卤水
纳滤
萃取(化学)
材料科学
膜
化学工程
锂(药物)
分离过程
盐(化学)
化学
色谱法
医学
生物化学
有机化学
物理化学
工程类
内分泌学
作者
Jian Jin,Xian Wei,Xue Cao,Meiwen Peng,Min Wang,Lin Jiang,Jian Jin
标识
DOI:10.1038/s41467-023-44625-w
摘要
Abstract The demand for lithium extraction from salt-lake brines is increasing to address the lithium supply shortage. Nanofiltration separation technology with high Mg 2+ /Li + separation efficiency has shown great potential for lithium extraction. However, it usually requires diluting the brine with a large quantity of freshwater and only yields Li + -enriched solution. Inspired by the process of selective ion uptake and salt secretion in mangroves, we report here the direct extraction of lithium from salt-lake brines by utilizing the synergistic effect of ion separation membrane and solar-driven evaporator. The ion separation membrane-based solar evaporator is a multilayer structure consisting of an upper photothermal layer to evaporate water, a hydrophilic porous membrane in the middle to generate capillary pressure as the driving force for water transport, and an ultrathin ion separation membrane at the bottom to allow Li + to pass through and block other multivalent ions. This process exhibits excellent lithium extraction capability. When treating artificial salt-lake brine with salt concentration as high as 348.4 g L −1 , the Mg 2+ /Li + ratio is reduced by 66 times (from 19.8 to 0.3). This research combines ion separation with solar-driven evaporation to directly obtain LiCl powder, providing an efficient and sustainable approach for lithium extraction.
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