Key Laboratory of Polymer Materials and Products of Universities in Fujian, College of Materials Science and Engineering, Fujian University of Technology, Fuzhou, Fujian 350002, China.
Key Laboratory of Polymer Materials and Products of Universities in Fujian, College of Materials Science and Engineering, Fujian University of Technology, Fuzhou, Fujian 350002, China.
Int J Biol Macromol. 2024 Jun;271(Pt 1):132355. doi: 10.1016/j.ijbiomac.2024.132355. Epub 2024 May 15.
In this paper, a novel programable sewage-cleaning technology for the regeneration of antibacterial nanocomposites via the removal of wastewater pollutants is presented. Montmorillonite (MMT) was encapsulated in poly(vinyl alcohol) (PVA)-enhanced chitosan (CTS) hydrogels to form MMT-loaded nanocomposite biofilms (PCM). The PCM nanocomposite biofilms exhibited increased breaking strength and elongation at break, by factors of approximately 1.38 and 1.40, respectively, compared with those of the pure PVA/CTS biofilms. The maximum adsorption capacity of the PCM nanocomposite biofilms toward tetracycline and Ag(I) is 275.0 and 567.0 mg/g, respectively. The adsorbed nanocomposite biofilms exhibited excellent antibacterial properties against Staphylococcus aureus and Escherichia coli. Meanwhile, the nanocomposite also showed an effective adsorption capacity toward other toxic components, where the highest adsorption capacity is 2748.0 mg/g (for methyl blue). The simulation results indicated that the adsorption behaviors of the malachite green, neutral red, methyl blue, tetracycline, Cu(II), Zn(II), and Ag(I) by the PCM nanocomposite biofilms followed pseudo-second-order kinetic and Freundlich isotherm models. Furthermore, the PCM nanocomposite biofilms are stable in PBS solution but degradable in lysozyme-containing PBS solution, suggesting their potential application in the wastewater treatment as well as antibacterial fields.
本文提出了一种新颖的可编程污水净化技术，通过去除废水中的污染物来再生抗菌纳米复合材料。蒙脱土（MMT）被包裹在聚（乙烯醇）（PVA）增强壳聚糖（CTS）水凝胶中，形成负载 MMT 的纳米复合生物膜（PCM）。与纯 PVA/CTS 生物膜相比，PCM 纳米复合生物膜的断裂强度和断裂伸长率分别提高了约 1.38 和 1.40 倍。PCM 纳米复合生物膜对四环素和 Ag（I）的最大吸附容量分别为 275.0 和 567.0 mg/g。吸附的纳米复合生物膜对金黄色葡萄球菌和大肠杆菌表现出优异的抗菌性能。同时，该纳米复合材料对其他有毒成分也表现出有效的吸附能力，其最大吸附容量为 2748.0 mg/g（用于亚甲蓝）。模拟结果表明，孔雀石绿、中性红、亚甲蓝、四环素、Cu（II）、Zn（II）和 Ag（I）在 PCM 纳米复合生物膜上的吸附行为遵循准二级动力学和 Freundlich 等温线模型。此外，PCM 纳米复合生物膜在 PBS 溶液中稳定，但在含有溶菌酶的 PBS 溶液中可降解，表明其在废水处理和抗菌领域具有潜在的应用。
