Photo-Degradation of Chlorophenols (CPs) in aqueous solution by UV/Fenton's reagent (Fe2+ and H2O2) was investigated in the present study. Experiments were conducted in a batch reactor, at pH 3.5 for 2-CP and pH 4 for 2,4-DCP and at 273C with a source of UV light. The effects of different reaction parameters such as initial 2-CP and 2,4-DCP concentration, pH of solution, iron concentration, hydrogen peroxide concentration, on the oxidative degradation of selected chlorophenols were investigated. Final concentration, pH and COD of the solution after treatment were determined to know degree of...