†School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798.
‡Singapore Membrane Technology Centre, Nanyang Technological University, Singapore 639798.
Environ Sci Technol. 2015 Apr 7;49(7):4690-5. doi: 10.1021/es504164w. Epub 2015 Mar 19.
For the first time, forward osmosis (FO) was performed using a porous membrane with an ultrafiltration (UF)-like rejection layer and its feasibility for high performance FO filtration was demonstrated. Compared to traditional FO membranes with dense rejection layers, the UF-like FO membrane was 2 orders of magnitude more permeable. This gave rise to respectable FO water flux even at ultralow osmotic driving force, for example, 7.6 L/m(2).h at an osmotic pressure of merely 0.11 bar (achieved by using a 0.1% poly(sodium 4-styrene-sulfonate) draw solution). The membrane was applied to oil/water separation, and a highly stable FO water flux was achieved. The adoption of porous FO membranes opens a door to many new opportunities, with potential applications ranging from wastewater treatment, valuable product recovery, and biomedical applications. The potential applications and implications of porous FO membranes are addressed in this paper.
首次采用具有超滤（UF）类似截留层的多孔膜进行正向渗透（FO），并证明了其在高性能 FO 过滤中的可行性。与具有致密截留层的传统 FO 膜相比，UF 类似 FO 膜的渗透性高 2 个数量级。这使得即使在超低渗透压下，FO 水通量也相当可观，例如在渗透压仅为 0.11 巴（通过使用 0.1%的聚（对苯乙烯磺酸钠）汲取液实现）的情况下，水通量为 7.6 L/（m²·h）。该膜还应用于油水分离，并实现了高度稳定的 FO 水通量。多孔 FO 膜的采用为许多新的应用打开了大门，其潜在应用范围包括废水处理、有价值产品的回收以及生物医学应用。本文探讨了多孔 FO 膜的潜在应用和影响。
