NDLI: Biodegradation of bisphenols with immobilized laccase or tyrosinase on polyacrylonitrile beads

Content Provider	Springer Nature Link
Author	Nicolucci, Carla Rossi, Sergio Menale, Ciro Godjevargova, Tzonka Ivav, Yavor Bianco, Mariangela Mita, Luigi Bencivenga, Umberto Mita, Damia G. Dia, Nadia
Copyright Year	2010
Abstract	The biodegradation of waters polluted by some bisphenols, endowed with endocrine activity, has been studied by means of laccase or tyrosinase immobilized on polyacrylonitrile (PAN) beads. Bisphenol A (BPA), Bisphenol B (BPB), Bisphenol F (BPF) and Tetrachlorobisphenol A (TCBPA) have been used. The laccase-PAN beads system has been characterized as a function of pH, temperature and substrate concentration. The biochemical parameters so obtained have been compared with those of the free enzyme to evidence the modification induced by the immobilization process. Once characterized, the laccase-PAN beads have been employed in a fluidized bed reactor to determine for each of the four bisphenols the degradation rate constant (k); the τ50, i.e., the time to obtain the 50% of degradation, and the removal efficiency (RE90) after 90 min of enzyme treatment. The same parameters have been measured for each of the four pollutants with the same fluidized bed bioreactor loaded with tyrosinase-PAN beads. The internal comparison, i.e., in each of the two catalytic systems, has shown that both enzymes exhibit a removal efficiency in the following order BPF>BPA>BPB>TCBPA. The external comparison, i.e., the comparison between the two catalytic system, has shown that the catalytic power of laccase were higher than that of tyrosinase. The operational stability of both catalytic systems resulted excellent, since they maintained more than 80% of the initial activity after 30 days of work.
Starting Page	673
Ending Page	683
Page Count	11
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	22
Issue Number	3
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biodegradation Bisphenols Laccase Tyrosinase PAN beads Geochemistry Terrestrial Pollution Microbiology Waste Management/Waste Technology Soil Science & Conservation Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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