Silver Recovery from X-ray Film Waste by Leaching and Precipitation Method Using Sodium Hydroxide and Sodium Sulfide. Jurnal Kimia Valensi, [S. l.], v. 6, n. 1, p. 62–69, 2020. DOI: 10.15408/jkv.v6i1.13648. Disponível em: https://journal.uinjkt.ac.id/valensi/article/view/13648. Acesso em: 29 jan. 2026.