Results and discussion
3.1. Mechanism of electrochemical treatment
Whole of the EC treatment involves a combination of various processes viz: electrolytic reactions at the electrode surface; formation of anodic metal and metal hydroxide cations in aqueous phase; adsorption of soluble or colloidal pollutants onto the surface of metal hydroxides; removal of pollutants by electroflotation, sedimentation and adhesion to bubbles.
During the EC process when current is passes to iron electrode, Fe2+ is released at the anode while at the cathode, hydrogen production occurs. Many reactions take place in the EC reactor with iron electrodes [23] and [24].
When current is applied across the electrode, at iron anode