| Galvanic interaction between galena and pyrite in an open system |
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| 作者姓名： | 周丽 李和平 徐丽萍 |
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| 作者单位： | Laboratory of Materials of the Earth’s Interior Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China，Graduate School Chinese Academy of Sciences Beijing 100039 China，Laboratory of Materials of the Earth’s Interior Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China，Laboratory of Materials of the Earth’s Interior Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China，Graduate School Chinese Academy of Sciences Beijing 100039 China |
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| 基金项目： | This research was funded by the Science Innovation Program of the Chinese Academy of Sciences （Grant No. KZCX3-SW-124）. |
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| 摘 要： | 1IntroductionMost sulfide minerals in nature have perfect con-ductivity and possess semiconducting properties.Gal-vanic corrosion may occur when two sulfide mineralswith different potentials are connected together in thesolution.The mineral with the highe…
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| 关 键 词： | 黄铁矿 方铅矿 流电 酸性矿山 |
| 收稿时间： | 14 March 2006 |
Galvanic interaction between galena and pyrite in an open system |
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| Zhou Li,Li Heping,Xu Liping.Galvanic interaction between galena and pyrite in an open system[J].Chinese Journal of Geochemistry,2006,25(3):230-237. |
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| Authors: | Zhou Li Li Heping Xu Liping |
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| Institution: | (1) Laboratory of Materials of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Graduate School, Chinese Academy of Sciences, 100039 Beijing, China |
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| Abstract: | Galvanic interactions between sulfide minerals have very important influences on hydrometallurgical processes, the supergene enrichment of sulfides and the formation of acid mine drainage. By changing the concentrations of Fe {3 }, the pH values, status of the flowing of the solution and the solution salinity (e.g. the concentrations of Na-2SO-4) and monitoring the galvanic currents and potentials, studies were conducted in this work on the galvanic interaction between pyrite acting as the anode and galena acting as the cathode. The results indicated that the concentrations of Fe {3 }, pH values and the flowing of the solution exhibit a great effect on the galvanic interaction of galena-pyrite couple, while the salinity of the solution has only a slight influence on the interaction. The experiments also revealed that in case cracks exist on the surface of pyrite electrode, the potential of pyrite will decrease so sharply as to be lower than that of galena under the same experimental condition. The experimental results were explained in terms of the Butler-Volume equation and the theory of mixed potential. |
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| Keywords: | pyrite galena galvanic interaction acid mine drainage flowing medium |
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