Removal of Zinc Ions Using Hydroxyapatite and Study of Ultrasound Behavior of Aqueous Media

Simona Liliana Iconaru (1) , Mikael Motelica-Heino (2, 3) , Régis Guégan (4) , Mihai Valentin Predoi (5) , Alina Mihaela Prodan (6) , Daniela Predoi

1 National Institute of Physics of Materials
2 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
3 Biogéosystèmes Continentaux - UMR7327
4 Waseda University [Tokyo, Japan]
5 UPB - University Politehnica of Bucharest [Romania]
6 UMPCD - University of Medicine and Pharmacy “Carol Davila” Bucharest

The present study demonstrates the effectiveness of hydroxyapatite nanopowders in the adsorption of zinc in aqueous solutions. The synthesized hydroxyapatites before (HAp) and after the adsorption of zinc (at a concentration of 50 mg/L) in solution (HApD) were characterized using X-ray diffraction (XRD), and scanning and transmission electron microscopy (SEM and TEM, respectively). The effectiveness of hydroxyapatite nanopowders in the adsorption of zinc in aqueous solutions was stressed out through ultrasonic measurements. Both Langmuir and Freundlich models properly fitted on a wide range of concentration the equilibrium adsorption isotherms, allowing us to precisely quantify the affinity of zinc to hydroxyapatite nanopowders and to probe the efficacy of hydroxyapatite in removal of zinc ions from aqueous solutions in ultrasonic conditions.

Keywords: zinc; adsorption; hydroxyapatite; ultrasonic measurements; water depollution

Domains: Material chemistry

Simona Liliana Iconaru, Mikael Motelica-Heino, Régis Guégan, Mihai Valentin Predoi, Alina Mihaela Prodan, et al.. Removal of Zinc Ions Using Hydroxyapatite and Study of Ultrasound Behavior of Aqueous Media. Materials, 2018, 11 (8), pp.1350. ⟨10.3390/ma11081350⟩. ⟨insu-01856087⟩