Siti Norsaffirah Zailan, Norsuria Mahmed, Nur Mawaddah Juzaini, Mohd Natashah Norizan, Ili Salwani Mohamad, and Aissa Bouaissi. “Magnetite (Fe3O4)-Activated Carbon Composite from Ground Coffee Waste for the Removal of Copper Ions (Cu2+) from Solution”. International Journal of Nanoelectronics and Materials (IJNeaM) 17, no. December (December 27, 2024): 147–153. Accessed January 11, 2025. https://ejournal.unimap.edu.my/index.php/ijneam/article/view/1618.