Synchrotron Radiation Based Study of the Catalytic Mechanism of Ag+ to Chalcopyrite Bioleaching by Mesophilic and Thermophilic Cultures
文献类型：期刊论文
| 作者 | Zheng L(郑雷) ; Ma CY(马陈燕); Zhao YD(赵屹东); Nie, Zhenyuan, Zhang, Weiwei, Liu, Hongchang, Xia, Jinlan, Zhu, Wei, Zhang, Duorui, Zheng, Lei, Ma, Chenyan, Zhao, Yidong; Wen, Wen
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| 刊名 | MINERALS
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:9页码:382 |
| 关键词 | chalcopyrite bioleaching Ag+ mesophilic culture thermophilic culture SR-XRD XANES |
| ISSN号 | 2075-163X |
| DOI | 10.3390/min8090382 |
| 文献子类 | Article |
| 英文摘要 | The catalytic mechanism of Ag+ for chalcopyrite bioleaching by mesophilic culture (at 30 degrees C) and thermophilic culture (at 48 degrees C) was investigated using synchrotron radiation-based X-ray diffraction (SR-XRD) and S K-edge and Fe L-edge X-ray absorption near edge structure (XANES) spectroscopy. Bioleaching experiments showed that copper extraction from chalcopyrite bioleaching by both cultures was promoted significantly by Ag+, with more serious corrosion occurring on the minerals surface. SR-XRD and XANES analyses showed that the intermediates S-0, jarosite and secondary minerals (bornite, chalcocite and covellite) formed for all bioleaching experiments. For these secondary minerals, the formation of bornite and covellite was promoted significantly in the presence of Ag+ for both cultures, while Ag+ has almost no effect on the formation of chalcocite. These results provided insight into the catalytic mechanisms of Ag+ to chalcopyrite bioleaching by the mesophilic and thermophilic cultures, which are both probably due to the rapid formation of bornite by Ag+ and the conversion of bornite to covellite. |
| WOS关键词 | ELECTROCHEMICAL DISSOLUTION ; SILVER IONS ; SPECIATION ; SPECTROSCOPY ; EVOLUTION ; OXIDATION ; MINERALS ; EMPHASIS ; KINETICS ; BORNITE |
| WOS研究方向 | Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000447939100022 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286723]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zheng L,Ma CY,Zhao YD,et al. Synchrotron Radiation Based Study of the Catalytic Mechanism of Ag+ to Chalcopyrite Bioleaching by Mesophilic and Thermophilic Cultures[J]. MINERALS,2018,8(9):382. |
| APA | 郑雷,马陈燕,赵屹东,Nie, Zhenyuan, Zhang, Weiwei, Liu, Hongchang, Xia, Jinlan, Zhu, Wei, Zhang, Duorui, Zheng, Lei, Ma, Chenyan, Zhao, Yidong,&Wen, Wen.(2018).Synchrotron Radiation Based Study of the Catalytic Mechanism of Ag+ to Chalcopyrite Bioleaching by Mesophilic and Thermophilic Cultures.MINERALS,8(9),382. |
| MLA | 郑雷,et al."Synchrotron Radiation Based Study of the Catalytic Mechanism of Ag+ to Chalcopyrite Bioleaching by Mesophilic and Thermophilic Cultures".MINERALS 8.9(2018):382. |
入库方式： OAI收割
来源：高能物理研究所
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