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|Title:||Biosorption of rhodamine B using a low-cost biosorbent prepared from inactivated Aspergillus oryzae cells: kinetic, equilibrium and thermodynamic studies|
|Author:||Souza, Flávia H. M.|
Leme, Vitória F. C.
Costa, Giovanna O. B.
Castro, Karine C.
Giraldi, Tania R.
Andrade, Grazielle S. S.
|Abstract:||This study aimed to investigate the kinetics, isotherms, and thermodynamics of biosorption of the cationic dye rhodamine B by a low-cost biosorbent prepared from Aspergillus oryzae cells. Culture medium composition (mineral salts, nitrogen source, and carbon source) influenced removal efficiency, and dye removal increased with increasing biosorbent concentrations until a plateau was reached at 10 g L−1. Temperature and dye concentration were directly related to removal, and the highest removal efficiency was obtained at 40 °C and 200 mg L−1 of dye. The adsorption kinetics was best fitted to a pseudo-second-order model, and equilibrium data were well described by the Freundlich equation. Thermodynamic analysis indicated that the biosorption of rhodamine B by A. oryzae cells is physical in nature, spontaneous, and more favorable at higher temperatures and dye concentrations. Overall, the results suggest that inactivated A. oryzae biomass is a promising biosorbent for the removal of cationic dyes from wastewater|
|Appears in Collections:||FEQ - Artigos e Outros Documentos|
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