title: [Kinetic study on the photo-catalytic degradation of reactive brilliant X-3B by UVC and UVA].
abstract: Different wavelengths of UV light source were studied for the degradation of reactive brilliant red X-3B to reveal the function of wavelengths in photo-catalytic oxidation. The results showed that there were simultaneous photo-oxidation and photo-catalytic oxidation reactions for reactive brilliant red X-3B under ultraviolet light irradiation (254 nm), while under ultraviolet light irradiation (365 nm), there were only photo-catalytic reactions. The degradation of X-3B followed apparent first-order kinetics under 365 nm ultraviolet light irradiation, it also could be depicted by formulation of L-H model more precisely, while under 254 nm ultraviolet light irradiation, it followed apparent second-order kinetics. Compared with the degradation half-life of 365 nm light, the degradation half-life of brilliant red X-3B in 254 nm light decreased from 37.263 min to 0.855 min, indicating that the light quantum efficiency of short-wave UV was higher than that of the long-wave UV.
authors.affiliation: Engineering Research Center for Clean Production of Textile Printing and Dyeing, Ministry of Education, Wuhan Textile University, Wuhan 430073, China. jun_yang@wtu.edu.cn
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Lian
authors.initials: L
authors.lastname: Liu
authors.forename: Qing-Fu
authors.initials: QF
authors.lastname: Zeng
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000302:isolation & purification; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification; D007700:Kinetics; D009282:Naphthalenesulfonates / Q000737:chemistry* / Q000302:isolation & purification; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D010782:Photolysis / Q000528:radiation effects*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; C520101:Reactive brilliant red X-3B; D014874:Water Pollutants, Chemical