SUKMAWATI, Salma Husna; SUNARTO, Sunarto. Utilization of Coffee Waste as Active Charcoal For Purification of Waste Cooking Oil. Indonesian Journal of Chemistry and Environment, [S. l.], v. 3, n. 2, p. 29–38, 2021. DOI: 10.21831/ijce.v3i2.43510. Disponível em: https://journal.uny.ac.id/index.php/ijoce/article/view/43510. Acesso em: 11 may. 2025.