| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Legeai, Sophie
Université de Lorraine
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Propylene glycol-based deep eutectic solvent as an alternative to Ethaline for electrometallurgycitations
- 2024Propeline: a green alternative to Ethaline for electrometallurgy of precious metals ? ; Propeline: a green alternative to Ethaline for electrometallurgy of precious metals ?: The economical viability of WEEE (Waste from Electrical and Electronic Equipment) recycling is mainly based on the recovery of copper and precious metals. In this context, we aim at developing a green process for the recovery of silver, palladium, and gold from rich printed-circuit boards (cell phones, labtops…). The recovery will be conducted after the necessary stages of non-metallic materials removal and the beneficiation of less precious metals such as copper and nickel, carried out by Terra Nova Development (TND), our industrial partner.The process envisaged is based on electrometallurgy in “Deep eutectic solvents” (DES), a technology that can be considered as green alternative to conventional hydrometallurgy for precious metals recovery. Indeed, DES have a low reactivity and volatility, making them far less noxious to environment than corrosive liquors employed in conventional processes (cyanides, aqua regia). In particular, the DES named Ethaline (choline chloride-ethylene glycol mixture) has been widely used in electrometallurgy, because of its acceptable viscosity and the presence of substantial Cl- concentration leading to a high solubility of numerous metallic compounds. However, if choline chloride (ChCl) can be considered as a “green” reactant, ethylene glycol (EG) is known to be harmful to men and animals in case of repeated exposure or inhalation periods. Comparable DES with a lower toxic nature than Ethaline can be obtained by replacing EG by other glycols e.g. propylene glycol (PG), widely used in cosmetics and pharmacology, with costs comparable to those of EG: The resulting DES is named Propeline. We will present the potential of this less known DES in the recovery of precious metals. Because the change in the hydrogen bond donor with PG leads to a modification of the DES bulk properties, the first part of this work deals with the determination of Propeline density, viscosity, conductivity and electrochemical stability, which are properties of interest for electrochemical processes. The influence of water content on these properties was thoroughly investigated. Values of the above property parameters are compared to those obtained with Ethaline as a reference DES. In a second part, we will present the performances of Propeline for the electrochemical leaching of Ag, Pd and Au. The performance of Propeline in leaching was evaluated in ambient atmosphere, i.e. in the presence of water at percent levels. Leaching efficiencies could be studied after thorough development of analytical procedures dedicated to elemental analysis e.g. ICP-EOS in DES. The speciation of leached metals was determined by use of cross-linked analysis, namely UV-vis, and EXAFS/XANES spectroscopic techniques, in both cases with comparison with those in Ethaline. Systems (leached metal species-DES) were then thoroughly studied by electrochemical methods. In particular, diffusion coefficients of the solvated metal species were determined by electrochemical transient and stationary techniques, in the aim of leached metal recovery by electrochemical deposition.
- 2024Electroleaching and electrodeposition of silver in ethaline 1 : 2 and propeline 1 : 3: transport properties and electrode phenomena†
- 2023Propeline: a green alternative to Ethaline for electrochemical recovery of precious metals
- 2023Propeline : a new candidate for precious metal recovery 3rd International Meeting on Deep Eutectic Systems, Lisbonne, 19-22 juin 2023
- 2022Coupling electrochemical leaching and electrodeposition in ionic solvents for critical and precious metals recovery
- 2021Mass transport in Ionic Solvents during electrodeposition of gold and palladium
- 2021Electrochemical recovery of precious metals in Ionic Liquid mixtures or Deep Eutectic Solvents
- 2018Recovery of Metals from Secondary Raw Materials by Coupled Electroleaching and Electrodeposition in Aqueous or Ionic Liquid Mediacitations
- 2018Recycling of WEEE ...... we do not stop progress!
- 2017Electrochemical recovery of platinum from spent proton exchange membrane fuel cells using ionic liquid melts
- 2016Tuning the morphology of Te 1D nanostructures by template-free electrochemical deposition in an ionic liquid
- 2015Electrosynthesis of self-standing single crystalline Te nanostructures in an ionic liquid
- 2014Indium recovery by coupling liquid-liquid extraction and electrodeposition in ionic liquids
- 2014Electrodeposition of stoichiometric bismuth telluride Bi2Te3 using a piperidinium ionic liquid binary mixturecitations
- 2012Auto-supported Te nanowires synthesis by template-free electrodeposition from a piperidinium ionic liquid
- 2012Template-free electrodeposition of Te nanowires in a piperidinium-based ionic liquid
- 2011New insight into indium electrochemistry in a Tf2N-based room-temperature ionic liquidcitations
- 2006A copper bismuth film electrode for adsorptive cathodic stripping analysis of trace nickel using square wave voltammetrycitations
- 2005Economic bismuth-film microsensor for anodic stripping analysis of trace heavy metals using differential pulse voltammetry.citations
Places of action
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document
Propeline : a new candidate for precious metal recovery 3rd International Meeting on Deep Eutectic Systems, Lisbonne, 19-22 juin 2023
Abstract
Nowadays, the recovery of precious metals (Ag, Au, Pd...) is mainly carried out using pyro- or hydrometallurgical processes consisting of numerous steps which generate a lot of waste products. In particular, due to the use of toxic compounds e.g. cyanides with strong complexing properties, these wastes require additional specific treatments before their disposal. For the sake of greener processes, ionometallurgy appears an attractive alternative. Indeed, this route uses ionic solvents with high complexing and conductive properties in addition to being thermally (low volatility) and electrochemically stable (working in a wide range of potential). This last criterion is very important here with the use of a single electrochemical cell allowing electro-leaching at the anode and electro-deposition at the cathode, to recover precious metals e.g. Au, Pd and Ag from electronic waste. Previous work on this subject revealed the effectiveness of a 1:2 mixture of choline chloride (ChCl) (hydrogen bond acceptor) with ethylene glycol (EG) (hydrogen bond donor), called ethaline (ET). Thus, from these first encouraging results and to make the process greener, this work focuses on the substitution of EG by propylene glycol (PG), another hydrogen bond donor of similar structure but far less toxic, actually used in cosmetics and pharmaceuticals. The mixture of PG and ChCl is called propeline (PROP). Bulk properties of PROP required in the electrochemical process, density, viscosity, conductivity, electrochemical stability have been determined. Then, PROP and ET were compared when used in the electrochemical cell, indicating comparable performance in the leaching of Au, Ag and Pd. An analytical method for elemental analysis by ICP-OES in leachates was developed for this purpose. Furthermore, metal speciation in the PROP- or ET leachates by spectroscopic methods such as UV-Vis, and EXAFS/XANES at SOLEIL facility was shown very similar. Finally, the electrochemical deposition step was evaluated by the electrochemical determination of kinetic parameters and the diffusion coefficients of the electroactive metal species of the above determined chemical nature.This work was funded by ANR within EE4Precious project ANR-20 –CE08-0035-01