Abstract
Hyper-cross-linked polymers modified with chemical groups are excellent porous materials for the adsorption of aromatic compounds from aqueous solution. Herein two kinds of imidazole-modified polymers, imidazole-modified hyper-cross-linked polymer with two steps (N-HCLPs) and imidazole-modified hyper-cross-linked polymer with one step (N-LCMPs) were comparatively prepared from macroporous chloromethylated polystyrene (CMPS), and they were employed as the adsorbents for the adsorption of salicylic acid from aqueous solution. The results indicated that N-HCLPs owned higher specific surface area and pore volume than N-LCMPs while N-LCMPs had much higher imidazole moieties than N-HCLPs. The adsorption results showed that these two polymers were efficient for the adsorption of salicylic acid, N-LCMPs (295.2 mg/g) had a higher capacity than N-HCLPs (263.2 mg/g), implying that acid–base interaction and hydrogen bonding was mainly responsible for the adsorption. The adsorption process was very fast and the equilibrium was attained within 120 min, the pseudo-second-order rate model was more suitable to characterize the kinetic data.
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The National Natural Science Foundation of China (No. 51673216) and the Fundamental Research Funds for the Central Universities Central South University (No. 2018zzts116) are acknowl-edged for the financial supports.
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Chen, G., Zeng, X. & Huang, J. Imidazole-modified polymers and their adsorption of salicylic acid from aqueous solution. J Polym Res 29, 258 (2022). https://doi.org/10.1007/s10965-022-03099-y
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DOI: https://doi.org/10.1007/s10965-022-03099-y