Recyclage métaux et terres rares
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recyclage des métaux et terres rares
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Critical Materials Recovery from Solutions and Wastes: Retrospective and Outlook - Environmental Science & Technology (ACS Publications)

Critical Materials Recovery from Solutions and Wastes: Retrospective and Outlook - Environmental Science & Technology (ACS Publications) | Recyclage métaux et terres rares | Scoop.it
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Battery related cobalt and REE flows in WEEE treatment

Highlights

 Resource potential of WEEE batteries lost due to non-collection.

WEEE batteries have high relevance for cobalt recycling.

Rare earth elements are presently not recycled from NiMH batteries due to economic barriers.

Battery chemistry specific sorting will enable future recycling.

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Métaux stratégiques et économie circulaire

Métaux stratégiques et économie circulaire | Recyclage métaux et terres rares | Scoop.it
Depuis le big-bang, le monde est une transition permanente : démographique, énergétique, géopolitique, industrielle. Les mines ont suivi ces...
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Preparation of fine fiberglass-resin powders from waste printed circuit boards by different milling methods for reinforcing polypropylene composites - Yang - 2015 - Journal of Applied Polymer Scien...

Preparation of fine fiberglass-resin powders from waste printed circuit boards by different milling methods for reinforcing polypropylene composites - Yang - 2015 - Journal of Applied Polymer Scien... | Recyclage métaux et terres rares | Scoop.it
ABSTRACT

In this study, different milling methods were used to prepare fine fiberglass-resin powders (FRP) from waste printed circuit boards for the sake of obtaining high-performance polypropylene (PP)/FRP composite. The processability and appearance of composites can be greatly improved through further milling of FRP; smaller average particle size and narrower particle size distribution can be obtained by pan milling as compared with jet milling and planetary ball milling. Mechanical test results showed that fine FRP prepared by pan milling could be used as reinforcing fillers in the PP composites and possessed better mechanical properties than other two milling methods. The mechanical properties was also confirmed by scanning electron microscopy studies which indicated that the dispersion of FRP and interfacial adhesion between fiberglass and PP matrix was much better by pan milling. Meanwhile, the heterogeneous nucleation effect of FRP by pan milling was more obvious. The above results indicate that solid-state shear is a new method for producing fine FRP and high-performance PP composites filled with FRP. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42494.

 

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Matieres premieres - Le Cyclope sonne le glas - Recyclage Récupération

Matieres premieres - Le Cyclope sonne le glas - Recyclage Récupération | Recyclage métaux et terres rares | Scoop.it
Informations sur l'environnement pour l'ensemble des professionnels du secteur, pr�sentation des revues du groupe Victoires Editions
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The Global Anthropogenic Gallium System: Determinants of Demand, Supply and Efficiency Improvements - Environmental Science & Technology (ACS Publications)

The Global Anthropogenic Gallium System: Determinants of Demand, Supply and Efficiency Improvements - Environmental Science & Technology (ACS Publications) | Recyclage métaux et terres rares | Scoop.it

Gallium has been labeled as a critical metal due to rapidly growing consumption, importance for low-carbon technologies such as solid state lighting and photovoltaics, and being produced only as a byproduct of other metals (mainly aluminum). The global system of primary production, manufacturing, use and recycling has not yet been described or quantified in the literature. This prevents predictions of future demand, supply and possibilities for efficiency improvements on a system level. We present a description of the global anthropogenic gallium system and quantify the system using a combination of statistical data and technical parameters. We estimated that gallium was produced from 8 to 21% of alumina plants in 2011. The most important applications of gallium are NdFeB permanent magnets, integrated circuits and GaAs/GaP-based light-emitting diodes, demanding 22–37%, 16–27%, and 11–21% of primary metal production, respectively. GaN-based light-emitting diodes and photovoltaics are less important, both with 2–6%. We estimated that 120–170 tons, corresponding to 40–60% of primary production, ended up in production wastes that were either disposed of or stored. While demand for gallium is expected to rise in the future, our results indicated that it is possible to increase primary production substantially with conventional technology, as well as improve the system-wide material efficiency.

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Terres rares : les défis à relever pour éviter la pénurie

Terres rares : les défis à relever pour éviter la pénurie | Recyclage métaux et terres rares | Scoop.it
Grâce au recyclage, à l'écoconception et à l'exploitation de nouveaux gisements miniers, l'approvisionnement en terres rares devrait être globalement assuré en Europe à l'horizon 2020, conclut le projet de recherche Aster, après trois ans de travaux.
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Process development for recovery of vanadium and nickel from an industrial solid waste by a leaching–solvent extraction technique

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Vers un meilleur recyclage des panneaux photovoltaïques usagés | ETI Construction

Vers un meilleur recyclage des panneaux photovoltaïques usagés | ETI Construction | Recyclage métaux et terres rares | Scoop.it

Récemment, Schott Solar AG, le spécialiste des technologies du solaire, a signé un nouvel accord avec PV Cycle concernant le traitement des panneaux photovoltaïques en fin de vie. Cette charte a pour ambition d’améliorer les conditions de récupération et de recyclage du photovoltaïque.

