期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 49, 期 15, 页码 2426-2436出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2014.926457
关键词
mixed oxide; nano-sized; sorption; lanthanides
Nano-structured iron(III)-titanium(IV) mixed oxide, Fe-O-Ti, was prepared by co-precipitation technique and characterized using Transmission Electron Microscopy, Fourier Transform Infra Red, Energy Dispersive X-ray spectroscopy, and Thermal Analysis. The particle size of the prepared material was found to be 10-15 nm. The sorptive potential of nano-composite, Fe-O-Ti, for the removal of some lanthanide elements (including, Ce, Nd, and Gd) was assessed in this work. The percent uptake was found to be 95.6%, 89.5, and 81.9 for Ce3+, Nd3+, and Gd3+ ions, respectively. Three kinetic models, pseudo-first-order, pseudo-second-order, and intra particle diffusion models, were tested. The results indicated that the pseudo-second-order model is more applicable for the sorption process. The experimental equilibrium data were tested for the Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm models; it was well predicted by the Freundlich model. The thermodynamic parameters were calculated. The results indicated that the nano-sized iron-titanium mixed oxide can be considered as a promising material for the removal of some lanthanides from aqueous solution.
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