Utilization of activated carbon for the adsorption of methylene blue from waste coffee husk. Vietnam Journal of Catalysis and Adsorption, [S. l.], v. 14, n. 1, p. 27–33, 2025. DOI: 10.62239/jca.2025.006. Disponível em: https://jca.edu.vn/index.php/jca/article/view/2025.006.. Acesso em: 12 may. 2026.