guest ::
| Home > Conference materials > Papers > Mystery of Ageing of „Zero-Valent Iron“ (ZVI) |
Original title:
Mystery of Ageing of „Zero-Valent Iron“ (ZVI)
Authors: Wouafo, M. T. ; Donkeng Dazie, Joel ; Tchatchueng, J. B. ; Noubactep, Ch. ; Ludvík, Jiří
Document type: Papers
Conference/Event: Moderní elektrochemické metody /37./, Jetřichovice (CZ), 20170515
Year: 2017
Language: eng
Abstract: So called „zero-valent iron“, (ZVI), is used for water treatment, or, more generally for\nenvironmental remediation. In fact, the surface of the metallic iron powder in the presence of\nwater 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 of\n„corrosion“ is crucial for the process itself. Therefore, investigation of „aging“ of ZVI is an\nimportant prerequisite for deeper understanding of its activity.\nIn this work, the first results of the systematic study of aging of iron metal powder are\npresented. The investigation was performed in batch conditions in aqueous buffered solutions\npH 4, 4.7, 5.5 and in the presence of air oxygen. Increasing and then decreasing concentration\nof 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) were\nused 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 ZVI\nfor removal of Zn2+ from aqueous solution is 6 hours.
Keywords: aging effect; zero-valent iron; zinc ion removal
Host item entry: XXXVII. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference, ISBN 978-80-905221-5-2
Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0271990
Permalink: http://www.nusl.cz/ntk/nusl-317292
The record appears in these collections:
Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers
Authors: Wouafo, M. T. ; Donkeng Dazie, Joel ; Tchatchueng, J. B. ; Noubactep, Ch. ; Ludvík, Jiří
Document type: Papers
Conference/Event: Moderní elektrochemické metody /37./, Jetřichovice (CZ), 20170515
Year: 2017
Language: eng
Abstract: So called „zero-valent iron“, (ZVI), is used for water treatment, or, more generally for\nenvironmental remediation. In fact, the surface of the metallic iron powder in the presence of\nwater 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 of\n„corrosion“ is crucial for the process itself. Therefore, investigation of „aging“ of ZVI is an\nimportant prerequisite for deeper understanding of its activity.\nIn this work, the first results of the systematic study of aging of iron metal powder are\npresented. The investigation was performed in batch conditions in aqueous buffered solutions\npH 4, 4.7, 5.5 and in the presence of air oxygen. Increasing and then decreasing concentration\nof 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) were\nused 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 ZVI\nfor removal of Zn2+ from aqueous solution is 6 hours.
Keywords: aging effect; zero-valent iron; zinc ion removal
Host item entry: XXXVII. Moderní elektrochemické metody. Sborník přednášek mezinárodní odborné konference, ISBN 978-80-905221-5-2
Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0271990
Permalink: http://www.nusl.cz/ntk/nusl-317292
The record appears in these collections:
Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers
Record created 2017-06-12, last modified 2023-12-06