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| Adsorption thermodynamics of total flavonoids from peanut hull by macroporous resin |
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| DOI： |
| KeyWord:macroporous resin peanut hull total flavonoids adsorption thermodynamics |
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| Abstract: |
| Through static adsorption experiments, thermodynamic characteristics of adsorption process were studied by choosing AB-8 type macroporous resin for adsorption of total flavonoids from peanut hull. The adsorption enthalpy variable ΔH, the entropy variable ΔS and the free energy variable ΔG in the adsorption process were calculated by using the thermodynamic function on the basis of the adsorption isotherm of Freundlich, Langmuir and Temkin. The results showed that the adsorption was a physical process; Freundlich adsorption isotherm model could reliably reflect the adsorption process, and the characteristic parameters n value under the five different temperatures including 20，25，30，35，40?℃ were higher than 1, indicating that the adsorption was a preferential adsorption. In the process of adsorption, the enthalpy variable ΔH>0, which had nothing to do with the temperature, the entropy variable ΔS>0 and the free energy variable ΔG<0, indicating that the adsorption was a spontaneous endothermic process driven by entropy. |
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