▎ 摘　　要

NOVELTY - Preparation of magnetic nano-graphene oxide involves dispersing graphite raw material containing graphite powder, hydrogen peroxide and auxiliary grinding agent in the ratio of 1:1:1 in water and separating to obtain graphene oxide through combination of mechanical action and oxidation reaction and purifying obtained graphene oxide, and modifying graphene oxide and preparing magnetic nano-graphene oxide, dispersing purified graphene oxide in water to obtain graphene oxide solution, dissolving 16 %(W/V) ferrous sulfate in the graphene oxide solution and adding 0.003 g surfactant simultaneously, leaving still for 2 hours in air, dripping 2 mol/L sodium hydroxide under strong stirring condition to pH of more than 9 to obtain a black suspension of the reaction product, filtering the reaction product, washing with distilled water and drying. USE - Preparation of magnetic nano-graphene oxide. ADVANTAGE - The magnetic nano-graphene oxide has good toughness, short curing time, strong adhesive force, simple preparation method, and high mechanical strength. The ion-exchange resin has higher surface charge concentration and stronger ability to adsorb ions than graphene oxide, so as to realize adsorption and removal of heteroions with high removal amount.