uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Zinc immobilization by zerovalent Fe: surface chemistry and mineralogy and reaction products
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2003 (English)In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 67, no 6, 1285-1298 p.Article in journal (Refereed) Published
Abstract [en]

In bioreactor systems for the treatment of metal-contaminated water, pretreatment with zerovalent Fe can be exploited for oxygen consumption and H-2 Production. In this study, a column experiment is used to investigate the changes in surface chemistry and solid phase products that result from the reaction of a Zn-sulphate-lactate solution with zerovalent Fe filings. The results of this study indicate that zerovalent Fe is very effective in immobilizing dissolved Zn with a porewater residence time of 1.3-3.1 days. A combination of X-ray diffractometry, X-ray photoelectron spectroscopy, and mineral equilibria calculations indicates that Zn precipitates as Zn(OH)(2) and zincite at PH 9-10. At PH approximate to 6, Zn primarily adsorbs to abundant ferric oxyhydroxides, although incorporation in green rust is also considered. During the course of the experiment, the surface mineralogy changes from magnetite-lepidocrocite-goethite to green rust-akaganeite-goethite. The results suggest that the zerovalent Fe surface becomes passivated by a surface film of ferric oxyhydroxides, green rust and organic material, so that the rate of electron transfer and proton consuming reactions (i.e. oxygen consumption, H-2 generation) declines, resulting in a decrease in solution PH.

Place, publisher, year, edition, pages
2003. Vol. 67, no 6, 1285-1298 p.
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:uu:diva-47156DOI: 10.1180/0026461036760165OAI: oai:DiVA.org:uu-47156DiVA: diva2:75063
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2012-01-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Herbert, Roger B
By organisation
Department of Earth Sciences
In the same journal
Mineralogical magazine
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 384 hits
ReferencesLink to record
Permanent link

Direct link