Iron (II) Removal Using Activated Silica/Lignin Composite: Kinetic and Equilibrium Studies. Jurnal Kimia Valensi, [S. l.], v. 8, n. 1, p. 85–91, 2022. DOI: 10.15408/jkv.v8i1.22715. Disponível em: https://journal.uinjkt.ac.id/valensi/article/view/22715. Acesso em: 16 oct. 2025.