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The current study deals with the selective recovery of gold over copper from synthetic and real thiocyanate PLS using ion exchange resins. Consequently, selective adsorption of Au(I) by ion exchange resins and selective Au(I) elution by proper eluent is proposed to obtain a high-purity Au(I) solution.
This paper will specifically investigate the recovery of gold using ion-exchange resins in a thiosulfate-thiourea lixiviant solution. A range of resins of different …
The results indicate good premises for gold recovery by ion-exchange resins, since minimal thiosulfate consumption also ensures low polythionate concentration, which is an important issue in gold ...
Recovery of gold, silver and nickel from alkaline cyanide solutions by means of weak-base ion-exchange resins. Journal of Applied Chemistry 1958, 8 (2), 77-86.
In this paper one strong acidic, one strong basic and one weak basic ion-exchange resins, considered as exhausted in an industrial demineralizing plant, are screened for gold recovery from cyanide solutions. Based on the observed ability for the recovery and on the ease of regeneration, the weak base anion exchanger Purolite A …
Table 9.10 Some properties of ion exchange resins for recovery and removal of silver from aqueous industrial solutions ... Rogachev I, Meinhardt E, Kautzmann R, Cortina JL, …
The Langmuir equilibrium constants (b) of the raw biomass and PEIB were 0.024 and 0.012 L mg −1, respectively, indicating an affinity between gold(I) and the biosorbent. The ion exchange resin achieved the highest gold(I) loading of 427.771 mg g −1. Download : Download full-size image; Fig. 2.
The reason for that could be the quick way the gold undergoes the ion exchange process, so even in lower volume ratios its concentration in the resin is too high to determine the isotherm. ... Nikoloski, A.N.; Ang, K.L. Review of the application of ion exchange resins for the recovery of platinum-group metals from hydrochloric acid …
Current research about gold recovery by ion exchange resins from pregnant thiosulfate solutions is in its infancy and a large number of further work is needed to make the recovery technique more efficient, …
The extraction of gold from chloride solutions by ion exchange is examined. It is shown that at initial gold concentrations between 1-5 ppm, 20 g/l Cl-and pH 5, the kinetics of loading on weak base resins are slightly slower than those observed with activated charcoal. Equilibrium loading of auric chloride varies considerably as a function of pH …
Here are some specific types of resins used in gold recovery: Anion exchange resins: These target negatively charged gold complexes commonly found in certain leaching solutions (e.g., thiosulfate solutions). Special gold-selective resins: These are designed to be particularly good at attracting gold ions while minimizing other metals.
Recently, Choi et al. (2020) studied the sequential selective recovery of Au and Cu from a bio-leached cyanide solution containing 366 mg/L Cu and 23 mg/L Au by two ion exchangers i.e., Amberjet™ 4200 (anion exchange resin) and Amberlite IRC-86 (cation exchange resin) at different pH values. Based on their studies, over 98% Au was …
Therefore this work has intended to investigate the ion exchange recovery of gold from iodide solutions in order to develop a method that may be incorporated with the in situ leaching process. 2. Experimental. The chloride form of Purolite A500/2788, a strong base anion exchange resin, was used throughout this work.
Abstract The use of an ion exchange resin in the recovery of copper cyanide complexes from wastewater and the recycling of the cyanide used in cyanidation to the gold cyanidation step is an…
Commercially available strongly basic anion exchange resins were obtained in their wet forms and used without treatment. The resins involved in this work, including Dowex G51, Dowex 21K and Amberlite IRA-410, were selected from a group of resins that had been investigated previously (Zhang and Dreisinger, 2002a).These resins are all of …
Ion-exchange process involving the adsorption of gold from a leach solution using a cation-exchange polymer resin have been utilised for gold recovery from e-waste. 82 The basic process is similar to CIC except …
The sorption capacity of the sorbents of gold(I) ion from the gold(I)–cyanide complex solution were examined by the pH edge and isotherm experiments. The maximum uptakes of gold by ion exchange resin (Amberjet™ 4400), activated carbon, and PEIB were 427.77, 170.64 and 361.76 mg g −1, respectively. To recover gold as a metallic …
To produce a high-purity gold product, it is important to minimize the interference of metal ions in the purification steps. The current study investigated the selective recovery of gold from thiocyanate PLS approaching selective adsorption of gold by ion exchange resins and then a selective elution of gold from loaded resins.
