Direct lithium extraction from raw brine by chemical redox method with LiFePO4/FePO4 materials

被引：31

作者：

Xiong, Jiachun ^{[1
]}

Zhao, Zhongwei ^{[1
,2
]}

Liu, Dongfu ^{[1
]}

He, Lihua ^{[1
,2
]}

机构：

[1] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

[2] Key Lab Hunan Prov Met & Mat Proc Rare Met, Changsha 410083, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2022年 / 290卷

基金：

国家自然科学基金重大项目;

关键词：

Direct lithium extraction; LiFePO; 4; FePO; material; Chemical redox method; Sodium ascorbate; SALT LAKE BRINE; LI EXTRACTION; ION; RECOVERY; ACID; STABILITY; PHOSPHATE; MAGNESIUM; KINETICS;

D O I：

10.1016/j.seppur.2022.120789

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, a novel high-efficient approach of directly extracting lithium from the Da Qaidam artificial raw brine (the main components: Li+ 0.10 g center dot L-1, Na+ 82.34 g center dot L-1) by LiFePO4/FePO4 material through the chemical redox method was proposed. The extraction process demonstrated a fast reaction speed and expected lithium adsorption capacity which reached 9.13 mg center dot g(- 1), and the whole process could be online monitored by measuring the solution's redox potential and pH value. Besides, the adsorption process exhibited excellent ion selectivity while the separation coefficient of lithium towards sodium, potassium, and magnesium reached 8704, 2460, and 6864 respectively. This extraction method features high efficiency, facile and continuous operation, and provides an alternative pathway to directly extract lithium from raw brines.

引用

页数：8

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