Oxidative Dissolution of Sulfide Minerals in Single and Mixed Sulfide Systems under Simulated Acid and Metalliferous Drainage Conditions

Oxidative Dissolution of Sulfide Minerals in Single and Mixed Sulfide Systems under Simulated Acid and Metalliferous Drainage Conditions

Chalcopyrite, galena, and sphalerite commonly coexist with pyrite in sulfidic waste rocks. The aim of this work was to investigate their impact, potentially by galvanic interaction, on pyrite oxidation and acid generation rates under simulated acid and metalliferous drainage conditions. Kinetic leac...

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Veröffentlicht in:Environmental science & technology 2021-02, Vol.55 (4), p.2369-2380
Hauptverfasser: Qian, Gujie, Fan, Rong, Huang, Jianyin, Pring, Allan, Harmer, Sarah L, Zhang, He, Rea, Maria Angelica D, Brugger, Joël, Teasdale, Peter R, Gibson, Christopher T, Schumann, Russell C, Smart, Roger St. C, Gerson, Andrea R
Format: Artikel
Sprache:eng
Schlagworte:
Acids
Chalcopyrite
Contaminants in Aquatic and Terrestrial Environments
Dissolution
Drainage
Energy gap
Experiments
Galena
Leachates
Mimicry
Mine wastes
Minerals
Oxidation
Oxidative Stress
Pyrite
Rocks
Solubility
Sphalerite
Sulfide
Sulfides
Waste storage
Zincblende
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Zusammenfassung:Chalcopyrite, galena, and sphalerite commonly coexist with pyrite in sulfidic waste rocks. The aim of this work was to investigate their impact, potentially by galvanic interaction, on pyrite oxidation and acid generation rates under simulated acid and metalliferous drainage conditions. Kinetic leach column experiments using single-minerals and pyrite with one or two of the other sulfide minerals were carried out at realistic sulfide contents (total sulfide 47% for galena vs
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.0c07136