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September 5, 2026ACS OmegaOpen Access

Zwitterionic Copolymer-Modified Mesoporous Silica Material: A Promising Adsorbent for Both Anionic and Cationic Dye Removal and an Efficient Stationary Phase for Liquid Chromatography

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Authors

AMAbul K. MallikMAMd Tawfiq AnikEHEnamul Haque

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Overview

Experimental study demonstrates dual dye removal and chromatographic separation using zwitterionic-modified silica, highlighting versatile utility in wastewater cleanup and chemical analysis.

Key Points

  • To synthesize and evaluate a dual-purpose mesoporous silica material modified with a zwitterionic copolymer for the removal of both anionic and cationic dyes and for hydrophilic interaction liquid chromatography.
  • Synthesized an end-functionalized copolymer of methyl acrylate and sulfobetaine methacrylate and immobilized it onto mesoporous silica via a grafting-to method.
  • Characterized the synthesized material using 1H NMR, ATR-FTIR, SEM, TGA, elemental analysis, and zeta potential measurements.
  • Evaluated batch adsorption capacities for methylene blue and Congo Red across varying pH levels, and packed the material into a 150 × 2.1 mm column to assess chromatographic separation using Tanaka test probes.
  • Achieved maximum adsorption capacities of 2000.00 mg/g for cationic methylene blue and 1666.67 mg/g for anionic Congo Red under varying pH conditions.
  • Outperformed conventional silica-based adsorbents in dye adsorption capacities and delivered superior polar compound separation compared to popular commercial hydrophilic interaction chromatography columns.

Cite This Study

Mallik et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd4606b95aff0620ec087https://doi.org/10.1021/acsomega.6c08360
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