An alternative Avrami equation to evaluate kinetic parameters of the interaction of Hg(II) with thin chitosan membranes.
J Colloid Interface Sci
; 263(2): 542-7, 2003 Jul 15.
Article
em En
| MEDLINE
| ID: mdl-12909046
In this work, thin chitosan membranes were utilized as an adsorbent for the removal of Hg(II) from aqueous solutions. A rise of temperature accelerates the mass transfer of Hg(II) to the membranes, surfaces. The kinetic data did not present a good fitting to the traditional Lagergren adsorption kinetic equations. An alternative Avrami kinetic equation was employed and successfully fitted to the kinetic adsorption quantities. From this new equation, two regions presenting distinct kinectic parameters were found, and the use of the parameter n was also relationed to the determination of the kinetic order. Variations of the adsorption kinetic rate in relation to the time, the initial Hg(II) concentration, and the temperature were also calculated and are discussed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Quitina
/
Mercúrio
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Estados Unidos