Column bioleaching of low grade copper sulfide ore at extreme conditions for most mineral processing bacteria
文献类型：会议论文
| 作者 | Zou, Gang2,3; Wu, Zeng Ling2; Lai, Xiao Kang2; Zou, Lai Chang2; Ruan, Ren Man1; Papirio, Stefano3; Jaakko, Puhakka3 |
| 出版日期 | 1905-07-05 |
| 会议日期 | October 8, 2013 - October 11, 2013 |
| 会议地点 | Antofagasta, Chile |
| 关键词 | Bacteria - Iron - Assays - Efficiency - Extraction - Polymerase chain reaction - Sulfur compounds - Ores - Copper compounds - Copper mines |
| 卷号 | 825 |
| DOI | 10.4028/www.scientific.net/AMR.825.318 |
| 页码 | 318-321 |
| 英文摘要 | This study is prompted by the high leaching efficiency of Zijinshan copper bio-heap leaching industrial plant. Bioleaching columns with 100 mm diameter and 1 m height were used to investigate copper bioleaching at different operating conditions. Elevated temperature, high total Fe concentration and high acidity significantly increased copper leaching rate as determined by and residue assays. At 60 掳C with 50 g/L iron (initial Fe3+/Fe2+ ratio 2.5), pH 1.0 and no aeration, of copper extraction by residue assay was achieved after 60 days. However, at 30掳C, 5 g/L total Fe, pH 1.5 and no aeration, copper extraction reached 80% and 85% after 90 and 200 days, Real-time PCR assay showed that only 105 cells/ml and 2脳105 cells/g are in solution and on the ore surface at the condition of 60 掳C, 50 g/L iron and pH 1.0, respectively. In addition, a similar rate was observed in the tests with and without inoculation. Two columns were irrigated with acid mine drainage (AMD) with and without inoculation, respectively. Our results indicate high copper leaching efficiency at extreme conditions for mineral oxidizing bacteria. Inoculation and aeration not necessary in Zijinshan copper mine bio-heap leaching process. 漏 (2013) Trans Tech Publications, Switzerland. |
| 资助机构 | Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland |
| 会议录 | 20th International Biohydrometallurgy Symposium, IBS 2013
 |
| 学科主题 | Bioleaching |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59418]  |
| 作者单位 | 1.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2.Zijin Mining Group Co., Ltd, Shanghang 364200, China 3.Department of Chemistry and Bioengineering, Tampere University of Technology, PO Box 541, FI-33101 Tampere, Finland |
| 推荐引用方式 GB/T 7714 | Zou, Gang,Wu, Zeng Ling,Lai, Xiao Kang,et al. Column bioleaching of low grade copper sulfide ore at extreme conditions for most mineral processing bacteria[C]. 见:. Antofagasta, Chile. October 8, 2013 - October 11, 2013. |
入库方式： OAI收割
来源：过程工程研究所
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