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- Title
Surface Oxidation of Synthetic Pyrrhotite During Wetting-Drying Treatment.
- Authors
Kalinkin, Alexander M.; Forsling, Willis; Makarov, Dmitriy V.; Makarov, Victor N.
- Abstract
The surface changes of synthetic hexagonal pyrrhotite Fe10S11 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. Key words: synthetic pyrrhotite; surface oxidation; wetting-drying treatment; FTIR (DRIFT) spectroscopy; FTIR Raman microscopy; goethite; elemental sulphur; oxidation of sulphides in dumps
- Publication
Environmental Engineering Science, 2000, Vol 17, Issue 6, p329
- ISSN
1092-8758
- Publication type
Article
- DOI
10.1089/ees.2000.17.329