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; Q Dong

doi:10.1039/c7dt00209b

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

Dalton Trans. 2017 Mar 7;46(10):3347-3352. doi: 10.1039/c7dt00209b.

Authors

X M Song¹, L C Tan², H Y Ma¹, Y Guo¹, L Zhu¹, X Q Yi¹, J Y Gao¹, R J Yang¹, Q Dong¹

Affiliations

¹ Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China. tanlcking@163.com.
² Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China. tanlcking@163.com and Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China.

PMID: 28232998
DOI: 10.1039/c7dt00209b

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.