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- W1920791369 abstract "The aim of the study is to examine the adsorption capacity of hydroxycinnamic compounds (ferulic acid, p-coumaric acid, cinnamic acid) on zeolite adsorbents (FAU- and *BEA-type structure) versus Amberlite resin XAD16. The pH and contact time effects on adsorption were evaluated. The adsorption capacity was dependent on pH and higher at pH less than pKa1. The kinetic adsorption is faster onto FAU and *BEA zeolites than onto XAD16 resin. Maximum adsorption capacities were calculated for the target compounds for pH=3.5 by using the Langmuir isotherm model. They reached higher values for zeolites than for XAD16 and are respectively of 139, 122 and 109 mg g-1 for ferulic, p-coumaric and cinnamic acids. Values around 30 mg g-1 were observed for XAD16. Desorption ratios are close to 100 % for *BEA zeolite and XAD16 resin in the presence of ethanol 96 %. The use of regenerated zeolites leads to a loss of adsorption capacities of 30 % for the cinnamic acid and 20 % for the two other acids. It was concluded that *BEA zeolites are particularly interesting adsorbants to isolate the hydroxycinnamic compounds from vegetal extracts." @default.
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- W1920791369 date "2015-11-01" @default.
- W1920791369 modified "2023-09-30" @default.
- W1920791369 title "Recovery of hydroxycinnamic acids from renewable resources by adsorption on zeolites" @default.
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- W1920791369 doi "https://doi.org/10.1016/j.cej.2015.06.009" @default.
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