Analysis of Acid Options in the Purification of Spent Motor Engine Oil Using Acidified Clay. International Journal of Latest Technology in Engineering Management & Applied Science, [S. l.], v. 13, n. 9, p. 122–130, 2024. DOI: 10.51583/IJLTEMAS.2024.130912. Disponível em: https://www.ijltemas.in/submission/index.php/online/article/view/940.. Acesso em: 20 oct. 2024.