Resumo

BARREDA-REYES, Karen Lizbeth et al. Acid orange 10 dye biosorption by yeast isolated from polluted soil biomass. Rev Cub Quim [online]. 2015, vol.27, n.3, pp. 216-227. ISSN 2224-5421.

The aim of this paper was to evaluate the ability of biosorption azo dye acid orange 10 of the biomass of a yeast isolated from soil contaminated with wastewater from the textile industry. In equilibrium studies was used 1,0 g L^-1 of biomass, at 20 °C and pH 2,0 at initial concentrations between 10 mg L^-1 and 500 mg L^-1. The biosorption isotherm was fitted by Langmuir model resulting in a value of 87,40 mg g^-1 for saturated monolayer. To estimate the kinetic parameters, was considered an initial concentration of 100 mg L^-1 at 10 °C, 20 °C, 30 °C to 40 °C, biosorption kinetics were well described by the kinetic model of pseudo-first order. Studies of diffuse reflectance infrared spectroscopy showed that the amide groups were mainly responsible for the biosorption.

Palavras-chave : biosorption; azo dyes; wastewaters; acid orange 10.

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