Analysis of Fe metal adsorption in industrial wastewater using adsorbents from betel nut skin. Jurnal Pendidikan Kimia, [S. l.], v. 15, n. 1, p. 35–40, 2023. DOI: 10.24114/jpkim.v15i1.42478. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/42478. Acesso em: 21 mar. 2026.