In-situ preparation of NaA zeolite/chitosan porous hybrid beads for removal of ammonium from aqueous solution.
Carbohydr Polym
; 107: 103-9, 2014 Jul 17.
Article
em En
| MEDLINE
| ID: mdl-24702924
ABSTRACT
Inorganic/organic hybrid materials play important roles in removal of contaminants from wastewater. Herein, we used the natural materials of halloysite and chitosan to prepare a new adsorbent of NaA zeolite/chitosan porous hybrid beads by in-situ hydrothermal synthesis method. SEM indicated that the porous hybrid beads were composed of 6-8 µm sized cubic NaA zeolite particles congregated together with chitosan. The adsorption behavior of NH4(+) from aqueous solution onto hybrid beads was investigated at different conditions. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. A maximum adsorption capacity of 47.62 mg/g at 298 K was achieved according to Langmuir model. The regenerated or reused experiments indicated that the adsorption capacity of the hybrid beads could maintain in 90% above after 10 successive adsorption-desorption cycles. The high adsorption and reusable ability implied potential application of the hybrid beads for removing NH4(+) pollutants from wastewater.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Água
/
Zeolitas
/
Quitosana
/
Compostos de Amônio
/
Microesferas
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article