Abstract
The effect of different metal ions and two redox mediators on laccase activity and laccase-catalyzed decolorization of five synthetic dyes was investigated in vitro using crude laccase from a novel white rot fungus Peniophora sp. (NFCCI-2131). The fungus effectively decolorized crystal violet and brilliant green on malt extract agar medium. Laccase activity was enhanced by metal ions such as Cd2+, Mn2+, Ni2+, Co2+, Na+ Ca2+, and Cu2+. Among the different dyes tested, highest decolorization of crystal violet (96.30 %) was obtained in the presence of 1 mM ABTS followed by 86.01 % by HBT. The results conspicuously indicated that laccase from Peniophora sp. has the potential for color removal from textile dye effluent even in the presence of toxic metal ions.
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Abbreviations
- MEA:
-
Malt extract agar
- ABTS:
-
2,2’-Azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)
- HBT:
-
1-Hydroxybenzotriazole
- NFCCI:
-
National Fungal Culture Collection of India
- ARI:
-
Agharkar Research Institute
- ppm:
-
Parts per million
- mM:
-
Millimolar
- mm d−1 :
-
Millimeter per day
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Acknowledgment
The authors wish to thank the Council of Science and Technology, U.P., for a research grant to Shikha and the University Grants Commission, New Delhi for Rajiv Gandhi National fellowship to Shiv Shankar.
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Shankar, S., Nill, S. Effect of Metal Ions and Redox Mediators on Decolorization of Synthetic Dyes by Crude Laccase from a Novel White rot Fungus Peniophora sp. (NFCCI-2131). Appl Biochem Biotechnol 175, 635–647 (2015). https://doi.org/10.1007/s12010-014-1279-2
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DOI: https://doi.org/10.1007/s12010-014-1279-2