Adsorption behavior study of polyphenols and flavonoids in Moringa oleifera Lam. On three macroporous resins

The adsorption behavior of polyphenols and flavonoids from Moringa oleifera Lam. on three macroporous resins (AB-8, D-101, and NKA-9) were investigated. The AB-8 macroporous resin exhibited the optimal adsorption performance for polyphenols and flavonoids. The adsorption behavior of polyphenols and flavonoids on AB-8 resin conforms to the pseudo-second-order kinetic (R² > 0.98) and Freundlich isothermal adsorption models. The AB-8 resin exhibits a typical S-shaped breakthrough curve for the target components. For polyphenols, the breakthrough point and saturation point are reached at an effluent volume of 40 mL and 130 mL with a dynamic adsorption capacity of 0.18 mg/g, respectively. For flavonoids, the breakthrough point and the saturation point occur at 43 mL and 110 mL with a dynamic adsorption capacity of 10.4 mg/g, respectively. This study establishes a theoretical foundation and technical support for the industrial purification and sustainable development of bioactive components in natural product resources from an energy conservation standpoint.