Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water
1
Environmental Science & Technology Group (ESTg), Department of Chemical &Materials Engineering, Nazarbayev University, Nur-Sultan 010000, Kazakhstan
2
The Environment & Resource Efficiency Cluster (EREC), Nazarbayev University, Nur-Sultan 010000, Kazakhstan
3
Department of Chemistry, Nazarbayev University, Nur-Sultan 010000, Kazakhstan
4
Lab of Chemical Engineering & Engineering Sustainability, Faculty of Pure & Applied Science, Open University of Cyprus, GiannouKranidioti 33, Nicosia 2220, Cyprus
*
Authors to whom correspondence should be addressed.
Sustainability 2020, 12(13), 5489; https://doi.org/10.3390/su12135489
Received: 12 May 2020 / Revised: 20 June 2020 / Accepted: 23 June 2020 / Published: 7 July 2020
(This article belongs to the Special Issue Sustainable Management of Heavy Metals)
In this study, magnetic Fe3O4 particles and Fe3O4-Ag0 nanocomposites were prepared by a facile and green method, fully characterized and used for the removal of Hg2+ from water. Characterizations showed that the Fe3O4 particles are quasi-spherical with an average diameter of 217 nm and metallic silver nanoparticles formed on the surface with a size of 23–41 nm. The initial Hg2+ removal rate was very fast followed by a slow increase and the maximum solid phase loading was 71.3 mg/g for the Fe3O4-Ag0 and 28 mg/g for the bare Fe3O4. The removal mechanism is complex, involving Hg2+ adsorption and reduction, Fe2+ and Ag0 oxidation accompanied with reactions of Cl− with Hg+ and Ag+. The facile and green synthesis process, the fast kinetics and high removal capacity and the possibility of magnetic separation make Fe3O4-Ag0 nanocomposites attractive materials for the removal of Hg2+ from water.
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Keywords:
nanocomposites; magnetite; silver; mercury; amalgamation
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MDPI and ACS Style
Inglezakis, V.J.; Kurbanova, A.; Molkenova, A.; Zorpas, A.A.; Atabaev, T.S. Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water. Sustainability 2020, 12, 5489. https://doi.org/10.3390/su12135489
AMA Style
Inglezakis VJ, Kurbanova A, Molkenova A, Zorpas AA, Atabaev TS. Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water. Sustainability. 2020; 12(13):5489. https://doi.org/10.3390/su12135489
Chicago/Turabian StyleInglezakis, Vassilis J., Aliya Kurbanova, Anara Molkenova, Antonis A. Zorpas, and Timur S. Atabaev 2020. "Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water" Sustainability 12, no. 13: 5489. https://doi.org/10.3390/su12135489
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