Adsorption and removal of tetracycline antibiotics from aqueous solution by graphene oxide

► GO was used as an adsorbent for tetracycline removal from the aqueous solution. ► Tetracyclines strongly deposited on GO via π-π interaction and cation-π bonding. ► The adsorption isotherms fit Langmuir model and Freundlich model well. ► The adsorption kinetics and effect of pH were studied in detail.