Quaternary Ammonium Groups Modified Magnetic Cyclodextrin Polymers for Highly Efficient Dye Removal and Sterilization in Water Purification

• Published in: Molecules (Basel, Switzerland) Switzerland), 2022-12, Vol.28 (1), p.167
• Main Authors: Liu, Bingjie, Wang, Shuoxuan, Wang, He, Wang, Yong, Xiao, Yin, Cheng, Yue
• Format: Article
• Language: English
• Subjects: adsorbent; Adsorption; Ammonium; Ammonium Compounds; Ammonium salts; Color removal; Coloring Agents; Contaminants; Control; Cyclodextrins; Cyclodextrins - chemistry; Decomposition; Decontamination; Drug resistance; dye pollution; Dyes; Dyes and dyeing; Environmental Pollutants; Humans; Magnetic Phenomena; Magnetism; Magnetite; Methods; Microorganisms; Nanoparticles; Organic contaminants; Phase transitions; Physiological aspects; Pollutant removal; Pollutants; Polymers; Polymers - chemistry; Porous materials; Purification; Quaternary ammonium salts; Recyclability; Sterilization; Sustainable development; Thermogravimetric analysis; Vibration; Wastewater; Wastewater pollution; Water; Water - chemistry; Water Pollutants, Chemical - chemistry; Water purification; Water Purification - methods; β-CD polymer; β-Cyclodextrin
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules28010167

Water recovery is a significant proposition for human survival and sustainable development, and we never stop searching for more efficient, easy-operating, low-cost and environmentally friendly methods to decontaminate water bodies. Herein, we combined the advantages of β-cyclodextrin (β-CD), magnetite nanoparticles (MNs), and two kinds of quaternary ammonium salts to synthesize two porous quaternary ammonium groups capped magnetic β-CD polymers (QMCDP1 and QMCDP2) to remove organic pollutants and eradicate pathogenic microorganisms effectively through a single implementation. In this setting, β-CD polymer (CDP) was utilized as the porous substrate material, while MNs endowed the materials with excellent magnetism enhancing recyclability in practical application scenarios, and the grafting of quaternary ammonium groups was beneficial for the adsorption of anionic dyes and sterilization. Both QMCDPs outperformed uncapped MCDPs in their adsorption ability of anionic pollutants, using methyl blue (MB) and orange G (OG) as model dyes. Additionally, QMCDP2, which was modified with longer alkyl chains than QMCDP1, exhibits superior bactericidal efficacy with a 99.47% removal rate for . Accordingly, this study provides some insights into designing a well-performed and easily recyclable adsorbent for simultaneous sterilization and adsorption of organic contaminants in wastewater.