Electrokinetic Phenomena

(redirected from Electrokinetic)
Also found in: Dictionary, Wikipedia.
Related to Electrokinetic: Electrokinetic potential

electrokinetic phenomena

[i¦lek·trō·kə′ned·ik fə′näm·ə·nə]
(physical chemistry)
The phenomena associated with movement of charged particles through a continuous medium or with the movement of a continuous medium over a charged surface.

Electrokinetic Phenomena


a group of effects that are observed in disperse systems and in capillaries and that entail either the movement of one phase relative to another under the influence of an applied electric field or the production of a potential difference in the direction of the relative movement of phases that is due to mechanical forces. Electroosmosis and electrophoresis are the electrokinetic phenomena of the first type; the production of a sedimentation potential, or the Dorn effect, and the production of a streaming potential are the electrokinetic phenomena of the second type.

Electrokinetic phenomena result from the existence, at a phase boundary, of excess charges that are grouped as two oppositely charged layers called an electrical double layer. An electric field applied in the direction parallel to a phase boundary causes the displacement of an ionic layer relative to another, resulting in the relative displacement of the phases, that is, in electroosmosis or electrophoresis. Effects that are the converse of electroosmosis or electrophoresis are similarly observed in the flow of a liquid or in the sedimentation of particles from a disperse phase. Such effects entail the relative movement of ionic layers or the spatial separation of charges in the direction in which the phases move. In other words, they entail the production of a streaming potential or the production of a sedimentation potential, respectively.

Any electrokinetic phenomenon may be used to determine the zeta potential, or electrokinetic potential, which is denoted ζ. In such a determination, the surface conductivity caused by the freely movable charges of an electrical double layer is assumed to be greater than the volume conductivity of a system.

The theory of electrokinetic phenomena, which was developed by M. Smoluchowski in 1903, establishes a linear relationship between the quantitative characteristics of such a phenomenon and those of the applied electric field. However, the theory does not take into account the departure of a double layer from equilibrium or the production of an induced dipole moment in dispersed particles. To take these effects into account, electrokinetic phenomena must be studied in conjunction with other electrical surface effects.


Dukhin, S. S. Elektroprovodnost’ i eleklrokineticheskie svoistva dispersnykh sistem. Kiev, 1975.
Dukhin, S. S., and B. V. Deriagin. Eleklroforez. Moscow, 1976.


References in periodicals archive ?
have studied the coupling characteristics of electrokinetic effects and polymer dynamics at strong screening limit based on a scaling law [12].
The aim of the present study was to investigate the behaviour of kaolinite-smectite mixtures subjected to mechanical and electrokinetic tests over a large range of smectite content.
This type of the schematic has been used in electrokinetic transducer.
He believes electrokinetic remediation may be a good alternative to traditional remediation techniques for environmentally sensitive areas such as wetlands or areas where it is especially important to protect a groundwater source.
Simultaneous determination of digoxin and digitoxin by micellar electrokinetic chromatography and application to drug formulations.
As one of the possible generation mechanisms of the co-seismic EM signals, electrokinetic effect, (33,34) which satisfies the Onsager reciprocal relation, (4) has been paid much attention.
Dewatering and ground strengthening Spin-out company, Electrokinetic Limited, headed up an eightpartner Technology Strategy Board Collaborative R&D programme, incorporating research input from Newcastle University, to develop the dewatering, waste reduction and ground consolidation potential of electrokinetic geosynthetics.
M2 EQUITYBITES-August 7, 2014-Meridian Bioscience partners with University of Tennessee Research Foundation to develop electrokinetic sensor technology
M2 PHARMA-August 7, 2014-Meridian Bioscience partners with University of Tennessee Research Foundation to develop electrokinetic sensor technology
Summary: An analyt ical procedure has been developed for t he det erminat ion of 5 guanidino compounds; guanidine (G), guanidinoacet ic acid (GAA), guanidinopropionic acid (GP A), guanidinobut yric acid (GBA), and guanidinosuccinic acid (GSA) by micellar electrokinetic capillary chromatography (MEKC) wit hin 5 min.
In cement suspensions there is a continuous chemical interaction of the dispersive environment and a disperse phase that leads to continuous change of rheological, adsorptive, electrokinetic and other properties of system.
Dynamic and electrokinetic behavior of erythrocyte membrane in diabetes mellitus and diabetic cardiovascular disease.