Hydrometallurgical processing of strategic elements such as copper and cobalt is a subject of great relevance because of the economical and environmental issues involved. In this thesis, the interaction of superparamagnetic nanoparticles functionalized with ethylenediamine groups with transition metal ions, such as copper(II) and cobalt(II), has been investigated from the physico-chemical point of view, focusing on the adsorption kinetics and complexation equilibrium involved, aiming the understanding of magnetic nanohydrometallurgy applied to those systems. Also investigated was the influence of possible variables, such as the counter ions in solution and the adsorption selectivity observed in the comparison of different metal ions. Special emphasis was applied to the construction of adsorption isotherms using analytical methods (EDX) and zeta potentials measured in situ in aqueous solution. The proposed models in both cases, provided a critical view of the methodologies, showing the contrasts and the special role of the solvodynamic effects associated with the zeta potentials, including the formation of ion pairs at the nanoparticles slipping plane. The possible application of the systems in the development of magnetic affinity chromatography has also been demonstrated in the selective adsorption of mioglobin by the superparamagnetic nanoparticles containing copper ions. The Langmuir isotherm revealed a reversible process, in which the adsorption and desorption steps can be controlled by the pH of the reactional media.