摘要
针对截留分子质量和材质对浸没式超滤膜处理微污染地表水过滤性能的影响问题,研究了两者对膜去除水中颗粒物和有机污染物的特性及其对膜污染的影响。结果表明,随着膜截留分子质量的减小,超滤膜对浊度和各有机物指标的去除率逐渐升高,但超滤膜对溶解性有机物的去除率较低;不同材质的超滤膜对有机物的去除率存在差异。不同截留分子质量和材质的超滤膜过滤原水时的污染程度不同,截留分子质量较小的超滤膜污染程度较轻,但容易引起不可逆膜污染;聚砜(PS)膜抗污染的能力要强于聚偏氟乙烯(PVDF)和聚氯乙烯(PVC)膜,在实际应用中应根据不同水质特点合理选择超滤膜的截留分子质量和材质。
Effect of different cutoffmolecular weights and materials on the particulates and organic pollutants removal by immersed ultrafiltration （UF） membrane for polluted surface water was studied and the membrane fouling was also investigated. Results show that the removal efficiency of turbidity and organic matters was increased gradually with the decrease of membrane molecular weight cutoff, while the removal of dissolved organic matters by ultrafiltration is not effective. The removal of organic matters by UF membranes with different materials is different, indicating that different membrane materials and organic matters might interact with each other. The membrane fouling with different materials and eutoffmoleeular weights is dissimilar too. Fouling of Membrane with larger cutoff molecular weights was more serious than that of the less cutoff molecular weights which would get irreversible fouled by organics more easily. The ability of resisting organic fouling by PS material is better than PVDF and PVC membrane, and the cutoff molecular weight and material of UF membrane should be selected reasonably according to the water quality and other conditions in application.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第6期7-10,共4页
Technology of Water Treatment
基金
国家自然科学基金资助项目(50808051)
关键词
截留分子质量
材质
浸没式超滤膜
有机物
膜污染
cutoff molecular weights
materials
immersed UF membrane
organic matters
membrane fouling
