| dc.description.abstract | Crude palm oil (CPO) is a natural resources that is rich in carotenoid. Carotenoid
in CPO (500-700 ppm) gives the reddish-orange color in crude palm oil
characteristics. The color of unprocessed palm oil is disliked by consumer. This
research is aimed to adsorb the β–carotene from the CPO using activated carbon
and to obtain the kinetics, isotherm models and thermodynamics data of the
adsorption process. The materials used in this research were CPO and activated
carbon. The observed parameters were β–carotene final concentration and the
amounts of adsorbed β–carotene in activated carbon. The adsorption process was
conducted by mixing the adsorbent with CPO with the variation of adsorbent:
CPO (w/w) ratio = 1:3; 1:4; 1:5 and 1:6 with steering speed 120 rpm and the
temperature of 40oC, 50oC and 60oC. The sample was analyzed at every 2 minutes
until the equilibrium was achieved. The final concentration of the unadsorbed β–
carotene was analyzed using UV-Vis spectrophotometer. The results showed that
the more CPO used in the process, the lower the adsorption percentage. The
higher the adsorption temperature, the higher adsorption percentage. In this
research, the maximum adsorption percentage was 95,1086% obtained at ratio 1:3
and T = 60 oC. The adsorption isotherm model which fit with the β–carotene
adsorption at T = 60 oC was Langmuir model with the correlation coefficient of
0,9590. The adsorption kinetics model which fit with the β–carotene adsorption
was the second order kinetics model with the correlation coefficient of 0,9987.
The thermodynamics data obtained from the adsorption process a value of were
ΔG = -24.482,4845; -24.708,0595 and -24.933,6345 (J/mol) for temperature of 40
oC, 50 oC and 60 oC respectively, ΔS = 22,5575 (J/mol K), and ΔH = -17.421,9870
(J/mol). | en_US |
