Bioremediation of Dyes in Textile Effluents by "Aspergillus oryzae"
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[1] Universidade Estadual Paulista "Júlio de Mesquita Filho", Brasil
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- Localización: Microbial ecology, ISSN-e 1432-184X, ISSN 0095-3628, Vol. 57, Nº. 2, 2009, págs. 384-390
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
In this study Aspergillus oryzae was utilized to remove azo dyes from aqueous solution. Physically induced in its paramorphogenic form to produce standardized mycelial pellets, the non-autoclaved and autoclaved hyphae biomass was applied to biosorb the reactive dyes Procion Red HE7B (PR-HE7B) and Procion Violet H3R (PV-H3R) at different pH values (2.50, 4.50, and 6.50). The best pH for biosorption was 2.50, though the autoclaved demonstrated a higher biosorption capacity than the non-autoclaved pellets. The toxicity level was determined using the Trimmed Spearman–Karber method with Daphnia similis in all bioassays. The calculated toxicity of PV-H3R (LC100 62.50 μg mL−1) was higher than to PR-HE7B (LC100 300.00 μg mL−1), and its results brought out that the decrease of toxicity levels to zero might be accomplished by adding small quantities of pelletized A. oryzae to the solutions.
