In the present work we evaluated the use of dolomite as an alternative for the adsorption of lead and copper ions from their aqueous solutions. The possible interferences between them and the selectivity of the process were studied working with mixtures of these two ions in adsorption processes. From the analysis of the results it can be inferred that the adsorption of lead is not affected by the presence of copper, since no changes in its adsorption capacity are observed as the concentration of the other ion changes. Copper adsorption is not affected by the presence of lead up to a copper level of 130 mg / L. For higher concentrations of copper, the antagonistic competition of Pb is manifested. From the kinetic studies performed at an equimolar concentration of Pb (400 mg / L) and Cu (130 mg / L), it was observed that the presence of copper increases the time required to reach the equilibrium of lead adsorption, but its adsorption capacity is unchanged. For the adsorption of copper the equilibrium time was not modified by the presence of lead.Keywords: Competitive adsorption, binary mixtures, copper, lead.