Prussian blue analogs-based layered double hydroxides for highly efficient Cs+ removal from wastewater

Shangqing Chen; Xiaonan Yang; Zheng Wang; Jiayin Hu; Senjian Han; Yafei Guo; Tianlong Deng

doi:10.1016/j.jhazmat.2020.124608

Prussian blue analogs-based layered double hydroxides for highly efficient Cs⁺ removal from wastewater

J Hazard Mater. 2021 May 15:410:124608. doi: 10.1016/j.jhazmat.2020.124608. Epub 2020 Nov 18.

Authors

Shangqing Chen¹, Xiaonan Yang¹, Zheng Wang¹, Jiayin Hu², Senjian Han¹, Yafei Guo³, Tianlong Deng¹

Affiliations

¹ Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
² Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China. Electronic address: hujiayin@tust.edu.cn.
³ Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China. Electronic address: guoyafei@tust.edu.cn.

PMID: 33243651
DOI: 10.1016/j.jhazmat.2020.124608

Abstract

In this work, novel Prussian blue analogs-based layered double hydroxide (PBA@ZnTi-LDH) was in situ synthesized and used for radioactive Cs⁺ removal from wastewater. The results suggested that this PBA@ZnTi-LDH prepared using LDH as skeleton and transition metal source showed higher adsorption capacity (243.9 mg/g) and water stability than conventional PBAs, and promising application in scale-up Cs⁺ removal. Thus, it was granulated by calcium alginate and the PBA@ZnTi-LDH/CaALG exhibited favorable post-separation and fixed-bed adsorption ability at different Cs⁺ concentrations and flow rates, highlighting its application perspective on Cs⁺ removal from various kinds of wastewater. Moreover, the real-world Cs⁺ removal was preliminarily explored using natural complex Cs⁺-containing water. As a result, this stable and easily separated PBA@ZnTi-LDH/CaALG showed high removal efficiency, selectivity and good reusability, which was promising in scale-up Cs⁺ removal from the real-world wastewater.

Keywords: Adsorption; Cesium; Fixed-bed; Layered double hydroxides; Prussian blue.

Publication types

Research Support, Non-U.S. Gov't