Nitrogen activation of carbon-encapsulated zero-valent iron nanoparticles and influence of the activation temperature on heavy metals removal

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Title: Nitrogen activation of carbon-encapsulated zero-valent iron nanoparticles and influence of the activation temperature on heavy metals removal
Authors: Bonaiti, Stefania | Calderón Roca, Blanca | Collina, Elena | Lasagni, Marina | Mezzanotte, Valeria | Aracil, Ignacio | Fullana, Andres
Research Group/s: Residuos, Energía, Medio Ambiente y Nanotecnología (REMAN)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Química
Keywords: Nitrogen activation | Carbon-encapsulated | Zero-valent iron nanoparticles | Activation temperature | Heavy metals removal
Knowledge Area: Ingeniería Química
Issue Date: 2017
Publisher: IOP Publishing
Citation: IOP Conference Series: Earth and Environmental Science. 2017, 64: 012070. doi:10.1088/1755-1315/64/1/012070
Abstract: Nanoparticles of zero-valent iron (nZVI) represent a promising agent for environmental remediation. This is due to their core-shell structure which presents the characteristics of both metallic and oxidised iron, leading to sorption and reductive precipitation of metal ions. Nevertheless, nZVI application presents some limitations regarding their rapid oxidation and aggregation in the media which leads to the delivery of the ions after some hours (the "aging effect"). To address these issues, modifications of nZVI structure and synthesis methods have been developed in the last years. The aging problem was solved by using nZVI encapsulated inside carbon spheres (CE-nZVI), synthetized through Hydrothermal Carbonization (HTC). Results showed high heavy metals removal percentage. Furthermore, CE-nZVI were activated with nitrogen in order to increase the metallic iron content. The aim of this study was to test CE-nZVI post-treated with nitrogen at different temperatures in heavy metals removal, demonstrating that the influence of the temperature was negligible in nanoparticles removal efficiency.
Sponsor: This work was financially supported by University of Milano-Bicocca fund (2016-ATESP-0597) and University of Alicante (UAFPU2013-5791).
ISSN: 1755-1307 (Print) | 1755-1315 (Online)
DOI: 10.1088/1755-1315/64/1/012070
Language: eng
Type: info:eu-repo/semantics/article
Rights: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Peer Review: si
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Appears in Collections:INV - REMAN - Artículos de Revistas

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