{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,10]],"date-time":"2025-11-10T09:25:46Z","timestamp":1762766746365,"version":"build-2065373602"},"reference-count":57,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T00:00:00Z","timestamp":1762560000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002848","name":"ANID","doi-asserted-by":"publisher","award":["AFB230001"],"award-info":[{"award-number":["AFB230001"]}],"id":[{"id":"10.13039\/501100002848","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002847","name":"MINEDUC-UA project","doi-asserted-by":"publisher","award":["ANT 1999"],"award-info":[{"award-number":["ANT 1999"]}],"id":[{"id":"10.13039\/501100002847","id-type":"DOI","asserted-by":"publisher"}]},{"name":"FCT\/MCTES","award":["UIDB\/50011\/2020","UIDP\/50011\/2020","LA\/P\/0006\/2020"],"award-info":[{"award-number":["UIDB\/50011\/2020","UIDP\/50011\/2020","LA\/P\/0006\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Minerals"],"abstract":"<jats:p>Copper is a critical resource for the energy transition and the development of novel sustainable processes for its recovery must be a focus of research. The use of deep eutectic solvents (DES) is an alternative for the solvometallurgical extraction of copper from sulfide ores with low or zero water consumption. The objective of this research is to study the dissolution of low-grade copper sulfide ore (0.83% Cu) using deep eutectic solvents. Laboratory scale agitation leaching tests were performed using different DES based on choline chloride (ChCl), namely ChCl-ethylene glycol, ChCl-citric acid, and ChCl-urea, at different temperatures (25, 50, and 60 \u00b0C). The effect of water and hydrogen peroxide was also studied in some systems. The best copper extractions were achieved with ChCl-citric acid &gt; ChCl-urea &gt; ChCl-ethylene glycol, reaching \u224899% copper extraction in some cases. This mineral leaching process offers an alternative to the processing of sulfide minerals and could be a technique that allows the use of solvent extraction and electrodeposition facilities available at a metallurgical plant, with less water consumption than the traditional leaching process.<\/jats:p>","DOI":"10.3390\/min15111176","type":"journal-article","created":{"date-parts":[[2025,11,10]],"date-time":"2025-11-10T08:57:55Z","timestamp":1762765075000},"page":"1176","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Copper Dissolution from Sulfide Ore with Deep Eutectic Solvents Based on Choline Chloride"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9939-8386","authenticated-orcid":false,"given":"P\u00eda C.","family":"Hern\u00e1ndez","sequence":"first","affiliation":[{"name":"Departamento de Ingenier\u00eda Qu\u00edmica y Procesos de Minerales (DIQUIMIN), Facultad de Ingenier\u00eda, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile"},{"name":"Centro de Econom\u00eda Circular en Procesos Industriales (CECPI), Facultad de Ingenier\u00eda, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Antofagasta 1270300, Chile"},{"name":"Advanced Mining Technology Center (AMTC), University of Chile, Av. Tupper 2007 (AMTC Building), Santiago 8330015, Chile"}]},{"given":"Mat\u00edas","family":"Mu\u00f1oz V.","sequence":"additional","affiliation":[{"name":"Departamento de Ingenier\u00eda Qu\u00edmica y Procesos de Minerales (DIQUIMIN), Facultad de Ingenier\u00eda, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6451-4615","authenticated-orcid":false,"given":"Yecid P.","family":"Jim\u00e9nez","sequence":"additional","affiliation":[{"name":"Departamento de Ingenier\u00eda Qu\u00edmica y Procesos de Minerales (DIQUIMIN), Facultad de Ingenier\u00eda, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile"},{"name":"Centro de Econom\u00eda Circular en Procesos Industriales (CECPI), Facultad de Ingenier\u00eda, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Antofagasta 1270300, Chile"},{"name":"Advanced Mining Technology Center (AMTC), University of Chile, Av. Tupper 2007 (AMTC Building), Santiago 8330015, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3841-743X","authenticated-orcid":false,"given":"Jo\u00e3o A. P.","family":"Coutinho","sequence":"additional","affiliation":[{"name":"CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0747-2532","authenticated-orcid":false,"given":"Nicolas","family":"Schaeffer","sequence":"additional","affiliation":[{"name":"CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3283-921X","authenticated-orcid":false,"given":"Sonia","family":"Cort\u00e9s","sequence":"additional","affiliation":[{"name":"Departamento