Abstract：Photocatalytic degradation of carbofuran has been investigated in TiO2 aqueous solution under UV irradiation. The effects of various parameters such as catalyst amount, pH value, concentration of carbofuran, reactive oxidative species (ROSs), different anions and metal cations on photocatalytic degradation kinetics were studied. The degradation of carbofuran follows pseudo first-order kinetics by using Langmuir-Hinshelwood model. The results indicated that the weak alkaline solution was favor for the degradation of carbofuran. The ?OH radical is responsible for the major degradation of carbofuran, and its contribution is about 93.4%, while the other ROSs play a minor contribution to the degradation. Additionally, the anions of BrO3- and S2O82- accelerate the degradation rate of carbofuran, while I- anion inhibits degradation reaction obviously. The photocatalytic degradation reactions were also inhibited to some extent when K+, Ca2+, Na+, Mg2+ and Cu2+ cations were added to aqueous solution.
