| Title | Comment on “Pyrite dissolution in acidic media” by M. Descostes, P. Vitorge, and C. Beaucaire |
| Publication Type | Journal Article |
| Journal | Geochimica et Cosmochimica Acta |
| Publication Year | 2006 |
| Publication Date | 10/2006 |
| Volume | 70 |
| Issue | 20 |
| Pagination | 5246 - 5250 |
| Authors | Druschel, G, Borda, M |
| ISSN | 00167037 |
| 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 |
| URL | http://www.uvm.edu/~gdrusche/papers/Druschel%20and%20Borda,%202006%20GCA%20-%20Pyrite%20oxidation%20comment%20paper.pdf |
| DOI | 10.1016/j.gca.2005.07.023 |
| Short Title | Geochimica et Cosmochimica Acta |
