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Immobilization of horseradish peroxidase in phospholipid-templated titania and its applications in phenolic compounds and dye removal

Authors
Journal
Enzyme and Microbial Technology
0141-0229
Publisher
Elsevier
Publication Date
Volume
55
Identifiers
DOI: 10.1016/j.enzmictec.2013.11.005
Keywords
  • Horseradish Peroxidase
  • Phospholipid-Templated Titania
  • Enzyme Encapsulation
  • Phenolic Compound
  • Dye

Abstract

Abstract In this study, horseradish peroxidase (HRP) was encapsulated in phospholipid-templated titania particles through the biomimetic titanification process and used for the treatment of wastewater polluted with phenolic compounds and dye. The encapsulated HRP exhibited improved thermal stability, a wide range of pH stability and high tolerance against inactivating agents. It was observed an increase in Km value for the encapsulated HRP (8.21mM) when compared with its free counterpart. For practical applications in the removal of phenolic compounds and dye by the encapsulated HRP, the removal efficiency for phenol, 2-chlorophenol, Direct Black-38 were 92.99%, 87.97%, and 79.72%, respectively, in the first treatment cycle. Additionally, the encapsulated HRP showed better removal efficiency than free HRP and a moderately good capability of reutilization.

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