Pyrite oxidation in column at controlled redox potential of 900 mV with and without bacteria
文献类型：期刊论文
| 作者 | Sun, He-Yun1,2,3; Tan, Qiao-Yi1,2,3; Jia, Yan1,2,3; Shu, Rong-Bo4; Zhong, Shui-Ping5; Ruan, Ren-Man1,2,3 |
| 刊名 | RARE METALS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 41期号:12页码:4279-4288 |
| 关键词 | Pyrite column leaching Temperature Controlled redox potential Bacteria |
| ISSN号 | 1001-0521 |
| DOI | 10.1007/s12598-016-0844-y |
| 英文摘要 | Comparisons on the bioleaching and sterile oxidation of pyrite were performed at controlled redox potential of 900 mV (vs. SHE) and different temperatures of 30 and 60 degrees C. For sterile experiments, the redox potential of irrigation solution was controlled by adding hydrogen peroxide solution (15 wt%), while the redox potential of irrigation solution for bioleaching was elevated by flowing through the packed bed in which bacteria were activated and colonized. The rate of pyrite bioleaching is faster than that of sterile oxidation at temperature of 30 degrees C. The reason is that the potential gradient of leaching solution in bioleaching column is much smaller than that in sterile column. The redox potentials of irrigation solution and leaching solution are similar for bioleaching; however, the redox potential difference of irrigation solution and leaching solution for sterile oxidation is about 150 mV. When temperature increases to 60 degrees C for sterile oxidation, the rate of pyrite leaching is faster than that of bioleaching at temperature of 30 degrees C, even though the redox potential gradient of leaching solution is great. The mineralogy analyses of pyrite residue were performed by scanning electron microscopy-energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. The results confirm that pyrite oxidation might only occur at specific sites with high surface energy on surface and obeys the "indirect mechanism" whether there are bacteria or not. The pyrite oxidation rate is not inhibited by inert sulfur on residue surface at elevated redox potential. According to the conclusions, the way to accelerate pyrite oxidation is proposed. |
| WOS关键词 | THIOBACILLUS-FERROOXIDANS ; LEACHING KINETICS ; DISSOLVED-OXYGEN ; SULFATE-IONS ; FERRIC IONS ; TEMPERATURE ; CONCENTRATE ; SULFUR ; IRON ; DISSOLUTION |
| 资助项目 | Research Fund for Program of Efficient Gold Extraction from Refractory Gold Ore of Sichuan Province, China[12120113088100] ; National Natural Science Foundation of China[41401541] ; National Natural Science Foundation of China[51474075] ; Bureau of International Co-operation, Chinese Academy of Sciences[122111KYSB20150013] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000879824700037 |
| 出版者 | NONFERROUS METALS SOC CHINA |
| 资助机构 | Research Fund for Program of Efficient Gold Extraction from Refractory Gold Ore of Sichuan Province, China ; National Natural Science Foundation of China ; Bureau of International Co-operation, Chinese Academy of Sciences |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/55535]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Ruan, Ren-Man |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 4.Chinese Acad Geol Sci, Inst Multipurpose Utilizat Mineral Resources, Chengdu 610041, Peoples R China 5.Zijin Min Grp Co Ltd, State Key Lab Gold Extract, Shanghang 364200, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, He-Yun,Tan, Qiao-Yi,Jia, Yan,et al. Pyrite oxidation in column at controlled redox potential of 900 mV with and without bacteria[J]. RARE METALS,2022,41(12):4279-4288. |
| APA | Sun, He-Yun,Tan, Qiao-Yi,Jia, Yan,Shu, Rong-Bo,Zhong, Shui-Ping,&Ruan, Ren-Man.(2022).Pyrite oxidation in column at controlled redox potential of 900 mV with and without bacteria.RARE METALS,41(12),4279-4288. |
| MLA | Sun, He-Yun,et al."Pyrite oxidation in column at controlled redox potential of 900 mV with and without bacteria".RARE METALS 41.12(2022):4279-4288. |
入库方式： OAI收割
来源：过程工程研究所
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