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以尺寸与人体肠道病毒相近的f2噬菌体作为模型病毒,本研究采用膜吸附反应器(Membrane adsorption reactor,MAR),考察膜分离与纳米TiO2耦合工艺对饮用水中病毒的去除效果.两种不同孔径的PVDF(0.20μm)、PAN(0.05μm)平板膜在自来水体系中对f2噬菌体的截留效果分别为1.88～2.56log和4.78～5.95log,大大超过理论计算值,这与膜具有不规则孔型的重叠筛网状结构直接相关.吸附实验结果表明,纳米TiO2对f2噬菌体的吸附在60min内即可达到吸附平衡,符合Freundlich等温吸附模型qe=27.4·ce1.24.两组MAR系统对f2噬菌体的总去除率分别高达3.88log与6.40log,这主要是由于纳米TiO2的吸附作用,以及运行中在膜表面形成有效的滤饼层.纳米材料与膜系统的耦合既保持了系统对病毒的高效去除,又实现了纳米颗粒的有效分离回收,操作简单、费用低.
Taking phage f2, which is similar in size to human enteroviruses, as a model virus, Membrane adsorption reactor (MAR) was used in this study to investigate the effect of membrane separation and nano-TiO2 coupling on virus removal in drinking water. The retention of f2 phage with pore sizes of PVDF (0.20μm) and PAN (0.05μm) plates in tap water system were 1.88 ~ 2.56log and 4.78 ~ 5.95log, respectively, much higher than the theoretical value. Type overlapped mesh structure.The results of adsorption experiments showed that adsorption of f2 phage by nano-TiO2 can reach adsorption equilibrium within 60min, which accords with the Freundlich isotherm model qe = 27.4 · ce1.24. The total phage removal rates were up to 3.88log and 6.40log, respectively, mainly due to the adsorption of nano-TiO2 and the formation of an effective filter cake layer on the membrane surface during operation.The coupling of nanomaterials to the membrane system not only kept the system against virus Efficient removal, but also to achieve the effective separation of nanoparticles recovery, simple operation, low cost.