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Title

2-CHLOROPHENOL REMOVAL OF AQUEOUS SOLUTION USING ADVANCED OXIDATION PROCESSES RESULTING FROM IRON/ PERSULFATE AND ULTRA VIOLET/ PERSULFATE

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Abstract

 Background: Advanced oxidation processes are used to remove toxic aromatic compounds with low biodegradability, such as 2- chlorophenol. This study investigated the use of sulfate (SO4-) and PERSULFATE (S2O8 2-) radicals, as one of the advanced oxidation methods, to remove 2-CHLOROPHENOL from aquatic solutions.Methods: This experimental and pilot-scale study was carried out using two chemical batch reactors; one of the reactors equipped with UV lamps and the other was on the hot plate. In IRON/ PERSULFATE (Fe/S2O8 2-) and ultra violet/ PERSULFATE (UV/S2O8 2-) processes different parameters were investigated.Results: IRON, UV, the initial pH of the solution, PERSULFATE concentration have considerable effects on the elimination of 2-CHLOROPHENOL in both processes. In both processes, the maximum elimination occurred in acidic conditions. The elimination efficiency was increased by increasing the concentration of 2-CHLOROPHENOL and UV intensity, and also by decreasing the concentration of PERSULFATE and IRON. Accordingly, in IRON/ PERSULFATE and ultra violet/ PERSULFATE processes 2-CHLOROPHENOL was eliminated with 99.96% and 99.58% efficiencies, respectively.Conclusion: Sulfate radicals produced from activated PERSULFATE ions with hot-Fe ion and UV RADIATION have significant impact on the removal of 2-CHLOROPHENOL. 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.

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