Selective recovery of lithium from aqueous solution with hydrophobic deep eutectic solvent based on quantum chemical calculations and experimental investigation

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2024-11-09 DOI:10.1016/j.psep.2024.11.040

Ke Xue, Hai Liu, Dingchao Fan, Yu Wang, Wenguang Zhu, Zhaoyou Zhu, Jianguang Qi, Yinglong Wang, Peizhe Cui

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引用次数: 0

Abstract

Developing green and efficient extractants for selectively recovering lithium from salt lake brine is beneficial for alleviating the increasingly growing demand for lithium resources. This study developed a novel hydrophobic deep eutectic solvent (HDES) for selective recovery of Li+ from simulated salt lake brine solutions. Under the optimal experimental parameters, the single extraction efficiency of Li+ was 70.18 %, β (Li+/ Na+) and β (Li+/Mg2+) were 22.32 and 947.58, respectively. Cycle experiments verified the high stability and good cycle performance of HDES. The conditions affecting the extraction efficiency of Li⁺ were optimized through experiments, and the high stability and good cyclic performance of HDES were verified. The extraction ability and mechanism of HDES for different metal ions were studied based on FTIR spectra combined with density functional theory. The calculation results showed that the order of extraction capacity of HDES for metal ions was: Li+>Na+>Mg2+. This calculation results were identical to the experimental results. This research will help develop HDES for the selective recovery of lithium from aqueous solutions containing high concentrations of Mg2+, helping to address the urgent global demand for lithium resources.

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基于量子化学计算和实验研究的疏水性深共晶溶剂对水溶液中锂的选择性回收

开发从盐湖卤水中选择性回收锂的绿色高效萃取剂有利于缓解日益增长的锂资源需求。本研究开发了一种新型疏水性深共晶溶剂（HDES），用于从模拟盐湖卤水溶液中选择性回收 Li+。在最佳实验参数下，Li+的单次萃取效率为70.18%，β（Li+/ Na+）和β（Li+/Mg2+）分别为22.32和947.58。循环实验验证了 HDES 的高稳定性和良好的循环性能。通过实验优化了影响 Li⁺ 提取效率的条件，验证了 HDES 的高稳定性和良好的循环性能。基于傅立叶变换红外光谱和密度泛函理论，研究了 HDES 对不同金属离子的萃取能力和机理。计算结果表明，HDES 对金属离子的萃取能力顺序为Li+>Na+>Mg2+。这一计算结果与实验结果完全一致。这项研究将有助于开发从含高浓度 Mg2+ 的水溶液中选择性回收锂的 HDES，从而帮助解决全球对锂资源的迫切需求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.