de Ingenier\u00eda Qu\u00edmica y Procesos de Minerales (DIQUIMIN), Facultad de Ingenier\u00eda, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile"},{"name":"Advanced Mining Technology Center (AMTC), University of Chile, Av. Tupper 2007 (AMTC Building), Santiago 8330015, Chile"}]},{"given":"Alejandra","family":"Cerda","sequence":"additional","affiliation":[{"name":"Advanced Mining Technology Center (AMTC), University of Chile, Av. Tupper 2007 (AMTC Building), Santiago 8330015, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8518-7131","authenticated-orcid":false,"given":"Humberto","family":"Estay","sequence":"additional","affiliation":[{"name":"Advanced Mining Technology Center (AMTC), University of Chile, Av. Tupper 2007 (AMTC Building), Santiago 8330015, Chile"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"565","DOI":"10.1016\/j.ecolind.2015.08.003","article-title":"Sustainable Development Goals: A need for relevant indicators","volume":"60","author":"Moldan","year":"2016","journal-title":"Ecol. Indic."},{"key":"ref_2","unstructured":"United Nation (2015). Transforming Our World: The 2030 Agenda for Sustainable Development."},{"key":"ref_3","unstructured":"Ministerio del Medio Ambiente (2021). Hoja de Ruta para un Chile Circular al 2040."},{"key":"ref_4","unstructured":"Coorporaci\u00f3n-Alta-Ley (2021). Miner\u00eda Verde. Oportunidades y Desaf\u00edos, Coorporaci\u00f3n-Alta-Ley."},{"key":"ref_5","unstructured":"SERNAGEOMIN (2025). Anuario de la Miner\u00eda de Chile 2024, Servicio Nacional de Geolog\u00eda y Miner\u00eda."},{"key":"ref_6","unstructured":"Coorporaci\u00f3n-Alta-Ley (2019). Hoja de Ruta 2.0 de la Miner\u00eda Chilena. Actualizaci\u00f3n y Consensos para una Mirada Renovada, Coorporaci\u00f3n-Alta-Ley."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"130","DOI":"10.1080\/08827508.2022.2123322","article-title":"Review on the mineral processing in ionic liquids and deep eutectic solvents","volume":"45","author":"Tian","year":"2024","journal-title":"Miner. Process. Extr. Metall. Rev."},{"key":"ref_8","unstructured":"Anastas, P.T., and Warner, J.C. (1998). Principles of green chemistry. Green Chemistry: Theory and Practice, Oxford University Press."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1631","DOI":"10.1002\/jctb.4668","article-title":"Green solvents for green technologies","volume":"90","year":"2015","journal-title":"J. Chem. Technol. Biotechnol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"9550","DOI":"10.1039\/c3cs60241a","article-title":"Bio-based solvents: An emerging generation of fluids for the design of eco-efficient processes in catalysis and organic chemistry","volume":"42","author":"Gu","year":"2013","journal-title":"Chem. Soc. Rev."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Carlesi, C., Harris, R.C., Abbott, A.P., and Jenkin, G.R. (2022). Chemical dissolution of chalcopyrite concentrate in choline chloride ethylene glycol deep eutectic solvent. Minerals, 12.","DOI":"10.3390\/min12010065"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"710","DOI":"10.3390\/min12060710","article-title":"Perspectives of using DES-Based systems for solid\u2013liquid and liquid\u2013liquid extraction of metals from E-Waste","volume":"12","author":"Dias","year":"2022","journal-title":"Minerals"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"9142","DOI":"10.1021\/ja048266j","article-title":"Deep eutectic solvents formed between choline chloride and carboxylic acids: Versatile alternatives to ionic liquids","volume":"126","author":"Abbott","year":"2004","journal-title":"J. Am. Chem. Soc."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1232","DOI":"10.1021\/acs.chemrev.0c00385","article-title":"Deep eutectic solvents: A review of fundamentals and applications","volume":"121","author":"Hansen","year":"2020","journal-title":"Chem. Rev."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"23484","DOI":"10.1039\/D0RA03696J","article-title":"Effects of thiol substitution in deep-eutectic solvents (DESs) as solvents for metal oxides","volume":"10","author":"Damilano","year":"2020","journal-title":"RSC Adv."