Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F12%3A43893800" target="_blank" >RIV/60461373:22320/12:43893800 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica

Popis výsledku v původním jazyce

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,

Název v anglickém jazyce

Degradation of chlorinated ethylenes by nanoscale zerovalent iron modified with silica

Popis výsledku anglicky

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,

Druh

D - Stať ve sborníku

CEP obor

DK - Kontaminace a dekontaminace půdy včetně pesticidů

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NANOCON 2012 Conference Proceedings 4th International conference

ISBN

978-80-87294-32-1

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

TANGER

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

23. 10. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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