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  4. 胶束增强陶瓷膜处理镧离子废水的研究

膜科学与技术 , 2015, 35(2): 57-63. doi: 10.16159/j.cnki.issn1007-8924.2015.02.011

胶束增强陶瓷膜处理镧离子废水的研究

徐方松 1, , 邢卫红 2, , 张峰 3, , 范益群 4,

1.南京工业大学膜科学技术研究所国家特种分离膜工程技术研究中心,南京,210009

2.南京工业大学膜科学技术研究所国家特种分离膜工程技术研究中心,南京,210009

3.南京工业大学膜科学技术研究所国家特种分离膜工程技术研究中心,南京,210009

4.南京工业大学膜科学技术研究所国家特种分离膜工程技术研究中心,南京,210009

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

关键词： 陶瓷膜 , 胶束增强 , 十二烷基硫酸钠 , 镧离子 , 废水

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

Keywords： ceramic membrane , MEUF , SDS , La3+ , wastewater

将十二烷基硫酸钠(SDS)与孔径5nm的陶瓷膜结合,探索胶束增强陶瓷膜法处理镧离子废水的可行性.考察了SDS摩尔浓度、跨膜压差(TMP)、溶液pH值等因素对陶瓷膜过滤性能的影响.结果表明,随着SDS摩尔浓度的增大,陶瓷膜对La3+的截留率从70％增大到99.9％;当SDS摩尔浓度大于临界胶束浓度(CMC)后,膜对La3+的截留率略有降低,大约维持在95％～97％左右;膜通量则随SDS摩尔浓度增大先减小后增大,最后趋于65 L/(m2·h).随着TMP提高,膜通量基本呈线性关系增大,膜对SDS和La3+的截留率略增大.随着溶液pH的升高,渗透通量略有下降,膜对La3+和SDS的截留率均显著增加.采用体积浓度为0.5％的稀硝酸清洗污染的陶瓷膜,膜的纯水通量可恢复到95％以上,重复性好.

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