Jarosite inclusion of fluoride and its potential significance to bioleaching of sulphide minerals

被引：28

作者：

Gunneriusson, Lars ^{[1
]}

Sandstrom, Ake ^{[2
]}

Holmgren, Allan ^{[1
]}

Kuzmann, Erno ^{[3
]}

Kovacs, Krisztina ^{[4
]}

Vertez, Attila ^{[3
,4
]}

机构：

[1] Lulea Univ Technol, Div Chem, SE-97187 Lulea, Sweden

[2] Lulea Univ Technol, Div Proc Met, SE-97187 Lulea, Sweden

[3] Eotvos Lorand Univ, Inst Chem, HAS, Chem Res Ctr,Lab Nucl Chem, H-1117 Budapest, Hungary

[4] Eotvos Lorand Univ, Inst Chem, Lab Nucl Chem, H-1518 Budapest, Hungary

来源：

HYDROMETALLURGY | 2009年 / 96卷 / 1-2期

关键词：

Jarosite; Solid solution; Fluoride sorption; Fluoride toxicity; Bioleaching; OXIDATION; SULFUR; IONS;

D O I：

10.1016/j.hydromet.2008.08.012

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Incorporation of fluoride ions into the structure of jarosite, a common precipitate in bioleaching, was studied. Crystalline jarosite was synthesized in the presence of various concentrations of fluoride ions and characterized by spectroscopic- and chemical analysis. The results showed that substantial amounts of fluoride were sorbed to jarosite. increasing with pH and fluoride concentration. FTIR, XRD and Mossbauer analysis supported a structural incorporation of the fluoride. Due to the size similarity between fluoride and hydroxide ions, a probable mechanism is an exchange of hydroxide ions and fluoride ions within the jarosite, giving the composition KFe3(SO4)(2)(OH)(6-x)F-x(s). For the maximum concentration of fluoride used during synthesis, 200 mM, about 25% of the hydroxide ions were exchanged for fluoride ions. The mass of jarosite precipitated shown to be highly dependent on the fluoride concentration, with approximately half the yield using 200 mM potassium fluoride compared to in the absence of fluoride ions. To test the influence on toxicity of the incorporation of fluoride in jarosite, a bioleaching study was performed at 65 degrees C. A suspension of pyrite concentrate with 4% solid content (w/v) in the modified 9 K medium was bioleached under additions of potassium fluoride. The results indicated a higher tolerance for fluoride ions, as compared to earlier reported studies on fluoride toxicity during bioleaching. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：108 / 116

页数：9

共 27 条

[1] THE RELATIVE AFFINITIES OF LIGAND ATOMS FOR ACCEPTOR MOLECULES AND IONS [J].

AHRLAND, S ;

CHATT, J ;

DAVIES, NR .

QUARTERLY REVIEWS, 1958, 12 (03) :265-276

[2]

[Anonymous], P 16 INT BIOH S CAP

[3] Solubility of jarosite at 4-35 degrees C [J].

Baron, D ;

Palmer, CD .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1996, 60 (02) :185-195

[4] The visible and infrared spectral properties of jarosite and alunite [J].

Bishop, JL ;

Murad, E .

AMERICAN MINERALOGIST, 2005, 90 (07) :1100-1107

[5] Vibrational spectra of synthetic minerals of the alunite and crandallite type [J].

Breitinger, DK ;

Kriegelstein, R ;

Bogner, A ;

Schwab, RG ;

Pimpl, TH ;

Mohr, J ;

Schukow, H .

JOURNAL OF MOLECULAR STRUCTURE, 1997, 408 :287-290

[6] INHIBITORY EFFECTS OF PARTICULATE MATERIALS IN GROWING CULTURES OF THIOBACILLUS-FERROOXIDANS [J].

DISPIRITO, AA ;

DUGAN, PR ;

TUOVINEN, OH .

BIOTECHNOLOGY AND BIOENGINEERING, 1981, 23 (12) :2761-2769

[7] Silicate mineral dissolution during heap bioleaching [J].

Dopson, Mark ;

Halinen, Anna-Kaisa ;

Rahrmen, Nelli ;

Bostrom, Dan ;

Sundkvist, Jan-Eric ;

Riekkola-Vanhanen, Marja ;

Kaksonen, Anna H. ;

Puhakka, Jaakko A. .

BIOTECHNOLOGY AND BIOENGINEERING, 2008, 99 (04) :811-820

[8]

Dutrizac J.E., 1976, CAN MINERAL, V14, P151, DOI DOI 10.1016/J.HYDROMET.2003.07.009

[9] Jarosites and their application in hydrometallurgy [J].

Dutrizac, JE ;

Jambor, JL .

SULFATE MINERALS - CRYSTALLOGRAPHY, GEOCHEMISTRY AND ENVIRONMENTAL SIGNIFICANCE, 2000, 40 :405-452

[10] A Raman spectroscopic study of selected natural jarosites [J].

Frost, RL ;

Wills, RA ;

Weier, ML ;

Martens, W ;

Mills, S .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2006, 63 (01) :1-8

← 1 2 3 →