A new guar gum-based adsorbent for the removal of Hg(II) from its aqueous solutions.
Carbohydr Polym
; 106: 276-82, 2014 Jun 15.
Article
en En
| MEDLINE
| ID: mdl-24721079
ABSTRACT
Modification of biopolymers by oxidation is an easy process to develop effective adsorbents for the removal of toxic metal ions from their aqueous solutions. In the present study, guar gum (GG) was crosslinked with epichlorohydrin and then oxidized to the polydialdehyde form (GG-clPDA). The latter was converted to a Schiff-base, GG-clCHN(CH2)6NCHGG, by reaction with hexamethylenediamine. Different forms of the modified GG were characterized by SEM, FTIR and XRD and investigated as adsorbents for the removal of Hg(II) ions from their aqueous solutions. The adsorption process was carried out through the variation of time, temperature, pH and initial concentration of Hg(II) ions. GG-clCHN(CH2)6NCHGG was observed to be an efficient adsorbent with a maximum adsorption capacity of 41.13 mg/g. It is reusable up to five cycles at the optimum conditions obtained for the maximum ions uptake. The kinetic data generated fit the Freundlich isotherm and pseudo-second order kinetics.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Bases de Schiff
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Contaminantes Químicos del Agua
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Compuestos de Mercurio
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Purificación del Agua
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Gomas de Plantas
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Galactanos
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Mananos
Idioma:
En
Revista:
Carbohydr Polym
Año:
2014
Tipo del documento:
Article
País de afiliación:
India