纳滤膜和反渗透膜去除水中四环素的性能  

Membrane Performance in Tetracycline Removal Process by Nanofiltration and Reverse Osmosis

作　　者：李伟英[1] 陆辉[2] 李平波[2] 石恬恬[2] 

机构地区：[1]同济大学长江水环境教育部重点实验室,上海200092 [2]同济大学环境科学与工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2013年第5期735-741,共7页Journal of Tongji University:Natural Science

基　　金：污染控制与资源化研究国家重点实验室自主课题(PCRRY09004);科技部国际合作项目(S2011ZR0434)

摘　　要：基于动态与静态试验方法对芳香聚酰胺纳滤膜(NF)与反渗透(RO)膜去除饮用水中四环素物质(TC)进行了研究.试验结果表明,NF膜和RO膜对水中TC具有吸附作用;NF膜和RO膜对TC的吸附质量分数分别为35%和40%,且与水中TC的质量浓度成正比,平衡吸附率与初始质量浓度无明显关系;TC在NF膜和RO膜表面的静态吸附特性均遵循Freundlich吸附等温线.通过膜表面的红外光谱图和扫描电子显微镜图发现,NF膜和RO膜对TC的吸附作用较为显著,膜表面存在多种吸附位点,膜孔吸附造成膜的不可逆膜污染.Based on the dynamic and static methods, a study was made of the characteristics of removing tetracycline （TC） from drinking water by aromatic polyamide nanofiltration （NF） membrane ＆ reverse osmosis （RO） membrane. The results show that TCs removal by NF and RO accompanies the process of adsorption, and the adsorption capacities of tetracycline by NF and RO are up to 35% and 40%, respectively. The adsorption capacity of TCs is in proportion to its initial concentration, but there is no significant correlation between the equilibrium adsorption rate and its initial concentration. It elaborates the characteristic of static adsorption of TCs on the membrane surfaces fitted with Freundlich adsorption isotherms model. Besides, the significance of the adsorption of TCs by NF and RO membranes was confirmed by the infrared spectrogram and scanning electron micrograph. There were many adsorption sites on membrane surface for adsorbing TC simultaneously, which could lead to irreversible membrane fouling.

关 键 词：纳滤膜 反渗透 四环素 吸附 膜污染 

分 类 号：TU991.21[建筑科学—市政工程]