▎ 摘　　要

NOVELTY - Method for preparing nano fiber membrane involves (a) dissolving polyacrylonitrile powder in dimethylformamide solution containing graphene oxide and stirring at room temperature for 30-50 hours to obtain uniform and transparent polyacrylonitrile spinning solution containing graphene oxide, (b) placing the mixed spinning solution in disposable syringe at room temperature, fixing the injector with the needle on supply system of electrostatic spinning equipment and carrying out spinning to obtain graphene oxide or polyacrylonitrile composite nano membrane and (c) adding the composite nano fiber membrane to copper containing wastewater, reacting at room temperature, testing the concentration of the copper ions before and after adsorption and calculating the adsorption quantity. USE - The method is useful for preparing nano fiber membrane for removing heavy metal copper ions in wastewater. ADVANTAGE - The method is simple in operation.