Biosorption potential of dried Neurospora crassa for Burazol Blue ED was studied with respect to pH, equilibrium time, biomass concentration and temperature to determine equilibrium and kinetic model parameters. The most suitable pH, equilibrium time and biomass concentration were determined as 1 +/- 0.2. 60 min and 1.6 g L-1, respectively, at 20 degrees C +/- 1.0. The equilibrium data was best described by the Langmuir isotherm model. The maximum biosorption capacity (q(m)) of biomass obtained from the Langmuir fit was 110.1 mg g(-1) biomass at 30 degrees C. The overall biosorption process was best described by the pseudo-second-order kinetic model. The biosorption process was found to be favored at higher temperatures. (C) 2009 Elsevier B.V. All rights reserved.