PENURUNAN ANGKA PEROKSIDA MINYAK KELAPA TRADISIONAL DENGAN ADSORBEN ARANG SEKAM PADI IR 64 YANG DIAKTIFKAN DENGAN KALIUM HIDROKSIDA

Abstract

Research on IR64 rice shell ash activation with KOH was carried out. Then, this activated ash known as
adsorbent was applied to absorb H2O2 solution. This adsorbent was then applied to absorb peroxide number of
traditional coconut oil.
The research includes activation of rice ash with 5%, 10%, and 15% KOH, followed by determination of
rate and isotherm adsorption towards H2O2. Finally, the ash was applied to absorb traditional coconut oil, in order to
decrease peroxide number of the oil.
Research results indicated that, adsorption rate of the ash with KOH activation is higher than without KOH
activation. Adsorption isotherm patern of the ash with and without activation is following Langmuir adsorption. Rice
shell ash activated with 15% KOH can increased adsorption capacity of H2O2 about 297.16 mg/g, whereas without
activation the adsortion capacity is about 271.66 mg/g. Activated ash with 15% KOH was the applicated to decrease
peroxide number of traditional coconut oil. In this study, we obtain that the ash can decreased peroxide number until
84.4%.