▎ 摘　　要

NOVELTY - Adsorption film comprises film solution. The raw material of the film solution comprises graphene and/or modified graphene, collodion solution and dispersant. USE - Used as adsorption film. ADVANTAGE - The adsorption film: utilizes graphene-modified collodion to prepare adsorption film, which can be used for container walls to adsorb scale crystals; and can prevent the measurement error caused by the growth of scale crystals on the wall of the Erlenmeyer flask when the commonly used static method is used to measure the amount of fouling in sewage. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the adsorption film, comprising (1) adding graphene and/or modified graphene in collodion solution, and stirring, (2) adding dispersant to the solution of the step (1), and continuously stirring until the solution is uniformly stirred to obtain mixed solution, (3) subjecting mixed solution to ultrasonic reaction in ultrasonic device, (4) sealing and allowing to stand the mixed solution after ultrasonic reaction, and collecting the upper layer solution to obtain the collodion solution after graphene modification, which is the film solution, and (5) drying after coating the film solution to form adsorption film; and use method of the adsorption film, comprising coating adsorption film on the wall of the container to be filled with sewage, and measuring the fouling amount of sewage.