▎ 摘　　要

Due to the outstanding optical, electrical and magnetic properties, rare earth (RE) elements have been exten-sively utilized in many high tech fields. The efficient and sustainable recovery of RE has become an important challenge. In this study, a laser-induced graphene (LIG) film was used as an electrode to study the recovery of La, Nd and Ce by electro-sorption. The conductivity and pH value were affected by the applied current, voltage and RE initial concentration. Under the influence of both electrostatic attraction and electric force, interesting results show that the desorption capacities of La, Nd, and Ce ions reach up to 2510.5 mg g-1, 2349.25 mg g-1 and 2150.75 mg g-1, respectively, which are much higher than the common adsorption materials based on physical adsorption. The RE precipitates obtained by electro-sorption are La(OH)3, Nd(OH)3 and CeO2, respectively. The above investigation shows that a LIG film, used as an electrode, can promote the recovery of La, Nd, and Ce ions from an aqueous solution by an electro-sorption technique. Unlike common RE recovery methods, this study does not involve the environmental problems from hazardous chemicals.