Abstract
In this study, a magnetically separable Fe3O4/CeO2 (Fe/Ce) nanocomposite is synthesized by sol-precipitation method and characterized by field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy dispersive spectrometer , vibrating sample magnetometer, atomic absorption spectrometer, and zeta potential measurements. The Fe/Ce is used as sorbent to adsorb anionic dye of Acid Black 210 (AB210) from aqueous solutions, and the maximum adsorption capacity is about 90.50 mg/g, which is six times higher than that of the commercial CeO2. Dependence of absorption performance on essential factors, such as initial dye concentration, temperature and initial pH, are experimentally examined. The result shows that the adsorption kinetic of Fe/Ce follows pseudo-second-order model and the adsorption isotherm is well described by the Langmuir adsorption model. Furthermore, the thermodynamic analysis indicates that the adsorption of Fe/Ce for AB210 is spontaneous and endothermic.
Highlights
In recent years, organic dye contamination has attracted much attention due to their large amount of emissions and increasing damage to natural environment (Hao et al, 2014; Song et al, 2015)
The removal of Acid Black 210 (AB210) from aqueous solutions is studied by the Fe/Ce sorbent
Fe/Ce can be well dispersed in water and can be separated from water under external magnetic field
Summary
Organic dye contamination has attracted much attention due to their large amount of emissions and increasing damage to natural environment (Hao et al, 2014; Song et al, 2015). Keywords Magnetic, anionic dye, kinetics, thermodynamics, Fe3O4/CeO2 Shan et al (2014) have studied the adsorption of dyes such as Reactive Red, Congo Red, and Acid Red 1 from aqueous solutions by magnetic Fe3O4/MgAl-layered double hydroxide composite.
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