Facile synthesis of ATTM@ZIF-8 modified pullulan hydrogels for enhanced adsorption of Congo red and malachite green.

Autor: Su T; Anhui Provincial Key Laboratory of Green Carbon Chemistry, Fuyang Normal University, Fuyang 236037, China; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China., Su X; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China., Sun Z; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China., Li Y; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China., Li L; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China., Shi J; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China. Electronic address: jianshi@mail.ustc.edu.cn., Geng R; Anhui Provincial Key Laboratory of Green Carbon Chemistry, Fuyang Normal University, Fuyang 236037, China; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China. Electronic address: renyonggeng@fynu.edu.cn., Li H; Anhui Provincial Key Laboratory of Green Carbon Chemistry, Fuyang Normal University, Fuyang 236037, China; School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China. Electronic address: huiquanli0908@163.com.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Nov; Vol. 279 (Pt 3), pp. 135465. Date of Electronic Publication: 2024 Sep 07.
DOI: 10.1016/j.ijbiomac.2024.135465
Abstrakt: Efficient capture of dyes from wastewater is of great importance for environmental remediation. Yet constructing adsorbents with satisfactory adsorption efficiency and low cost remains a major challenge. This work reports a simple and scalable method for the fabrication of functionalized porous pullulan hydrogel adsorbent decorated with ATTM@ZIF-8 for the adsorption of congo red (CR) and malachite green (MG). The embedding of ammonium tetrathiomolybdate (ATTM) into the ZIF-8 nanoclusters offered additional adsorption sites and enlarged the pore size of the resulting ATTM@ZIF-8. The homogeneous dispersion of the nanoparticles in the three-dimensional network of polysaccharide gels prevents their agglomeration and thus improves the affinity for dye molecules. The resulting adsorbent AZP-20 at optimized composite ratios exhibits high activity, selectivity, interference resistance, reusability and cytocompatibility in dye adsorption applications, and possesses high removal rate of dye in real water systems. Batch experiments demonstrated that the adsorption rate of AZP-20 for MG and CR was 1645.28 mg g -1 and 680.33 mg g -1 , and would be influenced by pH conditions. Adsorption kinetics followed pseudo-second-order model. Adsorption isotherms followed Langmuir model for MG and Freundlich model for CR. The adsorption of dye molecules primarily relied on electrostatic interaction (MG) and π-π stacking interaction (CR). Conclusively, the prepared AZPs adsorbent illuminated good application prospects in the treatment of complex component dye wastewater.
Competing Interests: Declaration of competing interest I declare on behalf of my co-authors that the work is original research, has not been published previously by any of the authors, and is not under consideration for publication elsewhere at the time of submission, in whole or in part. In addition, no conflict of interest exists in this submission, and the manuscript is approved for publication by all the listed co-authors.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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