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| PINTO,THAIS F.; BEZERRA,CÍCERO W.B.; SILVA,DOMINGOS S.A.; SILVA FILHO,EDSON C. DA; VIEIRA,ADRIANA P.; AIROLDI,CLAUDIO; MELO,JÚLIO C.P. DE; SILVA,HILDO A.S.; SANTANA,SIRLANE A.A.. |
| ABSTRACT The adsorption of Violet Remazol 5R (VR 5) on wood sawdust modified with succinic anhydride (SSA) as a function of contact time, pH, and initial dye concentrations was investigated using a batch technique under ambient conditions. The SSA obtained was confirmed by IR spectroscopy, thermogravimetry and 13C NMR, and degrees of substitution (DS) were calculated. A study on the effect of the pH on the adsorption of VR 5 showed that the optimum pH was 2.0. The interactions were assayed with respect to the pseudo-first-order and pseudo-second-order kinetic models, and were found to follow closely the pseudo-second-order. The isotherm was adjusted to the Langmuir, the Freundlich and the Temkin sorption models. SSA is a promising material for the removal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wood sawdust; Adsorption; Textile dye; Succinic anhydride. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401212 |
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