Photocatalytic Degradation of Procion Yellow Die

Abstract

Since the beginning of industrialization, the variety and quantity of pollutants emitted into the environment has steadily increased. While the rates of development and waste production are not likely to diminish, efforts to control and dispose of wastes are rising. Textile wastewaters consist of an amalgam of dyes, surfactants, and additives that are acquired throughout the application processes. Because of the extensive variation in type and distribution of chemicals found in the effluents, no single, comprehensive method of treatment has been developed. Studies have shown some chemical and physical techniques (coagulation, ultra filtration, and reverse osmosis) in effectively removing certain dyes from wastewater however, these systems merely transfer the dye from one form of waste to another (e.g. liquid to solid), and therefore cannot be considered as a complete treatment of the waste. An alternative mode of pollutant treatment is photocatalytic oxidation. This advanced oxidation process entails illuminating a photocatalyst (typically titanium dioxide, TiO2) with a particular wavelength of light to generate radicals; these radicals will subsequently oxidize the organic pollutants to CO2 and H2O. These processes frequently include the addition of oxidizing agents in the presence of a Catalyst or UV light. These types of processes are collectively called as advanced oxidation processes (AOP’s). The principal mechanism of AOP’s function is the generation of highly reactive free radicals. TiO2 has been demonstrated to be excellent catalyst and its behavior is well documented in theliterature. Photo degradation of Procion yellow dye was performed in specially designed reaction vessel in the photo reactor equipped with UV tubes and constant stirring of solution was ensured at constant temperature. The comparing study of TiO2 & ZnO as a catalyst for the degradation of Procion Yellow Dye was performed. Experiments were performed in slurry mode in both UV and solar light at optimized processes parameter. Various parameters like catalyst dose, pH, effect of UV/solar, initially dye concentration was varied and their effects have been analyzed. Since the beginning of industrialization, the variety and quantity of pollutants emitted into the environment has steadily increased. While the rates of development and waste production are not likely to diminish, efforts to control and dispose of wastes are rising. Textile wastewaters consist of an amalgam of dyes, surfactants, and additives that are acquired throughout the application processes. Because of the extensive variation in type and distribution of chemicals found in the effluents, no single, comprehensive method of treatment has been developed. Studies have shown some chemical and physical techniques (coagulation, ultra filtration, and reverse osmosis) in effectively removing certain dyes from wastewater however, these systems merely transfer the dye from one form of waste to another (e.g. liquid to solid), and therefore cannot be considered as a complete treatment of the waste. An alternative mode of pollutant treatment is photocatalytic oxidation. This advanced oxidation process entails illuminating a photocatalyst (typically titanium dioxide, TiO2) with a particular wavelength of light to generate radicals; these radicals will subsequently oxidize the organic pollutants to CO2 and H2O. These processes frequently include the addition of oxidizing agents in the presence of a Catalyst or UV light. These types of processes are collectively called as advanced oxidation processes (AOP’s). The principal mechanism of AOP’s function is the generation of highly reactive free radicals. TiO2 has been demonstrated to be excellent catalyst and its behavior is well documented in the literature. Photo degradation of Procion yellow dye was performed in specially designed reaction vessel in the photo reactor equipped with UV tubes and constant stirring of solution was ensured at constant temperature. The comparing study of TiO2 & ZnO as a catalyst for the degradation of Procion Yellow Dye was performed. Experiments were performed in slurry mode in both UV and solar light at optimized processes parameter. Various parameters like catalyst dose, pH, effect of UV/solar, initially dye concentration was varied and their effects have been analyzed.