▎ 摘　　要

Municipal, industrial, and agricultural wastewaters contain high concentrations of nitrogen in the form of ammonia and ammonium ions. This nitrogen has a range of polluting effects and must be removed before discharge. Multiple methods are currently under investigation for the removal or capture of total ammonia nitrogen (TAN). TAN in aqueous media shows unique behavior making it necessary to study its interactions with potential absorbents in detail. In this study, sodium functionalized graphene oxide (GO-Na) was used for TAN removal from aqueous media by ion exchange. Batch adsorption experiments were performed to investigate the adsorption capacity of GO-Na and. The mechanism of adsorption was investigated using multiple models including Elovich and intra-particle diffusion models. The adsorption kinetics followed the pseudo-second-order model. Experimental data was well described by a Langmuir isotherm model with a maximum adsorption capacity of 32 mg/g. The adsorption energies and thermodynamic parameters indicated weak interactions were dominant with an overall exothermic and spontaneous process. The weak interactions resulted from the ion-exchange of sodium cation on the surface of graphene oxide with ammonium cations in the liquid phase, which also results in the easy regeneration of the adsorbent with NaCl which is a non-toxic, environmentally friendly and inexpensive salt in nature.