Adsorption of β-Carotene In Isopropyl Alcohol with Decolorized Activated Charcoal as Model for β-Carotene Adsorption in Crude Palm Oil

Autor: Maria Ulfah, Sri Raharjo, Pudji Hastuti, Purnama Darmadji
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Indonesian Journal of Chemistry, Vol 17, Iss 1, Pp 105-112 (2017)
Druh dokumentu: article
ISSN: 1411-9420
2460-1578
DOI: 10.22146/ijc.23637
Popis: This study aimed to determine porosity properties of decolorized activated charcoal and its ability to adsorb β-carotene. Ability of activated charcoal for β-carotene adsorption in isopropyl alcohol determined at equilibrium conditions, were determined by the duration of adsorption time and activated charcoal concentration. Equilibrium time was determined from 0.5 to 60 min, concentration of activated charcoal was determined from 0.5 to 2.5%. Isothermal adsorption determined at β-carotene concentrations of 100-500 ppm with adsorption temperature of 30, 40 and 50°C at the equilibrium.The results showed that the activated charcoal used in this study had a Brunauer-Emmett-Teller (BET) surface area of 1068.391 m2/g, total pore volume of 0.9523 cc/g, mesopore volume of 0.528 cc/g, mesopore volume/total pore volume as much as 55.4 %, and mesopore radius of 15.26 Å. Based on content of β-carotene adsorbed into activated charcoal, adsorption equilibrium was reached after 5 min adsorption. Activated charcoal at a concentration of 1,5 % able to adsorb β-carotene optimally. Adsorption of β-carotene at 40°C for 60 min according to Freundlich adsorption model with coefficient of determination (R2 = 0.999), intensity of adsorption (1/n = 1.0024) and Freundlich adsorption capacity (KF=63.358 L/mg). Whereas adsorption of β-carotene at 50°C for 60 min according to Langmuir isotherm model with coefficient of determination (R2 = 0.969), adsorption capacity (b = 33.206 mg/g) and adsorption at equilibrium (Kb = 1.721 L/mg).
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