Enhancement of leaching copper by organic agents from waste printed circuit boards in a sulfuric acid solution

He, Junguo; Zhang, Mingming; Chen, Hao; Guo, Shulian; Zhu, Lin; Jiang, Xu; Zhou, Kui

doi:10.1016/j.chemosphere.2022.135924

Cited by 11 publications

(3 citation statements)

References 57 publications

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“…This attributes to that increasing c s enhanced H + ions amount per unit volume of the solution. With the same L/S condition, more H + ions would adsorb on the surface of the solid particles and react with the minerals [37] , which improved V leaching rate. Meanwhile, enhancing c s also improved the concentration difference between the mineral particles and the leaching agent, accelerating the internal and external diffusion of reactants [38] .…”

Section: Resultsmentioning

confidence: 99%

A clean and efficient route for extraction of vanadium from vanadium slag by electro-oxidation combined with ultrasound cavitation

Liu,

Duan,

Cai

et al. 2024

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

A clean and efficient route for extraction of vanadium from vanadium slag by electro-oxidation combined with ultrasound cavitation

Liu,

Duan,

Cai

et al. 2024

Ultrasonics Sonochemistry

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“…Besides strong acids, organic solvent systems were 41 Our group recently reported the use of ethylene glycol (EG) as the main solvent for electrochemical leaching and recovery of metals from powdered WPCBs, 42,43 and He et al also has reported that EG could strengthen the stability of H 2 O 2 , which is better for Cu leaching. 44 Although effective and pH-neutral, EG displays relatively high toxicity with a lethal dose (LD) of 1.4−1.6 mL kg −1 ; accidental ingestion of EG could be fatal. 45 In light of this, we explored the application of SE in a chemically benign poly(ethylene glycol) (PEG) to commence simultaneous leaching and recovery of metals from WPCB at below water-boiling temperature and atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Sebastián et al described the Cu electro-crystallization in a DES (eutectic mixture of choline chloride and urea 1:2) . Our group recently reported the use of ethylene glycol (EG) as the main solvent for electrochemical leaching and recovery of metals from powdered WPCBs, , and He et al also has reported that EG could strengthen the stability of H 2 O 2 , which is better for Cu leaching . Although effective and pH-neutral, EG displays relatively high toxicity with a lethal dose (LD) of 1.4–1.6 mL kg –1 ; accidental ingestion of EG could be fatal .…”

Section: Introductionmentioning

confidence: 99%

Chemically Benign Electrometallurgical Treatment of Waste-Printed Circuit Board in Polyethylene Glycol for Metal Recovery

Liu,

Le,

Wang

et al. 2024

ACS Sustainable Resour. Manage.

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The rapid growth of the electronic industry and its high turnover product rate have promoted a surge in e-waste generation. An efficient recycling strategy to recover the metal content from e-waste is essential to developing a sustainable circular economy. Herein, we report a chemically benign and mild electrometallurgical approach to extract and recover the metallic content from real industrial e-waste at room temperature and atmospheric pressure in poly(ethylene glycol) (PEG), a chemically benign solvent commonly used for commodity and medical products. In this system, the metal content from e-waste is electrochemically oxidized to metal ions, which are then deposited in situ on the cathode in the same reaction cell. The reaction extracted over 11 metals from real e-waste samples with good Faradaic efficiency (FE), calculated from the deposited metal, scored as high as 65.1% during the electrolyte reuse trials. Cu was the most abundant metal in the recovered stream. The PEG electrolyte showed great robust properties and can be reused at least six times with no sign of composition change. Moreover, each trial improved Cu recovery selectivity for the subsequent trial as the carried-over Cu 2+ contributed positively to its depositions�the Cu selectivity almost doubled from 25.9% to 45.2% after the electrolyte was reused six times. The influence of different e-waste abundant metals on Cu's recovery rate was also examined. It was discovered that Al and Fe have a strong influence, but Sn does not. We also examined the recovery of precious metals Au, Ag, and Pd and observed Au recovered well with an excellent FE at 89.37%, but Ag and Pd could not be recovered efficiently due to their precipitations. In summary, the PEG electrolyte system offered a robust, safe, and mild electrochemical strategy to recover valuable metals from industrial e-waste.

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Circular economy approaches for water reuse and emerging contaminant mitigation: innovations in water treatment

Das,

Singh,

Sodhi

et al. 2023

Environ Dev Sustain

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Enhancement of leaching copper by organic agents from waste printed circuit boards in a sulfuric acid solution

Cited by 11 publications

References 57 publications

A clean and efficient route for extraction of vanadium from vanadium slag by electro-oxidation combined with ultrasound cavitation

A clean and efficient route for extraction of vanadium from vanadium slag by electro-oxidation combined with ultrasound cavitation

Chemically Benign Electrometallurgical Treatment of Waste-Printed Circuit Board in Polyethylene Glycol for Metal Recovery

Circular economy approaches for water reuse and emerging contaminant mitigation: innovations in water treatment

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