces

4 CHANGE OF ZETA POTENTIAL OF SOIL PARTICLE SURFACES 

When a DC electric field is imposed on the soil, it will move the mobile cation shell toward the cathode and drag the fluid between the shearing surfaces by a plug flow mechanism, resulting in the electroosmotic flow of fluid from the anode toward the cathode. The shearing surface in the fluid may be taken as a plane parallel to the surface at a distance 5 (m) from it. If e (F/m) is the permittivity of the fluid between these hypothetical plates, then it is known from electrostatics that 

The particular geochemical process of change of zeta potential of soil particle surfaces as a function of soil pH and pore fluid chemistry poses significant complexity to 

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