Degradation of 2,4-dichlorophenoxyacetic acid in water by ozonehydrogen peroxide process

Abstract

This study reports an investigation into the degradation of 2,4-dichlorophenoxyacetic acid in bubble contactor column by OJH202 process, which is widely used as a principal advanced oxidation process. The degradation of 2,4-dichlorophenoxyacetic acid was studied under different H2O2/O3 molar ratio and pH value. Meanwhile, TOC removal was investigated both in distilled water and tap water. The influences of ozone transfer and consumed hydrogen peroxide were also discussed. The degradation products and oxidation intermediates were identified by GC-MS and LC-MS. A possible reaction mechanism was thus proposed.