Equilibrium and kinetic studies of ferulic acid adsorption by Amberlite XAD-16

► Amberlite XAD-16 removed ferulic acid from aqueous solution. ► Acid conditions enhance the adsorption capacity. ► The rate-limiting step for the adsorption kinetics was the intraparticle diffusion. Ferulic acid (FA) is a valuable organic antioxidant, which is contained in various grains and fruits...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2012-02, Vol.183, p.112-116
Main Authors: Dávila-Guzman, N.E., Cerino-Córdova, F.J., Diaz-Flores, P.E., Rangel-Mendez, J.R., Sánchez-González, M.N., Soto-Regalado, E.
Format: Article
Language:English
Subjects:
adsorbents
Adsorption
Adsorption mechanism
antioxidants
chemical engineering
Ferulic acid
food industry
fruits
grains
Kinetics
sorption isotherms
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Summary:► Amberlite XAD-16 removed ferulic acid from aqueous solution. ► Acid conditions enhance the adsorption capacity. ► The rate-limiting step for the adsorption kinetics was the intraparticle diffusion. Ferulic acid (FA) is a valuable organic antioxidant, which is contained in various grains and fruits. FA is usually found in water streams of food industry. In order to find an alternative method for recovery of FA, this study was focused in adsorption of FA on XAD-16. The pH effect (2–8) and the contact time effect (1–180min) on adsorption capacity were evaluated. The adsorption capacity was highly dependent on pH and the maximum adsorption capacity was found at pH 3 (133mgFA/g): the adsorption process was well described by the Freundlich isotherm model. Moreover, the adsorption kinetics were conducted by a rapid initial uptake (0–20min), followed by a slow approach to equilibrium (20–90min). The kinetic studies showed that the adsorption rate was well described by the Crank model (deviation
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2011.12.037