Removal of Zinc Ions Using Hydroxyapatite and Study of Ultrasound Behavior of Aqueous Media
by
Simona Liliana Iconaru 1, Mikael Motelica-Heino 2, Régis Guegan 3, Mihai Valentin Predoi 4, Alina Mihaela Prodan 5,6 and Daniela Predoi 1,*
Simona Liliana Iconaru 1, Mikael Motelica-Heino 2, Régis Guegan 3, Mihai Valentin Predoi 4, Alina Mihaela Prodan 5,6 and Daniela Predoi 1,*
1
National Institute of Materials Physics, Atomistilor Street, No. 405A, P.O. Box MG 07, Magurele 077125, Romania
2
Institut des Sciences de la Terre d’Orléans (ISTO), UMR 7327 CNRS Université d’Orléans, 1A rue de la Férollerie, 45071 Orléans CEDEX 2, France
3
Faculty of Science and Engineering, Global Center for Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
4
Department of Mechanics, University Politehnica of Bucharest, BN 002, 313 Splaiul Independentei, Sector 6, Bucharest 060042, Romania
5
Emergency Hospital Floreasca Bucharest, 8 Calea Floreasca, Sector 1, Bucharest 014461, Romania
6
Carol Davila University of Medicine and Pharmacy, 8 Eroii Sanitari, Sector 5, Bucharest 050474, Romania
*
Author to whom correspondence should be addressed.
Materials 2018, 11(8), 1350; https://doi.org/10.3390/ma11081350
Received: 6 June 2018 / Revised: 25 July 2018 / Accepted: 1 August 2018 / Published: 3 August 2018
(This article belongs to the Special Issue Advanced Functional Nanomaterials and Their Applications)
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.
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Keywords:
hydroxyapatite; ultrasonic measurements; water depollution; zinc; adsorption
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MDPI and ACS Style
Iconaru, S.L.; Motelica-Heino, M.; Guegan, R.; Predoi, M.V.; Prodan, A.M.; Predoi, D. Removal of Zinc Ions Using Hydroxyapatite and Study of Ultrasound Behavior of Aqueous Media. Materials 2018, 11, 1350.
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