Cu-NWs/RGO/PVDF导电微滤膜的制备及其抗污染性能

将铜纳米线(Cu-NWs)和还原氧化石墨烯(RGO)作为添加剂，通过相转化法制备了具有高亲水性和高导电性的Cu-NWs/RGO/PVDF导电微滤膜，将其作为膜阴极放入MFC-MBR耦合系统中且连续运行120 d，研究了其对生活污水的处理效果及抗污染性能。结果表明，Cu-NWs/RGO/PVDF膜与水的界面作用自由能为28.49 mJ·m⁻²，欧姆内阻和活化内阻分别为1.18 Ω和2.82 Ω，说明其具备优良的亲水性和导电性。与对照系统(C-MBR)相比，MFC-MBR耦合系统出水水质更优，系统中SMP和LB-EPS含量更低，膜污染速率更低。利用XDLVO理论结合表面元素集合法对MFC-MBR耦合系统中膜污染机理进行了分析，发现MFC-MBR系统中膜与SMP、LB-EPS和污泥絮体之间的相互作用能更低，从而降低了膜污染速率。

Preparation of Cu-NWs/RGO/PVDF conductive microfiltration membrane and its anti-pollution performance

In this study, the copper nanowires (Cu-NWs) and reduced graphene oxide (RGO) was taken as additives, and a novel conductive microfiltration membrane (Cu-NWs/RGO/PVDF) with high hydrophilicity and conductivity was prepared by phase inversion method. This Cu-NWs/RGO/PVDF conductive microfiltration membrane was used as a membrane cathode in the MFC-MBR coupling system which continuously run for 120 days, its sewage treatment effect and anti-pollution performance were studied accordingly. The results show that, the free energy of the interface between the Cu-NWs/RGO/PVDF membrane and water was 28.49 mJ·m−2, and the ohmic internal resistance and activated internal resistance were 1.18 Ω and 2.82 Ω, respectively, indicating that this membrane had excellent hydrophilicity and conductivity. Compared with the control system (C-MBR), the effluent quality of the MFC-MBR coupling system was better, and the contents of SMP and LB-EPS in this coupling system were lower, and the membrane fouling rate significantly decreased. Through membrane fouling mechanism analysis based on XDLVO theory combined with surface element collection method, the interaction energies between the membrane and SMP, LB-EPS and sludge flocs in the MFC-MBR system were lower, thereby reducing the rate of membrane fouling.