 

PV Cycle, une association pour le recyclage des panneaux photovoltaïques.

(...)


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Mobility of heavy metals and rare earth elements in incineration bottom ash through particle size reduction

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Recovering valuable metals from recycled photovoltaic modules.[J Air Waste Manag Assoc. 2014] - PubMed - NCBI

Abstract

Recovering valuable metals such as Si, Ag, Cu, and Al has become a pressing issue as end-of-life photovoltaic modules need to be recycled in the near future to meet legislative requirements in most countries. Of major interest is the recovery and recycling of high-purity silicon (> 99.9%) for the production of wafers and semiconductors. The value of Si in crystalline-type photovoltaic modules is estimated to be -$95/kW at the 2012 metal price. At the current installed capacity of 30 GW/yr, the metal value in the PV modules represents valuable resources that should be recovered in the future. The recycling of end-of-life photovoltaic modules would supply > 88,000 and 207,000 tpa Si by 2040 and 2050, respectively. This represents more than 50% of the required Si for module fabrication. Experimental testwork on crystalline Si modules could recover a > 99.98%-grade Si product by HNO3/NaOH leaching to remove Al, Ag, and Ti and other metal ions from the doped Si. A further pyrometallurgical smelting at 1520 degrees C using CaO-CaF2-SiO2 slag mixture to scavenge the residual metals after acid leaching could finally produce > 99.998%-grade Si. A process based on HNO3/NaOH leaching and subsequent smelting is proposed for recycling Si from rejected or recycled photovoltaic modules. Implications: The photovoltaic industry is considering options of recycling PV modules to recover metals such as Si, Ag, Cu, Al, and others used in the manufacturing of the PV cells. This is to retain its "green" image and to comply with current legislations in several countries. An evaluation of potential resources made available from PV wastes and the technologies used for processing these materials is therefore of significant importance to the industry. Of interest are the costs of processing and the potential revenues gained from recycling, which should determine the viability of economic recycling of PV modules in the future.

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Recycling of electric arc furnace dust through dissolution in deep eutectic ionic liquids and electrowinning

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Recycler intégralement les aimants permanents par fusion

Recycler intégralement les aimants permanents par fusion | Recyclage métaux et terres rares | Scoop.it
Les chercheurs de l'équipe sur les cycles de vie des matériaux et la stratégie pour les ressources (IWKS) de l'Institut Fraunhofer pour la recherche (...)

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Plasmonic-Induced Photon Recycling in Metal Halide Perovskite Solar Cells - Saliba - 2015 - Advanced Functional Materials - Wiley Online Library

Keywords: perovskite solar cells;core–shell nanoparticles;plasmonics Organic–inorganic metal halide perovskite solar cells have emerged in the past few years to promise highly efficient photovoltaic devices at low costs. Here, temperature-sensitive core–shell Ag@TiO2 nanoparticles are successfully incorporated into perovskite solar cells through a low-temperature processing route, boosting the measured device efficiencies up to 16.3%. Experimental evidence is shown and a theoretical model is developed which predicts that the presence of highly polarizable nanoparticles enhances the radiative decay of excitons and increases the reabsorption of emitted radiation, representing a novel photon recycling scheme. The work elucidates the complicated subtle interactions between light and matter in plasmonic photovoltaic composites. Photonic and plasmonic schemes such as this may help to move highly efficient perovskite solar cells closer to the theoretical limiting efficiencies.

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A cleaner process for selective recovery of valuable metals from electronic waste of complex mixtures of end-of-life electronic products - Environmental Science & Technology (ACS Publications)

A cleaner process for selective recovery of valuable metals from electronic waste of complex mixtures of end-of-life electronic products - Environmental Science & Technology (ACS Publications) | Recyclage métaux et terres rares | Scoop.it
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2015/06/12 > BE Pologne 28 > Méthode et dispositif de recyclage du silicium des cellules photovoltaïques

2015/06/12 > BE Pologne 28 > Méthode et dispositif de recyclage du silicium des cellules photovoltaïques | Recyclage métaux et terres rares | Scoop.it
Les Bulletins Electroniques des Ambassades de France - un service ADIT
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Criticality of Seven Specialty Metals - Panousi - 2015 - Journal of Industrial Ecology - Wiley Online Library

Criticality of Seven Specialty Metals - Panousi - 2015 - Journal of Industrial Ecology - Wiley Online Library | Recyclage métaux et terres rares | Scoop.it

