Characterization and properties of manganese oxide coated zeolite as adsorbent for removal of Copper(II) and Lead(II) ions from solution

A new adsorbent, manganese oxide coated zeolite (MOCZ), was characterized and employed for the removal of Cu(II) and Pb(II) from aqueous solution using batch equilibrium experiments. Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and BET analyses were used to observe the surface properties of the coated layer. Binding of Cu(II) and Pb(II) ions by MOCZ was clearly pH-dependent, and the loading capacities increased with increasing pH. Adsorption behavior of Cu(II) and Pb(II) ions can be approximately described with the Langmuir and Redlich-Peterson equation. The thermodynamic parameters (Delta G degrees, Delta H degrees, and Delta S degrees) were also determined, and the adsorption process is more favored at higher temperatures.