Ceramic-supported-polymeric (CSP) composite membranes combine the benefits of robust ceramic support with tunable surface properties of polymeric active layer. The present work reports the fabrication of novel CSP composite nanofiltration membranes wherein surface ionization of the membrane active layers has been carried out by a facile process of chelating copper ions with the crosslinked polyethyleneimine polymer matrix of membrane top layer. Different concentrations of copper chloride solutions were used and their effect on membrane surface properties was investigated using EDX, XPS and AFM analyses. Performance of the membranes in removal of both cationic and anionic heavy metals, namely, Ni(II), Cd(II), Pb(II), Zn(II), As(V) and Cr(VI) from aqueous solution was studied. Excellent removal (> 95%) of all the heavy metals and optimum flux was achieved in case of GPCu0.5 membrane (surface modified with 0.5 wt% copper chloride solution). No significant decrease in flux and rejection rate of the membrane during 10 h high pressure (8 bar) operation suggested longevity of the membrane. The slow release of copper ions indicated the much-expected anti-biofouling nature of the membrane. Appreciable rejection behavior of the copper ion enhanced CSP composite membrane towards multiple heavy metals demonstrates its potential for practical water treatment application.

陶瓷支撑聚合物 (CSP) 复合膜结合了坚固陶瓷支撑的优点和聚合物活性层的可调表面特性。目前的工作报告了新型 CSP 复合纳滤膜的制造，其中膜活性层的表面电离是通过将铜离子与膜顶层的交联聚乙烯亚胺聚合物基质螯合的简便方法进行的。使用了不同浓度的氯化铜溶液，并使用 EDX、XPS 和 AFM 分析研究了它们对膜表面特性的影响。研究了膜从水溶液中去除阳离子和阴离子重金属，即 Ni(II)、Cd(II)、Pb(II)、Zn(II)、As(V) 和 Cr(VI) 的性能. 去除效果极佳 (> 在 GPCu0.5 膜（表面用 0.5 wt% 氯化铜溶液改性）的情况下，达到了所有重金属的 95% 和最佳通量。在 10 小时高压（8 巴）操作期间，膜的通量和截留率没有显着降低，这表明膜的使用寿命。铜离子的缓慢释放表明膜具有备受期待的抗生物污染性质。铜离子增强型 CSP 复合膜对多种重金属的显着排斥行为证明了其在实际水处理应用中的潜力。铜离子的缓慢释放表明膜具有备受期待的抗生物污染性质。铜离子增强型 CSP 复合膜对多种重金属的显着排斥行为证明了其在实际水处理应用中的潜力。铜离子的缓慢释放表明膜具有备受期待的抗生物污染性质。铜离子增强型 CSP 复合膜对多种重金属的显着排斥行为证明了其在实际水处理应用中的潜力。