The ultrasound assisted purification of asparagus polyphenols by adsorption and desorption on the macroporous resins was investigated. The ultrasound within the selected intensities (12-120 W) and temperatures (25-35 °C) increased the adsorption and desorption capacities of asparagus polyphenols on D101 resins. Higher ultrasound intensity (120 W) and lower temperature (25 °C) benefited the adsorption process and the adsorption capacity of total polyphenols after ultrasound was 3.95 mg/g, which was 2 times than that obtained after shaking at 120 rpm. Meanwhile, ultrasound can significantly shorten the equilibrium time and the adsorption process of asparagus polyphenols could be well described by Pseudo-second order model and Freundlich model. Stereoscopic microscope was first used to investigate the microstructure characterization of resins, indicating that ultrasound mainly enhanced the surface roughness of resins. Interestingly, rutin possessed the highest adsorption capacities and ferulic acid had the highest the desorption capacities among the studied individual polyphenols. The obtained results evidenced on a progressive insight of application of ultrasound assisted resins for purification of asparagus polyphenols.

中文翻译：

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超声波辅助使用树脂进行吸附和解吸的芦笋多酚利用新工艺。

通过对大孔树脂的吸附和解吸，研究了超声辅助纯化芦笋多酚的方法。在选定的强度（12-120 W）和温度（25-35°C）内的超声波提高了芦笋多酚在D101树脂上的吸附和解吸能力。较高的超声强度（120 W）和较低的温度（25°C）有利于吸附过程，超声后总多酚的吸附容量为3.95 mg / g，比以120 rpm摇动后的吸附量高2倍。同时，超声可以显着缩短平衡时间，芦笋多酚的吸附过程可以用伪二级模型和弗氏模型很好地描述。立体显微镜首先用于研究树脂的微观结构表征，表明超声波主要增强了树脂的表面粗糙度。有趣的是，在所研究的各个多酚中，芦丁具有最高的吸附能力，而阿魏酸具有最高的解吸能力。获得的结果证明了在超声辅助树脂纯化芦笋多酚中的应用的渐进见解。