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

• Published in: Revista ambiente & água Vol. 14; no. 6; pp. 1 - 11
• Main Authors: Cossolin, Aline Silva, 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
• Format: Journal Article
• Language: English
• Published: Taubaté Instituto de Pesquisas Ambientais em Bacias Hidrográficas 2019; Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
• Subjects: Analytical methods; Azo dyes; Bacteria; bacterium; Biodegradation; Decoloring; Decolorization; Dyes; ENGINEERING, ENVIRONMENTAL; Experiments; Fourier transforms; ftir; Infrared spectroscopy; kinetic study; Kinetics; Landfill; Landfills; Metabolites; Microbiological strains; pH effects; Reaction kinetics; reactive red 239; Sediment pollution; Shewanella xiamenensis; Soil; Soil contamination; Soil pollution; Soils; Spectrum analysis; Ultraviolet radiation; Waste disposal sites; Wastewater treatment; Brazil; bacterium; Reactive Red 239; FTIR; estudo cinético; biodegradation; kinetic study; bactéria; biodegradação
• ISSN: 1980-993X; 1980-993X
• DOI: 10.4136/ambi-agua.2446

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 (Km = 443.3 mg L-1, Vmax = 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.