Characterization of Dye Decolorization in Cell-Free Culture Broth ofTrametes versicolorCBR43.
The dye decolorization rate in a cell-free culture broth of the white-rot fungusTrametes versicolorCBR43 was studied, including the effects of inhibitors of NaCl, Zn(II), and Cd(II) on dye decolorization activity. The maximum rates of dye decolorization in cell-free culture broth were 1,410, 44.7, 41.2, and 0.19 μmol·l-1·min-1for Acid Blue 62, Acid Black 175, Reactive Blue 4, and Acid Red 114, respectively. The inhibition effects of NaCl, Zn(II), and Cd(II) on dye decolorization were quantitatively compared using the half maximal inhibition concentration (IC50), which indicates the concentration of an inhibitor required for 50% inhibition. Based on IC50values, dye decolorization in the cell-free culture broth of CBR43 was most potently inhibited by Cd(II), whereas the inhibitory effect of NaCl was relatively low. The dye decolorization rates and IC50data can be used in the design and development of a dyewastewater treatment process usingT. versicolorCBR43 and its operating factors.
College of Medicine, Korea University, Seoul 02841, Republic of Korea.
Hyun
H
Ryu
Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea.
Hee Wook
HW
Ryu
Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.
Kyung Suk
KS
Cho
Cell-free culture broth; Trametes vesicolor; decolorization; inhibitor; kinetic analysis