Adsorption of Isopropyl Alcohol (IPA) in Water Using Activated Bentonite

A. Abdulloh, G. Supriyanto, O. W. Ningsih

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


It has been done separation isopropyl alcohol (IPA) in water using activated bentonite as adsorbent. Preparation of activated bentonite is done using H 2 SO 4 1 M. Characterization of adsorbent includes structural analysis with XRD, surface area and pore size using the BET method. The adsorption test is carried out in a batch system with variations in stirring time, adsorbent mass, pH and temperature. Analysis of the amount of IPA adsorbed is determined by a picnometer. The results of the adsorption test showed that the adsorption capacity optimum of IPA by activated bentonite was 116.62 mg/g at optimum conditions, i.e. 40 minutes stirring time, 1 g of active bentonite mass, at 30 °C and acidity level 7. Model of isotherm adsorption of IPA in activated bentonite are isotherm Langmuir model with corelation coefficient (R 2 ) of 0,9283. The thermodynamic parameters (ΔH°, ΔS° and ΔG°) are 189.37 J•mol -1 ,-1.08 J•mol -1 •K -1 and 132.63 J•mol -1 respectively.


  • Bentonite
  • isopropyl alcohol
  • separation


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