A new environmentally friendly process for the recovery of gold from electronic waste |
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| Authors: | Luisa Barbieri Roberto Giovanardi Isabella Lancellotti Marco Michelazzi |
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| Institution: | (1) Department of Material Engineering, University of Modena and Reggio Emilia, via Vignolese 905, 41100 Modena, Italy; |
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| Abstract: | A new method for the recovery of precious metals, in particular gold, from electronic waste is proposed. This work focused
on the research of an easily renewable etching agent, in order to make an environmentally friendly process possible. Two well
known hydrometallurgical etching agents, FeCl3 and CuCl2, were evaluated in terms of efficiency and kinetics, testing solutions with different concentration of etchant and hydrochloric
acid. The recovery of spent etching solutions was evaluated: promising results were found in the case of CuCl2, which can be completely restored by oxidation of the cuprous chloride formed during the etching using atmospheric oxygen. |
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