This is due to the fact that the power supply is pushing electrons from the anode to the cathode by keeping a constant voltage. The acid species desorbs contaminants from the surface of soil particles. Many different types of transport processes result due to the use of an electric current. These types of transport processes make possible the removal of some contaminants. Electroosmosis is the flow of water in the system due to the current.
Electrophoresis is the flow of charged particles.
The excess of negative charges in the soil results in attraction of excess of cations close to the surface. When a current is applied the excess cations close to the surface move towards the cathode. There are certain parameters to measure in the electrochemical soil processes. These parameters can give an idea about the ecological changes that affect the different microoganisms due to the current electrokinetic processes. It is important to keep track of these parameters because they are being influenced by the content of the soil and by how the soil reacts to the current.