The enhanced adsorption of layered double hydroxides modification from single to ternary metal for fluoride by TEA-assisted hydrothermal method

Tian Huiyuan; Li Yang; Xia Mengyan; Cui Baoyu; Liu Chang; Du Xiuhong; Wang Zehua; Duan Xianying; Cui Jiehu

Arabian Journal of Chemistry (Mar 2024)

The enhanced adsorption of layered double hydroxides modification from single to ternary metal for fluoride by TEA-assisted hydrothermal method

Tian Huiyuan,
Li Yang,
Xia Mengyan,
Cui Baoyu,
Liu Chang,
Du Xiuhong,
Wang Zehua,
Duan Xianying,
Cui Jiehu

Affiliations

Tian Huiyuan: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China
Li Yang: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China
Xia Mengyan: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China
Cui Baoyu: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China
Liu Chang: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China
Du Xiuhong: Clinical Laboratory Medicine, Henan Medical College, Zhengzhou, PR China
Wang Zehua: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China
Duan Xianying: School of Medicine, Huanghe Science and Technology University, Zhengzhou, PR China; Institute of Chemistry, Henan Academy of Sciences, Zhengzhou, Henan 450002, PR China; Corresponding authors at: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China.
Cui Jiehu: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China; Henan Engineering Research Center for Ceramic Materials Interface, Zhengzhou University of Aeronautics, Zhengzhou, PR China; Corresponding authors at: School of Materials science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, PR China.

Journal volume & issue: Vol. 17, no. 3
p. 105645

Abstract

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Layered double hydroxides (LDHs) have attracted increasing attention as promising candidates by anion exchanges and selective adsorption in the fluoride treatment field. In this study, three new ternary Zn-Co-Cr-LDHs were synthesized by primarily a one-step TEA-assisted hydrothermal process at various times. They were characterized by X-ray powder diffraction, thermogravimetric analysis, scanning electron microscopy, X-ray photoelectron spectroscopy, N2 gas adsorption and desorption curves and zeta potential. The effects of dosage amount, reaction duration, initial solution pH, temperature, and co-existing ions were evaluated systematically for the Zn-Co-Cr-LDHs in fluoride removal process. Compared to Zn-LDHs and Zn-Co-LDHs, three Zn-Co-Cr-LDHs showed excellent adsorption performance for F- with maximum adsorption amounts of 108.87 mg/g, 97.27 mg/g, and 97.62 mg/g, respectively. The coexisting anions have less effect on the adsorption of F-. The introduction Cr3+ ion modulation in the Zn-Co-LDHs greatly improved the adsorption of fluoride ions. The kinetic process of fluoride ion adsorption is in accordance with the quasi-secondary kinetic model and the Elovich model, and the adsorption isotherm is in accordance with the Langmuir model. The quasi-secondary kinetic and Elovich models suggest that the process is chemisorption-controlled ion exchange adsorption. Zn-Co-Cr-LDHs are expected to have potential applications in fluoride removal process.

Published in Arabian Journal of Chemistry

ISSN: 1878-5352 (Print)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: http://www.journals.elsevier.com/arabian-journal-of-chemistry/

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