Comparative adsorption behaviors of synthesized iron nanoparticles (Fe-NPs) and aluminum nanoparticles (Al-NPs) on 4+ thorium(IV) (Th ) ion from aqueous solution have been studied using batch system. Both Fe-NPs and Al-NPs were syn- thesized by hydrothermal method and characterized by X-ray diffraction, X-ray fluorescence, scanning electron microscopy, Brunauer–Emmett–Teller and Fourier transform infrared. The results showed that more than 90% of synthesized nanopar- ticles were in the size range of 7–100 nm, when the specific surface area of Fe-NPs and Al-NPs was found to be 126.1 and 2 −1 4+ 37.4 m g , respectively. The influence of variables namely sorbent weight, contact time and pH on the adsorption of Th ion was investigated. The pH dependence was observed in both Fe-NPs and Al-NPs adsorption processes, and the maximum adsorption occurred at pH 5 and 4, respectively. For both Fe-NPs and Al-NPs, kinetic data correspond well to the pseudo- second-order and the coefficient of determination ( R ) indicates that the developed model is appropriate. In addition, for both Fe-NPs and Al-NPs, the adsorption data were well fitted by the Langmuir isotherm. The maximum adsorption percent and −1 −1 adsorption capacity for Fe-NPs and Al-NPs were found to be 98%; 595 mg g and
International Journal of Environmental Science and Technology – Springer Journals
Published: Jun 4, 2018
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