Nanofiltration (NF) with adsorptive membrane technologies are one of the most promising methods for the efficient treatment of industrial wastewater having toxic heavy metal ions. The present investigation deals with the fabrication of nanocomposite Fe₃O₄@MXene membranes by self‐assembly of Fe₃O₄ nanoparticles (NPs) and two‐dimensional (2D) MXene nanosheets on the surface of cellulose acetate (CA) base membrane. The Fe₃O₄ NPs were found to be uniformly dispersed on the MXene sheet structure and thus expanded the 2D nanochannel of MXene. The water flux and the removal ratio of heavy metal ions by this nanocomposite membrane were found to improve significantly, compared to the virgin MXene membrane. Under the synergistic effect of layer sieving and the adsorption ability, the composite NF membrane was found to achieve a maximum of 63.2% for Cu²⁺, 64.1% for Cd²⁺ and 70.2% for Cr⁶⁺ removal from wastewater, respectively. Moreover, Fe₃O₄@MXene membrane also exhibited good recycling ability after washing by HCl solution.

中文翻译：

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Fe3O4 @ MXene复合纳滤膜的去除废水中重金属离子的构建

带有吸附膜技术的纳滤（NF）是有效处理具有毒性重金属离子的工业废水的最有前途的方法之一。本研究涉及通过在醋酸纤维素（CA）基膜表面上自组装Fe ₃ O ₄纳米颗粒（NPs）和二维（2D）MXene纳米片，来制备纳米复合Fe ₃ O ₄ @MXene膜。铁₃ O ₄发现NP均匀地分散在MXene片状结构上，并因此扩展了MXene的2D纳米通道。与纯MXene膜相比，发现该纳米复合膜的水通量和重金属离子去除率显着提高。在层筛和吸附能力的协同作用下，复合NF膜对废水中Cu ^2+的去除率最高为63.2 ％，Cd ^2+的去除率最高为64.1 ％，Cr ^6+的去除率最高为70.2％。而且，Fe ₃ O ₄ @MXene膜在用HCl溶液洗涤后也表现出良好的回收能力。