Pyrite oxidation
nounPronunciation: /ˈpaɪraɪt ˌɒksɪˈdeɪʃən/
The chemical weathering process whereby iron sulfide minerals (primarily pyrite FeS₂) react with water and oxygen to produce sulfuric acid and ferric hydroxide precipitate. This reaction is a primary generator of acid mine drainage and occurs both during active mining and decades afterward.
Plain English
The rusting of iron sulfide minerals in mines that creates sulfuric acid and pollutes water supplies.
Etymology & History
Usage
"Pyrite oxidation in the exposed rock face accelerated water acidification throughout the reclamation zone."
Style guide notes: Use specific mineral names (pyrite, chalcopyrite) when distinguishing different sulfide reactions.
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Contrasted with
Related Terms
Frequently Asked Questions
What mineral undergoes pyrite oxidation?
Iron sulfide (pyrite, FeS₂) reacts with water and oxygen producing sulfuric acid.
How can pyrite oxidation be slowed at mine sites?
Water coverage, oxygen exclusion barriers, and alkaline amendments reduce oxidation rates.
Why Test Candidates on This?
Fundamental geochemical concept for predicting water quality impacts and treatment requirements.
Required skill level: Mid