ABSTRACT
The textile and apparel industry is a solid and relevant industry in many developed or developing countries, mainly in Asia. Colorants arise as target contaminants in textile wastewaters, because their presence is highly visible at very low concentrations, which negatively affects water transparency. Ozone is a powerful oxidant for wastewater treatment, used as a disinfection chemical or as an oxidant to remove color and odor. The H2 O2 oxidation of textile wastewater has been demonstrated to be ineffective at both acid and alkaline values. The combination of chemical oxidation using the Fenton reagent achieved partial removal of color and organic content (COD) of a textile industry effluent. Heterogeneous photocatalysis has been reported to perform the oxidation of the target organic contaminants within a short contact time without generating any other solid wastes. Oxidoreductases, such as laccases, have been used in oxidation processes such as dye decolorization because of their high activity, selectivity, and specificity.
