2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 7: Ionic Liquids & Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Mauntz M, Rubinstein J, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 310 pages |
| ISBN: | 978-1-987820-30-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Preliminary Study For Copper And Tin Recovery In Weee Leachate By Using Ionic Liquids Based On Choline Chloride
Ana-Maria Julieta Popescu1; Virgil Constantin2; Cristina Donath1; Elena Ionela Neacsu2; Vasile Soare3; Marcelle Gaune-Escard4;1ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, LABORATORY OF MOLTEN SALTS, Bucharest, Romania; 2ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, Bucharest, Romania; 3NATIONAL R&D INSTITUTE FOR NONFERROUS AND RARE METALS - IMNR, Pantelimon, Romania; 4ECOLE POLYTECHNIQUE, IUSTI, UNIVERSITE DE PROVENCE, Marseille, France;
Type of Paper: Regular
Id Paper: 90
Topic: 13
Abstract:
The rapid development of the global economy and intense use of electric and electronic equipment lead to the increase of the waste quantity (WEEE). Due to their high toxicity, these materials have become one of the major environmental risks. The necessity for the treatment of WEEE results from the large quantities generated and the content of valuable metals (as Cu, Sn, Zn, Pb et all.). Globally, the recovery of WEEE contained metals is a subject which has generated numerous studies, leading to the development of some technologies based on combining the classical pyro- and hydrometallurgical methods, specific for obtaining metals. Since copper and tin are important metals for industries, the development of Cu, Sn recycling processes is an important issue. The aim of this paper is to recover Cu and Sn by using from the multicomponent alloy obtained by pyro-metalurgic technology from WEEE. We aim to develop a novel ecological technology for the recovery of metals from WEEE by leaching and electrodeposition using ionic liquids based on choline chloride (ChCl). In order to obtain the leaching state, we used mixtures of ChCl-X (X=Urea, Malonic acid and CuCl2i�2H2O). Metallic copper and tin were then electrowon from the ionic liquids in the electrowinning stage. It was found that the peak potentials for Cu and Sn ions reduction are very similar using either Pt or glassy carbon as counter electrode. The electrochemical study allowed determining the mechanism for Cu2+ and Sn2+ reduction in ChCl-A ionic liquids, which appears to be a two steps mechanism for copper probably involving copper chloride complex and a one step mechanism for tin. Finally, the obtained metallic deposits on the Cu anode were the subject of determination of XRD, SEM and XPS in order to be sure of the deposits structure. <br />Key words: metals recovery from WEEE, ionic liquids
Keywords:
Electrochemical; Electrodeposition; Metals;References:
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