Degradation of 4-chlorophenol by sunlight using catalyst of zinc oxide

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1 Downloaded from jmums.mazums.ac.ir at on Wednesday July th Degradation of 4chlorophenol by sunlight using catalyst of zinc oxide RamazanAli DianatiTilaki, MohammadAli Zazoli, Jamshid Yazdani, Mahdieh Alamgholilu, Ehsan Rostamali Associate Professor, Department of Environmental ealth Engineering, ealth Sciences Research Center, School of ealth, Mazandaran University of Medical Sciences, Sari, Iran Assistant Professor, Department of Biostatistics, School of ealth, Mazandaran University of Medical Sciences, Sari, Iran MSc Student of Environmental ealth Engineering, Student Research Committee, School of ealth, Mazandaran University of Medical Sciences, Sari, Iran Received November, ; Accepted ebruary, 4 Abstract Background and purpose Chrophenols represent one of the most abundant toxic compounds of industrial which are resistant to biodegradation and persist in the environment for long time. Sunlight is the source of many photochemical reactions. The present study aimed to determine degradation of 4chlrophenol as persistent organic compound by sunlight in the presence of zinc oxide as a catalyst. Materials and methods This study was performed in batch conditions. Determined amount of catalyst was added to defined volume of 4chlorophenol solution which was adjusted p. Effects of parameters such as ZnO loading, P, and contact time were investigated. The remaining concentrations of 4chlorophenol were analyzed by PLC highperformance liquid chromatography. Results The results showed that sunlight in present of zinc oxide as nanocatalyst lead to almost 7% degradation of 4chlorophenol in optimum conditions zinc oxide loading =. gl, alkalin p. Zinc Oxide loses photocatalytic property in acidic p. Conclusion Sunlight using catalyst of zinc oxide lead to degradation of persistent organic compounds significantly. The catalyst is not consumed and reusable. Keywords 4chlorophenol, sunlight, decomposition J Mazand Univ Med Sci 4; Suppl 9 Persian. 9

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