关键词: 光催化, 降解, 废水, 动力学, 盐效应

Abstract: Nanometer TiO2 dispersed in water was used as photocatalyst in a self-designed bubbling fluidized bed photocatalytic reactor （BFBPR）. Photocatalytic degradation kinetics of reactive turquoise blue K-GL in BFBPR was investigated by considering the dosage of photocatalyst，initial dye concentration，ionic strength of NaCl and Na2SO4. Furthermore，the Langrmuir-Hinshelwood kinetics equation was used to describe the photocatalytic degradation kinetics of dye K-GL. The photocatalytic degradation of reactive turquoise blue K-GL reaction followed a pseudo-first order kinetics equation，and the apparent reaction rate coefficient decreased with increasing initial dye concentration. The optimal catalyst amount was 0.122g/L. Addition of Na2SO4 promoted photocatalysis of K-GL at lower dye concentrations with the optimal addition of 0.104mol/g. In addition，the apparent reaction rate coefficient increased with increasing addition of Na2SO4，while the photocatalysis was inhibited with increasing addition of NaCl.

Key words: photocatalysis, degradation, waste water, kinetics, salt effect