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    Kafirin Adsorption on Ion-Exchange resins: Isotherm and Kinetic Studies

    Access Status
    Fulltext not available
    Authors
    Kumar, P.
    Lau, P.
    Kale, S.
    Johnson, Stuart
    Pareek, Vishnu
    Utikar, Ranjeet
    Lali, A.
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Kumar, P. and Lau, P. and Kale, S. and Johnson, S. and Pareek, V. and Utikar, R. and Lali, A. 2014. Kafirin Adsorption on Ion-Exchange resins: Isotherm and Kinetic Studies. Journal of Chromatography A. 1356: pp. 105-116.
    Source Title
    Journal of Chromatography A
    DOI
    10.1016/j.chroma.2014.06.035
    ISSN
    0021-9673
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/21014
    Collection
    • Curtin Research Publications
    Abstract

    Today kafirin is found to be useful in designing delayed delivery systems and coatings of pharmaceuticals and nutraceuticals where its purity is important and this can be obtained by adsorptive chromatography. This study is the first scientific insight into the isotherm and kinetic studies of kafirin adsorption on anion-and cation-exchange resins for practical applications in preparative scale chromatography. Adsorption isotherms of kafirin were determined for five anion- and two cation-exchange resins in batch systems. Isotherm parameters such as maximum binding capacity and dissociation constant were determined from Langmuir isotherm, and adsorptive capacity and affinity constant from Freundlich isotherm. Langmuir isotherm was found to fit the adsorption equilibrium data well. Batch uptake kinetics for kafirin adsorption on these resins was also carried out and critical parameters including the diffusion coefficient, film mass transfer coefficient, and Biot number for film-pore diffusion model were calculated. Both the isotherm and the kinetic parameters were considered for selection of appropriate resin for kafirin purification. UNOsphere Q (78.26 mg/ml) and Toyopearl SP-650M (57.4 mg/ml) were found to offer better kafirin binding capacities and interaction strength with excellent uptake kinetics under moderate operating conditions. With these adsorbents, film diffusion resistance was found to be major governing factor for adsorption (Bi < 10 and δ < 1). Based on designer objective function, UNOsphere Q was found be best adsorbent for binding of kafirin. The data presented is valuable for designing large scale preparative adsorptive chromatographic kafirin purification systems.

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