Mechanosynthesis of MFe2O4 (M = Co, Ni, and Zn) Magnetic Nanoparticles for Pb Removal from Aqueous Solution
作者： America R. Vazquez-Olmos , Mohamed Abatal , Roberto Y. Sato-Berru , G. K. Pedraza-Basulto , Valentin Garcia-Vazquez
DOI: 10.1155/2016/9182024
关键词:
摘要: Adsorption of Pb(II) from aqueous solution using MFe2O4 nanoferrites (M = Co, Ni, and Zn) was studied. Nanoferrite samples were prepared via the mechanochemical method characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), micro-Raman, vibrating sample magnetometry (VSM). XRD analysis confirms formation pure single phases cubic ferrites with average crystallite sizes 23.8, 19.4, 19.2 nm for CoFe2O4, NiFe2O4, ZnFe2O4, respectively. Only NiFe2O4 ZnFe2O4 show superparamagnetic behavior at room temperature, whereas CoFe2O4 is ferromagnetic. Kinetics isotherm adsorption studies carried out. A pseudo-second-order kinetic describes sorption behavior. The experimental data isotherms well fitted to Langmuir model. maximum capacity on found be 20.58, 17.76, 9.34 mg·g−1 M Zn,
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