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Sequential Selective Dissolution of Coinage Metals in Recyclable Ionic Media.
Zupanc, Anze; Install, Joseph; Weckman, Timo; Melander, Marko M; Heikkilä, Mikko J; Kemell, Marianna; Honkala, Karoliina; Repo, Timo.
Afiliación
  • Zupanc A; Department of Chemistry, Faculty of Science, University of Helsinki, A. I. Virtasen aukio 1, 00014, Helsinki, Finland.
  • Install J; Department of Chemistry, Faculty of Science, University of Helsinki, A. I. Virtasen aukio 1, 00014, Helsinki, Finland.
  • Weckman T; Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
  • Melander MM; Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
  • Heikkilä MJ; Department of Chemistry, Faculty of Science, University of Helsinki, A. I. Virtasen aukio 1, 00014, Helsinki, Finland.
  • Kemell M; Department of Chemistry, Faculty of Science, University of Helsinki, A. I. Virtasen aukio 1, 00014, Helsinki, Finland.
  • Honkala K; Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
  • Repo T; Department of Chemistry, Faculty of Science, University of Helsinki, A. I. Virtasen aukio 1, 00014, Helsinki, Finland.
Angew Chem Int Ed Engl ; 63(31): e202407147, 2024 Jul 29.
Article en En | MEDLINE | ID: mdl-38742485
ABSTRACT
Coinage metals Cu, Ag, and Au are essential for modern electronics and their recycling from waste materials is becoming increasingly important to guarantee the security of their supply. Designing new sustainable and selective procedures that would substitute currently used processes is crucial. Here, we describe an unprecedented approach for the sequential dissolution of single metals from Cu, Ag, and Au mixtures using biomass-derived ionic solvents and green oxidants. First, Cu can be selectively dissolved in the presence of Ag and Au with a choline chloride/urea/H2O2 mixture, followed by the dissolution of Ag in lactic acid/H2O2. Finally, the metallic Au, which is not soluble in either solution above, is dissolved in choline chloride/urea/Oxone. Subsequently, the metals were simply and quantitatively recovered from dissolutions, and the solvents were recycled and reused. The applicability of the developed approach was demonstrated by recovering metals from electronic waste substrates such as printed circuit boards, gold fingers, and solar panels. The dissolution reactions and selectivity were explored with different analytical techniques and DFT calculations. We anticipate our approach will pave a new way for the contemporary and sustainable recycling of multi-metal waste substrates.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2024 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2024 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Alemania