Anais da Academia Brasileira de Ciências (Jan 2016)

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

  • THAIS F. PINTO,
  • CÍCERO W.B. BEZERRA,
  • DOMINGOS S.A. SILVA,
  • EDSON C. DA SILVA FILHO,
  • ADRIANA P. VIEIRA,
  • CLAUDIO AIROLDI,
  • JÚLIO C.P. DE MELO,
  • HILDO A.S. SILVA,
  • SIRLANE A.A. SANTANA

DOI
https://doi.org/10.1590/0001-3765201620140656
Journal volume & issue
no. 0

Abstract

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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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