Electrochemical reclamation of silver from silver-plating wastewater using static cylinder electrodes and a pulsed electric field

Su, Yuanbo; Li, Qingbiao; Wang, Yuanpeng; Wang, Haitao; Huang, Jiale; Yang, Xin

doi:10.1016/j.jhazmat.2009.05.096

Cited by 21 publications

(10 citation statements)

References 29 publications

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“…On the other hand, the cost of nanoparticle production using traditional sources is expected to increase due to the ever-increasing demand of precious metals and depletion of high-grade raw materials. For instance, the consumption of silver has rapidly increased due to its demand in numerous applications like photographic, medical, electrical, electronics, chemical, jewelry, and especially recently solar cells. − In order to obtain silver sources for these industries, hydrometallurgical processes for silver separation by solvent extraction, ion exchange, and sorption and for silver recovery by electrowinning, − chemical reduction, precipitation, and cementation − have all been studied for both primary and secondary raw materials. Nevertheless, application of these methods has become progressively difficult due to the related economic and environmental concerns, like depletion of high-grade raw materials and the increasingly complex feedstocks utilized in silver production.…”

Section: Introductionmentioning

confidence: 99%

Controllable Production of Ag/Zn and Ag Particles from Hydrometallurgical Zinc Solutions

Wang

Hannula

et al. 2021

ACS Sustainable Chem. Eng.

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Ag/Zn and Ag particles have been successfully produced from electrolytes simulating zinc process solutions containing a high zinc concentration (65 g/L) and a negligible silver concentration (0.5–50 ppm) using a facile and sustainable electrodeposition-redox replacement (EDRR) method. Results show that the particle size and chemical composition of the deposited Ag/Zn and Ag particles can be readily controlled by varying the operating parameters such as replacement time and agitation. Electrochemical quartz crystal microbalance (EQCM) studies supported with SEM-EDS and TEM results indicate that the EDRR process consists of three regions: (I) zinc pulse deposition; (II) redox replacement between the Ag+ ions and the deposited Zn, formation of a Zn/Ag alloy structure, and competing Zn oxidation by H+ ions; and (III) further replacement between Ag+ ions and Zn (alloy) formed in the previous stage and possible silver reduction by hydrogen. The Zn (alloy) has a higher reduction potential which hinders the competing H+ reduction and sequentially improves the utilization efficiency of the sacrificial metal (Zn). Furthermore, by using the EDRR method, Ag/Zn particles could be successfully obtained from solutions with an extremely low Ag concentration of 0.5 ppm. The promising results demonstrate the feasibility of producing Ag-based functional materials utilizing trace amounts of Ag from zinc process solutions.

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Section: Introductionmentioning

confidence: 99%

Controllable Production of Ag/Zn and Ag Particles from Hydrometallurgical Zinc Solutions

Wang

Hannula

et al. 2021

ACS Sustainable Chem. Eng.

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“…Hence, it was reported that, in combination with the pulsed current method and the static cylindrical electrodes, most of the silver in electroplating wastewater could successfully be recovered (>99%). Meanwhile, more than 95% of the present cyanide could be removed via the electro-oxidation process at the anode [72,74]. It is also worth noting that the total energy consumption of the pulsed electrodeposition is lower than when using conventional DC methods.…”

Section: Pulsed Current/voltage Electrodepositionmentioning

confidence: 99%

Electrochemical Approaches for the Recovery of Metals from Electronic Waste: A Critical Review

et al. 2021

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Electronic waste (e-waste) management and recycling are gaining significant attention due to the presence of precious, critical, or strategic metals combined with the associated environmental burden of recovering metals from natural mines. Metal recovery from e-waste is being prioritized in metallurgical extraction owing to the fast depletion of natural mineral ores and the limited geographical availability of critical and/or strategic metals. Following collection, sorting, and physical pre-treatment of e-waste, electrochemical processes-based metal recovery involves leaching metals in an ionic form in a suitable electrolyte. Electrochemical metal recovery from e-waste uses much less solvent (minimal reagent) and shows convenient and precise control, reduced energy consumption, and low environmental impact. This critical review article covers recent progress in such electrochemical metal recovery from e-waste, emphasizing the comparative significance of electrochemical methods over other methods in the context of an industrial perspective.

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“…Electrochemical treatment of wastewater containing metal ions is a relatively simple and clean methodology that is attractive due to little sludge production, high selectivity exhibition and low operating costs (Su et al 2009); hence, it has been an interest for several years, and many researchers have tried to overcome the limitations of the process (Dutra et al 2008;Körbahti et al 2011;Melnyk and Goncharuk 2009). This process is limited by several steps (Scott 1995):…”

Section: Introductionmentioning

confidence: 99%

Improvement of cadmium ion electrochemical removal from dilute aqueous solutions by application of multi-stage electrolysis

Baghban

Mehrabani-Zeinabad

Moheb

2014

Int. J. Environ. Sci. Technol.

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Improvement of cadmium ion electrochemical removal from dilute aqueous solutions in a spouted bed reactor was investigated. Enlargement of cathode surface area from 1,000 to 1,500 cm 2 resulted in a decrease of nearly 30 % in both of the process time and the specific energy consumption. Application of a three-stage electrolysis process for a solution containing initial concentration of 270 ppm cadmium ion, resulted in the removal of 99.9 % cadmium ion in 135 min with the specific energy consumption of 2.29 kWh/kg, 23 % less than the value of a single-stage process. For a solution with cadmium ion initial concentration of 180 ppm, 99.9 % of cadmium ion was removed in 135.5 min by application of a two-stage electrolysis process, while the specific energy consumption was 2.82 kWh/kg, 30 % less than that of a single-stage process. For a solution with cadmium ion initial concentration of 90 ppm, 99.5 % of cadmium ion was removed in 100.2 min with the specific energy consumption of 3.78 kWh/kg in a single-stage electrolysis process.

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Electrochemical reclamation of silver from silver-plating wastewater using static cylinder electrodes and a pulsed electric field

Cited by 21 publications

References 29 publications

Controllable Production of Ag/Zn and Ag Particles from Hydrometallurgical Zinc Solutions

Controllable Production of Ag/Zn and Ag Particles from Hydrometallurgical Zinc Solutions

Electrochemical Approaches for the Recovery of Metals from Electronic Waste: A Critical Review

Improvement of cadmium ion electrochemical removal from dilute aqueous solutions by application of multi-stage electrolysis

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