92168.pdf

Particle surface

Stern plane

Surface of shear

Diffuse layer

Stern layer

1 /K Distance

Figure 7.2 Schematic representation of the structure of the electric double layer

according to Stern's theory

Figure 7.3 (a) Reversal of charge due to the adsorption of surface-active or
polyvalent counter-ions, (b) Adsorption of surface-active co-ions