摘要：
比较了3种蛋白质引起的膜通量变化及膜污染情况,利用xDLVO理论分析了蛋白质超滤过程中的界面作用能对膜污染机制的影响。结果表明,卵清蛋白(Ovalbumin,OVA)造成的膜污染最严重,其次是牛血清白蛋白(Bovine Serum Albumin,BSA)和溶菌酶(Lysozyme,LYS);在黏附阶段和黏聚阶段,极性力自由能起主导作用,范德华力和双电层力对其贡献很小;蛋白质分子从远距离逐渐接近UF膜或滤饼层时,极性力作用能对膜污染起主导作用,总界面作用能和作用范围是影响膜污染趋势的主要因素。
关键词:
超滤,
蛋白质,
膜污染,
xDLVO理论,
界面作用
Abstract:
The situations of membrane flux change and membrane fouling caused by three kinds of proteins are compared. The influences of interfacial action energy on membrane fouling mechanisms in protein ultrafiltration process are analyzed by xDLVO theory. The results show that the membrane fouling caused by ovalbumin(OVA)is the most serious one,and the ones caused by bovine serum albumin(BSA) and lysozyme(LYS) are the next serious. The interfacial free energy of acid-base both play a dominant role in adhesion stage and cohesive stage,but the contributions made by van der waals force and electrostatic double layer force are very little. When the protein molecules get closer gradually to the UF membrane or cake layer from a long distance,the interfacial action energy of acid-base can play a dominant role in membrane fouling. The main factors affecting membrane fouling trends are the total interfacial action energy and the range of the action.
Key words:
ultrafiltration,
protein,
membrane fouling,
extended Derjaguin-Landau-Verwey-Overbeek(xDLVO) theory,
interfacial action
中图分类号:
冯萃敏, 张欣蕊, 孙丽华, 田海龙, 葛俊男, 陈雪如, 张雅君. 蛋白质与超滤膜界面作用能对膜污染机制的影响[J]. 工业水处理, 2016, 36(6): 33-37,42.
Feng Cuimin, Zhang Xinrui, Sun Lihua, Tian Hailong, Ge Junnan, Chen Xueru, Zhang Yajun. Influences of interfacial action energy between protein and UF membrane on membrane fouling mechanisms[J]. INDUSTRIAL WATER TREATMENT, 2016, 36(6): 33-37,42.