Insight into the degradation of different classes of dyes by advanced oxidation processes; a detailed review

Dyes are used as colouring agents in the form of natural and synthetic compounds. The textile and dye industries have discharged several forms of hazardous residual dyes into the environment. Many conventional contaminated water recycling processes only concentrate pollutants rather than degrading or eliminating them. One of the most suitable tactics for dye degradation from aqueous solutions is advanced oxidation processes (AOPs) such as Fenton, photo-Fenton, ozone treatment, photocatalytic degradation, UV photolysis, Wet air oxidation (WAO), and electrochemical oxidation. These AOPs have also been chosen for the degradation of a variety of dyes that are resistant to traditional methods. Mineralisation occurs as a result of chemical interactions between many reactive species generated and the dyes. The current work provides a comprehensive picture of the mechanistic properties of numerous AOPs and their potential for improving degradation efficiency through the enhancement process. In terms of degradation, this study analyzes the efficacy of numerous Advanced Oxidation Processes (AOPs) for the degradation of dyes. This paper examines the efficacy of several modern oxidation procedures that produce hydroxyl radicals for the degradation of dye.