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采用介孔SBA-15作添加剂,以聚砜(PSF)为复合膜本体材料制备PSF/SBA-15超滤复合膜,考察了SBA-15的添加对复合膜微观结构的影响,研究了不同SBA-15添加量的复合膜渗透性能与分离性能的变化规律,并以水厂沉后水作为处理对象,考察了不同SBA-15添加量的超滤复合膜对污染物的去除效能以及产水稳定性。结果表明:与未添加SBA-15的对照组相比,PSF/SBA-15复合膜的孔隙结构更加发达,过滤性能大幅提升,对污染物的去除效果明显提高。当SBA-15添加量为6%时,复合膜过滤性能最强,对沉后水中浊度、细菌总数、COD_(Mn)和UV_(254)的去除率分别达到99.8%、100%、16.3%和31.2%;在沉后水过滤试验进行5个循环后,复合膜的水通量仍然可以保持在63.1 L/(m~2·h),是对照组的5.74倍。该新型介孔超滤复合膜制备方法的提出,为超滤膜工艺在实际工程中高通量、低成本的运行提供了技术支撑。
The effects of SBA-15 addition on the microstructure of the composite membrane were investigated by using mesoporous SBA-15 as additive and PSF / PSF-SBA-15 composite membrane as the bulk material. The effects of different SBA- -15 added amount of the composite membrane permeability and separation performance of the law of variation, and water after sinking water as the object of treatment with different SBA-15 added amount of ultrafiltration membrane removal efficiency of pollutants and water production stability Sex. The results showed that compared with the control group without SBA-15, the pore structure of PSF / SBA-15 composite membrane was more developed, the filtration performance was significantly improved, and the removal efficiency of pollutants was significantly improved. When the content of SBA-15 was 6%, the composite membrane had the strongest filtration performance, and the turbidity, total bacteria, COD Mn and UV 254 removal rate were 99.8%, 100% and 16.3% respectively. And 31.2%, respectively. After 5 cycles of sedimentation water filtration test, the water flux of the composite membrane can still be maintained at 63.1 L / (m ~ 2 · h), which is 5.74 times of that of the control group. The proposed method for preparing the new mesoporous ultrafiltration composite membrane provides the technical support for the high-throughput and low-cost operation of the ultrafiltration membrane technology in practical engineering.