Lithium adsorption from brine by iron-doped titanium lithium ion sieves--颗粒学报PARTICUOLOGY

Wang, S., Chen, X., Zhang, Y., Zhang, Y., & Zheng, S. (2018). Lithium adsorption from brine by iron-doped titanium lithium ion sieves. Particuology, 41, 40-47. https://doi.org/10.1016/j.partic.2018.02.001

Lithium adsorption from brine by iron-doped titanium lithium ion sieves

Shulei Wang ^{a b 1}, Xin Chen ^{c 1}, Ying Zhang ^a, Yang Zhang ^a, Shili Zheng ^a *

a National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
c School of Chemical Engineering, Tianjin University, Tianjin 300350, China

10.1016/j.partic.2018.02.001

Volume 41, December 2018, Pages 40-47

Received 8 December 2017, Revised 29 January 2018, Accepted 9 February 2018, Available online 19 June 2018, Version of Record 1 November 2018.

E-mail: slzheng@ipe.ac.cn

Highlights

• Iron-doped lithium ion sieves were synthesized via solid-state reaction at 600 °C and Fe/Ti = 0.15.

• The synthesized sieves had Li⁺ adsorption capacity of ∼35 mg/g in brines.

• The synthesized ion sieves exhibited a high selectivity to Li⁺ and steady recyclability.

Abstract

Iron-doped lithium titanium oxides were prepared via a solid-state reaction and transformed into lithium ion sieves by acid treatment. Scanning electron microscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy showed that Fe³⁺ was doped into the Ti–O lattice and Ti–Fe–O bonds were formed. Iron-doping improved lithium ion adsorption from brines. The saturated adsorption capacity of the iron-doped ion sieves in brine (Li⁺ 1.56 g/L, pH = 8.8) was 34.8 mg/g. Lithium ion adsorption fitted pseudo-second-order kinetic and Langmuir equations, indicating that lithium ion adsorption on iron-doped lithium ion sieves was chemical and predominantly monolayer. In addition, the iron-doped ion sieves showed excellent selectivity for lithium ion and good recyclability. These iron-doped ion sieves therefore provide effective lithium adsorbents for practical applications.

Graphical abstract

Keywords

Iron-doped; Lithium ion sieves; Brine; Adsorption

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