Abstract Membrane separation processes are an efficient method to manage the amount of wastewater improperly discharged into water due the use of dyes in industrial processes. Thus, polyethersulfone microfiltration membranes were modified with sulfuric acid, titanium dioxide (TiO2) and graphene oxide (GO) solutions by layer-by-layer self-assembly method via electrostatic interaction through a pressure-assisted filtration system. The characterization indicated that the proposed modification was successfully accomplished. The effect of TiO2 and GO masses deposited on the membrane surface was studied. MFTD1.0+GO2.5 membrane showed the best performance among synthesized series achieving a red bordeaux (BR) dye removal of 93.35 % and a flux recovery ratio of > 80 %. The treatment of dyes twilight yellow (TY) and safranin orange (SO) was investigated in this membrane achieving a rejection rate of 69.98 and 100 %, respectively. For dyes with high removal rates (BR and SO), other filtration cycles were performed and good results were accomplished. The proposed modification resulted in an efficient treatment of dyes with different characteristics as well as improvement of selectivity and antifouling properties of the membranes. Their reuse potential represents an additional environmental advantage of this process.

中文翻译：

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通过逐层自组装方法使膜表面功能化以去除染料

摘要 膜分离过程是一种有效的方法，可以管理因工业过程中使用染料而不当排放到水中的废水量。因此，聚醚砜微滤膜通过压力辅助过滤系统通过静电相互作用通过逐层自组装方法用硫酸、二氧化钛（TiO2）和氧化石墨烯（GO）溶液改性。表征表明所提议的修改已成功完成。研究了沉积在膜表面上的 TiO2 和 GO 质量的影响。MFTD1.0+GO2.5 膜在合成系列中表现出最佳性能，实现了 93.35% 的波尔多红 (BR) 染料去除率和 > 80% 的通量回收率。在该膜中研究了染料暮光黄 (TY) 和番红橙 (SO) 的处理，分别实现了 69.98% 和 100% 的截留率。对于去除率高的染料（BR 和 SO），进行了其他过滤循环并取得了良好的结果。拟议的修改导致对具有不同特性的染料的有效处理以及膜的选择性和防污性能的提高。它们的再利用潜力代表了该过程的额外环境优势。拟议的修改导致对具有不同特性的染料的有效处理以及膜的选择性和防污性能的提高。它们的再利用潜力代表了该过程的额外环境优势。拟议的修改导致对具有不同特性的染料的有效处理以及膜的选择性和防污性能的提高。它们的再利用潜力代表了该过程的额外环境优势。