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Surface oxidation of synthetic pyrrhotite during wetting-drying treatment
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Kola Science Centre, Russian Academy of Sciences, Apatity.
Kola Science Centre, Russian Academy of Sciences, Apatity.
2000 (English)In: Environmental Engineering Science, ISSN 1092-8758, E-ISSN 1557-9018, Vol. 17, no 6, p. 329-335Article in journal (Refereed) Published
Abstract [en]

The surface changes of synthetic hexagonal pyrrhotite Fe[10]S[11] during laboratory wetting-drying treatment at 45°C were investigated using FTIR (DRIFT) spectroscopy, FTIR Raman microscopy, and scanning electron microscopy. α-FeO(OH) (goethite) and elemental sulphur were the main products of the surface pyrrhotite oxidation. The formation of goethite and elemental sulphur was studied on the basis of the corrosion theory and using a potential-pH (Pourbaix) diagram. The appearance of oxidation products on the surface of pyrrhotite grains was detected between 10 and 20 h of treatment. The obtained results can be used for comparison of oxidation processes of synthetic pyrrhotite with that of natural sulphide minerals in dumps.

Place, publisher, year, edition, pages
2000. Vol. 17, no 6, p. 329-335
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-5842Local ID: 406ea370-b79e-11db-abff-000ea68e967bOAI: oai:DiVA.org:ltu-5842DiVA, id: diva2:978718
Note
Validerad; 2000; 20070208 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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