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• W2898773938 startingPage "148" @default.
• W2898773938 abstract "In this work, effective two-step processes for recovering manganese (Mn), as well as zinc (Zn), from a rich Mn residue, that mainly consists of Mn and carbon with lesser amounts of Zn and Fe, are proposed. First, three different methods (conventional, ultrasound- and microwave-assisted) were evaluated for reductive acid leaching of the residue. Subsequently, two different strategies for purification of Mn from the leachate were considered: oxidative precipitation of Mn with persulfate and solvent extraction with Cyanex 302 as the extractant. The results showed that microwave-assisted leaching was the most effective in terms of the percentage of metal leached (with 98 and 100% of Mn and Zn, respectively) as well as the effectiveness of time and reagent consumption. Both Mn purification strategies were effective; with the oxidative precipitation, a 99.7% pure MnO2 precipitate and 3.30 g/L Zn solution with a purity of 99.9% were obtained at a global yield of 97.4 and 94.8%, respectively. Solvent extraction resulted in a 32.6 g/L Mn solution with a purity of 99.9% and 35.2 g/L Zn solution with a purity of 98.4%, with global yields of 96.3 and 100%, respectively. Based on these results, a sequential two-step procedure for recovering all valuable products (Mn, Zn and graphite) with high efficiency from a Mn rich residue is proposed." @default.
• W2898773938 created "2018-11-09" @default.
• W2898773938 creator A5048253498 @default.
• W2898773938 creator A5069865400 @default.
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• W2898773938 date "2019-01-01" @default.
• W2898773938 modified "2023-10-14" @default.
• W2898773938 title "Evaluation of two-step processes for the selective recovery of Mn from a rich Mn residue" @default.
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• W2898773938 doi "https://doi.org/10.1016/j.mineng.2018.10.014" @default.
• W2898773938 hasPublicationYear "2019" @default.
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