Exploration of calcium doped zinc oxide nanoparticles as selective adsorbent for extraction of lead ion

摘要

Ca-doped ZnO nanoparticles-based extraction system has been developed which can be employed simultaneously for the recognition and elimination of Pb(II) ions because of solid interaction among Ca-doped ZnO nanoparticles and Pb(II). The extraction ability of Ca-doped ZnO nanoparticles were deliberated for the removal of lead ions utilizing inductively coupled plasma-optical emission spectrometry. The extraction aptitudes of Ca-doped ZnO were scrutinized for numerous metal ions, comprising Cd(II), Cu(II), Hg(II), La(III), Mn(II), Pb(II), Pd(II), and Y(III). The extraction results revealed that Ca-doped ZnO nanoparticles is selective only for Pb(II). The exclusion ability of Ca-doped ZnO nanoparticles for Pb(II) was 84.66mgg(-1). Furthermore, the extraction profile of Pb(II) on Ca-doped ZnO nanoparticles was matched with the Langmuir adsorption isotherm, which suggest monolayer adsorption of Pb(II) on Ca-doped ZnO nanoparticles. Kinetic study showed that Pb(II) adsorption on Ca-doped ZnO nanoparticles obeyed the pseudo-second-order kinetic model. Calculated thermodynamic parameters also revealed that the adsorption mechanism is a common spontaneous and thermodynamically favorable process. Finally, detection of Pb(II) in environmental water samples was carried out by the anticipated method.