Using Silica Coated Nanoscale Zerovalent Particles for the Reduction of Chlorinated Ethylenes
- Author(s)
- Lenka Honetschlägerová, Petra Janouškovcová, Milica Velimirovic-Fanfani, Martin Kubal, Leen Bastiaens
- Abstract
The impact of a silica coating on the degradation potential of nanoscale zerovalent iron (nZVI) particles toward a mixture
of chlorinated ethylenes is presented. The newly employed stabilization method for nZVI, based on silica deposition from
saturated sodium silicate water glass, produces nZVI particles with a similar reactivity as non-stabilized particles. Moreover
the removal rate constant kM of trichloroethylene (0.1740 L g−1 d−1 Fe0) and cis-dichloroethylene (0.1045 L g−1 d−1 Fe0)
was significantly improved (almost by a factor of 2) for stabilized nZVI. X-ray photoelectron spectroscopy (XPS) and
Wavelength Dispersive X-ray Fluorescence (WDXRF) analyzes revealed a high durability of silica coating and the coating
left at least half of nZVI surface silica free for reaction for more than 5 weeks. The silica coating did not affect the
surface composition of silica coated nZVI which was confirmed by the very similar distribution of degradation products
and corrosion products (Fe3O4, FeOOH) as was found for non-coated nanoparticles. An enhanced reactivity supplemented
with a stable corrosion properties indicates that silica coated nZVI has potential as an efficient remediation agent toward
chlorinated ethylenes.- Organisation(s)
- External organisation(s)
- University of Chemistry and Technology, Prague, Flemish Institute for Technological Research (VITO)
- Journal
- Silicon
- Volume
- 10
- Pages
- 2593–2601
- No. of pages
- 9
- ISSN
- 1876-990X
- DOI
- https://doi.org/10.1007/s12633-018-9795-2
- Publication date
- 04-2018
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 210001 Nanoanalytics, 104023 Environmental chemistry, 105906 Environmental geosciences, 210004 Nanomaterials
- Keywords
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6fc49540-958c-4de6-9f0e-ed04576c0aa8