Organics deterioration from aqueous solutions by electro-Fenton process

摘要

A MnO2-graphite electrode was used in the treatment of aqueous solution from phenolic compounds by an electro-Fenton process. The effect of operating conditions, i.e. current density and externally added Fe~(2+), on the efficiency of the electro-Fenton Process performance was investigated. The performance of the electro-Fenton process was estimated by the chemical oxygen demand (COD) removal percentage from the treated solution after 6 h elector-oxidation at 30 °C. Significantly, the removal increased with increasing the applied current density and Fe~2+) added, while the maximum removal percentage was achieved when ImM Fe~(2+) added and 8mA/cm~2 applied. Kinetic study of COD deterioration from the treated aqueous solution at the applied values of the operating parameters was carried out and the results were indicated that the COD decay over the MnO2-graphite anode by electro-Fenton process followed zero order kinetics. Current efficiency and specific power consumption of the process were also predicted.