Advanced Oxidation Processes for Removal of Dyes from Aqueous Media

WOS: 000449998200004Dyes are synthetically aromatic compounds used in various industries such as textile, plastics, pharmaceutical, paper, paint and food. The quality and quantity of wastewaters from these industries are a matter of concern for human health and environmental pollution. Different conventional methods have been developed for dye removal. However, due to the complex structure and recalcitrant nature of dyes, these methods appear to be ineffective in their complete removal. Advanced Oxidation Processes (AOPs) have been considered as a promising alternative to treat wastewater containing dye residues. These processes are based on the production of highly reactive radicals, especially hydroxyl radicals, which promote destruction of the target pollutant until mineralization. This chapter addresses AOPs for removal of dyes from aqueous media by presenting background on advanced oxidation processes. The AOPs will be investigated in two categories: Nonphotochemical and Photochemical Processes. Among these processes, the main focus will be on ozonation, Fenton's reagent oxidation, wet air oxidation and photocatalytic oxidation, with only brief information given on electrochemical oxidation, ultraviolet irradiation and hydrogen peroxide (UV/H2O2) and photocatalytic ozonation (UV/O-3) processes