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"125619","DOI":"10.1016\/j.seppur.2023.125619","article-title":"Hydrophobic deep eutectic solvents for the direct leaching of nickel laterite ores: Selectivity and reusability investigations","volume":"331","author":"Sakamoto","year":"2024","journal-title":"Sep. Purif. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"14592","DOI":"10.1021\/acsomega.4c01052","article-title":"Role of Oxidants in Metal Extraction from Sulfide Minerals in a Deep Eutectic Solvent","volume":"9","author":"Bidari","year":"2024","journal-title":"ACS Omega"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"105732","DOI":"10.1016\/j.hydromet.2021.105732","article-title":"Processing of anode slime with deep eutectic solvents as a green leachant","volume":"205","author":"Kalem","year":"2021","journal-title":"Hydrometallurgy"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"114957","DOI":"10.1016\/j.wasman.2025.114957","article-title":"Efficiently leaching rare earth metal yttrium in deep eutectic solvents from waste phosphors based on a novel single-mode bottom-focused microwave reaction system","volume":"204","author":"Li","year":"2025","journal-title":"Waste Manag."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"R\u00fc\u015fen, A., \u00d6zel, F., and Top\u00e7u, M.A. (2025). Solvometallurgical Recovery of Zinc and Lead from \u00c7in\u2013Kur Leaching Residue Using Deep Eutectic Solvent. J. Sustain. Metall., 1\u201316.","DOI":"10.1007\/s40831-025-01245-6"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"14","DOI":"10.1016\/j.cjche.2024.07.005","article-title":"Green leaching and predictive model for copper recovery from waste smelting slag with choline chloride-based deep eutectic solvent","volume":"75","year":"2024","journal-title":"Chin. J. Chem. Eng."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"133258","DOI":"10.1016\/j.jhazmat.2023.133258","article-title":"Negative-carbon recycling of copper from waste as secondary resources using deep eutectic solvents","volume":"465","author":"Liu","year":"2024","journal-title":"J. Hazard. Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"100913","DOI":"10.1016\/j.cogsc.2024.100913","article-title":"Sustainable recovery of metals from e-waste using deep eutectic solvents: Advances, challenges, and perspectives","volume":"47","author":"Guo","year":"2024","journal-title":"Curr. Opin. Green Sustain. Chem."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"133712","DOI":"10.1016\/j.seppur.2025.133712","article-title":"Sustainable leaching of metals from waste printed circuit boards using efficient carboxylic acid-based deep eutectic solvents","volume":"374","author":"Oke","year":"2025","journal-title":"Sep. Purif. Technol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"144128","DOI":"10.1016\/j.jclepro.2024.144128","article-title":"Efficient leaching of valuable metals from spent lithium-ion batteries using green deep eutectic solvents: Process optimization, mechanistic analysis, and environmental impact assessment","volume":"480","author":"Zheng","year":"2024","journal-title":"J. Clean. Prod."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"570","DOI":"10.1007\/s40831-017-0128-2","article-title":"Solvometallurgy: An emerging branch of extractive metallurgy","volume":"3","author":"Binnemans","year":"2017","journal-title":"J. Sustain. Metall."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"123070","DOI":"10.1016\/j.molliq.2023.123070","article-title":"Deep eutectic solvents: Physico-chemical properties and their use for recovery of metal values from waste products","volume":"390","author":"Panda","year":"2023","journal-title":"J. Mol. Liq."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"108306","DOI":"10.1016\/j.mineng.2023.108306","article-title":"Properties and perspective of using deep eutectic solvents for hydrometallurgy metal recovery","volume":"203","year":"2023","journal-title":"Miner. Eng."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1280","DOI":"10.1021\/je060038c","article-title":"Solubility of metal oxides in deep eutectic solvents based on choline chloride","volume":"51","author":"Abbott","year":"2006","journal-title":"J. Chem. Eng. Data"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"6502","DOI":"10.1039\/C9GC03213D","article-title":"Direct extraction of copper from copper sulfide minerals using deep eutectic solvents","volume":"21","author":"Anggara","year":"2019","journal-title":"Green Chem."