Direct lithium extraction from Canadian oil and gas produced water using functional ionic liquids – A preliminary study

IF 3.1 3区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Applied Geochemistry Pub Date : 2024-07-31 DOI:10.1016/j.apgeochem.2024.106126

Xiaomeng Wang , Natasha Numedahl , Chunqing Jiang

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Abstract

In this study, a functional ionic liquid system was successfully applied to extract lithium from the Canadian oil and gas produced water samples without further dilution at ambient conditions. The effects of interference cations, dissolved organics and other factors on the extraction were studied in detail. Chemical precipitation method was applied to reduce the concentrations of divalent ions before the ionic liquid extraction. The extraction efficiency is about 70% on average and can be as high as 90%. It appears that this extraction method can be directly applied to the oilfield brine samples with both high Na/Li and Mg/Li ratios. In addition, it seems that the dissolved organics in the produced water did not impact the extraction efficiency. Efforts shall be made in the future to reduce the cost by replacing the diluent with another type of solvent and further improving the recycle and reuse of the IL systems. In summary, the technology can achieve satisfactory lithium extraction from the Canadian oil and gas produced water.

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利用功能离子液体从加拿大油气开采水中直接提取锂--初步研究

在这项研究中，成功地应用了一种功能离子液体体系，在环境条件下从加拿大油气开采水样品中提取锂，而无需进一步稀释。详细研究了干扰阳离子、溶解有机物和其他因素对萃取的影响。在离子液体萃取之前，采用化学沉淀法降低二价离子的浓度。萃取效率平均约为 70%，最高可达 90%。这种萃取方法似乎可以直接用于 Na/Li 和 Mg/Li 比率都很高的油田盐水样品。此外，采出水中的溶解有机物似乎并不影响萃取效率。今后应努力降低成本，用其他类型的溶剂替代稀释剂，并进一步改进 IL 系统的回收和再利用。总之，该技术可以从加拿大的油气开采水中提取出令人满意的锂。

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来源期刊

Applied Geochemistry 地学-地球化学与地球物理

CiteScore

6.10

自引率

8.80%

发文量

272

审稿时长

65 days

期刊介绍： Applied Geochemistry is an international journal devoted to publication of original research papers, rapid research communications and selected review papers in geochemistry and urban geochemistry which have some practical application to an aspect of human endeavour, such as the preservation of the environment, health, waste disposal and the search for resources. Papers on applications of inorganic, organic and isotope geochemistry and geochemical processes are therefore welcome provided they meet the main criterion. Spatial and temporal monitoring case studies are only of interest to our international readership if they present new ideas of broad application. Topics covered include: (1) Environmental geochemistry (including natural and anthropogenic aspects, and protection and remediation strategies); (2) Hydrogeochemistry (surface and groundwater); (3) Medical (urban) geochemistry; (4) The search for energy resources (in particular unconventional oil and gas or emerging metal resources); (5) Energy exploitation (in particular geothermal energy and CCS); (6) Upgrading of energy and mineral resources where there is a direct geochemical application; and (7) Waste disposal, including nuclear waste disposal.