Natural eutectic ionic liquid as well as preparation method and application thereof

The invention relates to the technical field of preparation of ionic liquid, and particularly discloses natural eutectic ionic liquid as well as a preparation method and application thereof. The natural eutectic ionic liquid is prepared from glycollic acid and proline. The natural eutectic ionic liquid provided by the invention can be used for extracting heavy metal lead ions in soil, and has extremely high extraction rate. The ionic liquid also has the advantages of wide raw material source, naturalness, low price, simple preparation method, high thermal stability, lower eutectic point and wide application range, and has extremely high popularization and application values. 本发明涉及离子液体的制备技术领域，具体公开一种天然低共熔离子液体及其制备方法和应用。所述天然低共熔离子液体由乙醇酸和脯氨酸制备而成。本发明提供的天然低共熔离子液体可用于萃取土壤重金属铅离子，并具有极高的萃取率。且该离子液体还具有原料来源广泛、天然、价格低廉、制备方法简单、热稳定性高、较低的低共熔点和适用范围广的优势，具有极高的推广应用价值。