Biodegradation of Direct Blue 15 by Free and Immobilized Trametes versicolor
Makaleler > Tam Makale · 2010
Yazarlar: Nurdan Kasikara Pazarlioglu, Alper AKKAYA, Hatice Ardag Akdogan, Burcin Gungor
Water Environment Research, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2010, cilt 82, ss 579-585
DOI: 10.2175/106143009x12529484815999
Özet
To investigate biodegradability by Trametes versicolor, five structurally different direct azo-dyes--Direct Black 38, Direct Blue 15 (DB 15), Direct Orange 26, Direct Green 6, and Direct Yellow 12--were studied. The DB 15 was determined as the best biodegradable dye by this white-rot fungus. Laccase and manganese peroxidase activities were monitored with the biodegradation process; it was observed that laccase played an important role in the dye degradation, while manganese peroxidase activity could not be detected. Possible degradation products also were examined by gas chromatography-mass spectrometry, but no metabolite was detected after the degradation and/or decolorization process. To enhance performance of the fungi during the degradation, Trametes versicolor cells were immobilized in alginate beads. Then, DB 15 decolorization by immobilized Trametes versicolor was studied in a small-scale packed-bed reactor. The color removal efficiency in repeated batches was found to be 98 and 93% for 50 mg/L DB 15.