Sequential process of sorption and incineration for recovery of gold from cyanide solutions: Comparison of ion exchange resin, activated carbon and biosorbent

Kwak, In Seob; Bae, Min A; Won, Sangchul; Mao, Juan; Krishnamurthy, S.; Park, Jiyeong; Sathishkumar, M.; Yun, Yeoung‐Sang

doi:10.1016/j.cej.2010.09.027

Cited by 52 publications

(9 citation statements)

References 21 publications

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“…In the spectra, Au 4f [Figure (b)] doublet peaks 4f 7/2 , 4f 5/2 (87.25 and 90.92 eV), responsible for Au(III), are dominating. These energies have been previously assigned to the HAuCl 4 used for the proceeded sorption process . Its amount, basing on the proceeded XPS analysis has been estimated as 75.4% of the total amount of gold adsorbed on the surface of the Dowex M4195 resin.…”

Section: Resultsmentioning

confidence: 99%

Spontaneous formation of gold microplates during reduction‐coupled removal of noble metals using Dowex M4195 resin

Jermakowicz-Bartkowiak

Cyganowski

Leśniewicz

et al. 2015

J of Applied Polymer Sci

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The present work reports the novel phenomenon of spontaneous formation of gold microplates. The effect is observed as a consequence of AuCl Therefore an attempt to explain the phenomenon mechanism is made. The research is covering sorption, kinetic and thermodynamic studies. The shapes of formed gold single plates are determined. The uptakes of Au(III), Pt(IV), Pd(II), and Re(VII) tests have been conducted using a batch method from single-component metals solutions in 0.1M HCl. The sorption-reduction phenomenon has been assessed by executed SEM, FTIR, XRD, and XPS studies. The greatest sorption capacity, combined with reduction-coupled removal phenomenon, has been achieved for gold (5.5 mmol AuÁg 21 at 98C). Executed SEM and XRD analyzes prove formation of gold single crystals during present process, furthermore reduction of rhenium is indicated by XPS analysis. Based on the obtained FTIR and Raman's spectra, the reduction phenomenon is probably followed by resins' functional groups oxidation.

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Section: Resultsmentioning

confidence: 99%

Spontaneous formation of gold microplates during reduction‐coupled removal of noble metals using Dowex M4195 resin

Jermakowicz-Bartkowiak

Cyganowski

Leśniewicz

et al. 2015

J of Applied Polymer Sci

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“…This increasing price of gold with its ever increasing demand is not only due to the jewelry values but also due to the vast application of gold in various high-tech industries (Aworn et al 2005;Xiong et al 2009;Adhikari et al 2007;Yap and Mohamed 2007;Kwak et al 2010;Ha et al 2010) for its unique physical and chemical characteristics (Senturk et al 2007). In recent years, the manufacturing of electronic and electrical devices is a major demand sector for precious metals (Chancerel et al 2009) like gold.…”

Section: Introductionmentioning

confidence: 98%

Selective recovery of gold(III) using cotton cellulose treated with concentrated sulfuric acid

et al. 2011

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Novel utilization of cotton cellulose was developed by chemically modifying with concentrated sulfuric acid to prepare a novel kind of adsorption gel for gold. The adsorption behaviors of the gel were investigated for various metals from acidic chloride media. The gel was found to be highly selective for Au(III) over other precious and base metals tested over the whole concentration range of hydrochloric acid. The maximum adsorption capacity for Au(III) was evaluated as 6.21 mmol/g at 303 K. The amount of adsorbed Au(III) was increased with increasing temperature. A kinetic study for the adsorption of Au(III) at various temperatures confirmed the endothermic adsorption process following pseudo-first order kinetics. The activation energy was evaluated as 78.8 kJ/mol. Interestingly, it was found that the adsorbed Au(III) was reduced to elemental form which was evidenced by the clearly visible elemental gold particles which was further confirmed by means of the X-ray diffraction spectrum and optical microscope image of the gel after the adsorption of Au(III). The mechanism of Au(III) adsorption on the cotton gel and its reduction to elemental gold was proved from the results of IRspectra. The main mechanism could be explained in terms of the coordination of Au(III) to oxygen atom of C-O-C linkage of cross linked cotton gel and to the oxygen atoms of the hydroxyl groups at C 2 and C 3 atoms of pyranose ring of cotton cellulose followed by the reduction to metallic gold. The adsorbed gold in the cotton gel can easily be recovered by incineration.

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“…[1,2]. With the growing demand of gold and reducing amount of its nature resource, it is of vital importance to recover and separate gold from primary resources (ores) and the increasing secondary resources (e-waste and electroplating wastewater) [3].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Au(III) by radiation synthesized aminomethyl pyridine functionalized adsorbents based on cellulose

Dong

Liu

Yuan

et al. 2016

Chemical Engineering Journal

146

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Sequential process of sorption and incineration for recovery of gold from cyanide solutions: Comparison of ion exchange resin, activated carbon and biosorbent

Cited by 52 publications

References 21 publications

Spontaneous formation of gold microplates during reduction‐coupled removal of noble metals using Dowex M4195 resin

Spontaneous formation of gold microplates during reduction‐coupled removal of noble metals using Dowex M4195 resin

Selective recovery of gold(III) using cotton cellulose treated with concentrated sulfuric acid

Recovery of Au(III) by radiation synthesized aminomethyl pyridine functionalized adsorbents based on cellulose

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