摘要
纳滤膜由于其选择性分离机制,在镁锂分离中显示出优异的应用潜力。如今广泛用于盐湖提锂的商业纳滤膜大多带负电荷,其在高镁锂比盐湖提锂中仍有一定的局限性。近年来,学者们基于纳滤膜的分离机理,开发了一系列可用于高镁锂比卤水中锂镁分离的荷正电纳滤膜。综述介绍了纳滤技术的分离机理、性能特征及制备方法,并详细讨论了荷正电纳滤膜在镁锂分离中的设计策略及研究进展。研究表明:通过在膜中引入特定官能团、纳米通道和添加纳米材料,可显著提高膜选择性和渗透性。旨在为高镁锂比盐湖卤水的纳滤膜镁锂分离技术提供新的思路。
Nanofiltration(NF)exhibits the outstanding potential in the separation of magnesium and lithium owing to the selective separation mechanism.The widely used commercial NF membranes are negative charged,which limits separation efficiency in the salt-lake brine with high mass ratio of Mg^(2+)/Li^(+).In recent years,the novel positively charged NF technology has gradually attracted the attention of researchersn.Based on the NF separation mechanism,this review comprehensively introduces the designed strategies,lithium extraction mechanism and research progress including introducing functional groups,specific nanochannels and adding nano materials into the membrane,which can remarkably improve the membrane selectivity and permeability.This review is expected to provide a new insight for the separation of magnesium and lithium from salt-lake brine with high mass ratio of Mg^(2+)/Li^(+).
作者
郑雯佳
张彤
王巧英
张杰
吴志超
Zheng Wenjia;Zhang Tong;Wang Qiaoying;Zhang Jie;Wu Zhichao(School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第S02期1020-1024,共5页
Environmental Engineering
基金
国家科技部重点研发计划项目(2019YFD1100200)
关键词
纳滤
提锂
盐湖卤水
镁锂分离
荷正电纳滤膜
nanofiltration
lithium extraction
salt-lake brine
Mg^(2+)/Li^(+)separation
positively charged NF membrane
作者简介
第一作者:郑雯佳(1999-),女,硕士研究生,主要研究方向为膜分离技术。2130558@tongji.edu.cn;通信作者:王巧英(1986-),女,高级工程师,主要研究方向为污水处理与资源化。qywang@tongji.edu.cn