Absorption Equilibrium and Thermodynamics of Fenugreek Yellow Pigment on Macroporous Resins

Abstract:

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The adsorption equilibrium and thermodynamics of pigment extracted from Fenugreek after degumming on macroporous resins was investigated under differentinitial concentrations. The suitability of the Freundlich and Langmuir adsorption models to the equilibrium data was investigated. The model fitness was determined by R2 . Thermodynamic parameters were calculated by the Van’t Hof equation.The results showed that Freundlich model gave a better fit of adsorption isotherms than Langmuir models. The positive value of enthalpy(∆H) indicated that the adsorption was endothermic, the negative value of Gibbs free energy (∆G) showed the spontaneous and favoured nature of adsorption, and the entropy(∆S) was positive.The resins LS-46 showed an effective adsorbtion for Fenugreek yellow pigment.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

91-94

DOI:

10.4028/www.scientific.net/AMR.233-235.91

Citation:

F. Han et al., "Absorption Equilibrium and Thermodynamics of Fenugreek Yellow Pigment on Macroporous Resins", Advanced Materials Research, Vols. 233-235, pp. 91-94, 2011

Online since:

May 2011

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Price:

$35.00

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