Key Laboratory of Eco-textiles of Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China.
Key Laboratory of Eco-textiles of Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China.
Carbohydr Polym. 2021 Aug 15;266:118129. doi: 10.1016/j.carbpol.2021.118129. Epub 2021 Apr 28.
In this study, we constructed a novel family of chitosan-based cryogels with antibacterial activity to treat different types of dye wastewater. Glycidyl methacrylate (GMA) cross-linked chitosan (CS) cryogels functionalized with negatively and positively molecules were prepared via thermo-crosslinking and freeze-drying methods. These chitosan-based cryogels present a well-defined three-dimensional microporous network structure with ultra-light and high porosity, and have high water absorption ability. For CS/GMA/SMA cryogels, 71.20% of Cationic Yellow X-8GL (CY) can be removed, and the process kinetics well corresponded to the Pseudo-second order model and Freundlich model. The quantity and percent of Reactive Yellow B-4RFN (RY) removal by CS/GMA/DMC cryogel reached at 224.6 mg/g and 96.11%, which closely fitted the Pseudo-second order model and Dubinin-Radushkevich isotherm. Furthermore, the chitosan-based cryogels showed antibacterial efficacies against E. coli and S. aureus. The prepared chitosan-based cryogels with adsorption and antibacterial properties have great potential for the remediation of dyeing wastewater.
在这项研究中，我们构建了一系列具有抗菌活性的新型壳聚糖基冷冻凝胶，用于处理不同类型的染料废水。通过热交联和冷冻干燥方法制备了带有负电荷和正电荷分子的甲基丙烯酸缩水甘油酯（GMA）交联壳聚糖（CS）冷冻凝胶。这些壳聚糖基冷冻凝胶具有明确的三维微孔网络结构，超轻、高孔隙率，具有高吸水性。对于 CS/GMA/SMA 冷冻凝胶，可去除 71.20%的阳离子黄 X-8GL（CY），过程动力学很好地符合拟二级模型和 Freundlich 模型。CS/GMA/DMC 冷冻凝胶对活性黄 B-4RFN（RY）的去除量和去除率分别达到 224.6 mg/g 和 96.11%，其与拟二级模型和 Dubinin-Radushkevich 等温线拟合较好。此外，壳聚糖基冷冻凝胶对大肠杆菌和金黄色葡萄球菌具有抗菌功效。具有吸附和抗菌性能的壳聚糖基冷冻凝胶在染料废水修复方面具有很大的潜力。
