▎ 摘　　要

NOVELTY - Preparing amino-functionalized magnetic oxide graphene comprises (1) dispersing graphene oxide and iron(II,III) oxide nanoparticles in water, and ultrasonically dispersing to obtain mixture; (2) adding the mixture to three-necked flask, heating to 35-60 degrees C, adding 3-aminopropyltriethoxysilane under stirring, reacting at 35-60 degrees C for 0.5-2 hours; adding mixture of glutaraldehyde and polyethyleneimine, reacting at 35-60 degrees C for 10-12 hours, and cooling to room temperature after completion of reaction; and (3) washing the product with water, freezing and drying. USE - The amino-functionalized magnetic oxide graphene useful for removing hexavalent chromium from sewage (claimed). ADVANTAGE - The amino-functionalized magnetic oxide graphene: has hexavalent chromium removal rate of 95-99.9%; can reduces hexavalent chromium in the sewage to below 0.004 mg/l; and is used in field of chromium-containing wastewater treatment. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) amino-functionalized magnetic oxide graphene useful for removing hexavalent chromium from sewage; and (2) regenerating amino-functionalized magnetic oxide graphene comprising preparing 0.1-0.5 mol/l sodium hydroxide solution to obtain regeneration liquid, soaking the amino-functionalized magnetic oxide graphene in regeneration liquid for 1-2 hours to complete regeneration.