Silver Recovery from Photographic Process Wastes

Sathaiyan, N.

doi:10.1016/b978-0-12-803581-8.03653-5

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Incineration or pyrometallurgy is the process in which it is melted to recover silver with the release of toxic gases into the atmosphere and the treatment is claimed to be producing low quality of silver. [33][34][35] Leaching of silver present in X-ray by chemicals like thio/persulfates is carried out in hydrometallurgy, and it is a comparatively safe technique than former process. Silver nanoparticles are synthesized using size reducing agents, namely, ethylene glycol, citrates, and sodium borohydrate.…”

Section: Introductionmentioning

confidence: 99%

“…Recovering of silver from X‐ray films are proceeded by hydrometallurgy and pyrometallurgy processes. Incineration or pyrometallurgy is the process in which it is melted to recover silver with the release of toxic gases into the atmosphere and the treatment is claimed to be producing low quality of silver 33‐35 . Leaching of silver present in X‐ray by chemicals like thio/persulfates is carried out in hydrometallurgy, and it is a comparatively safe technique than former process.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of silver nanoparticle from X‐ray film and its application in production of biofuel from jatropha oil

Ganesan

Narasimhalu

Joice³

et al. 2020

Intl J of Energy Research

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Recycling of waste material and production of biofuels are the thrust areas to modern technology. The basic idea behind this work is to regenerate waste silver from X-ray films and to employ them in biofuel production from jatropha oil. Stable silver nanoparticles (Ag NPs) were prepared using Quercus infectoria (oak gall) and raw Camellia sinensis (tea) extracts. The synthesized materials were characterized by XRD, UV-visible spectra, energy-dispersive X-ray analysis, and Fe-SEM technique. The temperature of the reactions, weight hourly space velocity, and time of reaction decide the yield of biofuel, and the parameters were optimized over Ag NP catalyst. Apart from yield of biofuel, the proportion of gasoline fraction (C5-C9) was also peer monitored. A maximum of 90% conversion of jatropha oil was converted into 85% biofuel with 76% selectivity toward gasoline over Ag NPs. Flash point, fire point, calorific value, cloud point, specific gravity, and viscosity of the gasoline were evaluated and correlated with ASTM D6751 standards.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of silver nanoparticle from X‐ray film and its application in production of biofuel from jatropha oil

Ganesan

Narasimhalu

Joice³

et al. 2020

Intl J of Energy Research

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“…In view of this and that the consumption of electronic equipment has increased the demand for silver, 2,3 it is a matter of importance to carry out the recovery of Ag from this sort of source using environment-friendly processes. [4][5][6] Various waste materials contain significant amounts of Ag, such as industrial wastewater, 7 photographic 8 and electronic 9 wastes and spent SOBCB. 10 The cathode of these batteries is formed by a mix of Ag 2 O and metallic Ag, which is formed as result of the overall reaction, Ag 2 O (s) + Zn 0 (s) → 2Ag 0 (s) + ZnO (s) .…”

mentioning

confidence: 99%

A Deep Eutectic Solvent as Leaching Agent and Electrolytic Bath for Silver Recovery from Spent Silver Oxide Batteries

Sánchez-Ortiz

Aldana-González

Manh

et al. 2021

J. Electrochem. Soc.

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It is shown for the first time that the deep eutectic solvent, DES, formed by acetylcholine chloride and urea can be successfully used for Ag recovery from the cathode powder of spent silver oxide batteries. This DES performs two important functions namely, as selective leaching liquor to extract Ag(I) ions from the remaining Ag2O, leaving intact the metallic Ag in the solid phase, and as electrolytic bath for silver electrodeposition onto a glassy carbon electrode or graphite. Using potentiodynamic and potentiostatic electrochemical measurements, it was possible to quantify both: the Ag(I) leaching rate and the concentration of Ag(I) ions leached after 24 h. From this value, it was possible to estimate that about 7% of the original mass of the cathode powder corresponds to Ag2O and the rest to metallic Ag. Moreover, from potentiostatic current density transients, recorded during Ag electrodeposition, it was shown, for the first time in this DES, that this process occurs via multiple 3D nucleation with diffusion-controlled growth and valuable practical information i.e. the diffusion coefficient of Ag(I) ions in this media was quantified. From scanning electron microscopy images and energy-dispersive X-ray spectroscopy, the morphology and composition of the resulting deposits were characterized.

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Silver production from spent zinc–silver oxide batteries via leaching–cementation technique

Javanshir

Qashoqchi

Mofrad

2020

Separation Science and Technology

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Silver Recovery from Photographic Process Wastes

Cited by 3 publications

References 4 publications

Synthesis of silver nanoparticle from X‐ray film and its application in production of biofuel from jatropha oil

Synthesis of silver nanoparticle from X‐ray film and its application in production of biofuel from jatropha oil

A Deep Eutectic Solvent as Leaching Agent and Electrolytic Bath for Silver Recovery from Spent Silver Oxide Batteries

Silver production from spent zinc–silver oxide batteries via leaching–cementation technique

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