期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：8
页码：2843-2851
出版社：University of Mohammed Premier Oujda
摘要：The main objective of this study was to investigate the degradation of Ceftriaxone with immobilized TiO 2 and ZnO as heterogeneous catalysts. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) was used to characterize the surface of both catalysts. Photodegradation was compared using direct photolysis (UV alone), TiO 2 /UV, and ZnO/UV processes in a photoreactor with high-pressure mercury lamp irradiation. Special attention was given to the influence of the initial concentration of Ceftriaxone, initial pH and light intensity (LI), on photodegradation processes. The results showed that photodegradation involving UV/TiO 2 process was more effective than that involving UV/ZnO process. Either of the experiments was performed in the same operational conditions of C 0 , light intensity, desired value of pH for both catalysts, and the apparent rate constant (k app ) appears to be about 0.022 min -1 for UV/TiO 2 process (pH = 5) and about 0.0081 min -1 for UV/ZnO process (pH = 8). For both systems, the photodegradation of Ceftriaxone followed the pseudo-first- order kinetics.
