Separation of magnesium and lithium from brine using a Desal nanofiltration membrane

被引：236

作者：

Sun, Shu-Ying ^{[1
]}

Cai, Li-Juan ^{[1
]}

Nie, Xiao-Yao ^{[1
]}

Song, Xingfu ^{[1
]}

Yu, Jian-Guo ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China

来源：

JOURNAL OF WATER PROCESS ENGINEERING | 2015年 / 7卷

关键词：

Nanofiltration; Brine; Mg2+/Li2+ separation;

D O I：

10.1016/j.jwpe.2015.06.012

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Owing to the high ratio of Mg2+ to Li+ in most of the salt lake brines in China, it is difficult to extract lithium. Therefore, the separation efficiency of a nanofiltration membrane was investigated in this study. Operating conditions such as operating pressure, inflow water temperature, pH, and Mg2+/Li+ ratio were investigated. Relationship between the rejection rates of magnesium and lithium was established. Moreover, the extractions of lithium from salt lake brines were also evaluated. The results indicate that the separation of magnesium and lithium was highly dependent on the Mg2+/Li+ ratio, operating pressure, and pH. When the Mg2+/Li+ ratio was <20, the competitive coefficient was sensitive to the Mg2+/Li+ ratio. The permeate flux of membrane for the East Taijiner brine was higher than that for the West Taijiner brine. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：210 / 217

页数：8

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