Bioremediation of dyes in textile effluents by Aspergillus oryzae |
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Authors: | Corso Carlos Renato Maganha de Almeida Ana Carolina |
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Institution: | Department of Biochemistry and Microbiology, Biological Sciences Institute, S?o Paulo State University, UNESP-Av 24A, 1515, CEP 13.506-900, Rio Claro, S?o Paulo, Brazil. crcorso@rc.unesp.br |
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Abstract: | 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. |
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