SIMATUPANG, Lisnawaty; OKTAVIA, Devy Putri; DOLOKSARIBU, Maryati. The adsorption of heavy metal Pb(II) by silica based adsorbent from volcanic ash of mount sinabung. Jurnal Pendidikan Kimia, [S. l.], v. 9, n. 2, p. 330–335, 2017. DOI: 10.24114/jpkim.v9i2.7682. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/7682. Acesso em: 4 jul. 2025.