Preparation of nanoparticles from CaO and use it for removal of chromium (II), and mercury (II) from aqueous solutions

Abstract

Abstract Calcium oxide (CaO) nanoparticles were prepared by the sol-gel strategy from CaCl2 and calcinated the gathered powder at various temperatures (400, 500 and 600°C). Additionally, the basic qualities for the readied sorbent were researched by methods for powder X-beam diffraction examination (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) while the textural properties were resolved from low temperature adsorption of N2 at - 196°C. Great outcomes were acquired under the proper conditions. The capacity of CaO nanoparticles for evacuation of some overwhelming metal particles as chromium (II) and mercury (II) from aqueous solutions through adsorption has been researched. Every one of the analyses was completed by batch method. The impact of pH (2, 5, 7, 8 and 10), stirring time, temperature and the presence of different foreign ions has been researched. The expulsion rate going to 100 % of various metal particles at pH7, stirring time 30 min, room temperature (≍ 25°C) was accomplished and adsorbent dose 30 mg.