Characterization of microbial community in industrial bioleaching heap of copper sulfide ore at Monywa mine, Myanmar
Jia, Yan1,2; Sun, Heyun1,2; Chen, Defang3; Gao, Hongshan3; Ruan, Renman1,2
2016-09-01
发表期刊HYDROMETALLURGY
ISSN0304-386X
卷号164期号:SEP页码:355-361
摘要

Microbial communities and activities in multi-lift bioleaching heap of copper sulfide ore were investigated at Monywa copper mine, Myanmar. The high-throughput sequencing method revealed a microbial community dominated by archaeal Ferroplasma (about 70%), rather than more commonly reported genera of Acidithiobacillus and Leptospirillum (together about 25% in Monywa heap). Multi-lift stacking operation without heap aeration resulted in low oxygen concentrations in the heaps (leachate oxygen concentration of 0.35 mg L-1 to 0.68 mg L-1). Therefore, low oxygen concentrations, high organic matter concentrations and moderate temperature in the heaps favored the growth of versatile Ferroplasma which can both undergo autotrophic and heterotrophic growth. Total cell number in the irrigation solution and leachate was in the range of 4.86-8.80 x 106 mL(-1), and the detected microbes in ore residues and leaching solutions were mainly those with iron-oxidizing ability. Their iron-oxidizing rate showed highest at the temperature of 35 degrees C, while in heaps may be limited by the low oxygen supply. Monywa bioleaching system with the above mentioned microbial community and activity formed a leaching solution of low redox potential, resulting in appropriate pyrite oxidation during chalcocite dissolution, thus helped maintain relatively stable acid and iron concentration in the cycling leaching solution. This study explained the formation of the microbial community and activity in Monywa heap leaching, linking to its heap physical and chemical conditions, and suggested that the role of Ferroplasma in bioleaching system may have been overlooked previously, especially in oxygen-limited bioleaching heaps. (C) 2016 Elsevier B.V. All rights reserved.

关键词Copper Sulfide Ferroplasma High-throughput Sequencing Microbial Community Multi-lift Heap Bioleaching
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.hydromet.2016.07.007
收录类别SCI
语种英语
关键词[WOS]PYRITE OXIDATION ; DISSOLVED-OXYGEN ; FERROUS IRON ; LOW PH ; MICROORGANISMS ; DRAINAGE ; BACTERIA ; TEMPERATURE ; DIVERSITY ; CHEMISTRY
WOS研究方向Metallurgy & Metallurgical Engineering
WOS类目Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China(41401541) ; Youth Foundation of Key Laboratory of Green Process and Engineering, Chinese Academy of Sciences ; Bureau of International Co-operation, Chinese Academy of Sciences(122111KYSB20150013)
WOS记录号WOS:000381949900044
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21308
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, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
3.Wanbao Min Ltd, Beijing 10053, Peoples R China
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Jia, Yan,Sun, Heyun,Chen, Defang,et al. Characterization of microbial community in industrial bioleaching heap of copper sulfide ore at Monywa mine, Myanmar[J]. HYDROMETALLURGY,2016,164(SEP):355-361.
APA Jia, Yan,Sun, Heyun,Chen, Defang,Gao, Hongshan,&Ruan, Renman.(2016).Characterization of microbial community in industrial bioleaching heap of copper sulfide ore at Monywa mine, Myanmar.HYDROMETALLURGY,164(SEP),355-361.
MLA Jia, Yan,et al."Characterization of microbial community in industrial bioleaching heap of copper sulfide ore at Monywa mine, Myanmar".HYDROMETALLURGY 164.SEP(2016):355-361.
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