Lecture Notes (PDF) - Aqueous and Environmental Geochemistry
Lecture Notes (PDF) - Aqueous and Environmental Geochemistry
Lecture Notes (PDF) - Aqueous and Environmental Geochemistry
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<strong>Environmental</strong> <strong>Geochemistry</strong>DM Sherman, University of Bristol2007/2008Kinetics of Pyrite Oxidation by OxygenFeS 2 (s) + (7/2)O 2 (g) + H 2 O →Fe 2+ + 2SO 42-(aq) + 2H + (aq)rate (moles/m 2 -s) = 10 !8.10 [O 2] 0.5[H ] 0.11At pH 2.0 in air-saturated conditions [O 2 ] = 10 -3.6 mol/kg, t 1/2 = 16 years for 0.05m 2 /g.Evaporite Deposits of FeSO 4 Under acidic conditions,abiotic oxidation of Fe 2+ isslow. In the Rio Tinto,FeSO 4. nH 2 O precipitatesupon evaporation.Page 4
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