| Electro-generative mechanism for simultaneous leaching of pyrite and MnO2 in presence of A. ferrooxidans |
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| 作者姓名： | 肖利 方正 邱冠周 柳建设 |
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| 作者单位： | [1]School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China [2]School of Resources Processing and Bioengineering, Central South University, Changsha 410083,China; [3]Hunan Metallurgic Professional Technical College, Zhuzhou 412000, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | A dual cell system was used to study the output power, output voltage, galvanic polarization of anode and cathode, and the relationship between the electric quantity（Q） and some factors, such as the dissolved Fe2＋ magnitude, the time in the electro- generative simultaneous leaching with bacteria（BEGSL） and without bacteria（EGSL）. A three-electrode system was adopted to study their individual self-corrosion current, which was smaller compared with the galvanic current. The results show that the output power and voltage in BEGSL are higher than those in EGSL. The accumulated sulfur on the surface of sulfides produced in BEGSL can be oxidized by A. ferrooxidans, and the ratio of biologic electric quantity reaches 51.50% in 72 h. The first stage both in EGSL and in BEGSL is the dissolution of pyrite on the surface to ferrous ion and sulfur element, which was oxidized by A. ferrooxidans in the further procedure.
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| 关 键 词： | 黄铁矿 二氧化锰 生物氧化 偏振 |
| 收稿时间： | 15 July 2007 |
| 修稿时间： | 2007-07-15 |
Electro-generative mechanism for simultaneous leaching of pyrite and MnO2 in presence of A. ferrooxidans |
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| Li XIAO, Zheng FANG, Guan-zhou QIU,Jian-she LIU.Electro-generative mechanism for simultaneous leaching of pyrite and MnO2 in presence of A. ferrooxidans[J].Transactions of Nonferrous Metals Society of China,2007,17(6):1373-1378. |
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| Authors: | Li XIAO Zheng FANG Guan-zhou QIU Jian-she LIU |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. School of Resources Processing and Bioengineering, Central South University, Changsha 410083,China; 3. Hunan Metallurgic Professional Technical College, Zhuzhou 412000, China |
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| Abstract: | A dual cell system was used to study the output power, output voltage, galvanic polarization of anode and cathode, and the relationship between the electric quantity(Q) and some factors, such as the dissolved Fe2 magnitude, the time in the electrogenerative simultaneous leaching with bacteria(BEGSL) and without bacteria(EGSL). A three-electrode system was adopted to study their individual self-corrosion current, which was smaller compared with the galvanic current. The results show that the output power and voltage in BEGSL are higher than those in EGSL. The accumulated sulfur on the surface of sulfides produced in BEGSL can be oxidized by A. ferrooxidans, and the ratio of biologic electric quantity reaches 51.50% in 72 h. The first stage both in EGSL and in BEGSL is the dissolution of pyrite on the surface to ferrous ion and sulfur element, which was oxidized by A. ferrooxidans in the further procedure. |
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| Keywords: | pyrite MnO2 bio-oxidation simultaneous leaching electro-generation |
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