Kinetic Process of Purple Cabbage Pigment on Macro Porous Absorbent Resin

Abstract:

The adsorption kinetics of purple cabbage pigment (PCP) on LSA-21 macro porous adsorbent resin were studied at different adsorbent resin concentrations (1, 2, 4, 8 g adsorbent resin per liter of purple cabbage extraction solution) for the temperature range of 20~50°C. The results showed that the adsorption of PCP in purple cabbage extraction solution onto LSA-21 macro porous adsorbent resin is highly in agreement with both Langmuir and Freundlich models. Heat of adsorption (ΔH) value of 11.976 kJ/mol indicates the endothermic adsorption process. A decrease of Gibbs free energy (ΔG) with temperature increase also indicates the spontaneous nature of the process.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 1987-1990
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.1987
• Online since: May 2011
• Authors: Jian Hua Yi, Zhen Bao Zhu, Yuan Fang Wu
• Keywords: Adsorption, Kinetic, Macro Porous Adsorbent Resin, Purple Cabbage

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