Recovery of gold ions from wastewater using a three-compartment electrodialysis separation system

Rezaei, Homa; Abdollahi, Hadi; Ghassa, Sina

doi:10.1007/s13762-023-04870-4

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…In this circumstance, a high quantity of wastewater containing the gold-cyanocomplexes is generated. Therefore, several processes have been developed and conducted to treat the metal-cyanocomplexes containing wastewater, such as electrolysis 6 , ion exchange 7 , chemical or advanced chemical oxidations 8 , 9 , solvent extraction 10 , 11 , and adsorption 12 , 13 . However, their actual application is strictly restricted by their specific drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient ZnO/WO3 nanocomposites towards photocatalytic gold recovery from industrial cyanide-based gold plating wastewater

Sangkhanak,

Kunthakudee,

Hunsom

et al. 2023

Sci Rep

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Discharging the gold-contained wastewater is an economic loss. In this work, a set of ZnO/WO3 was facile synthesized by hydrothermal method in order to recover gold from the industrial cyanide-based gold plating wastewater by photocatalytic process. Effect of ZnO contents coupled with WO3 was first explored. Then, effects of operating condition including initial pH of wastewater, type of hole scavenger, concentration of the best hole scavenger and photocatalyst dose were explored. A series of experimental results demonstrated that the ZnO/WO3 nanocomposite with 5 wt% ZnO (Z5.0/WO3) depicted the highest photocatalytic activity for gold recovery due to the synergetic effect of oxygen vacancies, a well-constructed ZnO/WO3 heterostructure and an appropriate band position alignment with respect to the redox potentials of [Au(CN)2]− and hole scavengers. Via this ZnO/WO3 nanocomposite, approximately 99.5% of gold ions was recovered within 5 h using light intensity of 3.57 mW/cm2, catalyst dose of 2.0 g/L, ethanol concentration of 20 vol% and initial pH of wastewater of 11.2. In addition, high stability and reusability were observed with the best nanocomposite even at the 5th reuse. This work provides the guidance and pave the way for designing the ZnO/WO3 nanocomposite for precious metal recovery from a real industrial wastewater.

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Section: Introductionmentioning

confidence: 99%

Highly efficient ZnO/WO3 nanocomposites towards photocatalytic gold recovery from industrial cyanide-based gold plating wastewater

Sangkhanak,

Kunthakudee,

Hunsom

et al. 2023

Sci Rep

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show abstract

“…In liquid membranes, carriers in an organic solvent facilitate the transport of ions from one solution to the other [49]. Recently, Rezaei et al [51] proposed electrodialysis to recovery gold from electroplating baths, where gold can be separated from other metals because it forms stable anionic complexes with Cl − .…”

Section: Introductionmentioning

confidence: 99%

Selective Recovery of Silver Ions from Copper-Contaminated Effluents Using Electrodialysis

Zimmermann,

Wahl,

Tekinalp

et al. 2023

Preprint

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Selective recovery of silver ions from copper-contaminated effluents using electrodialysis

Zimmermann,

Wahl,

Tekinalp

et al. 2024

Desalination

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Recovery of gold ions from wastewater using a three-compartment electrodialysis separation system

Cited by 4 publications

References 44 publications

Highly efficient ZnO/WO3 nanocomposites towards photocatalytic gold recovery from industrial cyanide-based gold plating wastewater

Highly efficient ZnO/WO3 nanocomposites towards photocatalytic gold recovery from industrial cyanide-based gold plating wastewater

Selective Recovery of Silver Ions from Copper-Contaminated Effluents Using Electrodialysis

Selective recovery of silver ions from copper-contaminated effluents using electrodialysis

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