HAMDOUN, A.; AHMED, M. Preparation of Activated Carbon from spent lubricant Oils Using Catalyst Polymer Processing. Journal of Education and Science (JES), [S. l.], v. 25, n. 2, p. 44–57, 2012. DOI: 10.33899/edusj.2012.59147. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23860. Acesso em: 6 aug. 2025.