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Benzene and MTBE removal by Fenton’s process using stabilized Nano Zero-Valent Iron particles | ||
| Journal of Applied Research in Water and Wastewater | ||
| مقاله 2، دوره 4، شماره 2 - شماره پیاپی 8، اسفند 2017، صفحه 343-348 اصل مقاله (1.65 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22126/arww.2017.788 | ||
| نویسندگان | ||
| Ali Beryani1؛ Alireza Pardakhti2؛ Mojtaba Ardestani2؛ Mohammad Ali Zahed* 3 | ||
| 1Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran | ||
| 2Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. | ||
| 3Faculty of biological sciences, Kharazmi University, Tehran, Iran | ||
| چکیده | ||
| A bench-scale study was designed for removal of Methyl Tertio Butyl Ether (MTBE) and benzene from south of Tehran groundwater. The experiments were implemented on a one-dimensional soil column with similar chemical and physical conditions of the region. Fenton’s chemical oxidation with stabilized nano zero-valent iron particles (S-NZVI) as catalyst was used. For treatment of groundwater polluted with 2 mg L-1 MTBE and 1 mg L-1 benzene, optimum concentrations of H2O2 and S-NZVI were 1500 and 300 mg L-1, respectively. The optimum concentrations led to 78 % elimination of MTBE and 87 % of benzene. Hazardous by-products (acetone and tertio-butyl alcohol) concentrations were less than 0.1 mg L-1, which were considered to be negligible. The soil permeability was reduced to 30 % after removal process. To increase the system efficiency and reduce the consumption of iron, the reaction environment was acidified down to pH = 3.2 led to removal efficiency of 90 % and 96 % for MTBE and benzene, respectively. The scavengers (ions) reduced the system efficiency up to 15 %. This study indicates that theoretically the MTBE and benzene could be removed from groundwater using Fenton’s chemical oxidation with S-NZVI. | ||
| کلیدواژهها | ||
| MTBE؛ Benzene؛ Groundwater؛ Fenton؛ Stabilized Nano Zero-valent Iron | ||
| مراجع | ||
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Alizadeh Fard M., Torabian A., Nabi Bidhendi G.R., Aminzadeh B., Fenton and photo-Fenton oxidation of petroleum aromatic hydrocarbons using nanoscale zero-valent iron, Journal of Environmental Engineering 139 (2013) 966-974. U.S. EPA,. Test Methods for Evaluating Solid Waste, Physical/Chemical Methods- SW 846. United States Environmental Protection Agency, Cincinnati, OH, (2008). Xue D., Sethi R., Viscoelastic gels of guar and xanthan gum mixtures provide long-term stabilization of iron micro- and nanoparticles, Environmental Engineering Science 14 (2012) 1-14. | ||
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