Anaerobic pyrite oxidation rates determined via direct volume-loss 
measurements: A Vertical Scanning Interferometric approach

Avery, E. R.; Benning, Liane G.

doi:10.1180/minmag.2008.072.1.15

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Anaerobic pyrite oxidation rates determined via direct volume-loss measurements: A Vertical Scanning Interferometric approach

Authors

Avery, E. R.
External Organizations;

/persons/resource/benning

Benning, Liane G.
0 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

External Ressource

No external resources are shared

Fulltext (public)

There are no public fulltexts stored in GFZpublic

Supplementary Material (public)

There is no public supplementary material available

Citation

Avery, E. R., Benning, L. G. (2008): Anaerobic pyrite oxidation rates determined via direct volume-loss measurements: A Vertical Scanning Interferometric approach. - Mineralogical Magazine, 72, 1, 15-18.
https://doi.org/10.1180/minmag.2008.072.1.15

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_806896

Abstract

Presented here are quantitative dissolution rate data (Volume of pyrite lost/time) for the inorganic oxidation of pyrite in synthetic, anaerobic and acidic (pH 2) hydrothermal vent fluids (HVF) from experiments where the volume toss was measured directly via Vertical Scanning Interferometry (VSI). The VSI-derived reaction rate was 2.12 x 10(-10) +/- 1.14 x 10(-11) mol/m(2)/min, which is similar to 2 to 4 orders of magnitude slower than pyrite oxidation rates previously determined using traditional batch experiments where rates are calculated based on changes in Solution chemistry. This lower rate stems primarily from differences in experimental conditions (i.e. water to rock ratios, vigorous vs. gentle stir rates, grain-size effects, time), yet the rates derived here are believed to be more representative of pyrite oxidation in natural environments where more static and high solution to solid rate conditions prevail, such as seafloor conditions or acid-mine-drainage environments.