title: Bioremediation of dyes in textile effluents by Aspergillus oryzae.
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 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.
authors.affiliation: 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
authors.forename: Carlos Renato
authors.initials: CR
authors.lastname: Corso
authors.forename: Ana Carolina
authors.initials: AC
authors.lastname: Maganha de Almeida
mesh_terms: 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*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D003470:Culture Media; D007220:Industrial Waste