Kinetic study for photocatalytic degradation of Direct Red 23 in UV–LED/nano-TiO2/S2O82− process: Dependence of degradation kinetic on operational parameters

Present work involves the prospects of the kinetic study for photocatalytic degradation of Direct Red 23 using UV–LED/nano-TiO2/S2O82− procedure. Advantageously usages of UV–LEDs as illumination sources were collected to the advanced oxidation process in presence of immobilized nano-TiO2. Additionally, kinetic approach for various parameters in different conditions for decolorization has been studied. Results demonstrated that kinetic model of UV–LED/nano-TiO2/S2O82− process can effectively degrade DR23 dye with optimum conditions. A new kinetic model was suggested on the basis of intrinsic element reactions. The proposed kinetic model fairly resembled that dye decolorization was followed by the first order reaction.