Removing Metal Ions of Cobalt (II) from Aqueous Solutions By CaO Nanoparticle

Abstract

Abstract Colloidal particles of “Calcium0oxide” CaO” nanoparticles0were prepared by the (sol-, gel)method)from(CaCl2). The study focused on the removal of metal Co(II) from aqueous solutions by adsorption process. Powder CaO was calcination at temperature 500oC. The 9 structural (characteristics) of the synthesized sorbent-were investigated, by-means of (X-ray) analysis “XRD” FTIR spectroscopy, “transmission electron microscope” (TEM), “scanning electron microscope” (SEM) and surface area. The effect of various parameters like as the effect of pH (2, 5, 7, 8 and 10), initial concentration for metal ion Co(II) (50-350 mg/L) and temperature difference (5, 25, 45 and 65) oC. Almost complete removal (99 %) of metal ion Co(II) was obtained within 30 min at an optimum adsorbent dose of 0.05 mg for initial Co(II) concentration of 50 mg/L at pH = 7, room temperature (≍ 25oC) were achieved.