The Adsorption Behaviors of Gold Ions in Simulated Leachate Using Magnetite

Oh, Jumi; Yoo, Kyoungkeun; Bae, Mooki; Kim, Sookyung; Alorro, Richard Diaz

doi:10.32390/ksmer.2019.56.1.079

Cited by 6 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…It has been reported that the leaching efficiency of Sb is lower or slower than Cu [26], and that the solubility of Sb is low in sulfuric acid [20]. Therefore, Sb should be dissolved to enhance the leaching efficiency of Cu, so hydrochloric acid leaching tests were performed because chloride ion could make complex ions with metal, thus enhancing the solubility of the metal [27]. Leaching tests of the speiss at agitation speeds in the range of 200−800 rpm were performed to investigate the effect of the liquid film boundary diffusion surrounding the particles on the leaching efficiency of Cu and Sb in 1 mol/L HCl at 90 °C with 1% pulp density and 1000 cc/min O2.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Hydrochloric Acid Leaching Behaviors of Copper and Antimony in Speiss Obtained from Top Submerged Lance Furnace

Chae

Yoo

Tabelin

et al. 2020

Metals

Self Cite

View full text Add to dashboard Cite

Copper (Cu) has been recovered from speiss generated from top submerged lance furnace process, but it was reported that the leaching efficiency of Cu in sulfuric acid solution decreased with increasing antimony (Sb) content in the speiss. Scanning electron microscopy (SEM)–energy-dispersive X-ray spectroscopy (EDS) results indicate that Sb exists as CuSb alloy, which would retard the leaching of Cu. Therefore, hydrochloric acid leaching with aeration was performed to investigate the leaching behaviors of copper and antimony. The leaching efficiency of Cu increased with increasing agitation speed, temperature, HCl concentration, and the introduction ratio of O2, but also with decreasing pulp density. The leaching efficiency of Cu increased to more than 99% within 60 min in 1 mol/L HCl solution at 600 rpm and 90 °C with 10 g/L pulp density and 1000 cc/min O2. The leaching efficiency of Sb increased and then decreased in all 1 mol/L HCl leaching tests, and precipitate was observed in the leach solution, which was determined to be SbOCl or Sb2O3 by XRD analyses. However, in 2 mol/L–5 mol/L HCl solutions, the leaching efficiency of Sb increased to more than 95% (about 900 mg/L) and remained, so more than 2 mol/L HCl could stabilize Sb ion in the HCl solution.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hydrochloric Acid Leaching Behaviors of Copper and Antimony in Speiss Obtained from Top Submerged Lance Furnace

Chae

Yoo

Tabelin

et al. 2020

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Magnetite powder was selected to adsorb copper ions over gold ions. Magnetite (Fe 3 O 4 ) consists of Fe 2+ and Fe 3+ O 4 2− , so, when noble metal ions approach the surface of magnetite, electron moves from magnetite, where ferrous oxidizes into ferric ions in the texture, to the noble metal ions [24,25]. Consequently, the noble metal ions could be reduced and adsorbed as elemental metal on the surface of magnetite.…”

Section: Results Presented Inmentioning

confidence: 99%

Destruction of Cyanide and Removal of Copper from Waste Printed Circuit Boards Leach Solution Using Electro-Generated Hypochlorite Followed by Magnetite Adsorption

Bae

Lee

Kim

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

The removal of the cyanide and copper (Cu) from the waste printed circuit boards (WPCBs) cyanide leach solution through the alkaline chlorination using electro-generated hypochlorite (NaOCl) followed by magnetite (Fe3O4) adsorption is investigated. The efficiency of the destruction of cyanide and precipitation of Cu was increased with increasing the concentration of free available chlorine in NaOCl. More than 99% of free cyanide and 76% of Cu were removed under the following conditions: concentration of chlorine in electro-generated NaOCl, 5.2 g/L; volume ratio of NaOCl/leach solution, 1; pH, ~9.8; ambient temperature for 12 h. Then, magnetite adsorption for selective removal of remaining Cu (50.5 mg/L) was selected and more than 99% of copper ion was successfully removed with dosage 10g/100mL, shaking speed 150 rpm within 30 min. The results revealed that the alkaline chlorination using electro-generated NaOCl followed by magnetite adsorption could completely remove the cyanide and Cu, remaining Au in the final solution.

show abstract

Enhanced cementation of Cd2+, Co2+, Ni2+, and Zn2+ on Al from sulfate solutions by activated carbon addition

et al. 2021

View full text Add to dashboard Cite

The Adsorption Behaviors of Gold Ions in Simulated Leachate Using Magnetite

Cited by 6 publications

References 8 publications

Hydrochloric Acid Leaching Behaviors of Copper and Antimony in Speiss Obtained from Top Submerged Lance Furnace

Hydrochloric Acid Leaching Behaviors of Copper and Antimony in Speiss Obtained from Top Submerged Lance Furnace

Destruction of Cyanide and Removal of Copper from Waste Printed Circuit Boards Leach Solution Using Electro-Generated Hypochlorite Followed by Magnetite Adsorption

Enhanced cementation of Cd2+, Co2+, Ni2+, and Zn2+ on Al from sulfate solutions by activated carbon addition

Contact Info

Product

Resources

About