Improved rare earth elements recovery from fluorescent lamp wastes applying supported liquid membranes to the leaching solutions
| Autor: | Agustí Fortuny, Ana Maria Sastre, S. Pavón, M.T. Coll |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. Departament d'Enginyeria Agroalimentària i Biotecnologia, Universitat Politècnica de Catalunya. R2EM - Resource Recovery and Environmental Management |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Fluorescent lamp wastes Rare earth Filtration and Separation 02 engineering and technology Raw material Membranes (Technology) REEs recovery Analytical Chemistry law.invention Metal Enginyeria química [Àrees temàtiques de la UPC] 020401 chemical engineering law Impurity Supported liquid membranes Leachate 0204 chemical engineering Fluorescent lamp Membranes (Tecnologia) 021001 nanoscience & nanotechnology REEs transport Membranes líquides Membrane Chemical engineering visual_art visual_art.visual_art_medium Leaching Leaching (metallurgy) 0210 nano-technology Liquid membranes |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| Popis: | Due to the continuously growing demand of rare earths in advanced technologies, end-of-life fluorescent lamps may become feasible rare earth elements (REEs) raw materials, reducing thus their supply risk. Considering acid leaching as the most common method in the metal recover from an end-of-life product real scratch resulting from the fluorescent lamps, this paper proposes an improvement of the REEs recovery from these wastes adding a supported liquid membrane (SLM) step to minimize the loss of these metals in the first leaching (L1). HNO3 or HCl are the most appropriate acid agents in the L1 stage considering the balance between the Ca (II) impurity removal and the REEs losses minimization. These REEs lost can be entirely recovered from the L1 leachate by flat sheet supported liquid membranes (FSSLM) using Cyanex 923 as carrier and Na2EDTA as the receiving phase. REEs, especially Y and Eu, have been recovered in quantitative yields using a L1–FSSLM–L2 process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|