Comment on “Pyrite dissolution in acidic media” by M. Descostes, P. Vitorge, and C. Beaucaire


TitleComment on “Pyrite dissolution in acidic media” by M. Descostes, P. Vitorge, and C. Beaucaire
Publication TypeJournal Article
Year of Publication2006
AuthorsDruschel, G, Borda, M
JournalGeochimica et Cosmochimica Acta
Volume70
Issue20
Pagination5246 - 5250
Date Published10/2006
ISSN00167037
Abstract

In a recent paper, Descostes et al. (2004) present data
on a series of pyrite oxidation batch experiments conducted near pH 2 and 3 where they demonstrate very well the
non-stoichiometric dissolution/oxidation of pyrite in acidic solutions through an extensive laboratory investigation
of S/Fe ratios. The authors utilized this data to propose a
‘mechanism’ of pyrite oxidation based on these data. They
conclude that measured sulfur deficiencies are due to a set
of reactions involving thiosulfate ðS2O3
2
Þ and tetrathionate ðS4O6
2
Þ as the primary argument for presenting a
specific pathway controlling pyrite oxidation. Using data
taken from current literature, we challenge these assumptions regarding thiosulfate and tetrathionate reactivity and
redefine these results in the context of a more complex,
and more consistent, representation of pyrite oxidation
pathways

URLhttp://www.uvm.edu/~gdrusche/papers/Druschel%20and%20Borda,%202006%20GCA%20-%20Pyrite%20oxidation%20comment%20paper.pdf
DOI10.1016/j.gca.2005.07.023
Short TitleGeochimica et Cosmochimica Acta
Status: 
Published
Attributale Grant: 
IRWE
Grant Year: 
Year4 (Select this year for NEW RACC products)