UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 17:43

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Polymer Physics


Title:
Novel hydroxyapatite coated with polyvinyl alcohol composites (HAp-APV) for zinc removal from water


Authors:
Daniela PREDOI(1), Simona Liliana ICONARU(1), Mikael MOTELICA(2), Regis GUEGAN(3), Monica Luminita BADEA(4), Gabriel PREDOI(5), Stefania Mariana RAITA(5), Ana Maria ENE(1), Liliana GHEGOIU(1), Florin FURNARIS(5)


Affiliation:
1) National Institute of Materials Physics, 405A Atomistilor Street, Magurele, Romania

2) 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) University of Agronomic Sciences and Veterinary Medicine, 59 Mărăşti Blvd., 011464, Bucharest, Romania

5) Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, Sector 5, 050097 Bucharest, Romania


E-mail
dpredoi@gmail.com


Keywords:
hydroxyapatite, APV, zinc, water remediation


Abstract:
Due to the progress made in the industrial sector in present days, the abundance of heavy metals contaminants in groundwaters, wastewaters and soils has become a worldwide problem. The presence of metals such as Pb, As, Cr, Cd, Zn, Ni, Pu, Co, Cu, Sb, U, and V has toxic effects for human health and for the environmental fauna and flora. In this context, the legal standards on environmental safety and control are continuously changing and becoming more restrictive in order to try to attenuate the spread of contaminants in the environment. The recent advances in nanotechnology have allowed the development of numerous processes that can be used for removing heavy metals from contaminated water such as precipitation, ultrafiltration, ion exchange, phytoextraction, etc. Moreover, recently the use of alternative technologies involving low-cost materials as potential adsorbents for the removal of heavy metals have been proposed by the scientific community. One of the most interesting material used as adsorbent due to its high affinity towards metal ions is hydroxyapatite (HAp) and has been extensively studied. The aim of this study, was the synthesis and characterization of novel polyvinyl alcohol coated hydroxyapatite (HAp-APV) for zinc ions removal from water. The HAp-APV nanocomposite’s morphology was investigated by scanning electron microscopy (SEM) and their elemental composition by Energy-dispersive X-ray spectroscopy (EDX). The SEM results revealed the nanometric size of the HAp-APV nanoparticles and the approximately round shape morphology. The ability of HAp-APV nanocomposites to adsorb zinc ions from aqueous solutions were established by batch experiments. The results of the kinetic and equilibrium studies on the removal of Zn (II) from aqueous solutions using HAp-APV nanocomposites emphasized that these materials have a strong affinity towards zinc ions and could be for the development of novel ecological remediation strategies.


Acknowledgement:
This work was supported by the Romanian Ministry of Research and Innovation through the project PN-III-P1-1.2-PCCDI-2017-0134, Contract Nr. 23PCCDI/2018.