Response surface analysis of photocatalytic degradation of methyl tert-butyl ether by core/shell Fe3O4/ZnO nanoparticles

Journal of Environmental Health Science Engineering

Reza Aminzadeh¹  Seyyed Ali Akbar Nakhli²  Atefeh Alizadehbirjandi²  Mehriana Alizadeh¹  Mohammad Hossein Rostami¹  Mojtaba Safari¹ 

[1] Department Of Chemical Engineering, Amirkabir University Of Technology, Tehran, Iran;Department Of Chemical And Petroleum Engineering, Sharif University Of Technology, Tehran, Iran

关键词: Response surface modeling;    MTBE;    Photocatalytic degradation;    Fe₃O₄/ZnO nanoparticles;   

Others  :  811182
DOI  :  10.1186/2052-336X-12-1

 received in 2012-12-19, accepted in 2013-09-29,  发布年份 2014

【 摘 要 】

The degradation of methyl tert-butyl ether (MTBE) was investigated in the aqueous solution of coated ZnO onto magnetite nanoparticale based on an advanced photocatalytic oxidation process. The photocatalysts were synthesized by coating of ZnO onto magnetite using precipitation method. The sample was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibration sample magnetometer (VSM). Besides, specific surface area was also determined by BET method. The four effective factors including pH of the reaction mixture, Fe₃O₄/ZnO magnetic nanoparticles concentration, initial MTBE concentration and molar ratio of [H₂O₂]/ [MTBE] were optimized using response surface modeling (RSM). Using the four-factor-three-level Box–Behnken design, 29 runs were designed considering the effective ranges of the influential factors. The optimized values for the operational parameters under the respective constraints were obtained at PH of 7.2, Fe₃O₄/ZnO concentration of 1.78 g/L, initial MTBE concentration of 89.14 mg/L and [H₂O₂]/ [MTBE] molar ratio of 2.33. Moreover, kinetics of MTBE degradation was determined under optimum condition. The study about core/shell magnetic nanoparticles (MNPs) recycling were also carried out and after about four times, the percentage of the photocatalytic degradation was about 70%.

【 授权许可】

   
2014 Safari et al.; licensee BioMed Central Ltd.

【 图 表 】

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