Gold sorption by silicates in acidic and alkaline chloride media

Mohammadnejad, Sima; Provis, John L.; Deventer, J.S.J. van

doi:10.1016/j.minpro.2011.05.013

Cited by 33 publications

(28 citation statements)

References 23 publications

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“…With increasing community resistance to the use of cyanide, there is renewed interest in alternative lixiviants in both research and industry. The interaction of non-cyanide gold complexes including chloride, thiourea and thiosulphate in contact with framework (quartz and feldspar) and layer silicates (kaolinite and pyrophyllite) were studied experimentally in our group [3][4][5][6][7][8]. A significant preg-robbing effect was observed in most of the systems, contradicting previously held beliefs.…”

Section: Introductionmentioning

confidence: 77%

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Computational modelling of interactions between gold complexes and silicates

Mohammadnejad

Provis

Deventer

2017

Computational and Theoretical Chemistry

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Section: Introductionmentioning

confidence: 77%

“…Our previous experimental studies showed a considerable interaction between silicate solids and dissolved species with different gold complexes [7]. The key aim of this study is to examine these interactions at a molecular level using DFT methods.…”

Section: Interaction Of Gold Complexes With Silica Speciesmentioning

confidence: 98%

Computational modelling of interactions between gold complexes and silicates

Mohammadnejad

Provis

Deventer

2017

Computational and Theoretical Chemistry

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“…Sodium silicate absorbed gold and decreased the apparent leaching ratio of gold. 18) Figure 3 showed that the small amounts of NaOH could improve the leaching ratio of gold.…”

Section: Effect Of the Naoh Concentrationmentioning

confidence: 98%

“…Provis et al indicated that the newly-formed silica gels adsorbed gold from the solution in alkaline media. 18) Figure 3 is the morphology change of the ore sample with the ultrasound time when the NaOH concentration is 15%. In the SEM micrographs of these samples it can be observed that the size of the particles increased obviously with the ultrasound time.…”

Section: Effect Of Ultrasound Pretreatment Timementioning

confidence: 99%

Ultrasound-intensified Leaching of Gold from a Refractory Ore

et al. 2016

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The effect of ultrasonic energy on the pretreatment and leaching of gold from the refractory ore was investigated. Firstly, the refractory ore was pretreated with sodium hydroxide under ultrasound. Secondly, the pretreated ore was leached under ultrasound. The leaching ratio of gold decreased with increasing of the ultrasound pretreatment time from 1 to 5 h and the NaOH concentration from 5 to 20 wt%. The ultrasound increased remarkably the leaching ratio of gold when the pretreated ore was subjected to ultrasound leaching. The results showed that the appropriate acoustic power was a requirement during the ultrasound-intensified leaching. The leaching ratio of gold increased with an increasing of NaCN concentration from 6 to 18 kg/t. The results demonstrated that the ultrasound is a viable extractive metallurgy technique in pretreatment and leaching for the refractory gold ores.

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“…In their absence, gold extraction sharply decreases, in addition, to increase the reaction rate it is recommended to enter elemental sulfur in the system. Sorption on synthetic ion exchange materials is one of the most advanced methods for the hydrometallurgical extraction and concentration of noble and non-ferrous metals (Mohammadnejad et al, 2011;Kononova et al, 2014). For several decades a number of businesses have already been operating in the domestic industry using ion exchange resin sorption process both from the solutions and directly from ore slurries.…”

Section: Literature Reviewmentioning

confidence: 99%

Sorption Extraction of Noble and Non-Ferrous Metals from Process Leaching Solutions

Kenzhaliyev¹,

Iskhakova²,

Z.D³

2015

American Journal of Applied Sciences

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In view of the annual increase in ore processing output for low grade or refractory gold-bearing ores, as well as recoverable raw materials, stricter requirements for completeness of gold extraction and environmental safety, the interest is rising in possible alternatives to substitute the cyanide process used in gold mining practice. One of such alternatives is to convert metals into solutions of various chemical compositions by means of electric current-electrochemical leachingfollowed by metal sorption extraction. This paper deals with the issues of sorption behavior of noble (gold, silver) and non-ferrous (copper, iron, cobalt, zinc, nickel, manganese, lead) metals from thiosulfate solutions for chemical and electrochemical leaching of concentrates of two mineral deposits using various anionites. Factors affecting metal uptake most significantly were determined. Degree of zinc and nickel sorption extraction from electrochemical leaching solutions made 99%. It has been established that the nature of metal sorption extraction from process solutions is connected with the micro structure of leaching solutions having quasi-homogeneous structure.

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Gold sorption by silicates in acidic and alkaline chloride media

Cited by 33 publications

References 23 publications

Computational modelling of interactions between gold complexes and silicates

Computational modelling of interactions between gold complexes and silicates

Ultrasound-intensified Leaching of Gold from a Refractory Ore

Sorption Extraction of Noble and Non-Ferrous Metals from Process Leaching Solutions

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