Oxidation of aqueous chlorophenols with photo-Fenton process

Research of 2,4-chlorophenol and 2,4,6-trichlorophenol in aqueous solution using the photo-Fenton process was conducted in two parts. The first part of the study explored the treatment efficiency and reaction rate expression of 2,4-chlorophenol and 2,4,6-trichlorophenol. With respect to the simulated experimental data, the relationship between the reaction rate for 2,4-chlorophenol and 2,4,6-trichlorophenol and H2O2 concentration was expressed as a first-order reaction and that between the reaction rate and the Fe(II) concentration was a saturation-type reaction. In the second half of this study, chlorohydroquinone, catechol, dichlorocatechol, and dichlororesorcinol were found in the photo-Fenton process by GC/MS. Some of these identified intermediates were more toxic than the primary compound.