Study on TiO_2 -photocatalyzed degradation of phenol in suspending system

Kinetics of the photodegradation of phenol was studied in TiO2 aqueous suspensions under high pressure mercury lamp irradiation. The effects of initial concentration of phenol, the amount of catalyst, pH and light intensity on photodegradation of phenol were investigated. The experimental results indicated that the kinetics could be described by the Langmuir-Hinshelwood ( L - H) kinetic equation; the amount of catalyst, UV irradiation time, pH and light intensity were important parameters in the degradation process. The influencing sequence of these factors is obtained as; UV irradiation time pH light intensity the amount of catalyst.