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.wasman.2021.07.022","article-title":"Treatment of copper converter slag with deep eutectic solvent as green chemical","volume":"132","year":"2021","journal-title":"Waste Manag."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Arag\u00f3n-Tobar, C.F., Endara, D., and de la Torre, E. (2024). Dissolution of Metals (Cu, Fe, Pb, and Zn) from Different Metal-Bearing Species (Sulfides, Oxides, and Sulfates) Using Three Deep Eutectic Solvents Based on Choline Chloride. Molecules, 29.","DOI":"10.3390\/molecules29020290"},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Ghadamgahi, S.M., Babakhani, A., Darband, G.B., Shalchian, H., and Behmadi, R. (2025). Solvometallurgical properties of choline chloride-based deep eutectic solvents for copper extraction from chalcopyrite: Optimization and analysis. Mining, 5.","DOI":"10.3390\/mining5010008"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"117779","DOI":"10.1016\/j.jece.2025.117779","article-title":"Deep Eutectic Solvents (DESs) for Chalcopyrite Concentrate Extraction: Leaching, Optimization and Kinetics Mechanism","volume":"13","author":"Shiri","year":"2025","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"815","DOI":"10.3390\/min15080815","article-title":"Hydrometallurgical Leaching of Copper and Cobalt from a Copper\u2013Cobalt Ore by Aqueous Choline Chloride-Based Deep Eutectic Solvent Solutions","volume":"15","author":"Oke","year":"2025","journal-title":"Minerals"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"101481","DOI":"10.1016\/j.nanoso.2025.101481","article-title":"Sustainable synthesis and application of green deep eutectic solvent in chalcopyrite leaching: A combined experimental and molecular dynamic simulation approach","volume":"42","author":"Karimi","year":"2025","journal-title":"Nano-Struct. Nano-Objects"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"106118","DOI":"10.1016\/j.jtice.2025.106118","article-title":"A new approach to direct chemical leaching of Sungun chalcopyrite concentrate via green deep eutectic solvent choline chloride-\u03c1-toluenesulfonic acid and MD simulation","volume":"172","author":"Behnajady","year":"2025","journal-title":"J. Taiwan Inst. Chem. Eng."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"109606","DOI":"10.1016\/j.mineng.2025.109606","article-title":"Green Solvent-Driven Chalcopyrite Dissolution: Ternary DES (ChCl\/MOA\/PTSA) for High-Efficiency Copper Extraction via RSM Optimization, Kinetics, and Molecular Dynamics Insights","volume":"233","author":"Moradi","year":"2025","journal-title":"Miner. Eng."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"e202400410","DOI":"10.1002\/cssc.202400410","article-title":"Addressing the reuse of deep eutectic solvents in li-ion battery recycling: Insights into dissolution mechanism, metal recovery, regeneration and decomposition","volume":"17","author":"Ma","year":"2024","journal-title":"ChemSusChem"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"4210","DOI":"10.1039\/D0GC00940G","article-title":"Solvometallurgical recovery of cobalt from lithium-ion battery cathode materials using deep-eutectic solvents","volume":"22","author":"Peeters","year":"2020","journal-title":"Green Chem."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"134195","DOI":"10.1016\/j.seppur.2025.134195","article-title":"Sustainable and selective recovery of copper from electroplating sludge via choline chloride-citric acid deep eutectic solvent: Mechanistic elucidation and process intensification","volume":"376","author":"Yu","year":"2025","journal-title":"Sep. Purif. Technol."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"5476","DOI":"10.1039\/D0GC02023K","article-title":"The effect of pH and hydrogen bond donor on the dissolution of metal oxides in deep eutectic solvents","volume":"22","author":"Pateli","year":"2020","journal-title":"Green Chem."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"3344","DOI":"10.1021\/je500320c","article-title":"Effect of water on the density, viscosity, and CO2 solubility in choline chloride\/urea","volume":"59","author":"Xie","year":"2014","journal-title":"J. Chem. Eng. Data"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"132543","DOI":"10.1016\/j.colsurfa.2023.132543","article-title":"Water-induced changes in choline chloride-carboxylic acid deep eutectic solvents properties","volume":"679","author":"Ninayan","year":"2023","journal-title":"Colloids Surf. A Physicochem. Eng. Asp."