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Environmental Geochemistry of Sulfide Oxidation
Abstract
We measured the rates of reaction of Fe(III) with galena, sphalerite, chalcopyrite, and arsenopyrite at 25°C and pH values near two and found: Where rFe3+ is the rate of reduction of Fe(III) to Fe(II) (mol sec-1), mFe3+ is the concentration of Fe(III) (mol kg-1), and A is the surface area of the solid (m2) exposed to the solution. These results show that the reaction rates, the reaction orders and the activation energies vary substantially from mineral to mineral indicating that the details of the reaction mechanism differ among the various sulfide minerals. This means that pyrite cannot be used as a proxy for these other sulfide minerals when studying the details of sulfide mineral oxidation.
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Cited by
Arsenic in the Soil Environment: A Review
Smith, E., Naidu, R., & Alston, A. M. (1998) · Advances in Agronomy · doi:10.1016/s0065-2113(08)60504-0 · Cited by 649
Nordstrom, D. K., & Alpers, C. N. (1999) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.96.7.3455 · Cited by 561
Cánovas, C. R., Olías, M., Nieto, J. M., Sarmiento, A. M., & Cerón, J. C. (2007) · Science of The Total Environment · doi:10.1016/j.scitotenv.2006.11.022 · Cited by 189
Rates and mechanisms of chemical weathering of ferromagnesian silicate minerals on Mars
Burns, R. G. (1993) · Geochimica et Cosmochimica Acta · doi:10.1016/0016-7037(93)90182-v · Cited by 185
Chemical divides and evaporite assemblages on Mars
Tosca, N. J., & McLennan, S. M. (2006) · Earth and Planetary Science Letters · doi:10.1016/j.epsl.2005.10.021 · Cited by 151
Metadata
- Venue
- ACS Symposium Series
- Publisher
- American Chemical Society
- Published
- 1993-12-20
- ISSN
- 0097-6156 (ISSN-L)
- 1947-5918
- OpenAlex
- W1441423521
- Cited by
- 376
- References
- 0
- FWCI
- 33.04
- Type
- conference paper
- Language
- en
- Open access
- closed
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