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Issue 10, 2017
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Facile preparation of S-doped magnetite hollow spheres for highly efficient sorption of uranium(vi)

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Abstract

Magnetite sorbents (MS) have been widely employed for water purification; however, adsorption capacity loss frequently occurs during the formation of magnetite sorbents. In this study, we report the preparation of S-doped magnetite hollow spheres (S-doped MHS) used for the removal of UO22+ with a large adsorption capacity of 450.0 mg U per g, higher than that of pure Fe3O4. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and a vibrating sample magnetometer (VSM) were used to determine the effectiveness of the synthesis of S-doped MHS. The S-doped MHS was investigated for the adsorption of uranium(VI) from an aqueous solution. In addition, the adsorption process fits the Freundlich isotherm model and pseudo-second-order rate equation perfectly. The affinity and selectivity of S-doped MHS for uranium(VI) is significantly high. S-doped MHS can be easily separated using an external magnetic field. Moreover, S-doped MHS can be used for the adsorption of other heavy metal ions, which indicates their promising potential applications as adsorbents in aqueous solutions.

Graphical abstract: Facile preparation of S-doped magnetite hollow spheres for highly efficient sorption of uranium(vi)

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Supplementary files

Article information


Submitted
17 Jan 2017
Accepted
13 Feb 2017
First published
24 Feb 2017

Dalton Trans., 2017,46, 3347-3352
Article type
Paper

Facile preparation of S-doped magnetite hollow spheres for highly efficient sorption of uranium(VI)

X. M. Song, L. C. Tan, H. Y. Ma, Y. Guo, L. Zhu, X. Q. Yi, J. Y. Gao, R. J. Yang and Q. Dong, Dalton Trans., 2017, 46, 3347
DOI: 10.1039/C7DT00209B

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