Format

Send to

Choose Destination
See comment in PubMed Commons below
J Colloid Interface Sci. 2007 Nov 15;315(2):407-14. Epub 2007 Jul 10.

Adsorption properties of tea polyphenols onto three polymeric adsorbents with amide group.

Author information

  • 1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China. klhuang@mail.csu.edu.cn

Abstract

Macroporous crosslinked poly(N-methyl-N-p-vinylbenzylacetamide) (PMVBA), poly(N-methyl-N-p-vinylbenzylurea) (PMVBU), and poly(N-methylacrylamide) (PMA) were prepared and their adsorption behaviors for tea polyphenols (TP) were investigated in aqueous solution. The results indicated that their adsorption capacities for TP followed an order as: PMVBU>PMVBA>PMA. The adsorption isotherms were fitted to Freundlich isotherm and adsorption enthalpies were calculated. It was found that Freundlich isotherm was suitable to characterize the adsorption process and their adsorption enthalpies for TP gave the same order as: PMVBU>PMVBA>PMA. Surface energy heterogeneity was analyzed by Do's model and the surface of PMVBU was shown to be the most homogeneous. Analysis of adsorption mechanism suggested that multiple hydrogen bonding, hydrophobic interaction, and pi-pi stacking were responsible for the adsorption of TP onto the adsorbents.

PMID:
17681514
DOI:
10.1016/j.jcis.2007.07.005
[PubMed]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center