Many hydro-metallurgical methods are developed to recover vanadium, while the ammonium salts precipitation possesses the final step and it has threatened to the environment. The key point is to find a new compound to replace ammonium salts without reducing the vanadium recovery efficiency. Some compounds with -NH2 function group have attracted our attention as they have similar function group with ammonium salts. In this paper, the adsorption of vanadium with melamine is conducted. The results...