چكيده به لاتين
In this project, porous silicon (PSi) powder was prepared by chemical etching of silicon powder in an etchant solution of HF: HNO3: H2O (4:3:6 v/v). The technique employed in this work is particularly attractive, because of its simplicity and the presence of readily available oxidizing reagents; namely nitric acid (HNO3) and water (H2O), as well as hydrogen fluoride (HF). Because of the low efficiency of PSi surface itself in adsorption, it should be functionalized before using for that purpose. Adsorption has been used as a suitable method for phosphate removal since long time ago.
In this study, iron and zirconium nanoparticles were deposited separately on the surface of porous silicon and synthesized composites were used to remove phosphate ions from aqueous solutions. Phosphate in aqueous solutions was determined by the stannous chloride method using UV-Vis, at a wavelength of 690 nm.
The effect of various parameters such as contact time, stirring speed, pH, initial phosphate concentration, and temperature and ion adsorption competitivity were investigated.
The samples were characterized by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) method.
It can be concluded that the synthesized adsorbents in this study proved to be interesting adsorbents for the removal of phosphate from aqueous solutions.
