Comparison of ion-exchange resins and activated carbon in recovering gold from cyanide leach solutions with low level of copper.

Msumange, Deus Albert; Yazıcı, Ersin; Celep, Oktay; Deveci, Hacı

doi:10.19111/bulletinofmre.955403

Cited by 4 publications

(4 citation statements)

References 10 publications

(6 reference statements)

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“…IX is known for its high selectivity, leveraging specific functional groups on the resin surface that are optimal for gold extraction. On the other hand, AC typically shows a higher gold recovery capacity than IX resins [44]. The elution process in IX is generally simpler, although the overall costs associated with IX are higher.…”

Section: Ion Exchange Of Goldmentioning

confidence: 99%

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Advances in Hydrometallurgical Gold Recovery through Cementation, Adsorption, Ion Exchange and Solvent Extraction

Kim,

Han

2024

Minerals

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Hydrometallurgical gold recovery processes play a pivotal role in the gold mining industry, contributing to more than 90% of global gold production. Among the array of techniques available, the Merrill–Crowe process, adsorption, ion exchange, and solvent extraction are central in extracting gold from leach solutions. While the Merrill–Crowe process and gold complex adsorption onto activated carbon represent historical cornerstones, their inherent limitations have prompted the emergence of more recent innovations in ion exchange and solvent extraction, offering enhanced selectivity, control, and sustainability. The evolution of modern organic chemistry has significantly influenced the progress of ion exchange technology, mainly through the introduction of advanced polymer matrix synthetic resins. At the same time, novel solvents tailored to gold complex interactions have revitalized ion exchange and solvent extraction. Introducing ionic liquids and deep eutectic solvents has also added a new dimension to efforts to improve gold extraction metallurgy. This paper reviews these cutting-edge developments and their potential to revolutionize the hydrometallurgical gold recovery process, addressing the pressing need for improved efficiency and environmental responsibility.

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Section: Ion Exchange Of Goldmentioning

confidence: 99%

“…It is indicated that strong-base resins were predominantly used for gold extraction. Msumange et al (2022) compared IX resins and AC from leach liquor derived from copper-rich refractory gold ore [44]. For this study, Purogold A194 and S992 were utilized as IX resins, representing strong-base and weak-base resins, respectively.…”

Section: Ion Exchange Of Goldmentioning

confidence: 99%

Advances in Hydrometallurgical Gold Recovery through Cementation, Adsorption, Ion Exchange and Solvent Extraction

Kim,

Han

2024

Minerals

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“…Activated carbon (NORIT GAC 1240), strong base (Purogold A194), and weak base (Purogold S992) resins were tested as the adsorbents. The activated carbon was found to be the best adsorbent as it achieved the largest gold loading [10]. Thiourea-modified chitosan-imprinted resin (IM-TUCS) was tested for gold(III) ion sorption.…”

Section: Introductionmentioning

confidence: 99%

Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent

et al. 2023

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Modular connectors are applied by computer users, and they can be metallic secondary sources containing metals such as gold and copper. Because gold is a micro-component, the solution obtained after the pin digestion contains a low concentration of gold(III) ions, and efficient and selective sorbent should be used for gold(III) ion recovery. The selective removal of small amounts of gold(III) from 0.001–6 M hydrochloric acid solutions using pure and solvent-impregnated macroporous polystyrene crosslinked with divinylbenzene sorbents (Purolite MN 202 and Cyanex 272) is presented. Gold(III) ions were recovered effectively from the chloride solution after the digestion of the modular connector RJ 45 (8P8C) using Purolite MN 202 after the impregnation process. The dependence of the recovery percentage (R%) of gold(III) on the contact time was determined. The highest value of gold(III) ion sorption capacity (259.45 mg·g−1) was obtained in 0.001 M HCl for Purolite MN202 after the Cyanex 272 impregnation. The results can be applied to gold recovery from e-waste. The presented method of gold recovery does not generate nitrogen oxides and does not require the use of cyanides.

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“…Gold is recovered from its raw materials by bioleaching or cyanidation, followed by other operations, i.e., adsorption on the activated carbon [ 1 , 2 , 3 ], zinc precipitation [ 3 , 4 ] and ion exchange [ 2 , 5 ]. However, in recent years, and due to environmental and economic issues, the recovery of this metal (and others) from the wastes generated by humans is of increasing interest, and this is how the concepts of the circular economy and urban mining come in modern life.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Pseudo-Protic Ionic Liquids to Extract Gold(III) from HCl Solutions

Robla

2023

IJMS

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Solvent extraction of gold(III) from HCl media using pseudo-protic ionic liquids (PPILs) dissolved in toluene as the extractant phase is investigated. Three PPILs are generated from the reaction of commercially available amines and 1 M HCl solution and named as pri-NH2H+Cl- (derived from the primary amine Primene 81R), sec-NHH+Cl− (derived from the secondary amine Amberlite LA2) and ter-NH+Cl− (derived from the tertiary amine Hostarex A327). In the above structures, -NH2H+Cl−, -NHH+Cl− and -NH+Cl− represented the active groups (anion exchangers) of the respective PPIL. In the case of gold(III) extraction, the experimental variables investigated included the equilibration time (2.5–30 min), temperature (20–60 °C), HCl concentrations (1–10 M) in the aqueous phase, gold(III) concentration (0.005–0.05 g/L) in this same phase, and PPILs concentrations in the organic phase. From the experimental data, and using the Specific Interaction Theory, the interaction coefficients (ε) for the pair AuCl4−, H+ are estimated for the systems involving the three PPILs. Gold(III) is recovered from the metal-loaded organic phases using sodium thiocyanate solutions, and from these, gold is finally recovered by the precipitation of zero-valent gold (ZVG) nanoparticles.

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Comparison of ion-exchange resins and activated carbon in recovering gold from cyanide leach solutions with low level of copper.

Cited by 4 publications

References 10 publications

Advances in Hydrometallurgical Gold Recovery through Cementation, Adsorption, Ion Exchange and Solvent Extraction

Advances in Hydrometallurgical Gold Recovery through Cementation, Adsorption, Ion Exchange and Solvent Extraction

Selective Recovery of Gold from Electronic Waste by New Efficient Type of Sorbent

On the Use of Pseudo-Protic Ionic Liquids to Extract Gold(III) from HCl Solutions

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