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

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

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

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Article name in the collection

XXXVII. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference

ISBN

978-80-905221-5-2

ISSN

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e-ISSN

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Number of pages

5

Pages from-to

261-265

Publisher name

Best servis

Place of publication

Ústí nad Labem

Event location

Jetřichovice

Event date

May 15, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000432424300058