Publication detail

Hydrometallurgical Methods for Extracting Non-ferrous Metals from Electronic Gadgets

Shoshay, Z. Sapinov, R.V. Sadenova, M.A. Varbanov, P.S.

English title

Hydrometallurgical Methods for Extracting Non-ferrous Metals from Electronic Gadgets

Type

journal article in Scopus

Language

en

Original abstract

This article explores an environmentally friendly method of complex processing of printed circuit boards of cell phones in order to extract gold and other valuable components without cyanides. Thiourea was used as reagents for leaching gold and silver. A nitric acid-based solder solvent was used to separate the electronic components and gold plating from the printed circuit boards. To eliminate the harmful effect of copper on thiourea, the printed circuit boards were not crushed at the gold recovery stage. As a result, Ag 51 % and Au 89 % were extracted at t = 60 °C and a thiourea concentration of 12 g/L. The presented method is environmentally friendly in comparison with cyanide methods of gold recovery and effective in terms of the amount of gold recovery. © 2021, AIDIC Servizi S.r.l.

English abstract

This article explores an environmentally friendly method of complex processing of printed circuit boards of cell phones in order to extract gold and other valuable components without cyanides. Thiourea was used as reagents for leaching gold and silver. A nitric acid-based solder solvent was used to separate the electronic components and gold plating from the printed circuit boards. To eliminate the harmful effect of copper on thiourea, the printed circuit boards were not crushed at the gold recovery stage. As a result, Ag 51 % and Au 89 % were extracted at t = 60 °C and a thiourea concentration of 12 g/L. The presented method is environmentally friendly in comparison with cyanide methods of gold recovery and effective in terms of the amount of gold recovery. © 2021, AIDIC Servizi S.r.l.

Keywords in English

hydrometallurgical; methods; extracting; non-ferrous; metals; electronic; gadgets

Released

15.11.2021

Publisher

Italian Association of Chemical Engineering - AIDIC

ISSN

2283-9216

Number

88

Pages from–to

139–144

Pages count

6

BIBTEX


@article{BUT177028,
  author="Petar Sabev {Varbanov},
  title="Hydrometallurgical Methods for Extracting Non-ferrous Metals from Electronic Gadgets",
  year="2021",
  number="88",
  month="November",
  pages="139--144",
  publisher="Italian Association of Chemical Engineering - AIDIC",
  issn="2283-9216"
}