Electrochemical Recovery of Silver from Secondary Raw Materials

Gromov, O. G.; Kuz’min, A. P.; Куншина, Г. Б.; Локшин, Э. П.; Калинников, В. Т.

doi:10.1023/b:rjac.0000024577.90857.07

Cited by 6 publications

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“…In this process, the ions in the solution will migrate to the cathode and form a metallic deposit. The electrowinning is employed to extract metals, such as copper, zinc, nickel, gold, manganese, and cadmium, from their solutions, and various studies indicate that it is an process attractive both economically and environmentally (Carrillo-Abad et al, 2012; Fourcade et al, 2003; Garcia-Gabaldon et al, 2005; Garcia-Gabaldon et al, 2006; Gromov et al, 2004; Kasper et al, 2011b; Peng et al, 2011; Reyes Cruz et al, 2002; Veit et al, 2006; Yap and Mohamed, 2007).…”

Section: Introductionmentioning

confidence: 99%

Determination of the potential gold electrowinning from an ammoniacal thiosulphate solution applied to recycling of printed circuit board scraps

et al. 2015

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The use of electrochemical techniques in the selective recovery of gold from a solution containing thiosulphate, ammonia, and copper, obtained from the leaching of printed circuit boards from mobile phones using ammoniacal thiosulphate, are shown in this work. First, cyclic voltammetry tests were performed to determine the potential of electrodeposition of gold and copper, and then, electrowinning tests at different potentials for checking the rates of recovery of these metals were performed. The results of the cyclic voltammetry show that copper deposition occurs at potentials more negative than -600 mV (Ag/AgCl), whereas the gold deposition can be performed at potentials more positives than -600 mV (Ag/AgCl). The results of electrowinning show that 99% of the gold present in solutions containing thiosulphate and copper can be selectively recovered in a potential range between -400 mV (vs Ag/AgCl) and -500 mV (vs Ag/AgCl). Furthermore, 99% of copper can be recovered in potentials more negative than -700 mV (vs Ag/AgCl).

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Section: Introductionmentioning

confidence: 99%

Determination of the potential gold electrowinning from an ammoniacal thiosulphate solution applied to recycling of printed circuit board scraps

et al. 2015

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“…The obtained silver metal attached as a chain onto the surface of a circular stainless steel material (cathode) during the setup similar to our study. It was revealed that the amount of recovered metal increased with the current applied as the time progressed with its peak at 0.6 A in the time range of 0.25 -1.0 h. Gromov et al [31] studied electrolysis of silver in 84 -95 wt % sulfuric acid with addition of 40 g.l -1 of silver sulphate at electrolyte temperature of 40 °C. They performed a semicommercial tests of the method for electrochemical recovery of silver from silver coatings on copper, brass, aluminium, and steel.…”

Section: Figure 5 Change Of Ag Concentration In Electrolyte Dependent On Operation Timementioning

confidence: 99%

Electrochemical Recovery of Silver Using a Simple Cell

Wachter

Štefko

2021

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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The amount of generated e-waste during the last decades has been steadily raising to the point at which it is highly desirable to obtain the precious metals by recycling the e-waste without the need of exploiting the environment. The rapid development of technology, steep growth of modern facilities with user-friendly electronical devices and a stiff competition between manufacturers are among the main reasons for decreasing the life span of such devices, and subsequently end up as an obsolete waste product. Rapid industrialization and urbanization have also caused many environmental problems, e.g. heavy metal contamination. Silver is one of the precious metals with exceptionally high industrial applications, which makes it an area of research of high interest. Demand for silver continues to grow with progress in the industrialized world, while the world reserves of high-quality silver ores are declining. Although, there are large stocks of low and lean quality silver ores still to be mined, the main goal of this article is to provide a simple, effective and eco-friendly method of silver recovery from e-waste, e.g. electrical circuit breakers using an electrochemical cell. After 20.75 days of the experiment, 1481.5 grams of silver contacts were processed with a final yield of 61.41 % grams of silver dendrite crystals (99.9 % purity).

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“…32 Recently, the cost of silver production increases rapidly with decreasing natural silver resources, but silver has a huge demand for photographs, radiographs, electronics, photonics, catalysts, jewelry, silverware, dental materials, medicines, and disinfectants in wastewater treatment. 33,34 Therefore, the market demand urgently requires the recovery of silver from 1, only lactic acid was detected from the liquid sample by high-performance liquid chromatography (HPLC) analysis when glucose was reacted without Ag 2 O under the basic hydrothermal condition. However, when Ag 2 O was added, the production of FA was clearly increased and the formation of glycolic acid was also detected.…”

Section: Introductionmentioning

confidence: 95%

“…Recently, the cost of silver production increases rapidly with decreasing natural silver resources, but silver has a huge demand for photographs, radiographs, electronics, photonics, catalysts, jewelry, silverware, dental materials, medicines, and disinfectants in wastewater treatment. , Therefore, the market demand urgently requires the recovery of silver from silver-containing wastes through new cost-effective and environmentally friendly technologies . Many researchers studied the methods to recycle silver by chemical reduction, chemical replacement, and ion exchange. − However, these methods were short of economy and environmental friendliness due to the use of expensive resins or high energy input.…”

Section: Introductionmentioning

confidence: 99%

Formation of Formic Acid from Glucose with Simultaneous Conversion of Ag₂O to Ag under Mild Hydrothermal Conditions

Cheng

et al. 2021

ACS Omega

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Formation of formic acid from renewable biomass resources is of great interest since formic acid is a widely used platform chemical and has recently been regarded as an important liquid hydrogen carrier. Herein, a novel approach is reported for the conversion of glucose, the constituent carbohydrate from the cellulose fraction of biomass, to formic acid under mild hydrothermal conditions with simultaneous reduction of Ag 2 O to Ag. Results showed that glucose was selectively converted to formic acid with an optimum yield of 40.7% and glycolic acid with a yield of 6.1% with 53.2% glucose converting to carbon dioxide (CO 2 ) immediately at a mild reaction temperature of 135 °C for 30 min. In addition, Ag 2 O was used as a solid oxidant for glucose oxidation, which avoids the use of traditionally dangerous liquid oxidant H 2 O 2 . Furthermore, complete conversion of Ag 2 O to Ag can be achieved. This study not only developed a new method for value-added chemical production from renewable biomass but also explored an alternative low-carbon and energy-saving route for silver extraction and recovery.

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Electrochemical Recovery of Silver from Secondary Raw Materials

Cited by 6 publications

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Determination of the potential gold electrowinning from an ammoniacal thiosulphate solution applied to recycling of printed circuit board scraps

Determination of the potential gold electrowinning from an ammoniacal thiosulphate solution applied to recycling of printed circuit board scraps

Electrochemical Recovery of Silver Using a Simple Cell

Formation of Formic Acid from Glucose with Simultaneous Conversion of Ag₂O to Ag under Mild Hydrothermal Conditions

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Electrochemical Recovery of Silver from Secondary Raw Materials

Cited by 6 publications

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Determination of the potential gold electrowinning from an ammoniacal thiosulphate solution applied to recycling of printed circuit board scraps

Determination of the potential gold electrowinning from an ammoniacal thiosulphate solution applied to recycling of printed circuit board scraps

Electrochemical Recovery of Silver Using a Simple Cell

Formation of Formic Acid from Glucose with Simultaneous Conversion of Ag2O to Ag under Mild Hydrothermal Conditions

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Product

Resources

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Formation of Formic Acid from Glucose with Simultaneous Conversion of Ag₂O to Ag under Mild Hydrothermal Conditions