Heavy metal pollution has become one of the most serious environmental problems today. Treatment of heavy metals is of particular concern because of their permanence and persistence in the environment. In recent years, adsorption has been studied extensively as a method for the removal of copper (II) ion in aqueous solutions. The objective of this work was to analyze the adsorption kinetics of the Cu (II) ion with different materials, determining the solid that adsorbs the most to the element. For this, ten scientific articles by renowned authors were reviewed who published as part of their results the maximum adsorption capacities (q_max) of their evaluated materials, based on the adsorption isotherms that were better correlated to the Langmuir and Freundlich equations. Afterwards, the q_max of the consulted studies were compared through a statistical graph. Finally, it was concluded that the highest maximum adsorption capacity of Cu (II) was 980.90 mg / g, used in chitosan beads with waste active sludge char.