The commercial Fe-Si-B metallic glass (Fe-Si-B^MG) powder and the widely used powder of zero valent iron (ZVI), namely Fe⁰, were used to eliminate the Ni(II) from aqueous solution. Kinetic analysis results indicate that the removal efficiency of Fe-Si-B^MG powder in removing Ni(II) is about 38 times faster than that of the Fe⁰ powder. Morphology observation shows that the product layers on the surface of Fe-Si-B^MG powder are composed of homogeneous and loose whiskers, which peel off more easily from the surface during the agitation process, compared with those of Fe⁰ powder. Chemical composition analysis about the surface of Fe-Si-B^MG powders before and after reaction shows that Fe-Si-B^MG powder can eliminate the Ni(II) through surface adsorption, reduction, and coprecipitation mechanisms; while Fe⁰ powder removes the Ni(II) in solution mainly through surface adsorption and coprecipitation mechanisms.