The experiment was carried out to study the ability of Cu and Zn adsorption on natural Zeolite using six concentration of Cu and Zn (50, 100, 150, 200, 250, 300) mg.L-1 and two different diameters of Zeolite particles (0.5mm-1mm). The research aimed to define the ability of Freundlich and Langmuir isotherms equations. specifically coefficient R2 was used to determine the suitability of these isotherms.