Nitrite Removal Efficiency from Tofu Wastewater Using Robusta Coffee Grounds as a Biosorbent. International Journal of Energy & Environment, [S. l.], v. 1, n. 1, p. 275–286, 2026. Disponível em: https://e-journal.scholar-publishing.org/index.php/ijee/article/view/277. Acesso em: 4 aug. 2026.