Kinetics of quinoline degradation by O3/UV in aqueous phase

The kinetics of quinoline degradation by O3/UV in aqueous phase was studied in this paper. It was found that the stoichiometric factor for the number of ozone molecule consumed by per quinoline molecule was 1. The second-order rate constants at 15 °C for the direct reaction of quinoline with ozone and that for the reaction of quinoline with √OH were determined to be 51.0 and 7.24 × 109 M−1 s−1, respectively. In O3/UV reaction system, √OH was the more important oxidant to degrade quinoline than ozone. For a comparison, in O3 reaction system, the relative importance of the two oxidants depended on the pH value greatly. To make the degradation of quinoline more practical, improvement of the concentration of √OH is more feasible.