Equilibrium studies of adsorption of amino acids on NaZSM-5 zeolite

The adsorption of amino acids such as phenylalanine, alanine, tyrosine and tryptophan on highly hydrophobic NaZSM-5 zeolite were studied. Selective adsorption of phenylalanine and tyrosine were observed. The single component adsorption isotherms were fitted in Langmuir model. For the amino acids con...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2003-08, Vol.223 (1), p.55-61
Main Authors: Titus, E., Kalkar, A.K., Gaikar, V.G.
Format: Article
Language:English
Subjects:
Adsorption
Aminoacids
Separation
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Summary:The adsorption of amino acids such as phenylalanine, alanine, tyrosine and tryptophan on highly hydrophobic NaZSM-5 zeolite were studied. Selective adsorption of phenylalanine and tyrosine were observed. The single component adsorption isotherms were fitted in Langmuir model. For the amino acids considered in this work, the isotherms are essentially independent of pH, but they vary significantly with the temperature. Heats of adsorption were obtained from van't Hoff plots of the Henry's law constant limit of the Langmuir isotherm and found to be higher for more hydrophobic solute.
ISSN:0927-7757
1873-4359
DOI:10.1016/S0927-7757(03)00131-6