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ARTÍCULO
TITULO

Evaluation of the adsorption capacity of orange 16 reactive dye for chitosan

Irene Yukiko Kimura    
Valfredo Tadeu de Fávere    
Mauro César Marghetti Laranjeira    
Atche Josué    
Amauri do Nascimento (Author)    

Resumen

Chitosan (87.2% NH2) was employed as adsorbent for the orange 16 reactive dye in an aqueous medium. The dye is used in textile dyeing. Isotherms of adsorption were determined according to variations of pH and the initial concentration of the dye. Results of adsorption experiments were analyzed with Langmuir isotherm and indicated an increase of adsorption capacity with pH decrease. This effect is attributed to the increase of -NH3+ groups of the chitosan in acid medium, producing a strong interaction between the cationic group from the chitosan and -SO3- group of the dye. Values for qm were 1613 mg/g (pH 2.0) and 310 mg/g (pH 10.0).

PÁGINAS
pp. 1161 - 1166
REVISTAS SIMILARES
Applied Sciences
Water
Coatings

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