Sawdust Derivative for Environmental Application: Chemistry, Functionalization and Removal of textile dye from aqueous solution
AUTOR(ES)
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.
FONTE
An. Acad. Bras. Ciênc.
DATA DE PUBLICAÇÃO
25/08/2016
RESUMO
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%.
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