Tetraethyl Orthosilicate Coated Hydroxyapatite Powders for Lead Ions Removal from Aqueous Solutions

Rodica V. Ghita (1) , Simona Liliana Iconaru (1, 2) , Cristina L. Popa (1, 3) , Adrian Costescu (4) , Philippe Le Coustumer (5) , Mikael Motelica-Heino (2) , Carmen Steluta Ciobanu (1)

1 National Institute of Materials Physics
2 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
3 Faculty of Physics
4 Hyperion
5 Ghymac - Géosciences hydrosciences matériaux constructions

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 transforminfrared spectroscopy (FTIR), and transmission electron microscopy (TEM). Removal experiments of Pb2+ ionswere 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.

Domains: Continental interfaces, environment; Global Changes

Rodica V. Ghita, Simona Liliana Iconaru, Cristina L. Popa, Adrian Costescu, Philippe Le Coustumer, et al.. Tetraethyl Orthosilicate Coated Hydroxyapatite Powders for Lead Ions Removal from Aqueous Solutions. Journal of Nanomaterials, 2014, ID 176426, 7 p. ⟨10.1155/2014/176426⟩. ⟨insu-01052622⟩