Lithium extraction from salt lake brines with high magnesium/lithium ratio: a review

ENVIRONMENTAL CHEMISTRY LETTERS(2023)

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摘要
The demand for lithium is growing rapidly with the increase in electric vehicles, batteries and electronic equipments. Lithium can be extracted from brines, yet the separation of lithium ions Li + from magnesium ions Mg 2+ is challenging at high Mg/Li ratios. Here, we review methods to extract lithium from brines, such as extraction, adsorption, nanofiltration, selective electrodialysis and electrochemical intercalation/de-intercalation, with focus on the selective separation of lithium at high Mg/Li ratios. Extraction can be done with organic solvents and ionic liquids. Adsorption is performed with aluminum-, manganese- and titanate-based adsorbents.
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关键词
Sustainable development,Salt lake brines,Extraction and separation,Lithium resources
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