膜科学与技术

纳滤膜材质对高含盐体系中有机物截留性能的影响研究

作者：孙宝红，笪晓薇，范益群

单位：南京工业大学化学化工学院, 材料化学工程国家重点实验室, 南京 210009

关键词：纳滤; 高含盐体系; 截留性能

出版年,卷(期):页码： 2015,35(2):14-19

摘要：

为获得纳滤膜材质对高含盐体系中有机物截留性能的影响规律, 采用截留分子量相近的有机纳滤膜和陶瓷纳滤膜对模拟高含盐体系中有机物的截留性能进行研究比较, 考察运行时间、盐浓度、跨膜压差、有机物浓度等因素对截留效果的影响. 结果表明, 两种纳滤膜运行30 min后截留性能即可稳定; 随着盐浓度的增加, 膜的渗透通量和膜对有机物的截留率都下降, 其中陶瓷纳滤膜对有机物的截留效果优于有机纳滤膜; 有机物浓度和跨膜压差对两种膜的截留性能影响较小. 因此, 在高含盐体系中, 截留分子量相近的陶瓷纳滤膜相比于有机纳滤膜，前者具有更大的通量和更高的有机物截留率.

In order to obtain the law of nanofiltration membrane materials influence on the organic retention in high salinity system, the retention of organics was investigated by organic nanofiltration membrane and ceramic nanofiltration membrane with similar molecular weight cut-off(MWCO). The effects of running time, salt concentration, transmembrane pressure(TMP), organic concentration on retention of organics were discussed. The results indicated that the membrane retention properties could achieve stability after 30 minutes. The permeate flux and retention properties of organics gradually reduced with the increase of salt concentration, and retention properties of ceramic membrane was better than that of organic membrane. The organic concentration and TMP had a weak effect on retention properties of the membranes. Therefore, ceramic nanofiltration membrane has higher permeate flux and organic retention in high salinity system compared to organic nanofiltration membrane.

孙宝红(1989-),女,安徽滁州市人,硕士,研究方向为膜分离.

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