Developing chitosan-based magnetic functionalized porous polymer for effective extraction of benzoylurea insecticides from vegetables.

Authors

Li Shuofeng, Junmin Wang, Zhi Li, Qianqian Wang, Chun Wang, Qiuhua Wu

Published in

International journal of biological macromolecules. Pages 153350. Jul 05, 2026. Epub Jul 05, 2026.

Abstract

Herein, a novel chitosan-based magnetic bio-sorbent (M-Cs-BD@TBB) was synthesized through grafting chitosan with benzaldehyde (BD) and then crosslinking with 1,3,5-tris(bromomethyl)benzene (TBB) before modification with Fe₃O₄. Owing to the presence of multiple functional groups (-OH, -C=N, O, benzene ring), high porosity, and excellent wettability, M-Cs-BD@TBB demonstrated good adsorption performance for benzoylurea insecticides (BUs). Hydrogen bonding, π-π stacking, halogen bonding, and pore-filling were proved to be the potential adsorption mechanism. Moreover, the adsorption process of M-Cs-BD@TBB for BUs followed the Langmuir model and the pseudo-second-order kinetics model, indicating monolayer adsorption predominantly governed by chemical adsorption. Furthermore, M-Cs-BD@TBB exhibited remarkable utilization potentiality thanks to its outstanding preparation reproducibility, stability, and repeatability. Then, this reliable and innovative bio-sorbent coupled with high performance liquid-phase chromatography provided an attractive method for effectively trapping and detecting trace levels of BUs in food samples.

PMID:
42402298
Bibliographic data and abstract were imported from PubMed on 06 Jul 2026.

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