Mystery of Ageing of „Zero-Valent Iron“ (ZVI)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00475135" target="_blank" >RIV/61388955:_____/17:00475135 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Mystery of Ageing of „Zero-Valent Iron“ (ZVI)

Popis výsledku v původním jazyce

So called „zero-valent iron“, (ZVI), is used for water treatment, or, more generally fornenvironmental remediation. In fact, the surface of the metallic iron powder in the presence ofnwater and oxygen cannot be considered as pure Fe0 but as a mixture of its corrosion products.nThe remediation process occurs on the surface of these iron particles, hence, the degree ofn„corrosion“ is crucial for the process itself. Therefore, investigation of „aging“ of ZVI is annimportant prerequisite for deeper understanding of its activity.nIn this work, the first results of the systematic study of aging of iron metal powder arenpresented. The investigation was performed in batch conditions in aqueous buffered solutionsnpH 4, 4.7, 5.5 and in the presence of air oxygen. Increasing and then decreasing concentrationnof the Fe2+ ion in the solution appeared to be the important marker of aging process.nIn the second part of the work, removal of Zn2+ ions using ZVI was investigated.nElectrochemical techniques, namely polarography and its differential pulse form (DPP) werenused for permanent monitoring of the presence of Fe2+ and Zn2+ ions in the studied solution.nChanging concentrations of both ions revealed that at pH 5.5 the optimum aging time of ZVInfor removal of Zn2+ from aqueous solution is 6 hours.

Název v anglickém jazyce

Mystery of Ageing of „Zero-Valent Iron“ (ZVI)

Popis výsledku anglicky

So called „zero-valent iron“, (ZVI), is used for water treatment, or, more generally fornenvironmental remediation. In fact, the surface of the metallic iron powder in the presence ofnwater and oxygen cannot be considered as pure Fe0 but as a mixture of its corrosion products.nThe remediation process occurs on the surface of these iron particles, hence, the degree ofn„corrosion“ is crucial for the process itself. Therefore, investigation of „aging“ of ZVI is annimportant prerequisite for deeper understanding of its activity.nIn this work, the first results of the systematic study of aging of iron metal powder arenpresented. The investigation was performed in batch conditions in aqueous buffered solutionsnpH 4, 4.7, 5.5 and in the presence of air oxygen. Increasing and then decreasing concentrationnof the Fe2+ ion in the solution appeared to be the important marker of aging process.nIn the second part of the work, removal of Zn2+ ions using ZVI was investigated.nElectrochemical techniques, namely polarography and its differential pulse form (DPP) werenused for permanent monitoring of the presence of Fe2+ and Zn2+ ions in the studied solution.nChanging concentrations of both ions revealed that at pH 5.5 the optimum aging time of ZVInfor removal of Zn2+ from aqueous solution is 6 hours.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

XXXVII. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference

ISBN

978-80-905221-5-2

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

261-265

Název nakladatele

Best servis

Místo vydání

Ústí nad Labem

Místo konání akce

Jetřichovice

Datum konání akce

15. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000432424300058