Method for removing heavy metals in water by using capacitive deionization technology

The invention relates to a method for removing heavy metals in water by using a capacitive deionization technology, and relates to the technical field of removal of heavy metal ions in industrial wastewater. The nZVI and the Fe3O4 are compounded and then loaded on the ACF to prepare a composite material and characterize the composite material, the nZVI-Fe3O4/ACF composite electrode is prepared through an adhesion method, the nZVI-Fe3O4/ACF composite electrode is used for a capacitive deionization (CDI) technology, and heavy metal ions in water can be efficiently removed mainly under the action of an external power supply by utilizing the adsorption of the ACF, the reduction performance of the nZVI and the synergistic effect of the Fe3O4 on the adsorption of the heavy metal ions. The method has good removal performance in a heavy metal ion coexistence system existing in the form of zwitterions, and a certain theoretical basis is laid for removal of heavy metal ions existing in the form of zwitterions in actual