▎ 摘　　要

NOVELTY - Preparation of terminal amino hyperbranched polymer-grafted graphene oxide magnetic anion adsorbent involves adding terminal amino hyperbranched polymer to an alkaline reagent solution, ultrasonically dispersing, then adding magnetic graphene oxide suspension, grafting at 70-90 degrees C for 12-24 hours, washing grafted product, and freeze-drying under vacuum. The terminal amino hyperbranched polymer is prepared by mixing an amination agent with a methyl acrylate monomer using methanol and/or ethanol as a solvent, under ice bath and gas protection conditions, distilling obtained hyperbranched polymer precursor under reduced pressure, and polycondensing. USE - Preparation of terminal amino hyperbranched polymer-grafted graphene oxide magnetic anion adsorbent used for removing anionic pollutants in wastewater e.g. printing and dyeing wastewater, chromium-containing wastewater and coking wastewater (all claimed). ADVANTAGE - The method enables preparation of terminal amino hyperbranched polymer-grafted graphene oxide magnetic anion adsorbent with high-density amino functional group, and high adsorption capacity for hexavalent chromium ion. DETAILED DESCRIPTION - Preparation of terminal amino hyperbranched polymer-grafted graphene oxide magnetic anion adsorbent involves adding terminal amino hyperbranched polymer to an alkaline reagent solution, ultrasonically dispersing, then adding magnetic graphene oxide suspension, grafting at 70-90 degrees C for 12-24 hours, washing grafted product, and freeze-drying under vacuum. The terminal amino hyperbranched polymer is prepared by mixing an amination agent with a methyl acrylate monomer using methanol and/or ethanol as a solvent, under ice bath and gas protection conditions, distilling obtained hyperbranched polymer precursor under reduced pressure, and polycondensing. The magnetic graphene oxide suspension is prepared by adding graphene oxide to a mixed solution of a ferrous salt and a ferric salt, ultrasonically dispersing, adding obtained dispersion to an alkaline reagent solution under agitation and gas protection conditions, reacting at 70-90 degrees C for 0.5-1 hour, cooling the reaction product to 40-50 degrees C, stirring for 0.5-1 hour, separating black precipitate by a magnet, obtaining magnetic graphene oxide, and ultrasonically dispersing the magnetic graphene oxide in water.