Biohydrometallurgy of Chalcopyrite

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BIOHYDROMETALLURGY OF CHALCOPYRITE
BIOHYDROMETALLURGY OF CHALCOPYRITE
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Contents
Preface
1 - Microorganisms used in chalcopyrite bioleaching
	1.1 Overview of bioleaching microorganisms
	1.2 Structure composition and functional diversity of microbial communities
		1.2.1 Sequencing, de novo assembly, gene prediction, and functional annotation
		1.2.2 Taxonomic assignment of metagenome datasets
		1.2.3 Key genes coding for enzymes associated with principal metabolisms
			1.2.3.1 Autotrophic carbon fixation
			1.2.3.2 Nitrogen metabolism
			1.2.3.3 Ferrous iron oxidation
			1.2.3.4 Sulfur metabolism
		1.2.4 Conclusions
	1.3 Functional role of coexisting bacteria in bioleaching systems
		1.3.1 Phylogeny of newly sequenced strains and overall genome statistics
		1.3.2 Identification of core genes and flexible genes
		1.3.3 Comparison of inferred metabolic profiles
			1.3.3.1 Central carbon metabolism
			1.3.3.2 Nitrogen uptake
			1.3.3.3 Iron-sulfur cycling
		1.3.4 Conclusions
	1.4 Ecology and metabolism of sulfur- and/or iron-oxidizing Acidithiobacillus
		1.4.1 General characteristics of all four Acidithiobacillus species
		1.4.2 Metabolic diversity of Acidithiobacillus spp
			1.4.2.1 Carbon metabolism
			1.4.2.2 Nitrogen metabolism
			1.4.2.3 Sulfur metabolism
		1.4.3 Conclusions
	Acknowledgments
	References
2 - Properties of chalcopyrite
	2.1 Oxidation state of Cu, Fe, and S elements
	2.2 Electronic structure
	2.3 Reconstruction of chalcopyrite surfaces
		2.3.1 (0 0 1) surface
		2.3.2 (1 1 2) surface
	2.4 Summary
	Acknowledgments
	References
3 - Electrochemical dissolution process of chalcopyrite
	3.1 Electrochemical behavior of chalcopyrite
	3.2 Surface species of chalcopyrite after treatment by different potentials
	3.3 Disulfide and polysulfide passivation of the chalcopyrite surface
	3.4 Optimum range of redox potential for chalcopyrite leaching
		3.4.1 Fe2+ accelerating dissolution of chalcopyrite
		3.4.2 Effect of Cu2+ ions on chalcopyrite leaching
		3.4.3 Thermodynamic calculation
		3.4.4 Impact of electronic structure on leaching of chalcopyrite
	3.5 Enhancing bioleaching of chalcopyrite by controlling the solution potential
	3.6 Summary
	Acknowledgments
	References
4 - Dissolution and passivation mechanism of chalcopyrite in bioleaching
	4.1 Passivation mechanism of chalcopyrite bioleaching
		4.1.1 Brief overview of passivating species
			4.1.1.1 Polysulfide
			4.1.1.2 Elemental sulfur
			4.1.1.3 Insoluble sulfate
		4.1.2 Bioleaching behavior
		4.1.3 Intermediate species analysis
		4.1.4 Discussions on the passivation mechanism
	4.2 Effects of mineralogical properties on passivation and dissolution mechanism
		4.2.1 Bioleaching behavior
		4.2.2 Intermediate species analysis
		4.2.3 Electrochemical analysis
	4.3 Brief overview of effects of mineralogical properties
		4.3.1 Semiconductor property
		4.3.2 Phase
		4.3.3 Anisotropic crystal surface
	4.4 Summary
	Acknowledgments
	References
5 - Role of gangue minerals in chalcopyrite bioleaching
	5.1 Role of marmatite in chalcopyrite bioleaching
		5.1.1 Bioleaching behavior
		5.1.2 Intermediate species analysis
		5.1.3 Electrochemistry analysis
		5.1.4 Cu and Ag recovery from bioleaching residue
	5.2 Role of pyrite in chalcopyrite bioleaching
		5.2.1 Galvanic effect
		5.2.2 Mediating the oxidation-reduction potential (reduction mechanism)
	5.3 Other gangue minerals
	5.4 Summary
	Acknowledgments
	References
6 - Chalcopyrite bioleaching catalyzed by silver
	6.1 Catalytic mechanism of silver ions in chalcopyrite bioleaching
		6.1.1 Dissolution experiments
		6.1.2 Density functional theory calculations on catalytic mechanism of Ag+
		6.1.3 Surface species
		6.1.4 Surface properties
		6.1.5 Discussions on the catalytic mechanisms of Ag+
	6.2 Catalyzed bioleaching using silver-containing waste
		6.2.1 Comprehensive process
		6.2.2 Recovery of Cu in bioleaching
		6.2.3 Recovery of Ag in thiourea leaching
	6.3 Summary
	Acknowledgments
	References
7 - Industrial application for chalcopyrite bioleaching
	7.1 Bioleaching technology
	7.2 Industrial practice cases
	7.3 Key parameters and controlling techniques
		7.3.1 Redox potential/oxidation-reduction potential
		7.3.2 pH
		7.3.3 Temperature
		7.3.4 The others
	7.4 Summary
	Acknowledgments
	References
Index
	A
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	D
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	I
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