title: Sawdust Derivative for Environmental Application: Chemistry, Functionalization and Removal of textile dye from aqueous solution.
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%.
authors: Departamento de Química/CCET, Universidade Federal do Maranhão, Avenida dos Portugueses, s/n, Campus do Bacanga, 65080-540 São Luís, MA, Brasil.
authors: Thais F
authors: TF
authors: Pinto
authors: Departamento de Química/CCET, Universidade Federal do Maranhão, Avenida dos Portugueses, s/n, Campus do Bacanga, 65080-540 São Luís, MA, Brasil.
authors: Cícero W B
authors: CW
authors: Bezerra
authors: Departamento de Química/CCET, Universidade Federal do Maranhão, Avenida dos Portugueses, s/n, Campus do Bacanga, 65080-540 São Luís, MA, Brasil.
authors: Domingos S A
authors: DS
authors: Silva
authors: Centro de Ciências da Natureza, Universidade Federal do Piauí, Avenida Universitária, s/n, Campus Universitário Ministro Petrônio Portella, 64049-550 Teresina, PI, Brasil.
authors: Edson C DA
authors: EC
authors: Silva
authors: Instituto de Química, Universidade , Rua Carlos Gomes, 241, Cidade Universitária Zeferino Vaz, 13083-970 Campinas, SP, Brasil.
authors: Adriana P
authors: AP
authors: Vieira
authors: Instituto de Química, Universidade , Rua Carlos Gomes, 241, Cidade Universitária Zeferino Vaz, 13083-970 Campinas, SP, Brasil.
authors: Claudio
authors: C
authors: Airoldi
authors: Instituto de Química, Universidade , Rua Carlos Gomes, 241, Cidade Universitária Zeferino Vaz, 13083-970 Campinas, SP, Brasil.
authors: Júlio C P DE
authors: JC
authors: Melo
authors: Departamento de Química/CCET, Universidade Federal do Maranhão, Avenida dos Portugueses, s/n, Campus do Bacanga, 65080-540 São Luís, MA, Brasil.
authors: Hildo A S
authors: HA
authors: Silva
authors: Departamento de Química/CCET, Universidade Federal do Maranhão, Avenida dos Portugueses, s/n, Campus do Bacanga, 65080-540 São Luís, MA, Brasil.
authors: Sirlane A A
authors: SA
authors: Santana