Hydrometallurgical Methods for Extracting Non-ferrous Metals from Electronic Gadgets
Shoshay Z. Sapinov R.V. Sadenova M.A. Varbanov P.S.
2021Italian Association of Chemical Engineering - AIDIC
Chemical Engineering Transactions
2021#88139 - 144 pp.
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.
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Center of Excellence «Veritas», D. Serikbayev East Kazakhstan Technical University, 19 Serikbayev str., Ust-Kamenogorsk, 070000, Kazakhstan
Sustainable Process Integration Laboratory, Researcher NETME CENTRE, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, Brno, 616 00, Czech Republic
Center of Excellence «Veritas»
Sustainable Process Integration Laboratory
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026