Peningkatan mutu air sungai surabaya berbasis treatment koagulasi, absorbsi, dan ion exchange. WAKTU: Jurnal Teknik UNIPA, [S. l.], v. 21, n. 02, 2023. DOI: 10.36456/waktu.v21i02.7138. Disponível em: https://jurnal.unipasby.ac.id/waktu/article/view/7138. Acesso em: 16 jul. 2026.