Lecture Notes (PDF) - Aqueous and Environmental Geochemistry

More documents

Recommendations

Info

Environmental GeochemistryDM Sherman, University of Bristol2007/2008The Rio Tinto (Spain)SW Spain, mining activity for > 3000 years.Pyrite (FeS 2 )Pyrite is the most commonsulfide mineral and occursassociated with hydrothermalore deposits and in coalderived from marine deposits.In pyrite theoxidation state ofsulfur is -1 (S 2-2)Page 2
Environmental GeochemistryDM Sherman, University of Bristol2007/2008Pyrite/FeOOH Stability(species in italics are aqueous complexes)Acid Generation by S 22-OxidationOxidation of S2-2 generates H +FeS 2 (s) + (7/2)O 2 (g) + H 2 O →Fe 2+ + 2SO2-4 (aq) + 2H + (aq)Oxidation of S 2- does not generate H +CuFeS 2 (s) + 4O 2 (g) → Cu +2 + Fe 2+ + 2SO 42-(aq)FeS(s) + 2O 2 (g) → Fe 2+ + SO 42-(aq)ZnS(s) + 2O 2 (g) → Zn 2+ + SO 42-(aq)Page 3
Page 1: Environmental GeochemistryDM Sherma
Page 5 and 6: Environmental GeochemistryDM Sherma
Page 11: Environmental GeochemistryDM Sherma

Lecture Notes (PDF) - Aqueous and Environmental Geochemistry

Create successful ePaper yourself

Delete template?

Save as template?