Dr. Sanja Knežević Graovac is a Research Associate at the Department of Materials, VINČA Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade. She received her BSc in Chemistry (2020), MSc in Biochemistry (2021), and PhD in Chemistry (2025) from the Faculty of Chemistry, University of Belgrade. Her PhD research focused on the thermo-acoustic properties of alkali-activated aluminosilicate materials incorporating neodymium(III) oxide and samarium(III) oxide. Her research interests include materials science, environmental chemistry, alkali-activated materials (geopolymers), rare earth elements, industrial and agricultural waste valorization, heavy metal adsorption for wastewater remediation, thermal treatment effects, structural and microstructural characterization, sustainable materials, and the circular economy.