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Sedimentation potential occurs due to dispersed particles motion relative to the fluid under influence of either gravity or centrifugation. This motion disrupts equilibrium symmetry of the particles double layer. Enveloping viscous flow around the particles drags ions of the diffuse layer away from the particles. This causes slight displacement between surface charge and electric charge of the diffuse layer. Particle gains dipole moment. These dipole moments generate electric field that is called sedimentation potential. It can be measured for electric open circuit.
Additional recommended knowledge
There is also notion of sedimentation current. It is electric current generated by sedimentation potential for electric short circuit
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Sedimentation_potential". A list of authors is available in Wikipedia.|