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| Description
| - We studied the degradation of different chlorinated ethylenes by silica coated nanoscale zerovalent iron particles nZVI. The silica coated nZVI has improved stability for its subsurface migration and can accelerate the degradation of studied contaminants. The reactivity of studied silica coated nZVI was compared to the uncoated nZVI and microscale zerovalent iron particles. To form the silica coating, the uncoated nanoiron particles in an aqueous suspension were modified by Stöber synthesis using tetraethylorthosilicate (TEOS). Lab-scale degradation experiments were performed in serum bottles containing a mixture of chlorinated ethylenes (? 5 mg.L-1 each) and a certain dose (2.5 - 25 g.L-1) of silica coated nZVI, noncoated nZVI or microscale particles, to simulate conditions on contaminated sites. After five weeks, microscale particles degraded all three contaminants, but the degradation rate was up to two order lower than both nanoiron materials. In the presence of silica coated nZVI, the concentration of PCE, TCE and cis-DCE dropped to 2 %, 39 % and 35 % of an initial concentration. The evaluated kinetic constants of pseudo-first-order kinetics confirmed an increase in the removal rate of PCE for silica coated nZVI. On the contrary, TCE and cis-DCE were significantly fast degraded by nZVI. The change in the removal potential suggests that the silica coating influenced surface properties determining also degradation processes. Nevertheless, our study demonstrated that the silica (TEOS) coated nanoiron particles are suitable for the degradation of chlorinated ethylenes.
- We studied the degradation of different chlorinated ethylenes by silica coated nanoscale zerovalent iron particles nZVI. The silica coated nZVI has improved stability for its subsurface migration and can accelerate the degradation of studied contaminants. The reactivity of studied silica coated nZVI was compared to the uncoated nZVI and microscale zerovalent iron particles. To form the silica coating, the uncoated nanoiron particles in an aqueous suspension were modified by Stöber synthesis using tetraethylorthosilicate (TEOS). Lab-scale degradation experiments were performed in serum bottles containing a mixture of chlorinated ethylenes (? 5 mg.L-1 each) and a certain dose (2.5 - 25 g.L-1) of silica coated nZVI, noncoated nZVI or microscale particles, to simulate conditions on contaminated sites. After five weeks, microscale particles degraded all three contaminants, but the degradation rate was up to two order lower than both nanoiron materials. In the presence of silica coated nZVI, the concentration of PCE, TCE and cis-DCE dropped to 2 %, 39 % and 35 % of an initial concentration. The evaluated kinetic constants of pseudo-first-order kinetics confirmed an increase in the removal rate of PCE for silica coated nZVI. On the contrary, TCE and cis-DCE were significantly fast degraded by nZVI. The change in the removal potential suggests that the silica coating influenced surface properties determining also degradation processes. Nevertheless, our study demonstrated that the silica (TEOS) coated nanoiron particles are suitable for the degradation of chlorinated ethylenes. (en)
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| Title
| - Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica
- Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica (en)
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| skos:prefLabel
| - Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica
- Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica (en)
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| skos:notation
| - RIV/60461373:22320/12:43893800!RIV13-MSM-22320___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22320/12:43893800
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - silica; with; modified; iron; zerovalent; nanoscale; ethylenes; chlorinated; Degradation (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - NANOCON 2012 Conference Proceedings 4th International conference
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Honetschlägerová, Lenka
- Janouškovcová, Petra
- Bastiens, Leen
- Velimirovič, Milica
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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