NDLI: Effect of CO$_{2}$ and N$_{2}$ on microbial community changes during column bioleaching of low-grade high pyrite-bearing chalcocite ore

Content Provider	Springer Nature Link
Author	Chen, Bo wei Wu, Biao Liu, Xing yu Wen, Jian kang
Copyright Year	2015
Abstract	Simulated heap bioleaching of low-grade high pyrite-bearing chalcocite ore was conducted at 40°C with aeration of CO$_{2}$ and N$_{2}$. Ore samples were collected at day 43, 64, 85, 106 and subjected to microbial community analysis by 16S rRNA gene clone library. Phylogenetic analyses of 16S rDNA fragments revealed that the retrieved sequences are mainly related to genus Acidithiobacillus, Leptospirillum and Sulfobacillus. Aeration of CO$_{2}$ and N$_{2}$ significantly impacted the microbial community composition. When CO$_{2}$ was aerated, the proportion of genus Acidithiobacillus considerably increased, whereas the proportion of genus Leptospirillum and genus Sulfobacillus declined. However, with the aeration of N$_{2}$, the proportion of genus Acidithiobacillus and Leptospirillum increased, but genus Sulfobacillus decreased. When there was no aeration, the microbial community was similar to the inocula with the proportion of genus Leptospirillum mounted. These results indicated that the limitation of oxygen could change the bioleaching microbial community and the aeration of CO$_{2}$ and N$_{2}$ was favourable for the growth of sulfur-oxidizer (At. caldus) and iron-oxidizer (L. ferriphilum) respectively, which could be used for the regulation of microorganisms’ role in mineral bioleaching.
Starting Page	4528
Ending Page	4535
Page Count	8
File Format	PDF
ISSN	20952899
Journal	Journal of Central South University of Technology
Volume Number	22
Issue Number	12
e-ISSN	22275223
Language	English
Publisher	Central South University
Publisher Date	2015-12-16
Publisher Place	Changsha
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bioleaching CO$_{2}$ N$_{2}$ chalcocite pyrite microbial community Engineering Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Engineering

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