Optimization of operational conditions for biodegradation of chlorophenols by laccase-polyacrilonitrile beads system (Articolo in rivista)

Type
Label
  • Optimization of operational conditions for biodegradation of chlorophenols by laccase-polyacrilonitrile beads system (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.molcatb.2012.01.021 (literal)
Alternative label
  • Menale C.; Nicolucci C.; Catapane M.; Rossi S.; Bencivenga U.; Mita D.G.; Diano, N. (2012)
    Optimization of operational conditions for biodegradation of chlorophenols by laccase-polyacrilonitrile beads system
    in Journal of molecular catalysis. B, Enzymatic (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Menale C.; Nicolucci C.; Catapane M.; Rossi S.; Bencivenga U.; Mita D.G.; Diano, N. (literal)
Pagina inizio
  • 38 (literal)
Pagina fine
  • 44 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 78 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR, Inst Genet & Biophys ABT, I-80131 Naples, Italy Univ Naples 2, Dept Expt Med, I-80138 Naples, Italy Natl Inst Biosyst & Biostruct INBB, I-00136 Rome, Italy (literal)
Titolo
  • Optimization of operational conditions for biodegradation of chlorophenols by laccase-polyacrilonitrile beads system (literal)
Abstract
  • The oxidative biodegradation of 2- and 4-chlorophenol (CPs) catalyzed by immobilized laccase from Trametes versicolor was conducted in a bed reactor. The effects of reaction conditions (reaction time, dosage of immobilized enzyme, flow rate, pH value and temperature, initial concentration) on CPs removal efficiency (RE) were investigated. By using in the immobilization solution an enzyme dosage of 2.5 mg(free) (enz)g(carrier)(-1), the maximum ratio of laccase to PAN-beads is resulted 0.25 mg(immenz)g(carrier)(-1). RE values greater than 70% were obtained when 40 mL of 1 mM substrate solution were circulated for 90min at 75 mL min(-1) in the bed reactor filled with 12 g of laccase-PAN beads. The optimal pH for CPs biodegradation was 5 and it was not related to substituent position on aromatic ring. Experiments with immobilized laccase demonstrated good removal at high initial substrate concentrations and high thermal stability. The affinity of 2-CP was higher than that of 4-CP. (literal)
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