Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 780, Issue -, Pages 32-37Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2016.08.033
Keywords
Electrolytic manganese residue; Extraction; Manganese; Electrochemical
Categories
Funding
- National Natural Science Foundation of China [51274261, 51404043]
- Chongqing University Postgraduates' Innovation Project
- Key Project of Basic Science and Research in Cutting-edge Technologies of Chongqing, China [cstc2015jcyjBX0074]
- National Science-Technology Support Plan Projects [2015BAB17B03]
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High-valent manganese was hard to be extracted from electrolytic manganese residues. To strengthen the-extraction of Mn, electrochemical extraction method was investigated in this work. The mechanisms of the electrochemical extraction were examined along with the electrochemical performance of the reaction system via X-ray diffraction, scanning electron microscopy, X-ray Fluorescence, and BET. Results show that high-valent manganese can be reduced effectively under an electric field. The extraction efficiency of manganese reached 96.2% under the optimum conditions of current density 25 mA/cm(2), 92 wt% H2SO4, solid-to-liquid ratio of 1:5, room temperature, 1:1.0 M ratio of Mn to Fe2+ and 60 min extraction. The extraction efficiency of manganese is 51.8% higher than that attained under the same conditions without an electric field and Fe2+. Meanwhile, the manganese content in residue decreased from 234% to 0.09%. (C) 2016 Elsevier B.V. All rights reserved.
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