A review on electrochemical techniques for metal recovery from waste resources

Siwal, Samarjeet Singh; Kaur, Harjot; Deng, Rongrong; Zhang, Qibo

doi:10.1016/j.cogsc.2022.100722

Cited by 20 publications

(10 citation statements)

References 53 publications

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“…One such substance that has 50% cellulose is bagasse. It can be utilized to adsorb Cu(III) and Cu(VI) ions from tannery wastewater in native and immobilized forms 48,49 . The possibility of obtaining cellulose‐enrich compounds from fruit wastes, such as orange bagasse (OB), has also been investigated.…”

Section: Cellulose Extraction Sourcesmentioning

confidence: 99%

Cellulose‐based smart materials: Novel synthesis techniques, properties, and applications in energy storage and conversion devices

Bishnoi,

Siwal,

Kumar

et al. 2024

Electron

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There has been a significant scope toward the cutting‐edge investigations in hierarchical carbon nanostructured electrodes originating from cellulosic materials, such as cellulose nanofibers, available from natural cellulose and bacterial cellulose. Elements of energy storage systems (ESSs) are typically established upon inorganic/metal mixtures, carbonaceous implications, and petroleum‐derived hydrocarbon chemicals. However, these conventional substances may need help fulfilling the ever‐increasing needs of ESSs. Nanocellulose has grown significantly as an impressive 1D element due to its natural availability, eco‐friendliness, recyclability, structural identity, simple transformation, and dimensional durability. Here, in this review article, we have discussed the role and overview of cellulose‐based hydrogels in ESSs. Additionally, the extraction sources and solvents used for dissolution have been discussed in detail. Finally, the properties (such as self‐healing, transparency, strength and swelling behavior), and applications (such as flexible batteries, fuel cells, solar cells, flexible supercapacitors and carbon‐based derived from cellulose) in energy storage devices and conclusion with existing challenges have been updated with recent findings.

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Section: Cellulose Extraction Sourcesmentioning

confidence: 99%

Cellulose‐based smart materials: Novel synthesis techniques, properties, and applications in energy storage and conversion devices

Bishnoi,

Siwal,

Kumar

et al. 2024

Electron

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“…In the adsorption mechanism, toxic pollutants only transfer to the surface of MOFs, and their desorption may result in secondary contaminants . Therefore, for the degradation of pollutants from wastewater, catalysts, oxidizing agents, and some reactants are utilized by sewage treatment plants and factories. − Over the past few years, MOFs have attracted much attention for degrading contaminants from wastewater. In catalytic processes, MOFs are combined with highly reactive species such as sulfate radicals (SO 4 •– ) and hydrogen peroxide (H 2 O 2 ) to promote the oxidation of pollutants into less toxic products. − NbCo-MOF was synthesized to remove tetracycline from wastewater via SO 4 •– oxidation.…”

Section: Mechanism Of Mof-based Materials In the Removal Of Pollutant...mentioning

confidence: 99%

Metal–Organic Framework-Based Materials for Wastewater Treatment: Superior Adsorbent Materials for the Removal of Hazardous Pollutants

et al. 2023

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In previous years, different pollutants, for example, organic dyes, antibiotics, heavy metals, pharmaceuticals, and agricultural pollutants, have been of note to the water enterprise due to their insufficient reduction during standard water and wastewater processing methods. MOFs have been found to have potential toward wastewater management. This Review focused on the synthesis process (such as traditional, electrochemical, microwave, sonochemical, mechanochemical, and continuous-flow spray-drying method) of MOF materials. Moreover, the properties of the MOF materials have been discussed in detail. Further, MOF materials’ applications for wastewater treatment (such as the removal of antibiotics, organic dyes, heavy metal ions, and agricultural waste) have been discussed. Additionally, we have compared the performances of some typical MOFs-based materials with those of other commonly used materials. Finally, the study’s current challenges, future prospects, and outlook have been highlighted.

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“…31 The use of slurry electrolysis (SE) to recover metals from WEEE has been investigated on various metals, including Cu, Fe, Zn, Pb, Ag, Mn, and Au. 32,33 However, conventional SE practice requires a highly acidic, alkaline, or oxidative environment, such as 4 mol L −1 HCl, 34 190 36 1 mol L −1 (NH 4 ) 2 S 2 O 8 , 37 glycine, 38 and some of the mixed ionic liquid solution being used as the electrolyte (H 2 SO 4 and [MIm]HSO 4 ), 39 to facilitate the metal leaching from WPCB composite and prevent the metal ions from precipitating as electrochemically inert metal (hydro)oxide. 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.…”

Section: Introductionmentioning

confidence: 99%

“…Ideally, the process should be powered by electrical energy to be integrated with a renewable energy grid potentially . The use of slurry electrolysis (SE) to recover metals from WEEE has been investigated on various metals, including Cu, Fe, Zn, Pb, Ag, Mn, and Au. , However, conventional SE practice requires a highly acidic, alkaline, or oxidative environment, such as 4 mol L –1 HCl, 190 g L –1 H 2 SO 4 , 30 g L –1 H 2 O 2 , 0.25 mol L –1 (NH 4 ) 2 CO 3 , 4 mol L –1 NH 3 ·H 2 O, 1 mol L –1 (NH 4 ) 2 S 2 O 8 , glycine, and some of the mixed ionic liquid solution being used as the electrolyte (H 2 SO 4 and [MIm]HSO 4 ), to facilitate the metal leaching from WPCB composite and prevent the metal ions from precipitating as electrochemically inert metal (hydro)oxide. Besides strong acids, organic solvent systems were sometimes employed as a medium to induce metal leaching.…”

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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A review on electrochemical techniques for metal recovery from waste resources

Cited by 20 publications

References 53 publications

Cellulose‐based smart materials: Novel synthesis techniques, properties, and applications in energy storage and conversion devices

Cellulose‐based smart materials: Novel synthesis techniques, properties, and applications in energy storage and conversion devices

Metal–Organic Framework-Based Materials for Wastewater Treatment: Superior Adsorbent Materials for the Removal of Hazardous Pollutants

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

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