Bioremoval of an azo textile dye, Reactive Red 198, by Aspergillus flavus

The objective of this paper was to study the potential for bioremoval of a textile dye, Reactive Red 198 (RR198), by a fungus isolated from soil collected from an effluent disposal area near a textile company. The fungus was identified as Aspergillus flavus, and its use as a low-cost live-cell biomass for the biodegradation of RR198 from contaminated water was investigated using batch studies. The effects of time, dye concentration, and pH as variable factors were examined in the process. Results showed that bioremoval of RR198 by A. flavus increased to over 84.96% with increasing time until equilibrium was reached after a period of 24 h. A low pH was the most effective, as were lower levels of dye concentration. The decolorization was determined by the decrease in the absorption maximums of this dye by UV–visible spectroscopy. A. flavus was shown to be an efficient fungus for removal of RR198 from wastewater.