Enhanced removal of Orange G from aqueous solutions by modified chitosan beads: Performance and mechanism.
Int J Biol Macromol
; 133: 1260-1267, 2019 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-31047925
ABSTRACT
Grafting of crosslinked chitosan with monomer, N-vinyl-2-pyrrolidone, has been carried out to investigate its adsorption capacity toward Orange G (OG) from aqueous solutions. The adsorption performance of modified chitosan (cts(x)-g-PNVP) was examined and compared with that of the unmodified chitosan. The effects of initial pH, contact time and initial dye concentration were investigated in a batch system. The experimental data were correlated with the Langmuir and Freundlich isotherm models. The maximum adsorption capacity of cts(x)-g-PNVP (63.7mgg-1) based on Langmuir equation was relatively higher than that of the unmodified chitosan (1.7mgg-1). The kinetic studies showed that the adsorption process was consistent with the pseudo-second order kinetic model. Interaction mechanisms between OG and cts(x)-g-PNVP were also proposed. The overall results suggested that the prepared cts(x)-g-PNVP stands a good candidate as adsorbent for removal of anionic dye from aqueous solutions.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Compuestos Azo
/
Agua
/
Purificación del Agua
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Quitosano
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Microesferas
Idioma:
En
Revista:
Int J Biol Macromol
Año:
2019
Tipo del documento:
Article
País de afiliación:
Malasia