There is a growing demand for heavy metal removal by membrane technology in real applications. However, few studies were reported concerning antimony (Sb) removal by membrane technology. Herein, a novel thin film nanocomposite (TFN) membrane comprising an alginate (SA) selective layer and a polyether sulfone (PSF) support membrane incorporating chitosan functionalized iron nanocomposite has been firstly developed for Sb removal via electrostatic self-assembly. The support matrix membrane contained iron nanocomposite (denoted as CIM) retained high water flux and porosity, and it reached a maximum removal capacity of 16.5 and 13.6 mg/g for Sb(III) and Sb(V) with nanofiller loading rate of 20% during static experiments, respectively. The coated SA top layer endowed the hybrid membrane (denoted as SA-CIM) to have a lower membrane flux, and have stronger retention abilities for Sb species than that by CIM during dynamic filtration experiments. The SA-CIM membranes also possess tolerable reversibility towards Sb removal. Benefiting from the negatively-charged dense selective layer and high adsorption capacity of the iron nanocomposites, the SA-CIM membranes demonstrated an enhanced removal capacity for Sb species via steric hindrance effect, electrostatic repulsion and adsorption. Our study offers a simple method to remove Sb by a novel polysaccharide functionalized hybrid membrane.

在实际应用中，通过膜技术去除重金属的需求不断增长。但是，很少有报道涉及通过膜技术去除锑的研究。在本文中，首先开发了一种新颖的薄膜纳米复合材料（TFN）膜，该膜包含藻酸盐（SA）选择层和结合了壳聚糖功能化铁纳米复合物的聚醚砜（PSF）支撑膜，用于通过静电自组装去除Sb。含有铁纳米复合材料（称为CIM）的支撑基质膜保留了高的水通量和孔隙率，其对Sb（III）和Sb（V）的最大去除能力达到16.5和13.6 mg / g，纳米填料的填充率达到20％在静态实验中 涂层的SA顶层赋予混合膜（称为SA-CIM）较低的膜通量，在动态过滤实验中，与CIM相比，对Sb的保留能力更强。SA-CIM膜在去除Sb方面也具有可逆性。得益于带负电的致密选择层和铁纳米复合材料的高吸附能力，SA-CIM膜通过空间位阻效应，静电排斥和吸附显示出对Sb物种的去除能力增强。我们的研究提供了一种通过新型多糖功能化杂化膜去除Sb的简单方法。SA-CIM膜通过空间位阻效应，静电排斥和吸附显示出对Sb物质的去除能力增强。我们的研究提供了一种通过新型多糖功能化杂化膜去除Sb的简单方法。SA-CIM膜通过空间位阻效应，静电排斥和吸附显示出对Sb物质的去除能力增强。我们的研究提供了一种通过新型多糖功能化杂化膜去除Sb的简单方法。