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1039\/D0CP05843B","article-title":"Connecting chloride solvation with hydration in deep eutectic systems","volume":"23","author":"Hammond","year":"2021","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"11060","DOI":"10.1021\/cr300162p","article-title":"Deep eutectic solvents (DESs) and their applications","volume":"114","author":"Smith","year":"2014","journal-title":"Chem. Rev."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"3039","DOI":"10.1021\/acs.jpclett.4c03645","article-title":"Room-temperature decomposition of the ethaline deep eutectic solvent","volume":"16","author":"Yang","year":"2025","journal-title":"J. Phys. Chem. Lett."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.molliq.2018.03.076","article-title":"Thermal stability of choline chloride deep eutectic solvents by TGA\/FTIR-ATR analysis","volume":"260","author":"Larriba","year":"2018","journal-title":"J. Mol. Liq."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Petrovi\u0107, S.J., Bogdanovi\u0107, G.D., Antonijevi\u0107, M.M., Vuk\u010devi\u0107, M., and Kova\u010devi\u0107, R. (2023). The Extraction of Copper from Chalcopyrite Concentrate with Hydrogen Peroxide in Sulfuric Acid Solution. Metals, 13.","DOI":"10.3390\/met13111818"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1016\/S0304-386X(03)00082-3","article-title":"Kinetics of chalcopyrite dissolution by hydrogen peroxide in sulphuric acid","volume":"71","year":"2004","journal-title":"Hydrometallurgy"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"105893","DOI":"10.1016\/j.hydromet.2022.105893","article-title":"Improvement in atmospheric leaching of chalcopyrite concentrate using a new environmentally-friendly ionic liquid","volume":"211","author":"Sahlabad","year":"2022","journal-title":"Hydrometallurgy"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"192","DOI":"10.1016\/j.hydromet.2017.01.014","article-title":"Study of chalcopyrite leaching from a copper concentrate with hydrogen peroxide in aqueous ethylene glycol media","volume":"169","author":"Lapidus","year":"2017","journal-title":"Hydrometallurgy"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"2482","DOI":"10.1021\/acssusresmgt.4c00339","article-title":"Deep Eutectic Solvent-Aqueous Two-Phase Leaching System for Direct Separation of Lithium and Critical Metals","volume":"1","author":"Septioga","year":"2024","journal-title":"ACS Sustain. Resour. Manag."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"12625","DOI":"10.1039\/D4TA08483G","article-title":"Solvometallurgy: Design of ternary deep eutectic solvents for the electrochemical recovery of nickel from lithium-ion cathode materials","volume":"13","author":"Sahadevan","year":"2025","journal-title":"J. Mater. Chem. A"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.jhazmat.2014.07.066","article-title":"Recycling of electric arc furnace dust through dissolution in deep eutectic ionic liquids and electrowinning","volume":"280","author":"Bakkar","year":"2014","journal-title":"J. Hazard. Mater."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"129249","DOI":"10.1016\/j.cej.2021.129249","article-title":"Selective recovery of cobalt from mixed lithium ion battery wastes using deep eutectic solvent","volume":"417","author":"Schiavi","year":"2021","journal-title":"Chem. Eng. J."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"1109","DOI":"10.1070\/RCR5007","article-title":"New generation extraction solvents: From ionic liquids and aqueous biphasic systems to deep eutectic solvents","volume":"90","author":"Pletnev","year":"2021","journal-title":"Russ. Chem. Rev."}],"container-title":["Minerals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-163X\/15\/11\/1176\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,10]],"date-time":"2025-11-10T09:23:07Z","timestamp":1762766587000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-163X\/15\/11\/1176"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,11,8]]},"references-count":57,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2025,11]]}},"alternative-id":["min15111176"],"URL":"https:\/\/doi.org\/10.3390\/min15111176","relation":{},"ISSN":["2075-163X"],"issn-type":[{"value":"2075-163X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,11,8]]}}}