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Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers
Alternative TitleHydrometallurgy
Long, ZE; Huang, YH; Cai, ZL; Wei, C; Fan, OY
2004-10-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume74Issue:3-4Pages:181-187
AbstractBio-oxidation of ferrous ion by immobilized Acidithiobacillus ferrooxidans is potentially useful in the new technology of two-step bioleaching. The kinetics of continuous oxidation of ferrous ion by PVA-cryogel-immobilized A. ferrooxidans was investigated in a 365-ml packed-bed bioreactor. The effects of ferrous ion concentration and operating dilution rate of the bioreactor on the kinetics of ferrous ion oxidation were examined. Media containing 1-11.5 g/L ferrous ion were tested. For each medium, the kinetics of reaction at different dilution rate, at a constant temperature of 31degreesC, were determined. For a medium containing 3.8 g/L or less ferrous ion, the oxidation rate was proportional to the dilution rate of the bioreactor, and the highest oxidation rate of 2.3 g/L h was achieved at the dilution rate of 0.76 l/h with a medium containing 3.8 g/L ferrous iron. In contrast, for a medium containing more ferrous ion, the kinetic performance of the bioreactor showed a plateau region that was independent of volumetric loading or even exhibited a decrease at high dilution rate. Under these circumstances, the increase of concentration of ferrous ion led to a lower dilution rate, at which the maximum oxidation rate was achieved, and a lower maximum oxidation rate. The results indicated an inhibitory effect of high ferrous ion concentration on the activity of immobilized A. ferrooxidans. (C) 2004 Elsevier B.V. All rights reserved.; Bio-oxidation of ferrous ion by immobilized Acidithiobacillus ferrooxidans is potentially useful in the new technology of two-step bioleaching. The kinetics of continuous oxidation of ferrous ion by PVA-cryogel-immobilized A. ferrooxidans was investigated in a 365-ml packed-bed bioreactor. The effects of ferrous ion concentration and operating dilution rate of the bioreactor on the kinetics of ferrous ion oxidation were examined. Media containing 1-11.5 g/L ferrous ion were tested. For each medium, the kinetics of reaction at different dilution rate, at a constant temperature of 31degreesC, were determined. For a medium containing 3.8 g/L or less ferrous ion, the oxidation rate was proportional to the dilution rate of the bioreactor, and the highest oxidation rate of 2.3 g/L h was achieved at the dilution rate of 0.76 l/h with a medium containing 3.8 g/L ferrous iron. In contrast, for a medium containing more ferrous ion, the kinetic performance of the bioreactor showed a plateau region that was independent of volumetric loading or even exhibited a decrease at high dilution rate. Under these circumstances, the increase of concentration of ferrous ion led to a lower dilution rate, at which the maximum oxidation rate was achieved, and a lower maximum oxidation rate. The results indicated an inhibitory effect of high ferrous ion concentration on the activity of immobilized A. ferrooxidans. (C) 2004 Elsevier B.V. All rights reserved.
KeywordAcidithiobacillus Ferrooxidans Bio-oxidatIon Of Ferrous Ion Immobilization Packed-bed Bioreactor Poly(Vinyl Alcohol) Cryogel
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2004.03.006
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPACKED-BED REACTORS ; THIOBACILLUS-FERROOXIDANS ; SULFATE OXIDATION ; IRON OXIDATION ; FERRIC IRON ; BIOOXIDATION ; CELLS
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000224564200001
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4958
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100080, Peoples R China
2.Jiangxi Normal Univ, Coll Life Sci, Nanchang 330027, Peoples R China
Recommended Citation
GB/T 7714
Long, ZE,Huang, YH,Cai, ZL,et al. Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers[J]. HYDROMETALLURGY,2004,74(3-4):181-187.
APA Long, ZE,Huang, YH,Cai, ZL,Wei, C,&Fan, OY.(2004).Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers.HYDROMETALLURGY,74(3-4),181-187.
MLA Long, ZE,et al."Kinetics of continuous ferrous ion oxidation by Acidithiobacillus ferrooxidans immobilized in poly(vinyl alcohol) cryogel carriers".HYDROMETALLURGY 74.3-4(2004):181-187.
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