Gamma-ferric oxide nanoparticles decoration onto porous layered double oxide belts for efficient removal of uranyl

Kairuo Zhu; Changlun Chen; Haiyan Wang; Yi Xie; Muhammad Wakeel; Abdul Wahid; Xiaodong Zhang

doi:10.1016/j.jcis.2018.10.005

Gamma-ferric oxide nanoparticles decoration onto porous layered double oxide belts for efficient removal of uranyl

J Colloid Interface Sci. 2019 Feb 1:535:265-275. doi: 10.1016/j.jcis.2018.10.005. Epub 2018 Oct 4.

Authors

Kairuo Zhu¹, Changlun Chen², Haiyan Wang³, Yi Xie⁴, Muhammad Wakeel⁵, Abdul Wahid⁵, Xiaodong Zhang⁶

Affiliations

¹ CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230000, PR China.
² CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China; Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China. Electronic address: clchen@ipp.ac.cn.
³ Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China.
⁴ CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China.
⁵ Department of Environment Sciences, Bahauddin Zakariya University, Multan 60800, Pakistan.
⁶ CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China. Electronic address: xdzhang@ipp.ac.cn.

PMID: 30312952
DOI: 10.1016/j.jcis.2018.10.005

Abstract

Layered double oxides (LDO) and γ-Fe₂O₃ have been demonstrated to be promising adsorbents to remove radioactive elements from aqueous media. Herein, magnetic γ-Fe₂O₃ nanoparticles decoration onto porous layered double oxides belts (γ-Fe₂O₃/LDO) were fabricated by in situ solid-state thermolysis technique combined with Fe(III)-loaded layered double hydroxides as a precursor. The microstructure, chemical composition, and magnetic properties of γ-Fe₂O₃/LDO were characterized in detail. The as-obtained γ-Fe₂O₃/LDO was employed as an adsorbent for the elimination of U(VI) from water. The adsorption process followed the Langmuir model with the maximal adsorption capacity of U(VI) onto γ-Fe₂O₃/LDO being 526.32 mg·g^-1 at 303 K and pH 5, which surpassed pristine LDO and many other materials. The Fourier transformed infrared spectra and the X-ray photoelectron spectra analysis suggested that the interaction mechanism was mainly controlled by the surface complexation and electrostatic interactions. All in all, the γ-Fe₂O₃/LDO with remarkable adsorption capacity, excellent regeneration, and easy magnetic separation opens a new expectation as a suitable material for the cleanup of U(VI) from contaminated water.

Keywords: Adsorption; Layered double oxides belts; Magnetic γ-Fe(2)O(3) nanoparticles; U(VI).