Abstract
The paper presents the kinetics of Cd (II) ions adsorption as well as adsorption of Cd (II) ions as a function of pH on the hydrothermally modified zirconium phosphate samples. Zirconium phosphate was synthesized using zirconium oxy-chloride and ammonium phosphate. The hydrothermal modification was carried out using dried xerogel of zirconium phosphate at temperature 150, 200 and 250 °C. The hydrothermal modification increases the specific surface area, the content of mesoporous as well as promotes creation of more acidic sites in the surface. Cadmium ions adsorption studies on these adsorbents showed practically complete removal of Cd (II) from aqueous solutions with an initial concentration of ≤0.0001 mol dm−3 and a pH> 3 within a few minutes.
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