Abstract
The goal of this study was to synthetize and characterize a porous material based on tetraethyl orthosilicate (TEOS) coated hydroxyapatite (HApTh) after removal experiments of Pb2+ions from aqueous solutions. In order to study the morphology and composition, the samples obtained after removal experiments of Pb2+ions from aqueous solution with the initial Pb2+ion concentrations of the aqueous solutions were 0.1 g·L−1(HApTh-50) and 0.9 g·L−1(HApTh-450) have been investigated by scanning electron microscopy (SEM) equipped with an energy dispersive X-ray spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). Removal experiments of Pb2+ions were carried out in aqueous solutions with controlled concentration of Pb2+. After the removal experiment of Pb2+ions from solutions, porous hydroxyapatite nanoparticles were transformed into HApTh-50 and HApTh-450 due to the adsorption of Pb2+ions followed by a cation exchange reaction. The obtained results show that the porous HApTh nanopowders could be used for Pb2+ions removal from aqueous solutions.
Highlights
One of the major problems encountered in the public health area worldwide is the poisoning with various heavy metals
The main goal of this study was to synthesize a new porous nanocomposite material based on tetraethyl orthosilicate (TEOS) coated hydroxyapatite
In this study we investigated the ability of these new materials to remove Pb2+ ions from aqueous solutions with different concentration and pH values
Summary
One of the major problems encountered in the public health area worldwide is the poisoning with various heavy metals. Researchers around the world have turned their attention to finding new effective and cost-efficient methods for depollution, considering the fact that heavy metals are nonbiodegradable, having the tendency to accumulate in living bodies, leading to disorders of different functions and to serious diseases [1, 2]. The effects of chronic lead exposure to various functions of the human body have already been reported [3, 6] In this context, many researchers have focused their attention to developing different methods for dangerous heavy metals removal from wastewaters. Among the methods already used, chemical precipitation, membrane filtration, ion-exchange, and adsorption could be mentioned [7,8,9] Of all these methods, the most preferred one is the adsorption of heavy metals ions from aqueous solution using cost-efficient materials [7,8,9].
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