Lycium ruthenicum Murr. polyphenols adsorption separation properties and oxidation resistance
WU Yun1*, WANG Chunlin2, WANG Lipeng1, ZHANG Lala1, HU Haobin1
1(College of Life Science and Technology,Longdong University,Qingyang 745000,China) 2(College of Chemistry and Chemical Engineering,Longdong University,Qingyang 745000,China)
Abstract: In order to study the adsorption separation and oxidation properties of Lycium ruthenicum Murr.Polyphenols,the static adsorption method was adopted to screen nine different types of macroporous resins.The static adsorption kinetics and thermodynamics of HPD500 macroporous resin on Lycium ruthenicum polyphenols were studied to explore the adsorption mechanism of HPD500 resin.Dynamic purification process and oxidation resistance were also investigated.The results showed that HPD500 macroporous resin showed better adsorption performance than others.The adsorption process was consistent with the pseudo-second-order model and was mainly controlled by the chemical reaction model.Langmuir model could accurately describe the adsorption behavior of HPD500 macroporous resin in the temperature range investigated,and ΔH＜0、ΔG＜0、ΔS＜0 indicating that it was a spontaneous exothermic and entropy-decreasing adsorption process.The optimum purification parameters of dynamic adsorption and desorption were as follow:8 BV of was loaded onto the column at a flow rate of 2.4 BV/h and eluted with 6 BV of 60% ethanol with the same flow rate.Under these conditions,the purity of polyphenols purified increased 2.36 times than control.Oxidation resistance tests showed that purified polyphenols from Lycium ruthenicum espectively.It would promote the development and utilization of Lycium ruthenicum Murr.and lengthen its industrial production chain.
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2021, Vol. 47 
