SIMATUPANG, Lisnawaty; DEVI, Devi. The preparation and characterization of Sinabung volcanic ash as silica based adsorbent. Jurnal Pendidikan Kimia, [S. l.], v. 8, n. 3, p. 159–163, 2016. DOI: 10.24114/jpkim.v8i3.4478. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/4478. Acesso em: 4 jul. 2025.