THE ROLE OF SODIUM ION IN PHOSPHORUS REMOVAL WHEN ALUM IS USED AS A COAGULANT. Journal of Engineering and Sustainable Development, [S. l.], v. 26, n. 5, p. 127–137, 2022. DOI: 10.31272/jeasd.26.5.12. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1886.. Acesso em: 29 apr. 2024.