Photocatalytic Degradation of Industrial Printing and Dyeing Wastewater with Rice Husk-Based Porous Carbon Supported Titanium Dioxide

Abstract

China has become the world's largest country in the printing and dyeing industry. It is of great practical significance to research and explore effective methods and techniques for treating printing and dyeing wastewater for protecting the water environment and promoting the sustainable development of economy, society and environment. Based on the above background, the purpose of this study is the photocatalytic degradation of industrial printing and dyeing wastewater with rice husk-based porous carbon supported titanium dioxide. In this study, nano-TiO2/AC photocatalyst was prepared by sol-gel method, and the effect and mechanism of removal of methylene blue by TiO2/AC photocatalyst were investigated. The experimental results show that the activated carbon carrier improves the photodegradation efficiency of TiO2. When TiO2 is 0.5 g/L and AC is 0.2 g/L, the photocatalyst has the best photodegradation effect on methylene blue solution; with the initial concentration of methylene blue solution As the temperature rises, the efficiency of catalyst adsorption and photocatalytic degradation decreases. The effect of the three anions on the photocatalytic efficiency is NO3->SO42->Cl-.