膜科学与技术

层层自组装“三明治”结构纳滤膜实现高效镁锂分离

作者：何荣荣，董晨俊，白冰洋，孙楠，宋健峰，张春耀，何涛

单位： 1中国科学院上海高等研究院,膜材料与分离技术实验室,中国上海 201210 2中国科学院大学,中国北京 100049 3上海科技大学,中国上海 201210

关键词：层层自组装; 中空纤维纳滤膜; 镁锂分离.

出版年,卷(期):页码： 2021,41(6):269-270

摘要：

本文报道了中国科学院上海高等研究院近期在层层自组装(LBL)纳滤膜材料设计和组件制备的最新进展. 研究提出了“三明治”新型纳滤膜结构，并在4寸组件基础上实现高效镁锂分离.在处理浓度为2000 mg/L,Mg2+:Li+=20:1(质量比)的模拟盐湖卤水时, 结果表明该膜对Mg2+的截留率为99.7%,镁锂分离系数为176. 该结果是目前文献报道可工程化的最好的之一。

This communication reported a new design of layer-by-layer (LBL) self-assembled “Sandwich” structured nanofiltration membrane and 4-inch hollow fiber module for Mg2+/Li+ separation. When testing a synthetic salt lake brine of 2000 mg/L at Mg2+: Li+=20:1, the rejection of the membrane module for Mg2+ was 99.7%, and the separation factor SMg2+,Li+ was 176. These values set new record for nanofiltration membrane performance in Mg2+/Li+ separation with engineering potential.

何荣荣 (1994-),女,河南濮阳人,博士研究生,研究方向为层层自组装纳滤膜用于镁锂分离的研究.

参考文献：

[1] Q. Wu, X. Liu, M. Zheng, Z. Nie, J. Yu, Present situation, existing problems and countermeasures of development of salt lake lithium resources in China, Modern Chemical Industry, 37 (2017) 1-5.
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[5] Membrane Desalination 2021 5th Internation Conference on Desalination using Membrane

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