Linking leach chemistry and microbiology of low-grade copper ore bioleaching at different temperatures
Jia, Yan1,2; Sun, He-yun1,2; Tan, Qiao-yi1,2; Gao, Hong-shan3; Feng, Xing-liang3; Ruan, Ren-man1,2
2018-03-01
发表期刊INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN1674-4799
卷号25期号:3页码:271-279
摘要The effects of temperature on chalcocite/pyrite oxidation and the microbial population in the bioleaching columns of a low-grade chalcocite ore were investigated in this study. Raffinate from the industrial bioleaching heap was used as an irrigation solution for columns operated at 20, 30, 45, and 60A degrees C. The dissolution of copper and iron were investigated during the bioleaching processes, and the microbial community was revealed by using a high-throughput sequencing method. The genera of Ferroplasma, Acidithiobacillus, Leptospirillum, Acidiplasma, and Sulfobacillus dominated the microbial community, and the column at a higher temperature favored the growth of moderate thermophiles. Even though microbial abundance and activity were highest at 30A degrees C, the column at a higher temperature achieved a much higher Cu leaching efficiency and recovery, which suggested that the promotion of chemical oxidation by elevated temperature dominated the dissolution of Cu. The highest pyrite oxidation percentage was detected at 45A degrees C. Higher temperature resulted in precipitation of jarosite in columns, especially at 60A degrees C. The results gave implications to the optimization of heap bioleaching of secondary copper sulfide in both enhanced chalcocite leaching and acid/iron balance, from the perspective of leaching temperature and affected microbial community and activity.
文章类型Article
WOS标题词Science & Technology ; Technology ; Physical Sciences
DOI10.1007/s12613-018-1570-2
收录类别SCI
语种英语
关键词[WOS]ACID-MINE DRAINAGE ; SP-NOV. ; SULFIDE ; PYRITE ; ACIDOPHILES ; OXIDATION ; BACTERIA ; IRON ; PH ; BIOOXIDATION
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
WOS类目Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
项目资助者National Natural Science Foundation of China(41401541 ; Bureau of International Co-operation, Chinese Academy of Sciences(122111KYSB20150013) ; 51674231 ; 51474075)
WOS记录号WOS:000426597200003
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24033
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Wanbao Min Ltd, Beijing 100053, Peoples R China
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Jia, Yan,Sun, He-yun,Tan, Qiao-yi,et al. Linking leach chemistry and microbiology of low-grade copper ore bioleaching at different temperatures[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2018,25(3):271-279.
APA Jia, Yan,Sun, He-yun,Tan, Qiao-yi,Gao, Hong-shan,Feng, Xing-liang,&Ruan, Ren-man.(2018).Linking leach chemistry and microbiology of low-grade copper ore bioleaching at different temperatures.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,25(3),271-279.
MLA Jia, Yan,et al."Linking leach chemistry and microbiology of low-grade copper ore bioleaching at different temperatures".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 25.3(2018):271-279.
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