152
M. Dexilin et al.
Fig. 8 Effect of initial dye
concentration on
decolorization of AV 90 by
Aspergillus flavus
Dye concentration (mg/L
-1 )
The growth of the fungi may be affected by the presence of dyes at toxic concentrations and in turn shows effect on decolorization efficiency. Also, the structure of
the dye is also influential in deciding the extent to which dye is decolorized. As
reported earlier (Kapdan et al. 2000) that at lower dyestuff concentration 0.05%
complete decolorization of everzol turquoise blue G by C. versicolor was observed
whereas only partial decolorization could be achieved for dyestuff concentrations
above 0.05%. Phanerochaete chrysosporium showed a color removal efficiency of
95–100% on direct blue 15 in repeated batches (Pazarlioglu et al. 2005) following
first order kinetics with respected to initial concentrations of dye.
5 Conclusion
In summary, the present study indicates that the fungal isolate Aspergillus flavus is an
excellent strain for the decolorization of azo dyes. The optimum pH and temperature
for enhanced decolorization is at 6 and 25 ºC, respectively. This implies the fungus
Aspergillus flavus serve as a potential candidate for the decolorization of textile
effluents containing the dyes. In future, further approach has to be focused on enzyme
responsible for decolorization of azo dyes.
References
Abadulla E, Tzanov T, Costa S, Robra K-H, Cavaco-Paulo A, Gübitz GM (2000) Decolorization
and detoxification of textile dyes with a laccase from Trametes hirsuta. Appl Environ Microbiol
66:3357–3362
Ali H (2010) Biodegradation of synthetic dyes—a review. Water Air Soil Pollut 213:251–273
Asgher M, Bhatti HN, Ashraf M, Legge RL (2008) Recent developments in biodegradation of
industrial pollutants by white rot fungi and their enzyme system. Biodegrad 19:771
Banat IM, Nigam P, Singh D, Marchant R (1996) Microbial decolorization of textile-dyecontaining
effluents: a review. Bioresour Technol 58(3):217–227
M. Dexilin et al.
Fig. 8 Effect of initial dye
concentration on
decolorization of AV 90 by
Aspergillus flavus
Dye concentration (mg/L
-1 )
The growth of the fungi may be affected by the presence of dyes at toxic concentrations and in turn shows effect on decolorization efficiency. Also, the structure of
the dye is also influential in deciding the extent to which dye is decolorized. As
reported earlier (Kapdan et al. 2000) that at lower dyestuff concentration 0.05%
complete decolorization of everzol turquoise blue G by C. versicolor was observed
whereas only partial decolorization could be achieved for dyestuff concentrations
above 0.05%. Phanerochaete chrysosporium showed a color removal efficiency of
95–100% on direct blue 15 in repeated batches (Pazarlioglu et al. 2005) following
first order kinetics with respected to initial concentrations of dye.
5 Conclusion
In summary, the present study indicates that the fungal isolate Aspergillus flavus is an
excellent strain for the decolorization of azo dyes. The optimum pH and temperature
for enhanced decolorization is at 6 and 25 ºC, respectively. This implies the fungus
Aspergillus flavus serve as a potential candidate for the decolorization of textile
effluents containing the dyes. In future, further approach has to be focused on enzyme
responsible for decolorization of azo dyes.
References
Abadulla E, Tzanov T, Costa S, Robra K-H, Cavaco-Paulo A, Gübitz GM (2000) Decolorization
and detoxification of textile dyes with a laccase from Trametes hirsuta. Appl Environ Microbiol
66:3357–3362
Ali H (2010) Biodegradation of synthetic dyes—a review. Water Air Soil Pollut 213:251–273
Asgher M, Bhatti HN, Ashraf M, Legge RL (2008) Recent developments in biodegradation of
industrial pollutants by white rot fungi and their enzyme system. Biodegrad 19:771
Banat IM, Nigam P, Singh D, Marchant R (1996) Microbial decolorization of textile-dyecontaining
effluents: a review. Bioresour Technol 58(3):217–227