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Mystery of Ageing of „Zero-Valent Iron“ (ZVI)
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SYSNO ASEP 0475135 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Mystery of Ageing of „Zero-Valent Iron“ (ZVI) Tvůrce(i) Wouafo, M. T. (CM)
Donkeng Dazie, Joel (UFCH-W) RID, ORCID
Tchatchueng, J. B. (CM)
Noubactep, Ch. (DE)
Ludvík, Jiří (UFCH-W) RID, ORCIDZdroj.dok. XXXVII. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference. - Ústí nad Labem : Best servis, 2017 / Navrátil Tomáš ; Fojta Miroslav ; Schwarzová Karolína - ISBN 978-80-905221-5-2 Rozsah stran s. 261-265 Poč.str. 5 s. Forma vydání Tištěná - P Akce Moderní elektrochemické metody /37./ Datum konání 15.05.2017 - 19.05.2017 Místo konání Jetřichovice Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova zero-valent iron ; aging effect ; zinc ion removal Vědní obor RIV CG - Elektrochemie Obor OECD Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000432424300058 Anotace So called „zero-valent iron“, (ZVI), is used for water treatment, or, more generally for
environmental remediation. In fact, the surface of the metallic iron powder in the presence of
water and oxygen cannot be considered as pure Fe0 but as a mixture of its corrosion products.
The remediation process occurs on the surface of these iron particles, hence, the degree of
„corrosion“ is crucial for the process itself. Therefore, investigation of „aging“ of ZVI is an
important prerequisite for deeper understanding of its activity.
In this work, the first results of the systematic study of aging of iron metal powder are
presented. The investigation was performed in batch conditions in aqueous buffered solutions
pH 4, 4.7, 5.5 and in the presence of air oxygen. Increasing and then decreasing concentration
of the Fe2+ ion in the solution appeared to be the important marker of aging process.
In the second part of the work, removal of Zn2+ ions using ZVI was investigated.
Electrochemical techniques, namely polarography and its differential pulse form (DPP) were
used for permanent monitoring of the presence of Fe2+ and Zn2+ ions in the studied solution.
Changing concentrations of both ions revealed that at pH 5.5 the optimum aging time of ZVI
for removal of Zn2+ from aqueous solution is 6 hours.Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2018
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