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Développement d’outils microfluidiques pour l’analyse et la récupération de métaux précieux issus du retraitement des déchets électroniques

Abstract : Analytical sciences are increasingly associated with sustainable production objectives through two approaches: the characterization of products and processes before and after a recycling process, and the development of new green analytical recycling methodologies for their recovery. In particular, waste electrical and electronic equipment (WEEE) is nowadays considered as urban mines because of its composition, rich in metallic species of interest. For the latter, there are different methods of analysis, before and after recycling, using conventional technologies (ICP-AES, ICP OES, XRD, X-ray fluorescence). In this work, we propose to make an innovative contribution in this field by developing a lab-on-a-chip implementing the coupling between electrophoretic separation and amperometric detection. Compared to existing technologies, this type of device will serve not only as an analytical tool for real-time monitoring of an industrial recycling process, but also as a recycling tool with the potential recovery of precious metals (Platinum, Palladium and Gold) in solid form by electrochemical depletion. The development of a recovery strategy was thus explored, thanks to the integration of composite microelectrodes for the detection of precious metals from acid leachate within a reversible microsystem with multiple advantages compared to conventional microsystems. Such a flow system has been adapted for metal recovery with rates close to 80%.
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Jérémie Gouyon. Développement d’outils microfluidiques pour l’analyse et la récupération de métaux précieux issus du retraitement des déchets électroniques. Autre. Université Paris sciences et lettres, 2019. Français. ⟨NNT : 2019PSLEC009⟩. ⟨tel-02879859⟩

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