Summary

Evaluating metal criticality is a topic that addresses future metals supply and that has inspired research in corporations, academic institutions, and governments. In this article, we apply a comprehensive criticality methodology to seven specialty metals—scandium (Sc), strontium (Sr), antimony (Sb), barium (Ba), mercury (Hg), thallium (Tl), and bismuth (Bi)—at the national and global levels for 2008. The results are presented along with uncertainty estimates in a three-dimensional “criticality space” comprised of supply risk (SR), vulnerability to supply restriction (VSR), and environmental implications (EI) axes. The SR score is the highest for antimony over the medium term (i.e., 5 to 10 years), followed very closely by bismuth and thallium; for the long term (i.e., a few decades), the highest SR is for thallium, followed very closely by antimony. Strontium and barium, followed very closely by mercury, have the lowest SR over the medium term, and mercury has the lowest SR over the long term. Mercury has the highest EI score. For VSR, thallium is the most vulnerable at both the national level (for the United States) and global level, followed by strontium at both levels. In general, specialty metals are found to possess a unique mix of sparse data, toxicity concerns (in some cases), and inadequate or nonexistent substitutes for a number of specialized uses, a situation that would seem to demand increased effort in acquiring the information needed to characterize specialty metal criticality with more rigor and transparency than is currently possible.

 

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Metaux precieux - Un consortium anglais de recyclage - Recyclage Récupération

Metaux precieux - Un consortium anglais de recyclage - Recyclage Récupération | Recyclage métaux et terres rares | Scoop.it
Informations sur l'environnement pour l'ensemble des professionnels du secteur, pr�sentation des revues du groupe Victoires Editions
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Recycling metals from wastes: a novel application of mechanochemistry - Environmental Science & Technology (ACS Publications)

Recycling metals from wastes: a novel application of mechanochemistry - Environmental Science & Technology (ACS Publications) | Recyclage métaux et terres rares | Scoop.it

Abstract

Recycling metals from wastes is essential to a resource-efficient economy, and increasing attention from researchers has been devoted to this process in recent years, with emphasis on mechanochemistry technology. The mechanochemical method can make technically feasible the recycling of metals from some specific wastes, such as cathode ray tube (CRT) funnel glass and tungsten carbide waste, while significantly improving recycling efficiency. Particle size reduction, specific surface area increase, crystalline structure decomposition and bond breakage have been identified as the main processes occurring during the mechanochemical operations in the studies. The activation energy required decreases and reaction activity increases, after these changes with activation progress. This study presents an overall review of the applications of mechanochemistry to metal recycling from wastes. The reaction mechanisms, equipment used, method procedures, and optimized operating parameters of each case, as well as methods enhancing the activation process are discussed in detail. The issues to be addressed and perspectives on the future development of mechanochemistry applied for metal recycling are also presented.

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Bacterial recovery and recycling of tellurium from tellurium-containing compounds by Pseudoalteromonas sp. EPR3 - Bonificio - 2014 - Journal of Applied Microbiology - Wiley Online Library

Bacterial recovery and recycling of tellurium from tellurium-containing compounds by Pseudoalteromonas sp. EPR3 - Bonificio - 2014 - Journal of Applied Microbiology - Wiley Online Library | Recyclage métaux et terres rares | Scoop.it
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Optimizing the thiosulfate leaching of gold from printed circuit boards of discarded mobile phone

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2014/08/12 > BE Italie 128 > Un four servant à recycler les déchets de production de silicium

2014/08/12 > BE Italie 128 > Un four servant à recycler les déchets de production de silicium | Recyclage métaux et terres rares | Scoop.it
Les Bulletins Electroniques des Ambassades de France - un service ADIT
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Removal of CdTe in acidic media by magnetic ion-exchange resin: A potential recycling methodology for cadmium telluride photovoltaic waste.[J Hazard Mater. 2014] - PubMed - NCBI

Abstract

Sulfonated magnetic microspheres (PSt-DVB-SNa MPs) have been successfully prepared as adsorbents via an aqueous suspension polymerization of styrene-divinylbenzene and a sulfonation reaction successively. The resulting adsorbents were confirmed by means of Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope equipped with an energy dispersive spectrometer (SEM-EDS) and vibrating sample magnetometer (VSM). The leaching process of CdTe was optimized, and the removal efficiency of Cd and Te from the leaching solution was investigated. The adsorbents could directly remove all cations of Cd and Te from a highly acidic leaching solution of CdTe. The adsorption process for Cd and Te reached equilibrium in a few minutes and this process highly depended on the dosage of adsorbents and the affinity of sulfonate groups with cations. Because of its good adsorption capacity in strong acidic media, high adsorbing rate, and efficient magnetic separation from the solution, PSt-DVB-SNa MPs is expected to be an ideal material for the recycling of CdTe photovoltaic waste.

 

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Synthesis of protonated chitosan flakes for the removal of vanadium(III, IV and V) oxyanions from aqueous solutions

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