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Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
Published on: March 18, 2012
[The relative importance of different oxidants in the degradation process of quinoline using O3/UV]
Xiaomao Wang1, Xia Huang, Hongying Hu
1Environment Simulation and Pollution Control State Key Joint Laboratory, Dept. of Environ. Sci. & Eng., Tsinghua University, Beijing 100084, China.
Abstract:
In this paper the relative importance of different oxidants in the degradation process of quinoline using O3/UV was studied. O3 and .OH played the most important roles in removing quinoline. Their concentrations were measured using indigo method and .OH-probe compound (p-CBA) method respectively, and the relative importance of these two oxidants was quantitatively determined. The second-order reaction rate constant between quinoline and hydroxyl radical was calculated as 6.65 x 10(9) mol.(L.s)-1. In the present experimental condition, .OH and O3 oxidations contributing to the total degradation rate of quinoline were 88% and 12% respectively. Increasing the hydroxyl radical concentration will help to improve the total removal rate of quinoline.
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