Universiti Sains Malaysia Seri Ampangan, Penang, Malaysia.
Water Sci Technol. 2013;67(9):2102-9. doi: 10.2166/wst.2013.098.
Although ultrafiltration (UF) membranes are applicable in wastewater and water treatment, most UF membranes are hydrophobic and susceptible to severe fouling by natural organic matter. In this work, polysulfone (PSf) membrane was blended with silicaluminophosphate (SAPO) nanoparticles, SAPO-34, to study the effect of SAPO-34 incorporation in humic acid (HA) fouling mitigation. The casting solution was prepared by blending 5-20 wt% of SAPO-34 nanoparticles into the mixture of PSf, 1-methyl-2-pyrrolidinone and polyvinyl alcohol at 75 °C. All membrane samples were then prepared using the phase inversion method. Blending SAPO-34 zeolite into PSf membranes caused augmentation in surface hydrophilicity and pore size, leading to higher water permeation. In the HA filtration test, mixed matrix membranes (MMMs) with SAPO-34 zeolite showed reduced HA fouling initiated from pore blocking. The MMM with 20 wt% SAPO-34 loading exhibited the highest increment of water permeation (83%) and maintained about 75% of permeate flux after 2.5 h. However, the SAPO-34 fillers agglomerated in the PSf matrix and induced macrovoid formation on the membrane surface when excessive zeolite was added.
虽然超滤 (UF) 膜可应用于废水和水处理，但大多数 UF 膜是疏水性的，容易受到天然有机物的严重污染。在这项工作中，聚砜 (PSf) 膜与硅铝磷酸盐 (SAPO) 纳米颗粒 SAPO-34 共混，研究了 SAPO-34 掺入对减轻腐殖酸 (HA) 污染的影响。铸膜液由 PSf、1-甲基-2-吡咯烷酮和聚乙烯醇在 75°C 下共混 5-20wt% 的 SAPO-34 纳米颗粒制备而成。然后使用相转化法制备所有膜样品。将 SAPO-34 沸石共混到 PSf 膜中会导致表面亲水性和孔径增加，从而提高水渗透性。在 HA 过滤测试中，含有 SAPO-34 沸石的混合基质膜 (MMM) 显示出从孔阻塞引起的 HA 污染减少。负载 20wt% SAPO-34 的 MMM 表现出最高的水渗透增量（83%），并且在 2.5 小时后仍保持约 75%的渗透通量。然而，当加入过多的沸石时，SAPO-34 填料在 PSf 基质中聚集并在膜表面诱导大孔形成。
