Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media
This paper reports the leaching of seafloor massive sulphides (SMS) from the Loki’s Castle area at the Arctic Mid-Ocean Ridge in sulphuric acid with manganese dioxide and sodium chloride. The results presented are of various leaching experiments conducted under different conditions in orde...
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MDPI AG
2018-05-01
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| Series: | Minerals |
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| Online Access: | http://www.mdpi.com/2075-163X/8/6/235 |
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doaj-8cb64d358e974a6f96512be5bad96d042020-11-24T20:51:11ZengMDPI AGMinerals2075-163X2018-05-018623510.3390/min8060235min8060235Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl MediaPrzemyslaw B. Kowalczuk0Dan Oliric Manaig1Kristian Drivenes2Ben Snook3Kurt Aasly4Rolf Arne Kleiv5Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands vei 1, 7491 Trondheim, NorwaySchool of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, CanadaDepartment of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands vei 1, 7491 Trondheim, NorwayDepartment of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands vei 1, 7491 Trondheim, NorwayDepartment of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands vei 1, 7491 Trondheim, NorwayDepartment of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands vei 1, 7491 Trondheim, NorwayThis paper reports the leaching of seafloor massive sulphides (SMS) from the Loki’s Castle area at the Arctic Mid-Ocean Ridge in sulphuric acid with manganese dioxide and sodium chloride. The results presented are of various leaching experiments conducted under different conditions in order to optimise the dissolution of copper and silver. It was shown that the main copper bearing minerals in the SMS were chalcopyrite and isocubanite, while silver could occur as an admixture in the crystallographic lattice of sulphides or as disseminated micro inclusions. Based on the results, the leaching mechanism was discussed and elucidated. It was shown that the dissolution of the SMS was mainly due to galvanic interactions between the primary marine minerals of SMS and manganese dioxide. Addition of sodium chloride promoted the extraction mechanism.http://www.mdpi.com/2075-163X/8/6/235leachingchalcopyriteisocubanitecoppersilvermanganese dioxidemarine mineralsdeep-sea mining |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Przemyslaw B. Kowalczuk Dan Oliric Manaig Kristian Drivenes Ben Snook Kurt Aasly Rolf Arne Kleiv |
| spellingShingle |
Przemyslaw B. Kowalczuk Dan Oliric Manaig Kristian Drivenes Ben Snook Kurt Aasly Rolf Arne Kleiv Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media Minerals leaching chalcopyrite isocubanite copper silver manganese dioxide marine minerals deep-sea mining |
| author_facet |
Przemyslaw B. Kowalczuk Dan Oliric Manaig Kristian Drivenes Ben Snook Kurt Aasly Rolf Arne Kleiv |
| author_sort |
Przemyslaw B. Kowalczuk |
| title |
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media |
| title_short |
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media |
| title_full |
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media |
| title_fullStr |
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media |
| title_full_unstemmed |
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media |
| title_sort |
galvanic leaching of seafloor massive sulphides using mno2 in h2so4-nacl media |
| publisher |
MDPI AG |
| series |
Minerals |
| issn |
2075-163X |
| publishDate |
2018-05-01 |
| description |
This paper reports the leaching of seafloor massive sulphides (SMS) from the Loki’s Castle area at the Arctic Mid-Ocean Ridge in sulphuric acid with manganese dioxide and sodium chloride. The results presented are of various leaching experiments conducted under different conditions in order to optimise the dissolution of copper and silver. It was shown that the main copper bearing minerals in the SMS were chalcopyrite and isocubanite, while silver could occur as an admixture in the crystallographic lattice of sulphides or as disseminated micro inclusions. Based on the results, the leaching mechanism was discussed and elucidated. It was shown that the dissolution of the SMS was mainly due to galvanic interactions between the primary marine minerals of SMS and manganese dioxide. Addition of sodium chloride promoted the extraction mechanism. |
| topic |
leaching chalcopyrite isocubanite copper silver manganese dioxide marine minerals deep-sea mining |
| url |
http://www.mdpi.com/2075-163X/8/6/235 |
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