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Reference type: Journal
Authors: He KC, Qiu FX, Qin J, Yan J, Yang DY
Article Title: Selective adsorption of L-TA/D-TA by β-cyclodextrin derivative modified with l-tryptophan: Isotherm, kinetic and thermodynamics studies.
Publication date: 2014
Journal: Journal of Industrial and Engineering Chemistry
Volume: 20
Issue: (4)
Page numbers: 1293-1300.
DOI: 10.1016/j.jiec.2013.07.008
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1226086X13003055

Abstract: β-cyclodextrin derivative modified with L-Tryptophan (L-Trp-CD) was prepared for recognitive chiral separation of tartaric acid enantiomers from ethanol solution. Kinetic properties were successfully investigated by pseudo-first-order model and pseudo-second-order model. Equilibrium data were described by the Langmuir and Freundlich isotherm models. The thermodynamics parameters (positive values of Δ Ho and Δ So, negative values of Δ Go) indicated that binding system for L-Trp-CD was endothermic, entropy gained and spontaneous. Selective adsorption result of L-Tartaric acid (L-TA)/D-Tartaric acid (D-TA) by L-Trp-CD indicated that L-Trp-CD has significantly higher adsorption capacity for L-TA compared with D-TA, and the selectivity coefficient is 3.36
Template and target information: tartaric acid
Author keywords: β-cyclodextrin, Tartaric acid, adsorption isotherm, kinetic model, Thermodynamics parameters

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