Oxidic Shield And Its Influence on the Reactivity And Migration of Air-stable Iron Nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F15%3A00002335" target="_blank" >RIV/46747885:24220/15:00002335 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/15:00002335

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Oxidic Shield And Its Influence on the Reactivity And Migration of Air-stable Iron Nanoparticles

Popis výsledku v původním jazyce

Nanoscale Zero Valent Iron (nZVI) can be protected from rapid oxidation by various methods including the use of organic or inorganic molecules. A simple oxide layer allows long-term storage of nZVI on contact with air, as well as safe delivery and simple manipulation. On the other hand, the protection is so good that simple dilution in water cannot deactivate the protective layer and the nanoparticles must be activated prior to their application. The activation process involves preparing concentrated nZVI/water slurry (20% wt.) and leaving it for 48 hours. In the present research, three types of particles with different oxide shell thicknesses were compared in order to assess their reactivity with Cr(VI) as a representative contaminant. The results showed a diminution in the reduction capacity of Cr(VI) with increasing shell thickness. The activation process was able to create irregularities in the protective oxide shell with a thickness of

Název v anglickém jazyce

Oxidic Shield And Its Influence on the Reactivity And Migration of Air-stable Iron Nanoparticles

Popis výsledku anglicky

Nanoscale Zero Valent Iron (nZVI) can be protected from rapid oxidation by various methods including the use of organic or inorganic molecules. A simple oxide layer allows long-term storage of nZVI on contact with air, as well as safe delivery and simple manipulation. On the other hand, the protection is so good that simple dilution in water cannot deactivate the protective layer and the nanoparticles must be activated prior to their application. The activation process involves preparing concentrated nZVI/water slurry (20% wt.) and leaving it for 48 hours. In the present research, three types of particles with different oxide shell thicknesses were compared in order to assess their reactivity with Cr(VI) as a representative contaminant. The results showed a diminution in the reduction capacity of Cr(VI) with increasing shell thickness. The activation process was able to create irregularities in the protective oxide shell with a thickness of

Druh

D - Stať ve sborníku

CEP obor

DN - Vliv životního prostředí na zdraví

OECD FORD obor

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Projekt

<a href="/cs/project/7E13055" target="_blank" >7E13055: Taking NANOtechnological REMediation Processes from Lab Scale to End User Applications for the Restoration of a Clean Environment</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

NANOCON 2015 - International Conference on Nanomaterials - Research and Application

ISBN

978-80-87294-63-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

183-188

Název nakladatele

Tanger, spol. s.r.o., 2015

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

1. 1. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000374708800032