Activation of Kaolin Minerals from Ketapang Regency as Cu Metal Adsorbent Material

Sy. Indra Septiansyah; Idris Herkan Afandi; Retno Tasya Dirtami

doi:10.55981/eksplorium.2022.5802

Activation of Kaolin Minerals from Ketapang Regency as Cu Metal Adsorbent Material

Sy. Indra Septiansyah, Idris Herkan Afandi, Retno Tasya Dirtami

DOI: http://dx.doi.org/10.55981/eksplorium.2022.5802

Abstract

Kaolin is a term given to a group of phyllosilicate minerals whose layers have a 1:1 structure with Al₂Si₂O₅(OH)₄ composition. This type of kaolin phyllosilicate mineral is commonly known as a clay mineral. The kaolin clay group consists mainly of the kaolinite mineral or better known as white clay. Kaolin is widely applied in industries such as paper, ceramics, rubber, plastic, paint, fiberglass, cosmetics, etc. The processing of kaolin as an adsorbent can be carried out using physical activation, where the kaolin is washed and separated from the impurities and dried into a powder. Then the chemical activation of kaolin will go through a leaching process using HCl with optimal concentrations aimed at separating kaolin from impurities that are still chemically bound to kaolin. The results of the characteristics show recovery of 71.42% to 81.2% and moisture content <2%. The chemical composition of kaolin containing SiO₂ was 53.32–67.32%, Al₂O₃ was 28.22–30.47%, Fe₂O₃ was 1.32%, CaO was 0.03%, MgO was 0.20%, MnO₂ was 0.01%, K₂O of 0.86%, NaO of 0.01%, Cr of 0.01%, LOI of 11.03%. The adsorption test results on Cu metal in CuSO₄ solution showed the absorption of 62–93% of Cu metal which was adsorption.

Keywords

kaolin, physical activation, chemical activation, adsorbent, metal adsorption

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