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| 嗜酸氧化亚铁硫杆菌浸出黄铜矿中氧化还原电位、黄铁钾钒和胞外聚合物的关系和影响(英文) | |
| 引用本文： | 余润兰,钟代立,苗雷,吴发登,邱冠周,顾国华. 嗜酸氧化亚铁硫杆菌浸出黄铜矿中氧化还原电位、黄铁钾钒和胞外聚合物的关系和影响(英文)[J]. 中国有色金属学会会刊, 2011, 0(7): 1634-1640 |
| 作者姓名： | 余润兰 钟代立 苗雷 吴发登 邱冠周 顾国华 |
| 作者单位： | 中南大学资源加工与生物工程学院;中南大学生物冶金教育部重点实验室; |
| 基金项目： | Project(2010CB630904) supported by the National Basic Research Program of China; Project(50621063) supported by the Chinese Science Foundation for Distinguished Group |
| 摘 要： | 在合成的胞外聚合物(EPS)溶液中,研究不同起始总铁量、不同Fe(III)与Fe(II)摩尔比条件下嗜酸氧化亚铁硫杆菌浸出黄铜矿过程中pH、电位、可溶性铁离子和Cu2+浓度随浸出时间的变化。结果表明:当溶液电位低于650mV(vsSHE)时,因细菌产生的EPS可通过絮凝黄铁钾钒延缓污染,即使铁离子浓度达到20g/L,黄铁钾钒对细菌浸出黄铜矿的阻碍作用也不是致命的,但随着铁离子浓度的增加而增加;细菌氧化的铁离子容易吸附在黄铜矿表面的EPS表层,有黄铁钾钒的EPS层是弱离子扩散壁垒,细菌通过把EPS空间内外的Fe2+氧化成Fe3+,进一步创造高于650mV的电位,导致EPS层离子扩散性能的快速恶化,严重地和不可逆地阻碍生物浸出黄铜矿。 |
| 关 键 词： | 胞外聚合物 黄铜矿 生物浸出 黄铁钾钒 氧化还原电位 |
Relationship and effect of redox potential,jarosites and extracellular polymeric substances in bioleaching chalcopyrite by acidithiobacillus ferrooxidans |
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| YU Run-lan,,ZHONG Dai-li,MIAO Lei,WU Fa-deng,QIU Guan-zhou,GU Guo-hua, .School of Minerals Processing , Bioengineering,Central South University,Changsha ,China,.Key Laboratory of Biometallurgy of Ministry of Education. Relationship and effect of redox potential,jarosites and extracellular polymeric substances in bioleaching chalcopyrite by acidithiobacillus ferrooxidans[J]. Transactions of Nonferrous Metals Society of China, 2011, 0(7): 1634-1640 | |
| Authors: | YU Run-lan ZHONG Dai-li MIAO Lei WU Fa-deng QIU Guan-zhou GU Guo-hua .School of Minerals Processing Bioengineering Central South University Changsha China .Key Laboratory of Biometallurgy of Ministry of Education |
| Affiliation: | YU Run-lan1,2,ZHONG Dai-li1,MIAO Lei1,WU Fa-deng1,QIU Guan-zhou1,GU Guo-hua1,2 1.School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China,2.Key Laboratory of Biometallurgy of Ministry of Education |
| Abstract: | The changes of pH,redox potential,concentrations of soluble iron ions and Cu2+ with the time of bioleaching chalcopyrite concentrates by acidithiobacillus ferrooxidans were investigated under the different conditions of initial total-iron amount as well as mole ratio of Fe(III) to Fe(II) in the solutions containing synthetic extracellular polymeric substances (EPS).When the solution potential is lower than 650 mV (vs SHE),the inhibition of jarosites to bioleaching chalcopyrite is not vital as EPS produced b... |
| Keywords: | extracellular polymeric substances chalcopyrite bioleaching jarosites redox potential |
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