2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 3. Gaune-Escard Intl. Symp. / Molten Salt and Ionic Liquid

Editors:Kongoli F, Fehrmann R, Gadzuric S, Gong W, Seddon KR, Malyshev V, Iwata S
Publisher:Flogen Star OUTREACH
Publication Year:2017
Pages:151 pages
ISBN:978-1-987820-65-2
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Anodic Dissolution and Recovery of Gold and Silver from Waste Electronic Equipment by Using Ionic Liquids

    Ana-Maria Julieta Popescu1; Virgil Constantin1; Cristina Donath1; Elena Ionela Neacsu1; Vasile Soare2; Marian Burada2; Ionut Constantin2; Marcelle Gaune-Escard3;
    1ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, Bucharest, Romania; 2NATIONAL R&D INSTITUTE FOR NONFERROUS AND RARE METALS - IMNR, Pantelimon, Romania; 3POLYTECH, Marseille, France;
    Type of Paper: Regular
    Id Paper: 102
    Topic: 13

    Abstract:

    Waste electric and electronic equipment (WEEE) are an important secondary source of rare and precious metals and their processing through ecological technologies constitutes a major concern in the European Union and contributes significantly to the reduction of environmental pollution and to the preservation of valuable resources of precious metals.
    The present work describes the application of ionic liquids (ILs) to selective dissolution and recovery of Au and Ag from the anodic slime obtained by a triple anodic dissolution of cast WEEE. The ionic liquid used (DES type) was choline chloride-ethylene glycol (molar ratio 1:2) at room temperature (250C) and iodine (in a concentration of 0.2 mol dm1) was used as a catalytic agent. The deposition potentials for Au and Ag were determined by cyclic voltammetry. By anodic dissolution and electrodeposition from the cast WEEE we obtained black gold and gray silver deposits. The SEM and EDX analyses reveal that cathodic deposition of >98% for both Au and Ag. This work demonstrates that ILs could be a solution to the selective recovery of precious metals from WEEE.

    Keywords:

    Electrodeposition; precious metals recovery from WEEE; ionic liquids; SEM;

    Cite this article as:

    Popescu A, Constantin V, Donath C, Neacsu E, Soare V, Burada M, Constantin I, Gaune-Escard M. (2017). Anodic Dissolution and Recovery of Gold and Silver from Waste Electronic Equipment by Using Ionic Liquids. In Kongoli F, Fehrmann R, Gadzuric S, Gong W, Seddon KR, Malyshev V, Iwata S (Eds.), Sustainable Industrial Processing Summit SIPS 2017 Volume 3. Gaune-Escard Intl. Symp. / Molten Salt and Ionic Liquid (pp. 83-84). Montreal, Canada: FLOGEN Star Outreach