▎ 摘　　要

NOVELTY - Preparing graphene oxide aerogel having high recyclability involves adding graphene oxide to deionized water, and sonicating for 30-60 minutes to obtain a concentration 2-5 wt.% graphene oxide dispersion, adding lignocellulose to the graphene oxide dispersion, stirring for 6-8 hours to uniformly obtain solution A. The magnetic iron oxide (Fe3O4) nanoparticles is ultrasonically dispersing in ethanol to obtain solution B, and the concentration of magnetic Fe3O4 nanoparticles is 1-3 wt.%, mixing solution A and solution B, adding polyethyleneimine and genipin, and stirring at 40-50 degrees C for 10-16 hours. The reaction is finished at -20 degrees C and freeze-dried for 15-20 hours to obtain a graphene oxide aerogel. USE - Method for preparing graphene oxide aerogel having high recyclability used for treating water (claimed). ADVANTAGE - The method enables to prepare graphene oxide aerogel having high recyclability has good mechanical property and stability, has magnetic resonance and can fast separating and recycling, has voids secondary pollution to water bodies, and can be reused in the water treatment field.