Here the fabrication of a novel PVA/CMC/halloysite nanoclay membrane for the effective adsorption of cationic dye (methylene blue, MB) from aqueous environment is reported. The membranes were analyzed through scanning electron microscopy (SEM), optical microscopy (OM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), contact angle and universal testing machine (UTM) analysis. The adsorption behavior of the membrane in terms of nanoclay loading, contact time, initial concentration of MB, pH and temperature were also discussed. The membrane exhibits excellent removal efficiency (99.5%) for MB in the optimal conditions such as nanoclay dose = 6 wt%, initial dye concentration = 10 ppm, contact time = 240 min, pH = 10 and temperature = 30 °C. Three isotherm models (Freundlich, Langmuir and Temkin) were employed to analyze the dye adsorption data. The results revealed that the adsorption process could be described well with both Freundlich and Langmuir isotherm model. The kinetics of MB adsorption onto membrane follows pseudo-second-order model while thermodynamic parameter indicate that adsorption is feasible and endothermic in nature. The antibacterial studies revealed that the PVA/CMC/halloysite nanoclay membrane possess notable antibacterial property. Finally, the desorption studies showed that the membrane have good reusability even after four recycles.

本文报道了一种新型 PVA/CMC/埃洛石纳米粘土膜的制备，用于有效吸附水环境中的阳离子染料（亚甲基蓝，MB）。通过扫描电子显微镜（SEM）、光学显微镜（OM）、傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、热重分析（TGA）、接触角和万能试验机（UTM）对膜进行分析） 分析。还讨论了膜在纳米粘土负载量、接触时间、MB 初始浓度、pH 和温度方面的吸附行为。在最佳条件下，例如纳米粘土剂量 = 6 wt%、初始染料浓度 = 10 ppm、接触时间 = 240 分钟、pH = 10 和温度 = 30 °C，该膜对 MB 表现出优异的去除效率 (99.5%)。采用三种等温线模型（Freundlich、Langmuir 和 Temkin）来分析染料吸附数据。结果表明，Freundlich 和 Langmuir 等温模型都能很好地描述吸附过程。 MB在膜上的吸附动力学遵循准二阶模型，而热力学参数表明吸附是可行的并且本质上是吸热的。抗菌研究表明PVA/CMC/埃洛石纳米粘土膜具有显着的抗菌性能。最后，解吸研究表明，即使经过四次回收，膜仍具有良好的可重复使用性。