Submitted: 20 Nov 2014
Revised: 30 Nov 2014
Accepted: 02 Dec 2014
First published online: 15 Oct 2017
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Avicenna J Environ Health Eng. 2015;2(2):4761-4761.
doi: 10.17795/ajehe-4761
  Abstract View: 121
  PDF Download: 100

Research Article

Degradation of Pentachlorophenol in Aqueous Solution by the UV/ZrO2/H2O2 Photocatalytic Process

Mohammad Reza Samarghandi 1, Ali Reza Rahmani 1, Mohammad Taghi Samadi 1, Majid Kiamanesh 2 * , Ghasem Azarian 2

1 Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, IR Iran
2 Department of Environmental Health Engineering, Health Sciences Research Center, Hamadan University of Medical Sciences, Hamadan, IR Iran
* Corresponding author: Majid Kiamanesh, Department of Environmental Health Engineering, Health Sciences Research Center, Hamadan University of Medical Sciences, Hamadan, IR Iran. Tel: +98-9183165169, Fax: +98-8138381641, Email: kia_majid@yahoo.com

Article

Pentachlorophenol (PCP), which is one of the resistant phenolic compounds, has been classified in the category of EPA’s priority pollutants due to its high toxicity and carcinogenic potential. Therefore, its removal from water and wastewater is very important. Various methods have been studied for removing the compound, among which advanced oxidation processes (AOPs) have attracted much attention because of ease of application and high efficiency. Thus the aim of this study was to investigate the efficiency of the UV/ZrO2/H2O2 process, as an AOP, for PCP removal from aquatic environments. The effects of several parameters such as ultraviolet (UV) exposure time, initial PCP concentration, pH, concentration of zirconium dioxide (ZrO2) nanoparticles, and H2O2 concentration were studied. Kinetics of the reaction was also detected. The concentration of the stated materials in the samples was determined using a spectrophotometer at 500 nm. The results showed that the highest efficiency (approximately 100%) was reached at optimized conditions of pH 6, contact time of 30 minutes, initial PCP concentration of 20 mg/L, the nanoparticles concentration of 0.1 g/L and H2O2 concentration of 14.7 mM/L. Also, the process followed the first order kinetics reaction. The obtained results illustrated that the UV/ZrO2/H2O2 process has a high ability in removing PCP.
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