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Metals 2017, 7(2), 55; doi:10.3390/met7020055

Urban Mining and Electrochemistry: Cyclic Voltammetry Study of Acidic Solutions from Electronic Wastes (Printed Circuit Boards) for Recovery of Cu, Zn, and Ni

Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca—Tulancingo km. 4.5, Mineral de la Reforma, Hidalgo C.P. 42184, México
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Received: 30 November 2016 / Accepted: 6 February 2017 / Published: 13 February 2017
(This article belongs to the Special Issue Valuable Metal Recycling)
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Abstract

We report potentiodynamic studies to characterize copper, nickel and zinc leaching solutions from electronic waste. The metals were leached using oxygen and sulfuric acid (pH = 1.5). As is known, reduction potentials are determined using thermodynamics laws, and metal recovery strategies from electronic waste are usually considered according these thermodynamic values. Pourbaix‐type diagrams are not appropriate to plan strategies in electrochemical processing. Therefore, knowledge of electrode potentials for the metal deposit/dissolution process is the basis for the selective recovery planning. For this reason, potentiodynamic studies, specifically cyclic voltammetry, are revealed as a good way to decide the best conditions for the process of electrochemical recovery of metals from electronic waste, which is also cost‐efficient and has no interference from strange ions, such as lead, in this case. View Full-Text
Keywords: urban  mining;  leaching  solutions;  printed  circuit  boards;  electronic  waste;  electrochemical recovery; cyclic voltammetry urban  mining;  leaching  solutions;  printed  circuit  boards;  electronic  waste;  electrochemical recovery; cyclic voltammetry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Reyes‐Valderrama, M.I.; Salinas‐Rodríguez, E.; Montiel‐Hernández, J.F.; Rivera‐Landero, I.; Cerecedo‐Sáenz, E.; Hernándezvila, J.; Arenas‐Flores, A. Urban Mining and Electrochemistry: Cyclic Voltammetry Study of Acidic Solutions from Electronic Wastes (Printed Circuit Boards) for Recovery of Cu, Zn, and Ni. Metals 2017, 7, 55.

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