Removal of Zn(II) and Pb(II) from aqueous solution on CaF2 nanoparticles

This paper explores the adsorptive properties of CaF2 nanoparticles for the removal of Pb(II) and Zn(II) from aqueous solutions and their selective recovery. CaF2 nanoparticles were synthesized by a facile one-step reaction and characterized by N2 physisorption at 77 K, XRD and TEM. Adsorption data show good fit with Elovich and Langmuir models for the Zn(II) and Pb(II) adsorption, respectively. Kinetic data are well described by the pseudo-second-order model. Our results show that Zn(II) and Pb(II) could be totally and selectively desorbed with HCl. CaF2 could be a promising adsorbent for the removal of Pb(II) and Zn(II) from polluted aqueous media.

Keywords:

removal , CaF2 , characterization , zinc , lead , wastewater