Immobilization of laccase on hairy polymer grafted zeolite particles: Degradation of a model dye and product analysis with MALDI-ToF-MS

ÇELİKBIÇAK Ö., BAYRAMOĞLU G., Yilmaz M., Ersoy G., Bicak N., SALİH B., ...More

MICROPOROUS AND MESOPOROUS MATERIALS, vol.199, pp.57-65, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 199
  • Publication Date: 2014
  • Doi Number: 10.1016/j.micromeso.2014.08.003
  • Journal Name: MICROPOROUS AND MESOPOROUS MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.57-65
  • Keywords: Zeolite, Composite material, Laccase, Dye degradation, MALDI-ToF-MS, MAGNETIC BEADS, CATALYTIC EFFICIENCY, TRAMETES-VERSICOLOR, PHENOLIC-COMPOUNDS, AQUEOUS-SOLUTIONS, SILICA PARTICLES, AZO DYES, REMOVAL, DECOLORIZATION, MEMBRANE
  • Gazi University Affiliated: Yes

Abstract

Poly(2-chloroethyl acrylate), p(CEA), as a functional polymer was grafted via surface initiated atom transfer radical polymerization (SI-ATRP) on zeolite particles. The p(CEA) grafted zeolite particles were aminated, and a ligninolytic enzyme "laccase" from Trametes versicolor was covalently immobilized on the composite particles via glutaraldehyde coupling. The amount of immobilized laccase on the zeolite-g-p(CEA) particles was determined as 17.7 mg g(-1) particles. The degradation of a model dye (i.e., Reactive Red 120; RR-120) with the free and immobilized laccases was evaluated in batch and continuous systems. The covalently immobilized laccase showed a high decolorization efficiency toward RR-120 in aqueous solution compared to the free counterpart. The resulting dye degradation products were analyzed by matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI ToF-MS). (C) 2014 Elsevier Inc. All rights reserved.