Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching
Manganese-containing anode sludge is a common side-product in the electrowinning of zinc. The anode sludge consists mainly of oxidized manganese, but also lesser amounts of lead, calcium, and other minor metals. The impurities present in the anode sludge mandate new recycling strategies for its effi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | ChemEngineering |
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| Online Access: | https://www.mdpi.com/2305-7084/4/2/40 |
| _version_ | 1827714942731550720 |
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| author | Toni Kauppinen Tuomas Vielma Justin Salminen Ulla Lassi |
| author_facet | Toni Kauppinen Tuomas Vielma Justin Salminen Ulla Lassi |
| author_sort | Toni Kauppinen |
| collection | DOAJ |
| description | Manganese-containing anode sludge is a common side-product in the electrowinning of zinc. The anode sludge consists mainly of oxidized manganese, but also lesser amounts of lead, calcium, and other minor metals. The impurities present in the anode sludge mandate new recycling strategies for its efficient use. This work demonstrates a novel method for selective manganese recovery from lead- and calcium-bearing manganese oxide solid residue. Leaching with sulfuric acid in the presence of a selected reducing agent, such as hydrogen peroxide or citric acid, yields a concentrated MnSO<sub>4</sub> solution with high selectivity over calcium and lead. Manganese yields up to 98% can be obtained. Minimization of calcium and lead in final manganese product can be accomplished with the correct choice of leaching conditions. Alongside manganese sulfate solution, leaching residue with high content of lead and silver was also formed. |
| first_indexed | 2024-03-10T19:06:33Z |
| format | Article |
| id | doaj.art-decf8f353604402bb21ce5737a4d018b |
| institution | Directory Open Access Journal |
| issn | 2305-7084 |
| language | English |
| last_indexed | 2024-03-10T19:06:33Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ChemEngineering |
| spelling | doaj.art-decf8f353604402bb21ce5737a4d018b2023-11-20T04:06:26ZengMDPI AGChemEngineering2305-70842020-06-01424010.3390/chemengineering4020040Selective Recovery of Manganese from Anode Sludge Residue by Reductive LeachingToni Kauppinen0Tuomas Vielma1Justin Salminen2Ulla Lassi3Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 3000, FI-90570 Oulu, FinlandResearch Unit of Sustainable Chemistry, University of Oulu, P.O. Box 3000, FI-90570 Oulu, FinlandBoliden Kokkola, Sinkkiaukio 1, FI-67100 Kokkola, FinlandResearch Unit of Sustainable Chemistry, University of Oulu, P.O. Box 3000, FI-90570 Oulu, FinlandManganese-containing anode sludge is a common side-product in the electrowinning of zinc. The anode sludge consists mainly of oxidized manganese, but also lesser amounts of lead, calcium, and other minor metals. The impurities present in the anode sludge mandate new recycling strategies for its efficient use. This work demonstrates a novel method for selective manganese recovery from lead- and calcium-bearing manganese oxide solid residue. Leaching with sulfuric acid in the presence of a selected reducing agent, such as hydrogen peroxide or citric acid, yields a concentrated MnSO<sub>4</sub> solution with high selectivity over calcium and lead. Manganese yields up to 98% can be obtained. Minimization of calcium and lead in final manganese product can be accomplished with the correct choice of leaching conditions. Alongside manganese sulfate solution, leaching residue with high content of lead and silver was also formed.https://www.mdpi.com/2305-7084/4/2/40recyclingmanganesereductive leachinganode sludgeimpurity control |
| spellingShingle | Toni Kauppinen Tuomas Vielma Justin Salminen Ulla Lassi Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching ChemEngineering recycling manganese reductive leaching anode sludge impurity control |
| title | Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching |
| title_full | Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching |
| title_fullStr | Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching |
| title_full_unstemmed | Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching |
| title_short | Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching |
| title_sort | selective recovery of manganese from anode sludge residue by reductive leaching |
| topic | recycling manganese reductive leaching anode sludge impurity control |
| url | https://www.mdpi.com/2305-7084/4/2/40 |
| work_keys_str_mv | AT tonikauppinen selectiverecoveryofmanganesefromanodesludgeresiduebyreductiveleaching AT tuomasvielma selectiverecoveryofmanganesefromanodesludgeresiduebyreductiveleaching AT justinsalminen selectiverecoveryofmanganesefromanodesludgeresiduebyreductiveleaching AT ullalassi selectiverecoveryofmanganesefromanodesludgeresiduebyreductiveleaching |