Application of new nanostructured sorbent ZnCl2-MCM-41for adsorption of Mercury(II) from aquouse solutions

A new nanostructure adsorbent ZnCl2-MCM-41 was prepared by method of solvent dispersion in toluene andcharacterized using XRD, N2 adsorption-desorption and SEM. The hybrid sorbent was applied for the removal of Hg (II)from aqueous solution under different experimental conditions by varying contact time, initial concentration of Hg (II),pH and solution temperature. It was found that amount of Hg (II) sorption increased with enhancement of Hg (II) initialconcentration, contact time and pH but decreased as the temperature increased. Optimum conditions were obtained 20°C, pH 10 and contact time of 30 min. For experimental data the Langmuir isotherm showed a better fit and maximumadsorption capacity was obtained 204.1 mgg-1 for an initial concentration range 2 to 50 mgL-1.

Keywords:

Nanostructured sorbent , ZnCl2-MCM-41 , Effect of pH , Mercury(II) removal , Langmuir isotherm