“Efficiency of Zinc (II) Metal Ion Adsorption Using Fe3O4 Clay Composites from Bangka: Efficiency of Zinc (II) Metal Ion Adsorption Using Fe3O4 Clay Composites from Bangka”. Stannum : Jurnal Sains Dan Terapan Kimia, vol. 3, no. 1, Apr. 2021, pp. 23-29, https://doi.org/10.33019/jstk.v3i1.2230.