USE OF CLAYSTONE, ZEOLITE, AND ACTIVATED CARBON AS A COMPOSITE TO REMOVE HEAVY METALS FROM ACID MINE DRAINAGE IN COAL MINING. ASEAN Engineering Journal, [S. l.], v. 12, n. 2, p. 75–81, 2022. DOI: 10.11113/aej.v12.16982. Disponível em: https://journals.utm.my/aej/article/view/16982.. Acesso em: 24 nov. 2024.