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| Adsorption kinetics of flavonoids from peanut hull by macroporous resin |
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| DOI： |
| KeyWord:peanut hull flavonoids macroporous resin adsorption kinetics |
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| Abstract: |
| With peanut hull as raw material， flavonoids were extracted from peanut hull by ethanol and were adsorbed by macroporous resin. The effects of temperature on the adsorption capacity were studied， and the static adsorption kinetics curve was drawn. According to the static equilibrium adsorption amount ，three kinds of adsorption kinetics fitting curves were drawn， including inter-particle diffusion， pseudo-first-order adsorption and pseudo-second-order adsorption， and three kinds of kinetics model parameters were calculated. The results showed that temperature had significant effect on the adsorption capacity of peanut hull flavonoids by macroporous resin， and the process was an endothermic process. The adsorption rate was controlled by the diffusion of liquid film and the inter-particle diffusion. The pseudo-first-order kinetics model for the adsorption of peanut hull flavonoids by macroporous resin was determined. The activation energy (Ea) was 7.96 kJ/mol calculated by the Arrhenius formula， and it was a physical process. |
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