:: Volume 18, Issue 3 (Iranian South Medical Journal 2015) ::
Iran South Med J 2015, 18(3): 516-526 Back to browse issues page
Pyrene removal from contaminated soil using electrokinetic process combined with surfactant
Seyed Enayat Hashemi1, Abbas Rezaee2, Seyed Mohammad Mousavi3, Mohammadreza Nikodel4, Hosean Ganjiidoust5
1- Department of Environmental Health Engineering, Faculty of Health, Medical Sciences University of Bushehr. Iran
2- Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran , abbasrezaee@yahoo.com; rezaee@modares.ac.ir
3- Department of Biotechnology, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
4- Department of Engineering Geology, Faculty of Basic Science, Tarbiat Modares University, Tehran, Iran
5- Department of Environmental Engineering, Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
Abstract:   (5930 Views)

Background: Pyrene is one of the stable polycyclic aromatic hydrocarbons that is considered as an important pollutants, because of extensive distribution in the environment and carcinogenic and mutagenic properties. Among the various treatment techniques, electrokinetic method is an environmental- friendly process for organic and mineral pollutants adsorbed to soil with fine pore size the same as clay and low hydraulic conductivity soils. For improving the efficiency of pyrene removal from soil, soulobilization of pyrene from soil could be used by surfactants. Materials and Methods : In this study, clay soil was selected as model because of the specific properties. Combined method using surfactant and electrokinetic was applied for pyrene removal from soil. Experiments were designed using response surface methodology (RSM), and effect of three variables includes surfactant concentration, voltage and surfactant type were evaluated for pyrene removal from contaminated soil. Results: Pyrene removal using anionic surfactants(SDS) and nonionic surfactants(TX100) as a solubilizing agents has high removal efficiency. In the optimum condition with 95% confidence coefficient, utilizing mixed surfactants of sodium dodecyl sulfate and triton X-100 with the same volume, induced of 18.54 volt and 6.53 percent surfactant concentration have 94.6% pyrene removal efficiency. Conclusion:: Results of this study shows that electrokinetic process combined with surfactant as solubilizing agent could be applied as an efficient method for treating the pyrene-contaminated soils.

Keywords: Pyrene, Contaminated soil, Electrokinetic process, Surfactant
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Type of Study: Original | Subject: Public Health
Received: 2014/01/14 | Accepted: 2014/04/5 | Published: 2015/06/28

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