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Pyritic sludge spilled from the 1998 dam failure in Aznalcóllar, Spain, was subjected to chemical and microbiological leaching tests in shake flasks. The sample contained pyrite as the main sulfide mineral and sphalerite and arsenopyrite in minor amounts. The experiments were carried out at ambient and elevated temperatures (22, 45, and 65 °C) using iron-oxidizing bacteria and thermophilic archaea...
This study evaluated the oxidation of research-grade marcasite and pyrite in shake flask experiments using iron-oxidizing bacteria and archaea at 22, 45, and 65 °C. Dissolved iron concentration and pH were monitored at intervals. The results showed that marcasite was more reactive than pyrite to both microbiological and chemical oxidation. These results are consistent with established structural and...
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