ISTIYORINI, NUNUNG. PEMANFAAATAN PIROPILIT TERAKTIVASI ASAM SULFAT (H2SO4) SEBAGAI ADSORBEN PADA PROSES PENJERNIHAN PELUMAS BEKAS (UTILIZATION of ACTIVATED PIROPILIT BY SULFURIC ACIDS AS ADSORBEN at CLEARED USED LUBRICANT PROCESS). Unesa Journal of Chemistry, [S. l.], v. 1, n. 2, 2012. DOI: 10.26740/ujc.v1n2.p%p. Disponível em: https://ejournal.unesa.ac.id/index.php/unesa-journal-of-chemistry/article/view/336. Acesso em: 5 nov. 2025.