▎ 摘　　要

NOVELTY - Preparing polyacrylonitrile/ethylene vinyl alcohol composite fiber membrane involves adding polyacrylonitrile powder (PAN), thioacetamide and graphene oxide to solvent I, sonicating and stirring for 30-60 minutes to prepare spinning solution I, where the ratio of polyacrylonitrile powder, thioacetamide and graphene oxide is 1:0.8-1.3:0.5-0.9, adding polyvinyl-vinyl alcohol (EVOH), chitosan and humic acid to solvent II, stirring ultrasonically for 40-70 minutes to obtain spinning solution II, where the ratio of polyvinyl-vinyl alcohol (EVOH), chitosan sugar and humic acid is 1:0.45-0.86:0.36-0.69, placing the spinning solution I and the spinning solution II into the electrospinning injection pump respectively, two injection pumps start spinning relative to each other to obtain product. USE - Method for preparing polyacrylonitrile/ethylene vinyl alcohol composite fiber membrane used in the treatment of lead ion wastewater. ADVANTAGE - The method is suitable for heavy metal filtering treatment in water and has large specific surface area, high porosity, large adsorption amount of lead ion in the water.