Method for recovering copper, aluminum and iron from waste lithium ion battery leachate

The invention relates to a method for recovering copper, aluminum and iron from a waste lithium ion battery leachate. The method comprises the following steps that manganese powder is added into the waste lithium ion battery leachate to remove copper, and filtering is carried out to obtain a copper-removed solution and copper sponge; nickel carbonate and/or cobaltous hydroxide are/is added into the copper-removed solution for pH value regulating, filtering is carried out after stirring, and an aluminum-removed solution and aluminum slag are obtained; an oxidant is added into the aluminum-removed solution, and stirring is carried out to obtain a ferrous-removed solution; and the iron is removed by adopting a goethite method to obtain a purified solution without the copper, the aluminum andthe iron. According to the method, the manganese powder is used for replacing and removing the copper, the nickel carbonate or the cobaltous hydroxide is used for removing the aluminum without introducing impurities, the cost