State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China; State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing 210046, China.
J Hazard Mater. 2019 Mar 5;365:312-321. doi: 10.1016/j.jhazmat.2018.11.013. Epub 2018 Nov 7.
Multifunctional ultrafiltration membranes need to be further developed with ultrafiltration performance and high multifunctional decontamination efficiency. Here, the MIL-PVDF multifunctional ultrafiltration membrane with ultrahigh MIL loading was demonstrated by a new blending method of predispersion in acetone and thermally induced phase separation. Due to the improved dispersity and restriction of pore size, the MIL-53(Fe) mass loading was as high as approximately 61%. The new membrane showed high performance for methylene blue (MB) removal and maintained high permeability and ultrafiltration efficiency. The characteristics of the membranes were analyzed to explain the above advantages. Meanwhile, compared to the traditional blend ultrafiltration membrane, the 67-MIL-PVDF membrane showed an 9-fold increase in effective treatment volume for more than 75% MB removal. The contribution and efficiency of adsorption and catalytic oxidation were analyzed and explained. The relationship between them was confirmed as being independent, and the reasons for this independence were proposed. Additionally, the mechanism of multifunctional decontamination and permeability by MIL-PVDF membranes was proposed. Moreover, the 67-MIL-PVDF membrane was also suitable for long-term run and real wastewaters treatment. In conclusion, this study sheds new light on the preparation strategy for multifunctional blend ultrafiltration membranes with ultrahigh particles loading displaying high decontamination and permeability performance.
多功能超滤膜需要进一步开发，以提高超滤性能和多功能去污效率。在这里，通过在丙酮中预分散和热致相分离的新共混方法，展示了具有超高 MIL 负载的 MIL-PVDF 多功能超滤膜。由于分散性得到改善和孔径的限制，MIL-53(Fe)的质量负载高达约 61%。新膜对亚甲基蓝（MB）的去除表现出高性能，同时保持高渗透性和超滤效率。对膜的特性进行了分析，以解释上述优点。同时，与传统的共混超滤膜相比，67-MIL-PVDF 膜在超过 75%的 MB 去除率下，有效处理量增加了 9 倍。分析并解释了吸附和催化氧化的贡献和效率。证实了它们之间的关系是独立的，并提出了这种独立性的原因。此外，还提出了 MIL-PVDF 膜的多功能去污和渗透性的机制。此外，67-MIL-PVDF 膜也适用于长期运行和实际废水处理。总之，本研究为制备具有超高颗粒负载的多功能共混超滤膜提供了新的思路，该膜具有高去污和渗透性性能。
