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Removal of La(III) ions from aqueous solution with micellar-enhanced ultrafiltration by ceramic membrane

Authors： XU Fangsong, XING Weihong*, ZHANG Feng, FAN Yiqun

Units： National Engineering Research Center for Special Separation Membrane, Membrane Science and Technology Research Center, Nanjing University of Technology, Nanjing 210009, Jiangsu, China

KeyWords： Ceramic membrane; MEUF; SDS; La3+; wastewater

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2015,35(2):57-63

Abstract：

In this study, the feasibility of the micellar-enhanced ultrafiltration (MEUF) process for removing La3+ using the anionic surfactant sodium dodecyl sulfate (SDS) was evaluated. The effects of different parameters on the separation performance of 5 nm ceramic membrane were investigated including the concentration of SDS, transmembrane pressure (TMP) and solution pH. It was found that when the SDS concentration exceeded the critical micelle concentration (CMC), the rejection of La3+ was among 95%-97% with little change. The flux increased firstly and then decreased with the increase of SDS concentration and finally tended to 65 L·m-2·h-1·bar-1. The permeate flux increased linearly and the rejection of La3+ and SDS had a slight increase with the increasing of TMP. With increasing solution pH, the permeate flux decreased slightly, but the rejections of La3+ and SDS increased significantly. Finally, the ceramic membrane was washed with 0.5% (vol%) HNO3 and the pure water flux could be recovered above 95% effectively, and the flux of the ceramic membrane had a good reproducibility.

Funds：

国家自然科学基金项目(21125629,21306079), 863重大项目课题(2012AA03A606), 江苏省高校自然科学基金(13KJB530005), 江苏省工业支撑项目（BE2011185）。

AuthorIntro：

徐方松，(1989- )，男，山东武城人，硕士生，研究方向为膜法水处理技术，E-mail：haizhizi123xu @163.com。

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