Environmental Engineering Reference
In-Depth Information
Introduction to Electrokinetics
By George V. Chilingar, Mohammed Haroun, Hasan Shojaei,
and Sanghee Shin
1 Introduction
Electrokinetics is a term applied to a group of physicochemical phenomena
involving the transport of charges, action of charged particles, effects of
applied electric potential and fluid transport in various porous media to allow
for a desired migration or flow to be achieved. These phenomena include
electrokinetics, electroosmosis, ion migration, electrophoresis, streaming
potential and electroviscosity. These phenomena are closely related and
all contribute to the transport and migration of different ionic species and
chemicals in porous media. The physicochemical and electrochemical
properties of a porous medium and the pore fluid, and the magnitudes of
the applied electrical potential all impact the direction and velocity of the
fluid flow. Also, an electrical potential is generated upon the forced passage
of fluid carrying charged particles through a porous medium.
These electrokinetic effects have been recognized for a considerable
period of time, with the effects of electroosmosis and electroviscosity being
studied and evaluated by many researchers.
1
Search WWH ::
Custom Search