| The radiolytic degradation of chlorophenols (CPs) in aqueous solutions by γ-radiation was studied. The effects of absorbed dose, different type of chlorophenol and their initial concentration on the degradation and dechlorination of CPs were investigated. The experimental results showed that γ-irradiation was able to degrade CPs in aqueous solution successfully, and the radiolytic degradation of CPs was in accordance with the pseudo-first-order kinetic model. When the initial concentration of CPs was 100 mg·L-1 and the radiation dose was 8 kGy, the removal efficiencies of 2-CP, 3-CP, 4-CP, 2,4-DCP were 68.0%, 97.5%, 89.7% and 100% respectively. The corresponding dechlorination efficiencies were 60.2%, 71.1%, 64.3% and 78.9%, respectively. The combination of radiation and O3/H2O2 resulted in a synergistic effect, which remarkably increased the degradation and mineralization efficiency of CPs. |
