Bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans
文献类型：期刊论文
| 作者 | Shi, SY; Fang, ZH |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 75期号:1-4页码:1-10 |
| 关键词 | marmatite Acidithiobacillus ferrooxidans bioleaching residues mineralogical analysis |
| ISSN号 | 0304-386X |
| 其他题名 | Hydrometallurgy |
| 中文摘要 | Bioleaching of a marmatite flotation concentrate by Acidithiobacillus ferrooxidans was carried out at 35 degreesC and an initial pH of 2.0 on an orbital shaker at 160 min(-1). Experimental results indicated that the adapted strains markedly increased the dissolution rate of marmatite when compared with the sterile control and the original strains. The fact that Fe3+ ions played a key role in the dissolution of marmatite was demonstrated by the chemical leaching of the concentrate with different concentrations of Fe3+ ions. The main role of the microorganisms was to oxidize Fe2+ ions into Fe3+ ions during the bioleaching process. S.E.M. observations showed the morphological features of the mineral sample and leach residues. The cross-section image of residue particles revealed two different regions, a periphery consisting of reaction products and an undissolved core. It was shown by X-ray diffraction and EDX analysis that the leach residues were composed of elemental sulfur, precipitate of jarosite and undissolved mineral impurities. These facts suggested that the elemental sulfur formed was not completely oxidized and dissolved only partially in the marmatite bioleaching even in the presence of bacterial strains. The sulfur product coated the residue particles and negatively affected the dissolution of marmatite. The marmatite was dissolved preferentially during the bioleaching process by Acidithiobacillus ferrooxidans, as compared with other sulfide minerals such as pyrite and galena in the concentrate. (C) 2004 Elsevier B.V. All rights reserved. |
| 英文摘要 | Bioleaching of a marmatite flotation concentrate by Acidithiobacillus ferrooxidans was carried out at 35 degreesC and an initial pH of 2.0 on an orbital shaker at 160 min(-1). Experimental results indicated that the adapted strains markedly increased the dissolution rate of marmatite when compared with the sterile control and the original strains. The fact that Fe3+ ions played a key role in the dissolution of marmatite was demonstrated by the chemical leaching of the concentrate with different concentrations of Fe3+ ions. The main role of the microorganisms was to oxidize Fe2+ ions into Fe3+ ions during the bioleaching process. |
| 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] | THIOBACILLUS-FERROOXIDANS ; ZINC-SULFIDE ; BACTERIAL OXIDATION ; FERROUS SULFATE ; MECHANISM ; IONS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000225180100001 |
| 公开日期 | 2013-11-05 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4901]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, SY,Fang, ZH. Bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans[J]. HYDROMETALLURGY,2004,75(1-4):1-10. |
| APA | Shi, SY,&Fang, ZH.(2004).Bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans.HYDROMETALLURGY,75(1-4),1-10. |
| MLA | Shi, SY,et al."Bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans".HYDROMETALLURGY 75.1-4(2004):1-10. |
入库方式： OAI收割
来源：过程工程研究所
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