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Published in: Cellulose 16/2022

05-09-2022 | Original Research

Click chemistry-induced selective adsorption of cationic and anionic dyes using functionalized cellulose methacrylate hydrogels

Authors: Shuo Wang, Xu Chen, Ze Li, Weiwei Zeng, Dekai Meng, Yonggui Wang, Zefang Xiao, Haigang Wang, Daxin Liang, Yanjun Xie

Published in: Cellulose | Issue 16/2022

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Abstract

In the preparation of hydrogels for removing dye pollutants from wastewaters, cellulose, a natural polymer, has become a popular raw material of late. In an effort to develop adsorbents capable of removing anionic and cationic dyes efficiently, certain cellulose-based hydrogels were prepared and analyzed in this study. The cellulose methacrylate (CM) organogels in dimethyl sulfoxide were initially produced by the self-crosslinking of the CM's pendant vinyl groups. Substitution of the maintained vinyl groups in CM organogels via thiol-ene click chemistry with 3-mercaptopropionic acid (MA) or cysteamine hydrochloride (CH) and subsequent exchange of the dimethyl sulfoxide by water yielded two types of cellulose-based hydrogels: CM-MA hydrogels and CM-CH hydrogels. Remarkably, the obtained CM-MA and CM-CH hydrogels exhibited the ability to selectively adsorb cationic and anionic dyes, which was found to be highly dependent on the grafted carboxyl-or amine groups. Using the anionic dye methyl blue (MLB) for CM-CH hydrogels and the cationic dye methylene blue (MEB) for CM-MA hydrogels, the isotherms, adsorption kinetics, and adsorption capacity of the hydrogels were investigated. The resultant CM-MA hydrogels had the highest MEB adsorption capacity (934.63 mg·g−1) and the CM-CH hydrogels had the highest MLB adsorption capacity (706.64 mg·g−1). A Langmuir isotherm and a pseudo-second-order kinetic model adequately characterized the data for both types of hydrogels. In contrast to the conventional compositing strategy, this research may provide an efficient and straightforward method for the development of cellulose-based hydrogels with excellent adsorption capacities for the removal of dyes, thereby opening up new applications for the treatment of dye-polluted wastewater.

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Appendix
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Literature
go back to reference Song X, An JL, He C, Zhou JK, Xu YT, Ji HF, Yang L, Yin JR, Zhao WF, Zhao CS (2019) A bioinspired strategy towards super-adsorbent hydrogel spheres via self-sacrificing micro-reactors for robust wastewater remediation. J Mater Chem A 7(37):21386–21403. https://doi.org/10.1039/C9TA05550ACrossRef Song X, An JL, He C, Zhou JK, Xu YT, Ji HF, Yang L, Yin JR, Zhao WF, Zhao CS (2019) A bioinspired strategy towards super-adsorbent hydrogel spheres via self-sacrificing micro-reactors for robust wastewater remediation. J Mater Chem A 7(37):21386–21403. https://​doi.​org/​10.​1039/​C9TA05550ACrossRef
Metadata
Title
Click chemistry-induced selective adsorption of cationic and anionic dyes using functionalized cellulose methacrylate hydrogels
Authors
Shuo Wang
Xu Chen
Ze Li
Weiwei Zeng
Dekai Meng
Yonggui Wang
Zefang Xiao
Haigang Wang
Daxin Liang
Yanjun Xie
Publication date
05-09-2022
Publisher
Springer Netherlands
Published in
Cellulose / Issue 16/2022
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-022-04822-0

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