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Abstract
This review identifies the most significant knowledge acquired on the recovery of indium from aqueous solutions using solvent extraction. Research on the efficient and selective recovery of this valuable element from aqueous solutions is particularly emphasized, as this information is useful for potential hydrometallurgical applications. A good comprehension of the extraction reactions involved can be important for further development; therefore, the data provided are systematically classified according to the different types of chemical reactions that occur during metal ion extraction. Some complexation studies may also be mentioned, particularly if they contribute additional information to a promising solvent extraction system.