Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate
Although oxidative precipitation by potassium permanganate is a widely recognised process for manganese removal, research dealing with highly contaminated acid mine drainage (AMD) has yet to be performed. The present study investigated the efficiency of KMnO4 in removing manganese from AMD effluents...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/287257 |
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| author | Regeane M. Freitas Thomaz A. G. Perilli Ana Claudia Q. Ladeira |
| author_facet | Regeane M. Freitas Thomaz A. G. Perilli Ana Claudia Q. Ladeira |
| author_sort | Regeane M. Freitas |
| collection | DOAJ |
| description | Although oxidative precipitation by potassium permanganate is a widely recognised process for manganese removal, research dealing with highly contaminated acid mine drainage (AMD) has yet to be performed. The present study investigated the efficiency of KMnO4 in removing manganese from AMD effluents. Samples of AMD that originated from inactive uranium mine in Brazil were chemically characterised and treated by KMnO4 at pH 3.0, 5.0, and 7.0. Analyses by Raman spectroscopy and geochemical modelling using PHREEQC code were employed to assess solid phases. Results indicated that the manganese was rapidly oxidised by KMnO4 in a process enhanced at higher pH. The greatest removal, that is, 99%, occurred at pH 7.0, when treated waters presented manganese levels as low as 1.0 mg/L, the limit established by the Brazilian legislation. Birnessite (MnO2), hausmannite (Mn3O4), and manganite (MnOOH) were detected by Raman spectroscopy. These phases were consistently identified by the geochemical model, which also predicted phases containing iron, uranium, manganese, and aluminium during the correction of the pH as well as bixbyite (Mn2O3), nsutite (MnO2), pyrolusite (MnO2), and fluorite (CaF2) following the KMnO4 addition. |
| format | Article |
| id | doaj-art-3ed1247b7b9b4718b57b762cbbcd0888 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
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| series | Journal of Chemistry |
| spelling | doaj-art-3ed1247b7b9b4718b57b762cbbcd08882025-02-03T01:21:55ZengWileyJournal of Chemistry2090-90632090-90712013-01-01201310.1155/2013/287257287257Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium PermanganateRegeane M. Freitas0Thomaz A. G. Perilli1Ana Claudia Q. Ladeira2Centre for Development of Nuclear Technology (CDTN), Av, Antônio Carlos 6627, Campus UFMG, 31270901 Belo Horizonte, MG, BrazilCentre for Development of Nuclear Technology (CDTN), Av, Antônio Carlos 6627, Campus UFMG, 31270901 Belo Horizonte, MG, BrazilCentre for Development of Nuclear Technology (CDTN), Av, Antônio Carlos 6627, Campus UFMG, 31270901 Belo Horizonte, MG, BrazilAlthough oxidative precipitation by potassium permanganate is a widely recognised process for manganese removal, research dealing with highly contaminated acid mine drainage (AMD) has yet to be performed. The present study investigated the efficiency of KMnO4 in removing manganese from AMD effluents. Samples of AMD that originated from inactive uranium mine in Brazil were chemically characterised and treated by KMnO4 at pH 3.0, 5.0, and 7.0. Analyses by Raman spectroscopy and geochemical modelling using PHREEQC code were employed to assess solid phases. Results indicated that the manganese was rapidly oxidised by KMnO4 in a process enhanced at higher pH. The greatest removal, that is, 99%, occurred at pH 7.0, when treated waters presented manganese levels as low as 1.0 mg/L, the limit established by the Brazilian legislation. Birnessite (MnO2), hausmannite (Mn3O4), and manganite (MnOOH) were detected by Raman spectroscopy. These phases were consistently identified by the geochemical model, which also predicted phases containing iron, uranium, manganese, and aluminium during the correction of the pH as well as bixbyite (Mn2O3), nsutite (MnO2), pyrolusite (MnO2), and fluorite (CaF2) following the KMnO4 addition.http://dx.doi.org/10.1155/2013/287257 |
| spellingShingle | Regeane M. Freitas Thomaz A. G. Perilli Ana Claudia Q. Ladeira Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate Journal of Chemistry |
| title | Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate |
| title_full | Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate |
| title_fullStr | Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate |
| title_full_unstemmed | Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate |
| title_short | Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate |
| title_sort | oxidative precipitation of manganese from acid mine drainage by potassium permanganate |
| url | http://dx.doi.org/10.1155/2013/287257 |
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