期刊
APPLIED SURFACE SCIENCE
卷 410, 期 -, 页码 126-133出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.03.058
关键词
Malachite; Activation mechanism; Ammonium ions; Sulfidation; DFT
类别
资金
- National Natural Science Foundation of China [514041198251464029]
- China Postdoctoral Science Foundation [2016M592718]
- Analyis and Testing Foundation of KUST [2016T20130146]
The activation mechanism of ammonium ions on the sulfidation of malachite (-201) was determined by density functional theory (DFT) calculations. Results of DFT calculations indicated that interlayer sulfidation occurs during the sulfidation process of malachite (-201). The absorption of both the ammonium ion and sulfide ion on the malachite (-201) surface is stronger than that of sulfur ion. After sulfidation was activated with ammonium ion, the Cu 3d orbital peak is closer to the Fermi level and characterized by a stronger peak value. Therefore, the addition of ammonium ions activated the sulfidation of malachite (-201), thereby improving the flotation performance. (C) 2017 Elsevier B.V. All rights reserved.
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