Bioremediation of dyes in textile effluents by Aspergillus oryzae.
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 microg mL(-1)) was higher than to PR-HE7B (LC100 300.00 microg 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.
Corso
Carlos Renato
CR
Department of Biochemistry and Microbiology, Biological Sciences Institute, São Paulo State University, UNESP-Av 24A, 1515, CEP 13.506-900, Rio Claro, São Paulo, Brazil. crcorso@rc.unesp.br
Maganha de Almeida
Ana Carolina
AC
D000327:Adsorption; D000818:Animals; D001236:Aspergillus oryzae / Q000378:metabolism*; D001391:Azo Compounds / Q000378:metabolism* / Q000493:pharmacokinetics / Q000633:toxicity; D001673:Biodegradation, Environmental; D004396:Coloring Agents / Q000378:metabolism* / Q000493:pharmacokinetics / Q000633:toxicity; D003470:Culture Media; D003621:Daphnia / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D013783:Textile Industry; D018675:Toxicity Tests; D014865:Waste Disposal, Fluid / Q000379:methods*
D001391:Azo Compounds; D004396:Coloring Agents; D003470:Culture Media; D007220:Industrial Waste