Sawdust Derivative for Environmental Application: Chemistry, Functionalization and Removal of textile dye from aqueous solution

• Autor(a) principal: PINTO,THAIS F.
• Data de Publicação: 2016
• Outros Autores: 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.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Anais da Academia Brasileira de Ciências (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401212
• topic: wood sawdust; adsorption; textile dye; succinic anhydride

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 of dye textile from aqueous solutions, and under conditions studied the removal percentage achieved was 51.7%.