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:10.1590/0001-3765201620140656

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

An Acad Bras Cienc. 2016 Sep;88(3):1212-20. doi: 10.1590/0001-3765201620140656. Epub 2016 Aug 25.

Authors

Thais F Pinto¹, Cícero W B Bezerra¹, Domingos S A Silva¹, Edson C DA Silva Filho², Adriana P Vieira³, Claudio Airoldi³, Júlio C P DE Melo³, Hildo A S Silva¹, Sirlane A A Santana¹

Affiliations

¹ Departamento de Química/CCET, Universidade Federal do Maranhão, Avenida dos Portugueses, s/n, Campus do Bacanga, 65080-540 São Luís, MA, Brasil.
² Centro de Ciências da Natureza, Universidade Federal do Piauí, Avenida Universitária, s/n, Campus Universitário Ministro Petrônio Portella, 64049-550 Teresina, PI, Brasil.
³ Instituto de Química, Universidade , Rua Carlos Gomes, 241, Cidade Universitária Zeferino Vaz, 13083-970 Campinas, SP, Brasil.

PMID: 27580360
DOI: 10.1590/0001-3765201620140656

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%.