In this work, we examined ZSM-5 zeolite loaded polyvinyl alcohol-carboxymethyl cellulose-sodium alginate (PVA/CMC/SA) membrane for cationic dye (malachite green, MG) removal from aqueous environment. The crystallinity, chemical composition, surface morphology, hydrophilicity and thermal property of PVA/CMC/SA/ZSM-5 membrane was evaluated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), optical microscopy (OM), contact angle and thermogravimetric analysis (TGA) respectively. The successful incorporation of zeolite into PVA/CMC/SA membrane was confirmed by XRD, FT IR and SEM. TGA and contact angle measurement indicates that zeolite loaded PVA/CMC/SA membrane showed superior thermal stability and hydrophobicity than plain PVA/CMC/SA membrane. A series of adsorption studies was conducted to evaluate the influence of operational parameters such as initial dye concentration, zeolite dosage, contact time, temperature and pH on the dye (MG) adsorption behaviour of the prepared membrane. A maximum dye removal percentage (99.12%) was achieved at an initial dye concentration of 10 ppm, zeolite dosage-5 wt%, pH = 10 and temperature-25 °C. The kinetic studies revealed that adsorption of MG on PVA/CMC/SA/ZSM-5 membrane follows pseudo-second-order model while Freundlich isotherm model was founded to be the best isotherm model to describe the adsorption process. The results thus indicate a multilayer adsorption of MG on PVA/CMC/SA/ZSM-5 membrane. Finally, the recyclability test revealed that the membrane exhibits good recycle efficiency and is stable after 5 recycle.

在这项工作中，我们检查了ZSM-5沸石负载的聚乙烯醇-羧甲基纤维素-海藻酸钠（PVA / CMC / SA）膜从水性环境中去除阳离子染料（孔雀石绿，MG）的能力。使用X射线衍射（XRD），傅里叶变换红外光谱（FT-IR），扫描电子显微镜（SEM）评估PVA / CMC / SA / ZSM-5膜的结晶度，化学组成，表面形态，亲水性和热性能），光学显微镜（OM），接触角和热重分析（TGA）。XRD，FT IR和SEM证实了将沸石成功掺入PVA / CMC / SA膜中。TGA和接触角测量表明，负载沸石的PVA / CMC / SA膜显示出比普通PVA / CMC / SA膜优异的热稳定性和疏水性。进行了一系列吸附研究，以评估操作参数（如初始染料浓度，沸石用量，接触时间，温度和pH值）对所制备膜的染料（MG）吸附行为的影响。在初始染料浓度为10 ppm，沸石用量为5 wt％，pH = 10且温度为25°C时，可获得最大的染料去除率（99.12％）。动力学研究表明，MG在PVA / CMC / SA / ZSM-5膜上的吸附遵循伪二级模型，而Freundlich等温模型被认为是描述吸附过程的最佳等温模型。结果因此表明MG在PVA / CMC / SA / ZSM-5膜上的多层吸附。最后，可回收性测试表明该膜表现出良好的回收效率，并在5次回收后保持稳定。