Synergistic integration of adsorption and antibacterial activity in a quaternized cyclodextrin composite for water reclamation.

A quaternized cyclodextrin composite (CC-GTA) achieved up to 98% antibacterial efficiency against Escherichia coli and Staphylococcus aureus while maintaining strong adsorption for bisphenol A and methyl orange.

• Why it matters: Wastewater treatment needs materials that can handle both adsorption of contaminants and bacterial contamination together, since cyclodextrin-based systems have struggled to address these linked problems simultaneously.
• What they did: CC-GTA was made by a two-step grafting method, then characterized and tested for adsorption of bisphenol A (218.12 mg/g) and methyl orange (384.09 mg/g), plus antibacterial performance in real wastewater.
• The result: CC-GTA removed 84% of bovine serum albumin and retained 95% antibacterial efficiency in real wastewater, with effects linked to electrostatic bacterial adhesion and membrane disruption.

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