Silica-coated magnetic Fe3O4 nanoparticles as efficient nano-adsorbents for the improvement of the vapor-phase adsorption of benzene

Authors : Mehmet Şakir ECE, Sinan KUTLUAY, Ömer ŞAHİN
Pages : 33-41
Doi:10.32571/ijct.755761
View : 39 | Download : 13
Publication Date : 2021-06-30
Article Type : Research Paper
Abstract :This study focused on the synthesis of silica-coated magnetic Fe3O4 insert ignore into journalissuearticles values(Fe3O4@SiO2); nanoparticles and their application for the improvement of the vapor-phase adsorption of benzene. The magnetic Fe3O4@SiO2 nanoparticles were synthesized according to the co-precipitation method, while their characterization was performed using scanning electron microscopy insert ignore into journalissuearticles values(SEM);, Fourier transform infrared spectroscopy insert ignore into journalissuearticles values(FTIR); and Brunauer-Emmett-Teller insert ignore into journalissuearticles values(BET); surface area analyses. The experimental parameters were optimized to achieve the maximum adsorption capacity for the vapor-phase benzene by Box-Behnken design insert ignore into journalissuearticles values(BBD); under response surface methodology insert ignore into journalissuearticles values(RSM);. The magnetic Fe3O4@SiO2 nanoparticles adsorbed 197.50 mg/g of the vapor-phase benzene under the following optimum conditions: 39.48 min residence time, 14.21 ppm initial benzene concentration and 26.51°C temperature. The Langmuir, Freundlich and Dubinin-Radushkevich insert ignore into journalissuearticles values(D-R); models were used to evaluate the adsorption equilibrium data, and the results were found to be well fitted to the D-R model. The kinetic data obeyed the pseudo-second-order kinetic model for the vapor-phase adsorption of benzene by magnetic Fe3O4@SiO2 nanoparticles. This study demonstrated the application potential of magnetic Fe3O4@SiO2 nanoparticles as promising low-cost nano-adsorbents for the vapor-phase adsorption of benzene.
Keywords : Magnetic Fe3O4@SiO2 nanoparticles, response surface methodology, vapor phase adsorption of benzene

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