▎ 摘　　要

NOVELTY - A graphene oxide film is obtained from improved Hummer-prepared graphene oxide. USE - Graphene oxide film is used in phenol wastewater treatment. ADVANTAGE - The graphene oxide film is manufactured without performing centrifugal separation, and effectively treats phenol wastewater with removal rate of 97% or less. Each graphene oxide film can be reused 5 times without any significant decrease in performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of graphene oxide film, which involves mixing carbon powder, concentrated sulfuric acid and sodium nitrite in ice-water bath, slowly adding potassium permanganate, heating to 35 degrees C, adding distilled water, stirring for 1 hour, continuously stirring, heating at 95 degrees C for 30 minutes, adding distilled water and hydrogen peroxide, and filtering.