[1]
Simatupang, L. et al. 2017. The adsorption of heavy metal Pb(II) by silica based adsorbent from volcanic ash of mount sinabung. Jurnal Pendidikan Kimia. 9, 2 (Aug. 2017), 330–335. DOI:https://doi.org/10.24114/jpkim.v9i2.7682.