介孔SBA-15掺杂聚砜超滤复合膜的制备与性能研究

发布时间：2018-02-13 22:14

本文关键词： 超滤介孔SBA- 聚砜复合膜除污效能　出处：《中国给水排水》2017年13期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:PSF/SBA-15 ultrafiltration composite membrane was prepared by using mesoporous SBA-15 as additive and polysulfone as bulk material. The effect of SBA-15 addition on the microstructure of composite membrane was investigated. The changes of permeability and separation performance of composite membrane with different SBA-15 content were studied, and the water after settling in water plant was taken as the treatment object. The removal efficiency of pollutants and the stability of water production of ultrafiltration composite membrane with different SBA-15 content were investigated. The results showed that compared with the control group without SBA-15, the pore structure of PSF / SBA-15 composite membrane was more developed, and the filtration performance was greatly improved. When the amount of SBA-15 added is 6, the filtration performance of the composite membrane is the strongest, and the removal rates of turbidity, total number of bacteria and UVSP 254) in the settling water are 99.8% and 16.3% and 31.2%, respectively. The water flux of the composite membrane can still be kept at 63.1 L / m ~ (2) 路h ~ (-1), which is 5.74 times of that of the control group. This new preparation method of Kong Chao filter composite membrane provides technical support for the high throughput and low cost operation of the ultrafiltration membrane process in practical engineering.
【作者单位】：哈尔滨工业大学市政环境工程学院城市水资源与水环境国家重点实验室;
【基金】：国家高技术研究发展计划(863)项目(SS2012AA062902) 国家自然科学基金资助项目(51508829)
【分类号】：TQ051.893;TU991.2

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