What is resin for gold recovery? There are different types of resins used for gold recovery, but they generally fall under the category of ion-exchange resins. …
Among those methods, ion exchange resins can adsorb gold with high adsorption efficiency and regenerate easily as well. This paper focuses on the research …
This paper will specifically investigate the recovery of gold using ion-exchange resins in a thiosulfate-thiourea lixiviant solution. A range of resins of different functionalities: Purolite® A200 (Type II quaternary ammonium), Lewatit® MonoPlus TP 214 and Puromet® MTS9140 (thiourea), Dowex™ M-4195 (bis-picolylamine) and Lewatit® …
Gold-selective ion exchange resins have been designed to have a high selectivity for the monovalent Au(CN) 2 - (and Ag(CN) 2 - ) species. Any other metals that forms similar complexes, such as Cu(CN) 2-, will compete for active sites on the resin and reduce the …
Elemental sulfur and sulfide deriving from these reactions deposit on gold surface and passivate its dissolution. In addition, polythionates generated from thiosulfate decomposition can recapture aurothiosulfate [Au(S 2 O 3) 2] 3− from ion exchange resins and thus hinder gold recovery by resin adsorption [33,34]. Thus, thiosulfate ...
Ion Exchange Resin Technology in Recovery of Precious and Noble Metals A. Mohebbi, A. Abolghasemi Mahani and A. Izadi ... [Au]3− and the resins used in gold recovery are all weak, medium and strong base anion exchange resins [28, 32, 35]. Cyanidation is the most commonly used method for the recovery of gold from its ores. Generally, the ...
Ion exchange has been widely applied in technology of chemical separation of noble metal ions. This is associated with dissemination of methods using various ion exchange resins which are indispensable in many fields of chemical industry. Due to small amounts of noble elements in nature and constant impoverishment of their natural raw …
DOI: 10.1016/j.seppur.2023.124481 Corpus ID: 259763092; Gold recovery from pregnant thiosulfate solution by ion exchange resin: Synergistic desorption behaviors and mechanisms
The company Jacobi Group offers a full range of carbon products to serve the gold recovery industry. These include granular activated carbon grades, and higher capacity granular activated carbon (Group, 2017). 5.2. Ion-exchange resins (IX) The application of ion-exchange resins is an alternative to separate gold ions.
These solutions are then subjected to separation and purification procedures such as cementation, reduction, adsorption, coagulation, solvent extraction, ion exchange resin, gravity separation, ionic flotation, emulsion liquid membrane electro-winning and coal-gold agglomeration (CGA). A list of gold recovery agents is presented in Table 2.
GOLD RECOVERY FROM COPPER-RICH ORES EMPLOYING THE PUROLITE S992 GOLD-SELECTIVE ION EXCHANGE RESIN 1 1GOLD RECOVERY FROM COPPER -RICH ORES EMPLOYING THE PUROLITE S9 92 GOLD-SELECTIVE ION EXCHANGE RESIN J. van Deventer*, M. Kotze**, V Yahorava** * Purolite International, South Africa …
Gold-Selective Ion Exchange Resins vs. ery of GoldPresented at the Alta 2014 Gold Conference, 24–31 May 2014, Perth, AustraliaThis paper included test work conducted …
DOI: 10.1016/j.rcradv.2023.200182 Corpus ID: 262205568; Gold recovery from synthetic mine tailings leachate using chelating ion exchange resins with thiosulfate-thiourea lixiviant
Application of ion-exchange resins to the recovery of gold is described. Significant developments around gold-selective anion-exchange resins and the commercialization of at least two of these ...
Hydrometallurgical gold recovery processes play a pivotal role in the gold mining industry, contributing to more than 90% of global gold production. Among the …
The principal technological scheme of desorption of gold and accompanying metal-impurities from the AM-2B resin phase used for the sorption processing of gold-bearing ores is considered.
Recovery of the dissolved gold from the leaching solution then follows. This can be accomplished using activated carbon, membranes (Andrade et al., 2017; Villalobos et al., 2014), bioadsorbents (Tsuruta, 2004), solvent extraction (Raiguel et al., 2020) and ion-exchange resins (Choi et al., 2020; Gomes et al., 2001).