▎ 摘　　要

Despite graphene oxide (GO)'s excellent physical and chemical properties, recent researches suggest its toxicity in biological applications. In this study, three dyes, methylene blue (MB), rhodamine-B (RhB) and methyl orange (MO), are used as coagulants to remove GO from aqueous solution. Results show that MB has the best performance with maximum coagulation capacity up to 2.27 g/g, higher than that of most other coagulants. Electrostatic interaction plays a key role in coagulation, also aided by pi-pi stacking interaction. Besides its great coagulation capacity, MB itself is a pollutant abundant in many types of wastewater, providing a readily accessible reagent, which makes it more suitable for the application.