Polyacrylamide-based semi-interpenetrating networks for entrapment of laccase and their use in azo dye decolorization


Koklukaya S. Z. , Sezer S., AKSOY S., Hasirci N.

BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY, vol.63, no.5, pp.699-707, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 63 Issue: 5
  • Publication Date: 2016
  • Doi Number: 10.1002/bab.1417
  • Journal Name: BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.699-707
  • Keywords: Acid Orange 52, decolorization, immobilized enzyme, laccase, semi-IPNs, IMMOBILIZED LACCASE, GLUCOSE-ISOMERASE, POLYMER NETWORKS, BIOLOGICAL TREATMENT, REACTIVE BLACK-5, TRAMETES-HIRSUTA, SYNTHETIC DYES, SILICA BEADS, WATER, CHITOSAN
  • Middle East Technical University Affiliated: Yes

Abstract

In this study, laccase from Trametes versicolor was immobilized in poly(acrylamide-crotonic acid)/sodium alginate [P(AAm-CrA)/alginate], poly(acrylamide-crotonic acid)/K-carrageenan [(P(AAm-CrA)/K-car)], poly(acrylamide-citraconic acid)/sodium alginate (P(AAm-CA)/alginate), and poly(acrylamide-citraconic acid)/K-carrageenan (P(AAm-CA)/K-car) semi-interpenetrating network by entrapment method. Optimum pH and temperatures values were determined between 5.0-6.0 and 40-50 degrees C for free laccase (FL) and immobilized laccases, respectively. After 42 days of storage at 4 degrees C, FL and immobilized laccases retained their original activities in the range of 55%-73%. Percent decolorization of Acid Orange 52 by free enyzme and enyzmes immobilized in hydrogels was found between 63% and 39%. Percent decolorization of Acid Orange 52 in the presence of mediator by free enyzme was found 73% and enyzmes immobilized in hydrogels were found as 73%. (C) 2015 International Union of Biochemistry and Molecular Biology, Inc.