ACTIVATION OF AIR-STABLE ZERO-VALENT IRON NANOPARTICLES: COMPARISION OF DIFFERENT APPROACHES

1,2 VÍCHOVÁ Viktorie
Co-authors:
2 OBORNÁ Jana 2 JAKUBEC Petr 2 FILIP Jan
Institutions:
1 Department of Experimental Physics, Faculty of Science, Palacký University in Olomouc, Czech Republic, EU, viktorie.vichova@upol.cz
2 Regional Centre of Advanced Technologies and Materials, Palacký University in Olomouc, Czech Republic, EU
Conference:
12th International Conference on Nanomaterials - Research & Application, Brno, Czech Republic, EU, October 21 - 23, 2020
Proceedings:
Proceedings 12th International Conference on Nanomaterials - Research & Application
Pages:
237-242
ISBN:
978-80-87294-98-7
ISSN:
2694-930X
Published:
28th December 2020
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
545 views / 348 downloads
Abstract

Nanoscale zero-valent iron (nZVI) particles represent a strong reducing agent which makes them highly promising in the process of degradation of organic compounds such as persistent chlorinated compounds (e.g. chlorinated ethylenes) as well as immobilisation of inorganic pollutants (e.g. hazardous elements). In this contribution, we compare several types of activation procedures to restore the reactivity of air-stable nZVI particles. Different approaches to increase the reactivity of nZVI particles have been tested for hexavalent chromium (Cr(VI)) removal. The study was supplemented by complex characterisation of nZVI particles including electrochemical impedance spectroscopy, X-ray powder diffraction, transmission electron microscopy and specific surface area measurement. Based on experiments of contaminant removal capacity and the characterization of activated nZVI particles, we can conclude that the short-time high-temperature activation process is the most efficient.

Keywords: Air-stable zero-valent iron nanoparticles, activation process, hexavalent chromium removal, groundwater remediation

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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