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Extraction of polydatin and resveratrol from Polygonum cuspidatum root: Kinetics and modeling

Paper ID Volume ID Publish Year Pages File Format Full-Text
18945 43037 2015 7 PDF Available
Title
Extraction of polydatin and resveratrol from Polygonum cuspidatum root: Kinetics and modeling
Abstract

•We optimize the extraction of polydatin and resveratrol in agitation extractions.•The effect of several extraction process parameters has been discussed.•The extraction kinetics and modeling data have been investigated.•The kinetic model is in a good agreement with the experimental results.•The values of activation energy for the extraction kinetics are obtained.

The biochemical activities of polydatin and resveratrol have been proven to own considerable medicinal potential. However, the extraction processes are yet to be fully characterized. This study explores particularly the optimization and kinetics of polydatin and resveratrol extraction from Rhizoma Et Radix Polygoni Cuspidati (the root of Polygonum cuspidatum) in agitation extractions by ethanol and water mixtures. The effects of the parameters on several extraction processes have been fully investigated. The optimized condition for polydatin was found at 0.4 mole fraction of ethanol as the extraction solvents, temperature 323 K, agitation speed 500 rpm and solid to solvent ratio of 1:90. However, the optimized condition for resveratrol was 0.4 mole fraction of ethanol, temperature 323 K, agitation speed 800 rpm, solid to solvent ratio of 1:120. Furthermore, the extraction kinetics behavior of polydatin and resveratrol follows a first order kinetics with diffusion coefficient ranging from 3.59 × 10−11 to 7.53 × 10−11 m2 s−1 and 3.90 × 10−11 to 10.10 × 10−11 m2 s−1 for polydatin and resveratrol respectively. The values of activation energy for the extraction were found to be 3.96 kJ mol−1 for polydatin and 17.83 kJ mol−1 for resveratrol.

Keywords
PC, Polygonum cuspidatum; POLY, polydatin; RES, resveratrol; Cl,exp,i, experimental concentration of the component in the liquid phase at time t; Cl,pre,i, predicted concentration of the component in the liquid phase at time t; N, number of observations;
First Page Preview
Extraction of polydatin and resveratrol from Polygonum cuspidatum root: Kinetics and modeling
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 94, April 2015, Pages 518–524
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering