Synthesis of Mn/Co-MOF for effective removal of U(VI) from aqueous solution--颗粒学报PARTICUOLOGY

Xie, Y., Fan, L., Liu, W., Zhang, Q., & Huang, G. (2023). Synthesis of Mn/Co-MOF for effective removal of U(VI) from aqueous solution. Particuology, 72, 134-144. https://doi.org/10.1016/j.partic.2022.03.004

Synthesis of Mn/Co-MOF for effective removal of U(VI) from aqueous solution

Yuming Xie, Lijiao Fan, Wenbing Liu, Qin Zhang, Guolin Huang ^*

State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, China

10.1016/j.partic.2022.03.004

Volume 72, January 2023, Pages 134-144

Received 4 January 2022, Revised 11 March 2022, Accepted 24 March 2022, Available online 4 May 2022, Version of Record 18 May 2022.

E-mail: guolinhuang@sina.com

Highlights

• Mn/Co-MOF was quickly synthesized in deionized water by ultrasound-assisted method and characterized successfully.

• Adsorption performance of U(VI) on Mn/Co-MOF was evaluated.

• Maximum adsorption capacity of Mn/Co-MOF for U(VI) in aqueous solution is 763.36 mg/g.

• Adsorption kinetics, thermodynamics and possible adsorption mechanisms of U(VI) are discussed.

Abstract

Ultrasound-assisted synthesis of Mn/Co-MOF nanomaterial was used to capture uranium from aqueous solutions. Tests of Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transformed infrared spectra (FT-IR), Zeta potential analysis, thermogravimetric analysis (TGA), and X-ray diffraction (XRD) suggest that cobalt ions were replaced partially by manganese ions to generate MOF during the synthesis process and form manganous oxide particles loaded on the surface of Mn/Co-MOF. The optimal immobilization conditions of U(VI) were systematically studied by solution pH, kinetic, contact time and preparatory uranium concentration. XPS spectroscopy analysis indicated that the chelation of imidazole ring to uranium and Mn3O4 possibly played a certain role in the adsorption process. The results indicate that the adsorption isotherms of the Mn/Co-MOF for uranium suit Langmuir isotherm model (maximum adsorption capacity were 763.36 mg/g). Furthermore, the adsorption kinetics of Mn/Co-MOF match comfortably with the pseudo-second-order kinetic model.

Graphical abstract

Keywords

Adsorption; Uranium; Mn/Co-MOF; Kinetic

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