Cyanide and Other Lixiviant Leaching Systems for Gold with Some Practical Applications

Sparrow, Graham J.; Woodcock, J.T.

doi:10.1080/08827509508914125

Cited by 66 publications

(35 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that the most stable complex of gold was formed with cyanide, having the highest stability constant value than the other leaching reagents [24]. A new leaching reagent mixture for gold from different rock types constituting a mixture of cyanide, thiosulphate with optimum stoichiometric ratio, and hydrogen peroxide was used in the present work.…”

Section: Leaching Procedures For Different Rock Samplesmentioning

confidence: 99%

The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

Fouad¹,

Elrakaiby²,

Hashim³

2015

AJAC

View full text Add to dashboard Cite

A developed method was designed for gold determination directly in organic medium in some sedimentary rocks (fine sandstone, carbonates), pyrite, serpentine and international standard gold sample (MA-1a) using flame atomic absorption spectroscopy (FAAS). Instrumental parameters; burner angle, fuel flow rate, band pass and burner height together with chemical parameters; different media, leaching and interference effect were optimized to improve gold determination. Selective leaching using a new mixture (5% KCN, 5% Na2S2O3 and hydrogen peroxide) offered maximum leaching percentage of gold (>99%) with minimal concentration of accompanying elements. Extraction parameters using methyl isobutyl ketone (MIBK) from 3 M HCl were optimized for more than 99% gold extraction, followed by scrubbing using 0.1 M HCl. Gold was determined directly in organic phase. Beer's law was obeyed from 0.01 μg/ml to 10 μg/ml. Standard deviation (from 0.017 to 1.05) and percentage error (from 1.5% to 2.5%) using the present developed AAS method were calculated.

show abstract

Section: Leaching Procedures For Different Rock Samplesmentioning

confidence: 99%

The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

Fouad¹,

Elrakaiby²,

Hashim³

2015

AJAC

View full text Add to dashboard Cite

show abstract

“…Gold in an aqueous thiocyanate solution forms stable Au(I) and Au(III) complexes, as following reactions show: [4], [21], [22], [36]- [39] ( ) 2 Au 2SCN Au SCN e − + = +…”

Section: Thiocyanatementioning

confidence: 99%

“…The metal dissolution generally occurs in neutral medium in the presence of oxygen: [4], [5], [22], [38], [41] ( ) …”

Section: Thiosulfatementioning

confidence: 99%

“…In acidic solutions it forms an anionic complex to dissolve gold, as following equation shows: [1], [4], [5], [22], [44] ( )…”

Section: Thiourea Leachingmentioning

confidence: 99%

“…Therefore it is just used in small and medium scale processes such as electrolyte in gold refining. Another disadvantage is the loss of containing silver by formation of AgCl [21], [22], [24].…”

Section: Aqua Regiamentioning

confidence: 99%

See 2 more Smart Citations

A Review on Alternative Gold Recovery Re-agents to Cyanide

Gökelma¹,

Birich²,

Stopić³

et al. 2016

MSCE

View full text Add to dashboard Cite

The importance of gold recovery from low grade ores and flotation tailings is continuously increasing due to raising gold demand and thereby high gold prices. However, due to raising social awareness of the ecological impacts of cyanidic gold extraction and environ-mental specifications, the development and the implementation of alternative hydrometallurgical extraction processes have been a focus for many research institutions in last decades. Present work gives a comparison between compatible extraction reagents, with focus on less harmful processes. The target of this review is to point out the best cyanide-free processes of following methods and reagents: Bioleaching, Chlorination, Aqua Regia, Bromine, Thiocyanate, Thiosulfate and Thiourea leaching. For this propose, the gold leaching reagents are described and discussed in terms of their environmental and economical points of view. As result of this comparison, thiourea stands out as the most promising alternative gold leaching reagent to cyanide.

show abstract

Adsorption of a gold‐iodide complex (AuI₂⁻) onto cellulose acetate‐polyaniline membranes: Equilibrium experiments

Medellín‐Rodríguez¹,

Castillo‐Ortega²,

Encinas³

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Cyanide and Other Lixiviant Leaching Systems for Gold with Some Practical Applications

Cited by 66 publications

References 53 publications

The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

A Review on Alternative Gold Recovery Re-agents to Cyanide

Adsorption of a gold‐iodide complex (AuI₂⁻) onto cellulose acetate‐polyaniline membranes: Equilibrium experiments

Contact Info

Product

Resources

About

Cyanide and Other Lixiviant Leaching Systems for Gold with Some Practical Applications

Cited by 66 publications

References 53 publications

The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

The Application of Flame Atomic Absorption Spectrometry for Gold Determination in Some of Its Bearing Rocks

A Review on Alternative Gold Recovery Re-agents to Cyanide

Adsorption of a gold‐iodide complex (AuI2−) onto cellulose acetate‐polyaniline membranes: Equilibrium experiments

Contact Info

Product

Resources

About

Adsorption of a gold‐iodide complex (AuI₂⁻) onto cellulose acetate‐polyaniline membranes: Equilibrium experiments