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Santa Oktavia Ginting Risfidian Mohadi
DOI: Published Apr 10, 2017


Kaolinite was impregnated with cellulose extracted from rubber wood fibers has been done. The product of impregnated kaolinite-cellulose was characterized using FT-IR spectrophotometer. Furthermore, the impregnation results are used as an adsorbent of Congo red. Adsorption of Congo red was also studied the kinetic and thermodynamic parameters. The results of characterization using FT-IR spectrophotometer shows the process of impregnation was successfully conducted. It was indicated that the presence wavenumber at 910.4 - 918.12 cm-1 and 1033.85 cm-1 become 1026.13 cm-1 and the existence of vibration at wavenumber 2931.8 cm-1. The pH of adsorption was adjusted to 4 before the adsorption process. The adsorption process of cellulose impregnated kaolinite shows the rate of adsorption (k) of 0.002 min-1, the adsorption reviews largest capacity (b) at 50 °C was 500 mol/g. The greatest adsorption energy (E) at 40 °C is 11:09 kJ/mol. The enthalpy value (ΔH) and entropy (ΔS) decreased with increasing Congo red dye concentration.

Keywords: kaolinite, cellulose, impregnation, Congo red

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How to Cite
GINTING, Santa Oktavia; MOHADI, Risfidian. Adsorption of congo red using kaolinite-cellulose adsorbent. Science and Technology Indonesia, [S.l.], v. 2, n. 2, p. 29-36, apr. 2017. ISSN 2580-4391. Available at: <>. Date accessed: 29 mar. 2020. doi: