Removal of methylene blue dye from an aqueous media using superabsorbent hydrogel supported on modified polysaccharide.
J Colloid Interface Sci
; 301(1): 55-62, 2006 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-16740270
The removal of methylene blue (MB) in water with the superabsorbent hydrogel (SH) formed by modified gum arabic, polyacrylate, and polyacrylamide was investigated. The SH exhibited excellent performance in MB absorption. The maximum absorption capacity was 48 mg of the dye per g of SH, representing 98% of the MB removed. Experimental parameters were used as follows: pH 8, hydrogel mass 50 mg, and initial concentration of MB 50 mg L(-1). In a procedure with an individual solution of orange II, an opposite effect related to the MB was observed: the hydrogel only absorbed water, resulting in an orange II-richer solution. The orange II concentration in solution increased about 50 times (relative to the initial concentration). In another experiment using an aqueous mixture of orange II and MB, the SH absorbed the MB exclusively. Compared to the MB, the orange II is separated from water by SH selectivity-absorption through an inverse process. This effect was attributed to the formation of a ionic complex between the imine groups of MB and the ionized carboxylic groups of SH.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polissacarídeos
/
Têxteis
/
Poluentes Químicos da Água
/
Água
/
Hidrogel de Polietilenoglicol-Dimetacrilato
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Corantes
/
Azul de Metileno
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Estados Unidos