|Abstract:||The diploma thesis is the result of studying the adsorption of heavy metal ions of Pb2+, Cu2+ and Fe2+ on zeolite. Since this ions are very powerful pollutants of the environment, the question arises as how to protect nature from their harmful effects. One of the possibilities is the adsorption of ions on a strong adsorbent, which in our case is zeolite.
It is essential to get to know the zeolite well, to study its structure and properties, and then to determine, through various chemical analyzes, what is the zeolite's adsorption capacity. The purpose of this thesis was to determine the adsorption properties of zeolit for adsorption of heavy metal ions (Cu2+, Fe2+, Pb2+) in solution, to determine the mass concentrations of metal ions by optical emission spectroscopy (ICP OES), and to study the specificity of the zeolite itself (zeta potential, specific surface area, particle size).
In order to determine the adsorption properties of zeolite, two key parameters, the concentration of the heavy metal ions in solution and the pH of the solution, have been studied. By changing these parameters, the most optimal conditions for adsorption were determined at a concentration of 13 mM and at a pH value of 7. By examining the influence of the concentration of heavy metal ions on the adsorbent, we found that the adsorption efficiency at a higher concentration decreases, with the exception of copper. When changing the pH value, it turned out that pH did not have as much effect on adsorption as the concentration, since we found that the adsorption efficiency decreased only at very low pH (pH = 2.5). We also investigated the interaction of ions on the adsorption efficiency of the zeolite, which showed that the mixture of ions in solution had a good effect on adsorption, since in our case the adsorption efficiency for all three ions was above 99%.|