Decolorization of textile azo dye Reactive Red 239 by the novel strain Shewanella xiamenensis G5-03 isolated from contaminated soil

• Autor(a) principal: Cossolin,Aline Silva
• Data de Publicação: 2019
• Outros Autores: Reis,Hélen Cristina Oliveira dos, Castro,Ketinny Camargo de, Santos,Bruna Assis Paim dos, Marques,Matheus Zimermann, Parizotto,Carlos Adriano, Dall´Oglio,Evandro Luiz, Vasconcelos,Leonardo Gomes de, Morais,Eduardo Beraldo de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Ambiente & Água
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2019000600309
• topic: bacterium; biodegradation; FTIR; kinetic study; Reactive Red 239.

Abstract Shewanella xiamenensis G5-03 isolated from contaminated landfill soil efficiently decolorized five textile azo dyes under static conditions. One of them, Reactive Red 239 (RR239), was completely decolorized at a pH range of 7 to 11 (at 35°C) within 3-6 h. The bacterium was also efficiently decolorized RR239 in a wide temperature range of 25-40°C (at pH 8). The kinetics of RR239 decolorization by G5-03 fitted to the Michaelis-Menten Model (K m = 443.3 mg L-1, V max = 166.7 mg L-1 h-1). The decolorization of RR239 was monitored by UV-Vis and FTIR spectroscopy, which showed significant changes in peak positions when compared to the dye spectrum. Overall, the ability of S. xiamenensis G5-03 to decolorize textile azo dyes in a wide range of temperatures and pH (neutral-alkaline) indicate that this strain is a potential candidate for treating dye-containing effluent.