Comparison between Electrocoagulation, Electrochemical Fenton and Fenton processes for the treatment of dyes.

Abstract

Electrocoagulation with an iron anode, alone (EC) and combined with H2O2 (ECF), and the Fenton reaction, were studied as alternative treatments for the removal of two dyes, methylene blue (MB) and reactive black 5 (RB5), from aqueous solution. The effect of pH, [H2O2]0 and [Fe(II)] on the degradation rate (r) was analyzed, and both the electrical energy consumed (EEC) and the amount of final wastes generated (ENC, kg of Fe per kg of dye removed) were calculated.