▎ 摘　　要

NOVELTY - Preparation of metal ion-adsorbed sewage separation membrane comprises dispersing graphene oxide ultrasonically in deionized water, adding polyphenolic compound, stirring uniformly to react, separating solid and liquid to obtain polyphenol-modified graphene oxide, dispersing in first organic solvent, adding polyvinylidene fluoride and pore-forming agent, stirring sufficiently to obtain casting solution, pouring obtained casting solution on flat plate to obtain film, placing into second solution for curing, taking out cured material, washing, and drying. USE - Method preparing metal ion-adsorbed sewage separation membrane. ADVANTAGE - The separation membrane can be used repeatedly and avoids secondary pollution.