Investigate the ultrasound energy assisted adsorption mechanism of nickel(II) ions onto modified magnetic cobalt ferrite nanoparticles: Multivariate optimization |
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| Institution: | 1. Department of Chemistry, University of Zanjan, Zanjan 45195-313, Islamic Republic of Iran;2. Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Islamic Republic of Iran;1. Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, 98135-674, Iran;2. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317-51167, I. R, Iran;3. Department of Chemistry, College of Science, University of Raparin, Rania, Kurdistan Region, Iraq;4. Department of Chemistry, College of Science, International University of Erbil, Iraq;1. Centre for Nanoscience and Nanotechnology, ITER, S‘O’A Deemed to be University, Bhubaneswar 751030, India;2. Radiochemistry Division, Bhabha Atomic Research Centre (BARC), Mumbai 400094, India;3. Homi Bhabha National Institute, Department of Atomic Energy, Mumbai 400094, India;4. Department of Chemistry, ITER, S‘O’A Deemed to be University, Bhubaneswar 751030, India |
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| Abstract: | In present study, magnetic cobalt ferrite nanoparticles modified with (E)-N-(2-nitrobenzylidene)-2-(2-(2-nitrophenyl)imidazolidine-1-yl) ethaneamine (CoFe2O4-NPs-NBNPIEA) was synthesized and applied as novel adsorbent for ultrasound energy assisted adsorption of nickel(II) ions (Ni2+) from aqueous solution. The prepared adsorbent characterized by Fourier transforms infrared spectroscopy (FT-IR), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and X-ray diffraction (XRD). The dependency of adsorption percentage to variables such as pH, initial Ni2+ ions concentration, adsorbent mass and ultrasound time were studied with response surface methodology (RSM) by considering the desirable functions. The quadratic model between the dependent and independent variables was built. The proposed method showed good agreement between the experimental data and predictive value, and it has been successfully employed to adsorption of Ni2+ ions from aqueous solution. Subsequently, the experimental equilibrium data at different concentration of Ni2+ ions and 10 mg amount of adsorbent mass was fitted to conventional isotherm models like Langmuir, Freundlich, Tempkin, Dubinin-Radushkevich and it was revealed that the Langmuir is best model for explanation of behavior of experimental data. In addition, conventional kinetic models such as pseudo-first and second-order, Elovich and intraparticle diffusion were applied and it was seen that pseudo-second-order equation is suitable to fit the experimental data. |
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| Keywords: | Multivariate optimization Ultrasound energy Adsorption Magnetic cobalt ferrite nanoparticles Adsorption mechanism |
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