▎ 摘　　要

NOVELTY - Surface-modified graphene oxide is prepared by adding graphene oxide to a mixed solution of ethylene glycol and acetone under dispersing ultrasonically, and then adding nano-ferric chloride, sodium acetate and chitosan in aqueous acetic acid with stirring vigorously. The resulting mixed solution is stirred uniformly, placed in a hydrothermal reaction kettle for hydrothermal reaction, cooled to room temperature, and then washed with ethanol and deionized water. USE - Surface-modified graphene oxide for sulfonamide drug in medicinal wastewater (claimed).