2-Chlorophenol Removal of Aqueous Solution Using Advanced Oxidation Processes Resulting from Iron/ Persulfate and Ultra Violet/ Persulfate

Background: Advanced oxidation processes are used to remove toxic aromatic compounds with low biodegradability, such as 2chlorophenol. This study investigates the use of Sulfate (SO4) and persulfate (S2O82) radicals, as one of the advanced oxidation methods, to remove 2 chlorophenol from aquatic solutions. Materials and Methods: This experimental and pilotscale study was carried out using two chemical batch reactors one of the reactors equipped with UV ls and the other was on the hot plate. In Iron/ Persulfate (Fe/S2O82 ) and Ultra violet/ Persulfate (UV/S2O82 ) processes different parameters were investigated. Results: The results show that iron, UV, the initial pH of the solution, persulfate concentration have considerable effects on the elimination of 2chlorophenol in both processes. In both processes, the maximum elimination occurred in acidic conditions. The elimination efficiency increased by increasing the concentration of 2chlorophenol and UV intensity, and also by decreasing the concentration of persulfate and iron. Accordingly, in Iron/ persulfate and Ultra violet/ persulfate processes 2chlorophenol was eliminated with 99.96% and 99.58% efficiencies, respectively. Conclusion: Sulfate radicals which are produced from activated persulfate ions with hotFe ion and UV radiation have significant impact on the removal of 2chlorophenol. Therefore, the processes of Fe/S2O8^2- and UV/S2O8^2- can be regarded as good choices for industrial wastewater treatment plants operators in the future.