Leaching of chalcopyrite with ferric ion.: Part IV:: The role of redox potential in the presence of mesophilic and thermophilic bacteria

被引：82

作者：

Cordoba, E. M. ^{[2
]}

Munoz, J. A. ^{[1
]}

Blazquez, M. L. ^{[1
]}

Gonzalez, F. ^{[1
]}

Ballester, A. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Ciencia Mat & Ingn Met, E-28040 Madrid, Spain

[2] Univ Ind Santander, Fac Ingn, Escuela Ingn Met & Ciencia Mat, Bucaramanga, Colombia

来源：

HYDROMETALLURGY | 2008年 / 93卷 / 3-4期

关键词：

D O I：

10.1016/j.hydromet.2007.11.005

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

This paper reports a study on the effect of redox potential in chalcopyrite bioleaching in the presence of iron- and sulphur-oxidizing bacteria. Bioleaching tests were carried out in stirred Erlenmeyer flasks at 180 rpm, with 0.5 g of chalcopyrite mineral, 99 ml of a sulphate solution of Fe3+/Fe2+ (with the redox potential ranging between 300 and 600 mVAg/AgCl) at pH 1.8 and 1 ml of a mesophilic (35 degrees C) or thermophilic (68 degrees C) culture. The overoxidation of the leaching solution, due to the activity of iron-oxidizing microorganisms (Acidithiobacillus ferrooxidans, Leptospirillum ferrooxidans and Sulfolobus BC), favoured the precipitation of jarosite on chalcopyrite surfaces followed by passivation. Iron- and sulphur-oxidizing microorganisms, such as A. ferrooxidans and Sulfolobus BC adapted for 4 months to elemental sulphur as the sole energy source, recovered their iron-oxidizing ability after being contact with Fe2+. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：106 / 115

页数：10

共 33 条

[1] BACTERIAL LEACHING OF COMPLEX SULFIDE ORE SAMPLES IN BENCH-SCALE COLUMN REACTORS
AHONEN, L
TUOVINEN, OH
[J]. HYDROMETALLURGY, 1995, 37 (01) : 1 - 21
[2] CATALYTIC EFFECTS OF SILVER IN THE MICROBIOLOGICAL LEACHING OF FINELY GROUND CHALCOPYRITE-CONTAINING ORE MATERIALS IN SHAKE FLASKS
AHONEN, L
TUOVINEN, OH
[J]. HYDROMETALLURGY, 1990, 24 (02) : 219 - 236
[3] AN INVESTIGATION INTO BACTERIAL-CELL, FERROUS IRON, PH AND EH INTERACTIONS DURING THERMOPHILIC LEACHING OF COPPER CONCENTRATES
BARR, DW
JORDAN, MA
NORRIS, PR
PHILLIPS, CV
[J]. MINERALS ENGINEERING, 1992, 5 (3-5) : 557 - 567
[4] Oxidation of chalcopyrite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans in shake flasks
Bevilaqua, D
Leite, ALLC
Garcia, O
Tuovinen, OH
[J]. PROCESS BIOCHEMISTRY, 2002, 38 (04) : 587 - 592
[5] MICROORGANISMS IN LEACHING SULFIDE MINERALS
BRYNER, LC
JAMESON, AK
[J]. APPLIED MICROBIOLOGY, 1958, 6 (04) : 281 - 287
[6] MICROORGANISMS IN LEACHING SULFIDE MINERALS
BRYNER, LC
BECK, JV
DAVIS, DB
WILSON, DG
[J]. INDUSTRIAL AND ENGINEERING CHEMISTRY, 1954, 46 (12): : 2587 - 2592
[7] CORDOBA EM, HYDROMETALLURGY
[8] Studies on multi-metal ion tolerance of Thiobacillus ferrooxidans
Das, A
Modak, JM
Natarajan, KA
[J]. MINERALS ENGINEERING, 1997, 10 (07) : 743 - 749
[9] DEFILIPPO D, 1987, P INT S WARW ENGL, P245
[10] Bioleaching of complex zinc sulphides using mesophilic and thermophilic bacteria: comparative importance of pH and iron
Deveci, H
Akcil, A
Alp, I
[J]. HYDROMETALLURGY, 2004, 73 (3-4) : 293 - 303

← 1 2 3 4 →