2026

• Stopić, Srećko; Emil Kaya, Elif; Yilmaz, Duygu. (2026) Waste Valorization: Recycling and Recovery of Critical and Strategic Metals. Minerals
  Leder
• Kaplan, S. Samet; Celik-Kurtulan, Cisem; Emil Kaya, Elif; Tranell, Maria Gabriella; Sonmez, M. Seref. (2026) The pivotal role of particle size on REE enrichment and extraction efficiency: A multi-modal characterization and leaching study of bastnäsite ore. Results in Engineering (RINENG)
  Vitenskapelig artikkel

2025

• Soylu, Edzhe; Erik, Ekstrøm, Kai; Emil Kaya, Elif; Inge, Johansson,; Tranell, Maria Gabriella. (2025) Resource Recovery from Municipal Solid Waste Incineration Fly Ash via Sulfuric Acid Digestion: Extraction of Zn and Cu with Calcium Sulfate Production | Journal of Sustainable Metallurgy. Journal of Sustainable Metallurgy
  Vitenskapelig artikkel
• Soylu, Edzhe; Erik, Ekstrøm, Kai; Emil Kaya, Elif; Inge, Johansson,; Meistad, Linus; B., Kowalczuk, Przemyslaw; Tranell, Maria Gabriella. (2025) Investigation of Methanesulfonic Acid as a Novel Leaching Agent for Metal Recovery from Municipal Solid Waste Incineration Fly Ash | Journal of Sustainable Metallurgy. Journal of Sustainable Metallurgy
  Vitenskapelig artikkel

2024

• Emil Kaya, Elif. (2024) An Integrated Hydrometallurgical Treatment and Combustion Process for Sustainable Production of Sm<inf>2</inf>O<inf>3</inf> Nanoparticles from Waste SmCo Magnets. Mining, Metallurgy & Exploration (MME)
  Vitenskapelig artikkel
• Ioannidis, Theodoros Nikolaos; Emil Kaya, Elif; Stopic, Srecko; Friedrich, Bernd. (2024) Separation of rare earth elements from waste NdFeB magnets: The influence of hematite seeds and agents on the hematite precipitation in nitric acid medium. Separation science and technology (Print)
  Vitenskapelig artikkel
• Uysal, Emircan; Emil Kaya, Elif; Dursun, Halide Nur; Papakci, Merve; Gürmen, Sebahattin; Friedrich, Bernd. (2024) Recovery of Samarium from Waste SmCo Magnets via Selective Precipitation with Ammonium Bicarbonate: Optimization of Process Efficiency. Metals
  Vitenskapelig artikkel
• Emil Kaya, Elif; Lu, Xi; Friedrich, Bernd. (2024) Recovery of samarium and cobalt/iron oxide from SmCo magnets through acid baking and water leaching. Journal of Material Cycles and Waste Management
  Vitenskapelig artikkel
• Emil Kaya, Elif; Papakci, Merve; Friedrich, Bernd. (2024) Recycling of SmCo Magnets by Removal of Iron via Oxidative Leaching. Mining, Metallurgy & Exploration (MME)
  Vitenskapelig artikkel
• Stopic, Srecko; Kostić, Duško; Emil Kaya, Elif; Uysal, Emircan; Gürmen, Sebahattin; Mitrašinović, Aleksandar; Perušić, Mitar; Friedrich, Bernd. (2024) High-Pressure and High-Temperature Dissolution of Titanium from Titanium and Aluminum Residues: A Comparative Study. Surfaces
  Vitenskapelig artikkel
• Emil Kaya, Elif; Uysal, Emircan; Dikmetas, Dilara Nur; Karbancioğlu-Güler, Funda; Gürmen, Sebahattin; Friedrich, Bernd. (2024) Development of a Near-Zero-Waste Valorization Concept for Waste NdFeB Magnets: Production of Antimicrobial Fe Alginate Beads via Adsorption and Recovery of High-Purity Rare-Earth Elements. ACS Omega
  Vitenskapelig artikkel
• Kostić, Duško; Stopic, Srecko; Keutmann, Monika; Emil Kaya, Elif; Husovic, Tatjana Volkov; Perušić, Mitar; Friedrich, Bernd. (2024) Synthesis of Titanium-Based Powders from Titanium Oxy-Sulfate Using Ultrasonic Spray Pyrolysis Method. Materials
  Vitenskapelig artikkel
• Stopic, Srecko; Kostić, Duško; Schneider, Richard; Sievers, Magnus; Wegmann, Florian; Emil Kaya, Elif; Perušić, Mitar; Friedrich, Bernd. (2024) Recovery of Titanium from Red Mud Using Carbothermic Reduction and High Pressure Leaching of the Slag in an Autoclave. Minerals
  Vitenskapelig artikkel
• Papakci, Merve; Emil Kaya, Elif; Stopic, Srecko; Gurmen, Sebahattin; Friedrich, Bernd. (2024) Recovery of valuable metals from SmCo magnets through sulfation, selective oxidation, and water leaching. Separation science and technology (Print)
  Vitenskapelig artikkel
• Stopic, Srecko; Hounsinou, Ayadjenou Humphrey; Husovic, Tatjana Volkov; Emil Kaya, Elif; Friedrich, Bernd. (2024) Synthesis of AgCoCuFeNi High Entropy Alloy Nanoparticles by Hydrogen Reduction-Assisted Ultrasonic Spray Pyrolysis. ChemEngineering
  Vitenskapelig artikkel

2023

• Emil Kaya, Elif; Uysal, Emircan; Gürmen, Sebahattin; Friedrich, Bernd. (2023) Comparison of production of mixed rare earth oxide (Nd/Pr oxide) powders by different precipitation agents from NdFeB magnets’ water leaching. Canadian metallurgical quarterly
  Vitenskapelig artikkel
• Stopic, Srecko; Hounsinou, Ayadjenou Humphrey; Stéphane, Koffi Aka; Husovic, Tatjana Volkov; Emil Kaya, Elif; Friedrich, Bernd. (2023) Transformation of Iron (III) Nitrate from an Aerosol by Ultrasonic Spray Pyrolysis and Hydrogen Reduction. Metals
  Vitenskapelig artikkel
• Emil Kaya, Elif; Kaya, Ozan; Stopic, Srecko; Gürmen, Sebahattin; Friedrich, Bernd. (2023) Recycling of NdFeB magnets: Model supported iron minimization via in-situ hydrolysis during leaching and hematite precipitation in an autoclave. Hydrometallurgy
  Vitenskapelig artikkel