Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers
文献类型：期刊论文
| 作者 | Long, ZE; Huang, YH; Cai, ZL; Wei, C; Fan, OY |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2004-10-01 |
| 卷号 | 74期号:3-4页码:181-187 |
| 关键词 | Acidithiobacillus ferrooxidans bio-oxidation of ferrous ion immobilization packed-bed bioreactor poly(vinyl alcohol) cryogel |
| ISSN号 | 0304-386X |
| 其他题名 | Hydrometallurgy |
| 中文摘要 | Bio-oxidation of ferrous ion by immobilized Acidithiobacillus ferrooxidans is potentially useful in the new technology of two-step bioleaching. The kinetics of continuous oxidation of ferrous ion by PVA-cryogel-immobilized A. ferrooxidans was investigated in a 365-ml packed-bed bioreactor. The effects of ferrous ion concentration and operating dilution rate of the bioreactor on the kinetics of ferrous ion oxidation were examined. Media containing 1-11.5 g/L ferrous ion were tested. For each medium, the kinetics of reaction at different dilution rate, at a constant temperature of 31degreesC, were determined. For a medium containing 3.8 g/L or less ferrous ion, the oxidation rate was proportional to the dilution rate of the bioreactor, and the highest oxidation rate of 2.3 g/L h was achieved at the dilution rate of 0.76 l/h with a medium containing 3.8 g/L ferrous iron. In contrast, for a medium containing more ferrous ion, the kinetic performance of the bioreactor showed a plateau region that was independent of volumetric loading or even exhibited a decrease at high dilution rate. Under these circumstances, the increase of concentration of ferrous ion led to a lower dilution rate, at which the maximum oxidation rate was achieved, and a lower maximum oxidation rate. The results indicated an inhibitory effect of high ferrous ion concentration on the activity of immobilized A. ferrooxidans. (C) 2004 Elsevier B.V. All rights reserved. |
| 英文摘要 | Bio-oxidation of ferrous ion by immobilized Acidithiobacillus ferrooxidans is potentially useful in the new technology of two-step bioleaching. The kinetics of continuous oxidation of ferrous ion by PVA-cryogel-immobilized A. ferrooxidans was investigated in a 365-ml packed-bed bioreactor. The effects of ferrous ion concentration and operating dilution rate of the bioreactor on the kinetics of ferrous ion oxidation were examined. Media containing 1-11.5 g/L ferrous ion were tested. For each medium, the kinetics of reaction at different dilution rate, at a constant temperature of 31degreesC, were determined. For a medium containing 3.8 g/L or less ferrous ion, the oxidation rate was proportional to the dilution rate of the bioreactor, and the highest oxidation rate of 2.3 g/L h was achieved at the dilution rate of 0.76 l/h with a medium containing 3.8 g/L ferrous iron. In contrast, for a medium containing more ferrous ion, the kinetic performance of the bioreactor showed a plateau region that was independent of volumetric loading or even exhibited a decrease at high dilution rate. Under these circumstances, the increase of concentration of ferrous ion led to a lower dilution rate, at which the maximum oxidation rate was achieved, and a lower maximum oxidation rate. The results indicated an inhibitory effect of high ferrous ion concentration on the activity of immobilized A. ferrooxidans. (C) 2004 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | PACKED-BED REACTORS ; THIOBACILLUS-FERROOXIDANS ; SULFATE OXIDATION ; IRON OXIDATION ; FERRIC IRON ; BIOOXIDATION ; CELLS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000224564200001 |
| 公开日期 | 2013-11-05 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4958]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100080, Peoples R China 2.Jiangxi Normal Univ, Coll Life Sci, Nanchang 330027, Peoples R China |
| 推荐引用方式 GB/T 7714 | Long, ZE,Huang, YH,Cai, ZL,et al. Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers[J]. HYDROMETALLURGY,2004,74(3-4):181-187. |
| APA | Long, ZE,Huang, YH,Cai, ZL,Wei, C,&Fan, OY.(2004).Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers.HYDROMETALLURGY,74(3-4),181-187. |
| MLA | Long, ZE,et al."Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers".HYDROMETALLURGY 74.3-4(2004):181-187. |
入库方式： OAI收割
来源：过程工程研究所
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