Removal of Phenylamine Using Advanced Oxidation Process by UV/Peroxy Disulphate from Waste Water

This study is focused on removing toxic aniline from wastewaters using an advanced oxidation process by UV/ peroxy disulphate. In this study, the effect of various parameters including pH (3-9), the level of radiation (ultraviolet 30-watt lamp, number 2-5), peroxy disulphate dose (0.02 – 0.08 mol/l), and the initial concentration (20 – 100 mg/l) at different contact times (10 – 60 min) on the efficiency of aniline removal in a laboratory reactor with UV lamps and in a batch mode, was studied. The results of this study showed that the efficiency of removing aniline decreased by increasing and decreasing pH from 5 (maximum efficiency = 66.6%, at pH= 5) and also by increasing the concentration of pollutants. But by increasing the amount of radiation and peroxy disulphate dosage (0.02 to 0.08 mol/l, the process efficiencies will be 46 to 82.8% after 60 min, respectively), and the efficiency increased. The efficiency of removing aniline in the combined process of UV/peroxy disulphate increased significantly by using peroxy disulphate and UV, individually (96%). In the process, the efficiency of removing aniline from wastewater was due to the production of UV effect on Peroxy disulphate and the production of strong oxidizing radicals. Therefore, due to the high performance and low-cost raw materials, this process can be used for removing resistant compounds from industrial sewages.