Purbasari, Aprilina and Istadi, Istadi and Kumoro, Andri Cahyo and Sumantri, Indro and Silviana, Silviana (2021) Geopolymer from Metakaolin and Biomass Ash for Cu(II) Ions Adsorption from Aqueous Solutions: Kinetics and Isotherm Studies. Journal of Chemical Technology and Metallurgy, 56 (6). pp. 1225-1233. ISSN 1314-7978

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Abstract

The utilizations of geopolymer as adsorbent in the treatment of wastewater containing heavy metal or dyes have
shown encouraging results. In this paper, geopolymer synthesized from alkaline activation of metakaolin and biomass ash was utilized as adsorbent for Cu(II) ions from aqueous solutions. Adsorption of Cu(II) ions by geopolymer
followed Langmuir isotherm model which adsorption occurred on geopolymer surface by forming monolayer of
adsorbate molecule with maximum adsorption capacity of 58.824 mg g-1. Furthermore, pseudo-second order kinetics
model was more suitable to describe adsorption of Cu(II) ions by geopolymer.

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