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Electrochemical Behavior of Ocean Polymetallic Nodules and Low-Grade Nickel Sulfide Ore in Acidithiobacillus Ferrooxidans-Coupled Bio-Leaching
Kang, Jin-Xing1; Feng, Ya-Li1; Li, Hao-Ran2; Du, Zhu-Wei2; Deng, Xiang-Yi1; Wang, Hong-Jun1
2019-02-01
Source PublicationMINERALS
ISSN2075-163X
Volume9Issue:2Pages:20
AbstractEfficient extraction of Ni, Co, Cu, and Mn from low-grade and refractory ores is a common technical challenge. The present study proposes an Acidithiobacillus ferrooxidans-coupled leaching of Ni, Cu, Co, and Mn from oceanic polymetallic nodules and low-grade nickel sulfide ore, and focuses on the electrochemical behavior of the ores in simulated bio-leaching solutions. In the dissolution of polymetallic nodules, A. ferrooxidans facilitates the diffusion of H+ and accelerates electron transfer, producing a decrease in charge transfer resistance and promoting the Mn(IV)-preceding reaction. The use of A. ferrooxidans is beneficial for lower impedance of sulfur-nickel ore, faster diffusion rate of product layer, and better transformation of the Fe3+/Fe2+ couple and S-0/S2- couple. A. ferrooxidans increases the potential difference between the nodule cathode and sulfide anode, and increases electron liberation from the sulfide ore. This motivates a significant increase in the average extraction rates of Ni, Co, Cu, and Mn in the bacterial solution. The bio-leaching efficiencies of Ni, Co, Cu, and Mn were as high as 95.4%, 97.8%, 92.2% and 97.3%, respectively, representing improvements of 17.1%, 11.5%, 14.3% and 12.9% relative to that of the germ- and Fe(III)-free acidic 9 K basic system.
Keywordcoupled bio-leaching electrochemistry behavior Acidithiobacillus ferrooxidans polymetallic nodules low-grade nickel sulfide ore
DOI10.3390/min9020070
Language英语
WOS KeywordMANGANESE ; MECHANISM ; PYROLUSITE ; METALS ; PYRITE ; BIOOXIDATION ; DISSOLUTION ; PYRRHOTITE ; OXIDATION ; MINERALS
Funding ProjectMajor Science and Technology Program for Water Pollution Control and Treatment[DY135-B2-15] ; National Natural Science Foundation of China[2015ZX07205-003] ; [21176026] ; [21176242]
WOS Research AreaMineralogy ; Mining & Mineral Processing
WOS SubjectMineralogy ; Mining & Mineral Processing
Funding OrganizationMajor Science and Technology Program for Water Pollution Control and Treatment ; National Natural Science Foundation of China
WOS IDWOS:000460799000004
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28345
Collection中国科学院过程工程研究所
Corresponding AuthorFeng, Ya-Li; Li, Hao-Ran
Affiliation1.Univ Sci & Technol, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Kang, Jin-Xing,Feng, Ya-Li,Li, Hao-Ran,et al. Electrochemical Behavior of Ocean Polymetallic Nodules and Low-Grade Nickel Sulfide Ore in Acidithiobacillus Ferrooxidans-Coupled Bio-Leaching[J]. MINERALS,2019,9(2):20.
APA Kang, Jin-Xing,Feng, Ya-Li,Li, Hao-Ran,Du, Zhu-Wei,Deng, Xiang-Yi,&Wang, Hong-Jun.(2019).Electrochemical Behavior of Ocean Polymetallic Nodules and Low-Grade Nickel Sulfide Ore in Acidithiobacillus Ferrooxidans-Coupled Bio-Leaching.MINERALS,9(2),20.
MLA Kang, Jin-Xing,et al."Electrochemical Behavior of Ocean Polymetallic Nodules and Low-Grade Nickel Sulfide Ore in Acidithiobacillus Ferrooxidans-Coupled Bio-Leaching".MINERALS 9.2(2019):20.
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