Method for selectively extracting and removing fluorine from fluorine-containing aqueous solution based on complexation extraction

The invention discloses a method for selectively extracting and removing fluorine from a fluorine-containing aqueous solution based on complexation extraction. The method comprises the following steps: (1) adding fluorine complexation cations into the fluorine-containing aqueous solution to obtain a solution containing metal-fluorine complexation ions; and (2) mixing the saponified organic phase with a solution containing metal-fluorine complex ions, and carrying out phase splitting to obtain a fluorine-loaded organic phase and a fluorine-removed raffinate. The method provided by the invention can achieve the purpose of deep defluorination. 本发明公开一种基于络合萃取从含氟水溶液选择性萃取除氟的方法，其包括步骤：(1)向含氟水溶液中添加氟络合阳离子获得含金属-氟络合离子的溶液；(2)将皂化有机相与含金属-氟络合离子的溶液混合并分相获得负载氟的有机相和除氟后的萃余液。本发明提出的方法可以达到深度除氟的目的。