Foam fractionation for effective recovery of resveratrol from the leaching liquor of  Polygonum cuspidatum  by using partially ethylated β-cyclodextrin as collector and frother

Liu, Wei; Lv, Yanna; Tian, Shuang; Zhang, Mengwei; Shu, Ting; Hu, Nan; Wu, Zhaoliang

doi:10.1016/j.indcrop.2017.12.035

Cited by 10 publications

(1 citation statement)

References 38 publications

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“…Foam fractionation is such a cost-effective method that uses bubbles as media to separate various compounds with or without surface activity from their diluted aqueous solutions [10,11]. It has high efficiency, low-cost, and is pollution free, so it is widely used in the separation of high-value natural compounds from plants [12,13]. On this ground, we will attempt to use foam fractionation to separate anthraquinones from the aqueous extract of Semen Cassiae.…”

Section: Introductionmentioning

confidence: 99%

Separation of Protein-Binding Anthraquinones from Semen Cassiae Using Two-Stage Foam Fractionation

Ding

Wang²,

Yue

et al. 2019

Processes

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Anthraquinones are compounds of high medicinal value in many plants. Based on their good protein binding affinity, foam fractionation was attempted to separate them using proteins in the aqueous extract of Semen Cassiae as collectors. Firstly, the interaction between anthraquinones and Semen Cassiae proteins has been analyzed by the Stem–Volmer equation with physcion as a standard. The results show that physcion had good interaction with the proteins via hydrophobic forces. More importantly, the proteins effectively assisted the foam fractionation of several anthraquinones including aurantio-obtusifolin, aloe-emodin, rhein, emodin, chrysophanol, and physcion. On this basis, a two-stage foam fractionation technology was developed for process intensification using a foam fractionation with vertical sieve trays (VSTs). VSTs, initial feed concentration of total anthraquinones, temperature, volumetric air flow rate and pore diameter of gas distributor had significant effects on enrichment ratio and recovery yield of anthraquinones. Under suitable conditions, the enrichment ratio of total anthraquinones reached 47.0 ± 4.5 with a concentration of 939 ± 94 mg/L in the foamate while their total recovery percentage reached more than 47.7%. In addition, foam fractionation also increased the purity and hydroxyl radical scavenging activity of total anthraquinones. The results had significant implications for the separation of anthraquinones from Semen Cassiae.

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