Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH
文献类型：期刊论文
| 作者 | Ma CY(马陈燕) ; Hong CH(洪才浩); Zheng L(郑雷); Wen, W; Zhao, YD; Hong, CH; Liu, HC; Zheng, L; Ma, CY; Nie, ZY
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| 刊名 | MINERALS ENGINEERING
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| 出版日期 | 2016 |
| 卷号 | 98页码:80-89 |
| 关键词 | Bioleaching Chalcopyrite Acidianus manzaensis Constant pH Synchrotron radiation XANES |
| DOI | 10.1016/j.mineng.2016.07.019 |
| 英文摘要 | The bioleaching of pure chalcopyrite by thermophilic Archaea strain Acidianus manzaensis YN-25 under different constant pH was first comparatively investigated. Then the relevant sulfur speciation was analyzed by synchrotron radiation based X-ray diffraction (SR-XRD) and S K-edge X-ray absorption near edge structure ()CANES) spectroscopy. The acidity of the leaching solution was monitored at 3-h intervals to make it steady at pH 1.25, 1.50, 1.75, 2.00, 2.25 and 2.50, respectively. Leaching results showed that the copper ion extraction increased during chemical leaching but decreased during bioleaching when pH value decreased from 2.50 to 1.25. SR-XRD analysis showed that, during bioleaching, new elemental sulfur (5) phase was detected at all tested pH cases; new jarosite phase was detected at cases of pH 1.50 to 2.50; and jarosite gradually became a major phase when pH value increased. XANES analysis further showed that covellite was detected during bioleaching at cases of pH 1.25 to 2.00 at higher redox potential (ORP) value, while chalcocite and bornite were detected at cases of pH 2.25 and 2.50 at lower ORP value. These results suggested that the formation of S was mainly accounting for hindering the dissolution of chalcopyrite while the formation of bornite could accelerate the dissolution of chalcopyrite by A. manzaensis. (C) 2016 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000385603200011 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260310]  |
| 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 | Ma CY,Hong CH,Zheng L,et al. Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH[J]. MINERALS ENGINEERING,2016,98:80-89. |
| APA | 马陈燕.,洪才浩.,郑雷.,Wen, W.,Zhao, YD.,...&赵屹东.(2016).Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH.MINERALS ENGINEERING,98,80-89. |
| MLA | 马陈燕,et al."Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH".MINERALS ENGINEERING 98(2016):80-89. |
入库方式： OAI收割
来源：高能物理研究所
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