CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Limited role of sessile acidophiles in pyrite oxidation below redox potential of 650 mV
Liu, Chang1,3; Jia, Yan1,2; Sun, Heyun1,2; Tan, Qiaoyi1,2; Niu, Xiaopeng1,2; Leng, Xuekun4; Ruan, Renman1,2
2017-07-10
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume7
Abstract

Pyrite oxidation by mixed mesophilic acidophiles was conducted under conditions of controlled and non-controlled redox potential to investigate the role of sessile microbes in pyrite oxidation. Microbes attached on pyrite surfaces by extracellular polymeric substances (EPS), and their high coverage rate was characterized by scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM) and atomic force microscopy (AFM). The dissolution of pyrite was negligible if the redox potential was controlled below 650 mV (near the rest potential of pyrite), even though the bacteria were highly active and a high coverage rate was observed on pyrite surfaces. However, with un-controlled redox potential the rate of pyrite oxidation increased greatly with an increasing redox potential. This study demonstrates that sessile microbes play a limited role in pyrite oxidation at a redox potential below 650 mV, and highlight the importance of solution redox potential for pyrite oxidation. This has implications for acid mine drainage control and pyrite oxidation control in biometallurgy practice.

SubtypeArticle
WOS HeadingsScience & Technology
DOI10.1038/s41598-017-04420-2
Indexed BySCI
Language英语
WOS KeywordMetal Sulfide Oxidation ; Thiobacillus-ferrooxidans ; Acidithiobacillus-ferrooxidans ; Dissolved-oxygen ; Leaching Kinetics ; Sulfur Chemistry ; Mechanism ; Dissolution ; Temperature ; Fundamentals
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationNational Natural Science Foundation of China(51674231 ; Bureau of International Co-operation, Chinese Academy of Sciences(122111KYSB20150013) ; 41401541)
WOS IDWOS:000405181400002
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22795
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Nat 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.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
4.Wanbao Min Ltd, Beijing 10053, Peoples R China
Recommended Citation
GB/T 7714
Liu, Chang,Jia, Yan,Sun, Heyun,et al. Limited role of sessile acidophiles in pyrite oxidation below redox potential of 650 mV[J]. SCIENTIFIC REPORTS,2017,7.
APA Liu, Chang.,Jia, Yan.,Sun, Heyun.,Tan, Qiaoyi.,Niu, Xiaopeng.,...&Ruan, Renman.(2017).Limited role of sessile acidophiles in pyrite oxidation below redox potential of 650 mV.SCIENTIFIC REPORTS,7.
MLA Liu, Chang,et al."Limited role of sessile acidophiles in pyrite oxidation below redox potential of 650 mV".SCIENTIFIC REPORTS 7(2017).
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