Removing Manganese and Chromium from Drinking Water using Tannin-based biosorbents. Academic Science Journal, [S. l.], v. 3, n. 3, p. 37–47, 2025. DOI: 10.24237/. Disponível em: https://acadscij.uodiyala.edu.iq/index.php/Home/article/view/363. Acesso em: 8 aug. 2025.