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Adsorption affinity of tea catechins onto polymeric resins: Interpretation from molecular orbital theory

Paper ID Volume ID Publish Year Pages File Format Full-Text
3883 197 2010 7 PDF Available
Title
Adsorption affinity of tea catechins onto polymeric resins: Interpretation from molecular orbital theory
Abstract

Adsorption of certain tea catechins such as (+) catechin (C), (−) epicatechin (EC), (+) gallocatechin (GC), (−) epigallocatechin (EGC), (+) catechin gallate (CG), (−) epicatechin gallate (ECG), (+) gallocatechin gallate (GCG), and (−) epigallocatechin gallate (EGCG) have been studied using three types of polymeric resins as adsorbents. Adsorption affinity expressed as the slope of the linear region of the isotherm for a solute is found to be different for different adsorbents, and this difference can be interpreted from the chemical nature of the sorbents. Molecular interactions on polymeric resins have been studied based on molecular orbital theory. Electronic states of adsorbent and adsorbate were calculated using the semiempirical molecular orbital (MO) method from which energy of adsorption in aqueous solution was estimated. The adsorptive interaction on the polymeric resins computed on the basis of frontier orbital theory seems to correlate well with the experimentally measured adsorption affinity and enthalpy.

Keywords
Adsorptive interaction; Adsorption enthalpy; MO calculations; Frontier orbital theory; Polymeric resins; Tea catechins
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Adsorption affinity of tea catechins onto polymeric resins: Interpretation from molecular orbital theory
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 52, Issues 2–3, 15 November 2010, Pages 144–150
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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