Author/Authors :
Safari، Mojtaba نويسنده Department Of Chemical Engineering, Amirkabir University Of Technology, Tehran, Iran , , Rostami، Mohammad Hossein نويسنده 1Department Of Chemical Engineering, Amirkabir University Of Technology, Tehran, Iran , , Alizadeh، Mehriana نويسنده 1Department Of Chemical Engineering, Amirkabir University Of Technology, Tehran, Iran , , Alizadehbirjandi، Atefeh نويسنده Department Of Chemical And Petroleum Engineering, Sharif University Of Technology, Tehran, Iran , , Nakhli، Ali Akbar نويسنده Department Of Chemical And Petroleum Engineering, Sharif University Of Technology, Tehran, Iran , , Aminzadeh، Reza نويسنده Department Of Chemical Engineering, Amirkabir University Of Technology, Tehran, Iran ,
Abstract :
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%.
