▎ 摘　　要

NOVELTY - Preparation method of graphene-based sponge involves performing ultrasonic treatment on the mixture of the graphene oxide dispersion and polyurethane sponge to obtain graphene oxide-loaded polyurethane sponge, heating graphene oxide-loaded polyurethane sponge, temperature of the heat treatment is 140-220 degreesC and the time of the heat treatment is 5-20 hours. USE - Preparation method of graphene-based sponge used for treating sewage (Claimed). ADVANTAGE - Preparation method of the graphene-based sponge is green and nontoxic, environment-friendly and simple to operate, and the obtained graphene-based polyurethane sponge material has excellent oleophylic and hydrophobic properties, is repeatedly utilized for many times after regeneration, and has a good treatment effect on sewage containing oil substances and/or organic solvents. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for treatment method of sewage using graphene-based sponge, sewage contains oily substances and/or organic solvents. DESCRIPTION OF DRAWING(S) - The drawing shows a scanning electron microscope picture of graphene-based polyurethane sponge.