Adsorption/desorption characteristics and separation of anthocyanins and polyphenols from blueberries using macroporous adsorbent resins

Biosorption of anthocyanins from grape pomace extracts by waste yeast: kinetic and isotherm studies

“…Biosorption process may have occurred in several layers with a non-uniform distribution of adsorption heat and affinity on the heterogeneous surface (Foo and Hameed, 2010). Buran et al (2014) studied the adsorption of anthocyanins extracted from blueberry (Vaccinium myrtillus) by three different resins as adsorbents and reported q e values of 1.37 mg g À1 , 2.07 mg g À1 and 2.01 mg g À1 . These results are in the range of those obtained in the present study.…”

Extraction and purification of anthocyanins from purple-fleshed potato

“…However, too high acid concentration leads to hydrolysis A c c e p t e d M a n u s c r i p t 6 of acylated anthocyanins; consequently, a decrease in pH to approximately three by acid addition provides favorable conditions for extraction as, at this pH, anthocyanins are in a stable flavylium ion form [14]. Different acids such as hydrochloric, malic, tartaric, ascorbic, citric, and acetic acid have been used to adjust pH [4,[9][10][11][12][15][16][17][18]. Of these, acetic acid is the most suitable when anthocyanins are to be used in the food and beverage industries.…”

“…The extraction and adsorptive purification of these anthocyanins were investigated. The main emphasis was on the adsorptive purification as the extraction of anthocyanins from various raw materials has been investigated extensively [5,9,[11][12][13][14][15][16][17][18]. Thus, only a limited study of extraction was conducted here to find extraction conditions in which sufficient anthocyanin yield could be obtained.…”

Optimation of Enrichment and Purification of Polyphenols From Blueberries (Vaccinium Spp.) by Macroporous Resins Xad-7hp

“…The correlation coefficients for the Langmuir model are higher than those of the Freundlich model, showing that the former better fits the data, and also indicating that the adsorption of polyphenols by XAD-7HP occurs via monomolecular layer formation. Buran et al (Buran et al, 2014) and Sun et al (Suna et al, 2015) also found that the adsorption equilibrium was best described by the Langmuir model. In the Langmuir model, the theoretical maximum adsorption capacity (Q m ) decreases as the temperature increases, indicating that adsorption is an exothermic process.…”