Removal of Chromium, Iron and Manganese from contaminated waters using cryogels as adsorbent. Revista Torreón Universitario, [S. l.], v. 10, n. 27, p. 130–139, 2021. DOI: 10.5377/torreon.v10i27.10846. Disponível em: https://revistas.unan.edu.ni/index.php/Torreon/article/view/3140. Acesso em: 9 aug. 2025.