| Electrochemical behavior of chalcopyrite in presence of Thiobacillus ferrooxidans |
| |
| 作者单位： | School of Metallurgy and Ecology Engineering University of Science and TechnologyBeijing，Key Laboratoryof Ecological and Recycling Metallurgy，Ministry of Education，Beijing 100083，China，School of Resources Processing and Bioengineering，Central South University，School of Resources Processing and Bioengineering，Central South University，School of Metallurgy and Ecology Engineering，University of Science and TechnologyBeijing，Key Laboratoryof Ecological and Recycling Metallurgy，Ministry of Education，Beijing 100083，China，School of Resources Processing and Bioengineering，Central South University，Beijing 100083，China，Changsha 410083，China，Changsha 410083，China，Beijing 100083，China，Changsha 410083，China |
| |
| 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 |
| |
| 摘 要： | 1 Introduction The bioleaching research has a great progress in metallurgy industry. A significant number of commercial applications have emerged and are able to compete with conventional processing, especially the application for the copper recovery. Fur…
|
| 关 键 词： | 生物浸取 阳极氧化 细菌冶金 粉末微电极 黄铜矿 动力学 |
| 收稿时间： | 2005-12-23 |
| 修稿时间： | 2006-04-17 |
Electrochemical behavior of chalcopyrite in presence of Thiobacillus ferrooxidans |
| |
| LI Hong-xu,QIU Guan-zhou,HU Yue-hua,CANG Da-qiang,WANG Dian-zuo. Electrochemical behavior of chalcopyrite in presence of Thiobacillus ferrooxidans[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(5): 1240-1244,F0003. DOI: 10.1016/S1003-6326(06)60408-1 |
| |
| Authors: | LI Hong-xu QIU Guan-zhou HU Yue-hua CANG Da-qiang WANG Dian-zuo |
| |
| Affiliation: | 1. School of Pharmacy, Lanzhou University, Donggang West Road No. 199, Lanzhou 730020, PR China;2. College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, PR China;3. Gansu Institute of Business and Technology, Yannan Road No. 449, Lanzhou 730010, PR China;1. College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Xinfeng Road No. 5, Daqing 163319, PR China;2. School of Pharmacy, Lanzhou University, Tianshui Road No. 222, Lanzhou 730000, PR China;1. Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Gansu 730000, PR China;2. School of Pharmaceutical, Lanzhou University, Gansu 730000, PR China;3. Department of Biological Sciences, Karakoram International University Gilgit, Pakistan;4. Gansu Corps Hospital of CAPF, Gansu 730000, PR China;5. Guangdong Corps Hospital of CAPF, Guangdong 510507, PR China |
| |
| Abstract: | The chalcopyrite anode dissolution behavior in the presence or absence of bacteria in 9 K media using bacteria modified powder microelectrode at 30 °C was studied. It is found that during the anode dissolution, many intermediate transient reactions occur accompanying with the production of chalcocite and covellite at potential between −0.075 V and −0.025 V (vs SCE). At low scanning potential between −0.1 and −0.250 V, the iron ion is released in ferrous form, but at the relative high potential up to 0.7 V, it is the ferric one. The presence of Thiobacillus ferrooxidans makes peak current increase and the initial peak potential negatively move, hinting the decomposed oxidation reaction easily occurred and especially the iron ion released and ferrous oxidation reaction enhanced. The characteristic at potential between −0.75 and −0.5 V demonstrates the Thiobacillus ferrooxidans also contributes to the element sulfur formed on the oxidation surface and removed during anode process. The added ferric in the cell could enhance the dissolution reaction, while the increased acid under pH=2 might slightly hamper the process. The anode dissolution kinetics studies show that the presence of bacteria could decease corrosion potential from 0.238 V to 0.184 V and increase the corrosion current density from 1.632 14×10−8 A/cm2 to 2.374 11×10−7A/cm2. |
| |
| Keywords: | biohydrometallurgy bioleaching anode oxidation bacteria modification powder microelectrode chalcopyrite kinetics |
| 本文献已被 CNKI 万方数据 ScienceDirect 等数据库收录！ |
|
