The mechanism of contaminant removal in Fe(0)/H2O systems: The burden of a poor literature review.
In: Chemosphere, Jg. 280 (2021-10-01), S. N.PAG
Online
academicJournal
Zugriff:
The global effort to mitigate the impact of environmental pollution has led to the use of various types of metallic iron (Fe(0)) in the remediation of soil and groundwater as well as in the treatment of industrial and municipal effluents. During the past three decades, hundreds of scientific publications have controversially discussed the mechanism of contaminant removal in Fe(0)/H 2 O systems, with the large majority considering Fe(0) to be oxidized by contaminants of concern. This view assumes that contaminant reduction is the cathodic reaction occurring simultaneously with Fe0 oxidative dissolution (anodic reaction). This view contradicts the century-old theory of the electrochemical nature of aqueous iron corrosion and hinders progress in designing efficient and sustainable remediation Fe(0)/H 2 O systems. The aim of the present communication is to demonstrate the fallacy of the current prevailing view based on articles published before 1910. It is shown that properly reviewing the literature would have avoided the mistake. Going back to the roots is recommended as the way forward and should be considered first while designing laboratory experiments. • Metallic iron (Fe0) is currently mainly regarded as an environmental reducing agent. • Is is known for a century that, at pH values > 4.5, Fe0 is oxidized only by protons. • The current design and operation of Fe0-based systems is not based on their chemistry. • The time is ripe to base system design on the physico-chemistry of Fe0 corrosion. [ABSTRACT FROM AUTHOR]
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The mechanism of contaminant removal in Fe(0)/H2O systems: The burden of a poor literature review.
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Autor/in / Beteiligte Person: | Cao, Viet ; Ndé-Tchoupé, Arnaud Igor ; Hu, Rui ; Gwenzi, Willis ; Noubactep, Chicgoua |
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Zeitschrift: | Chemosphere, Jg. 280 (2021-10-01), S. N.PAG |
Veröffentlichung: | 2021 |
Medientyp: | academicJournal |
ISSN: | 0045-6535 (print) |
DOI: | 10.1016/j.chemosphere.2021.130614 |
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