Journal
WATER AIR AND SOIL POLLUTION
Volume 202, Issue 1-4, Pages 179-188Publisher
SPRINGER
DOI: 10.1007/s11270-008-9968-5
Keywords
Dye decolorization; Pycnoporus sanguineus; Kinetics; Energetics; Fungal pellets
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Trypan Blue, an azo dye, was decolorized using the self-immobilizing fungal biomass of Pycnoporus sanguineus. The extent and the rate of dye decolorization were directly proportional to the initial dye concentration (20-60 mg L(-1)) and the reaction temperature (25-45A degrees C). Mass transfer within and outside the pellets did not limit dye degradation. The apparent kinetics of the decolorization reaction followed a first-order behavior. Activation energy for the biological decolorization was calculated at 23 kJ mol(-1). The decolorization process was endothermic with the enthalpy and entropy values calculated at 45.6 kJ mol(-1) and 146 J mol(-1) K(-1), respectively. Based on the value of Gibbs free energy change, the decolorization reaction under the conditions studied was non-spontaneous below 39A degrees C but was spontaneous at higher temperatures.
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