Review Article

Electrokinetics in Earth Sciences: A Tutorial

Figure 3

Electric double layer, first published in [81]. The solid mineral presented is the case of silica. At pH above the isoelectric point, the cations are adsorbed within the Stern layer; there is an excess of cations in the diffuse layer. The zeta potential is defined at the shear plane. The fluid flow creates a streaming current which is balanced by the conduction current, leading to the streaming potential.
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