dc.contributor.author | Noubactep, Chicgoua | |
dc.date.accessioned | 2010-11-24T15:58:35Z | |
dc.date.available | 2010-11-24T15:58:35Z | |
dc.date.issued | 2007 | |
dc.identifier.citation | The open environmental journal; Vol. 1.2007, p. 9-13 | |
dc.identifier.uri | http://hdl.handle.net/11858/00-1735-0000-0001-33E5-C | |
dc.description.abstract | The mechanism of aqueous contaminant removal by elemental iron (Fe0) materials (e.g., in Fe0-H2O systems) has been largely discussed in the iron technology literature. Two major removal mechanisms are usually discussed: (i) contaminant adsorption onto Fe0 oxidation products, and (ii) contaminant reduction by Fe0, FeII or H/H2. However, a closer inspection of the chemistry of the Fe0-H2O system reveals that co-precipitation could be the primary removal mechanism. The plausibility of contaminant co-precipitation with iron corrosion products as independent contaminant removal mechanism is discussed here. It shows that the current concept does not take into account that the corrosion product generation is a dynamic process in the course of which contaminants are entrapped in the matrix of iron hydroxides. It is recalled that contaminant co-precipitation with iron hydroxides/oxides is an unspecific removal mechanism. Contaminant co-precipitation as primary removal mechanism is compatible with subsequent reduction and explains why redoxinsensitive species are quantitatively removed. Adsorption and co-precipitation precede reduction and abiotic reduction, when it takes place, occurs independently by a direct (electrons from Fe0) or an indirect (electrons from FeII/H2) mechanism. | |
dc.format.extent | 5 S. | |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | |
dc.relation.ispartofseries | The open environmental journal | |
dc.rights.uri | http://e-docs.geo-leo.de/rights | |
dc.subject.ddc | 551.9 | |
dc.subject.gok | VJF 000 | |
dc.title | Processes of Contaminant Removal in Fe0-H2O Systems Revisited: The Importance of Co-Precipitation | |
dc.type | article | |
dc.subject.gokverbal | Umweltgeochemie insgesamt | |
dc.bibliographicCitation.volume | 1 | |
dc.bibliographicCitation.firstPage | 9 | |
dc.bibliographicCitation.lastPage | 13 | |
dc.identifier.doi | 10.23689/fidgeo-823 | |
dc.identifier.ppn | 571842593 | |
dc.type.version | publishedVersion | |
dc.bibliographicCitation.journal | The open environmental journal | |
dc.relation.collection | Geologische Wissenschaften | |
dc.description.type | research | |