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Acid Orange 7 was heterophotolyzed using titanium dioxide, oxygen bubbling, back-flow tubular reactor, polychromatic radiation of high pressure Hg lamp and aqueous sodium bicarbonate, sodium hydroxide or sulfuric acid as solvents. Dependences of reaction rates on Acid Orange 7 concentrations have exhibited either straight-line (for lower initial concentrations) or a convex shape (for higher initial concentrations). Variations in shapes of kinetic curves observed were explained by the effect of decrease in both (i)...

Direct Red 80 is a commercially produced azo dye commonly used in textile industry. It belongs to a significant group of textile dyes with high chemical stability and resistance to biodegradation. Microscopic fibrous fungi of the genus Aspergillus, as they were isolated from the sludge lagoon (a place significantly polluted by industrial organics), were utilized for biodegradation of the dye. Experiments on static cultivation took place for 10 and/or 20 days, and the results obtained showed the ability of all appl...