Issue 28, 2025

Synthesis, structural characteristics, and adsorption properties of benzimidazole-functionalized hyper-cross-linked resin

Abstract

Macroporous chloromethylated polystyrene (CMPs) has found extensive applications in wastewater treatment owing to its distinct chemical structure and adsorption performance. To enhance its adsorption capability, a series of meticulously designed chemical reactions were implemented in this work. Particularly, specific functional groups were ingeniously introduced via a Friedel–Crafts alkylation reaction combined with a nucleophilic substitution reaction. The result was the successful synthesis of benzimidazole-modified CMPs (BZI-HCMPs). This newly modified adsorbent exhibited exceptional adsorption performance in the presence of salicylic acid (SA) in an aqueous solution. The maximum adsorption capacity of BZI-HCMPs was 295.1 mg g−1 at 313 K, with the Freundlich model providing a better fit for equilibrium data. The adsorption process was rapid, reaching equilibrium within just 70 minutes. Compared with the pseudo-second-order model, the pseudo-first-order model precisely described the kinetic data of this adsorption process, providing robust theoretical support for a deeper understanding of the adsorption mechanism. Furthermore, BZI-HCMPs are reusable and maintain high adsorption capacity after several adsorption–desorption cycles. This work affords a new method for the adsorption of SA from aqueous solutions.

Graphical abstract: Synthesis, structural characteristics, and adsorption properties of benzimidazole-functionalized hyper-cross-linked resin

Supplementary files

Article information

Article type
Paper
Submitted
20 May 2025
Accepted
17 Jun 2025
First published
01 Jul 2025

New J. Chem., 2025,49, 12322-12330

Synthesis, structural characteristics, and adsorption properties of benzimidazole-functionalized hyper-cross-linked resin

J. Li, Y. Tan, W. Chen, G. Chen, L. Chen, J. He, S. Wang, H. Zhang and Y. Yuan, New J. Chem., 2025, 49, 12322 DOI: 10.1039/D5NJ02134K

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