| Titre : | The fixed-bed study of dye removal on chitosan beads at high pH (2008) |
| Auteurs : | Dan Xu, Auteur ; San Hein, Auteur ; Sunsun Leslie Loo, Auteur ; Kean Wang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 n°22, Novembre 2008) |
| Article en page(s) : | p. 8796–8800 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Beads High pH |
| Résumé : | Chitosan hydrogel beads were modified with ammonium sulfate to remove a dye (Acid Orange-7) in aqueous solutions at pH 8.2. The modified beads present much higher sorption capacity than the native beads in the basic solution. The sorption equilibrium was measured in a batch adsorber, and kinetics was investigated in a fixed bed rig. The breakthrough curves were found to be J-shaped in general and were modeled by the Wheeler−Jonas equation with a two-segmented approach. Analysis shows that the kinetics is controlled by film resistance and intraparticle diffusion in each segment, respectively. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie800387z |
