A Review on Wastewater Treatment Containing Organic Pollutants Using Advance Oxidation Processes

Abstract

Advanced oxidation processes (AOPs) are the technologies that generally use the hydroxyl radicals, the ultimate oxidant for the remediation of organic contaminants in wastewater. These are highly effective novel methods speeding up the oxidation process. AOPs can combine with Fenton (H2O2/Fe2+), photo-Fenton (H2O2/UV/Fe2+), and electro-Fenton, heterogeneous photooxidation using titanium dioxide (TiO2/hv), singlet molecular oxygen process, singlet oxygen-photo-Fenton process, sonolysis, peroxidation combined with ultraviolet light (H2O2/UV), UV alone, UV/O3, UV/S2O8-2, UV/Chlorine, peroxone (O3/H2O2), peroxone combined with ultraviolet light (O3/H2O2/UV), O3/UV system, O3/TiO2/ H2O2 and O3/TiO2/Electron beam irradiation. Ozone (O3), catalyst or ultraviolet (UV) irradiation to offer a powerful treatment processes of wastewater. Future research should be focused on enhancing the properties of heterogeneous catalysts in AOPs. This review report of different AOPs utilized for the removal of various phenolic compounds and textile dyes in wastewater.