Removal of phenols with encapsulated horseradish peroxidase in calcium alginate

Iran Alemzadeh, Siamak Nejati

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Horseradish peroxidase was encapsulated in calcium alginate for the purpose of phenol removal. Considering enzyme encapsulation efficiency, retention activity and enzyme leakage of the capsules, the best gelation condition was found to be 1 % w/v of sodium alginate solution and 5.5 % w/v of calcium chloride hexahydrate. Upon immobilization, pH profile of enzyme activity changes as it shows higher value at basic and acidic solution. Besides, for each phenol concentration there would be an enzyme concentration which going further than this value has no significant effect on phenol removal. Investigation into time course of phenol removal for both encapsulated and free enzyme showed that encapsulated enzyme had nearly similar efficiency in comparison with the same concentration of free enzyme; however the capsules were reusable up to four cycles without any changes in their efficiency. The ratio of hydrogen peroxide/phenol at which highest phenol removal obtained, found to be dependent on initial phenol concentration and in the solution of 2 and 8 mM phenol it were 1.15 and 0.94 respectively.

Original languageEnglish (US)
Pages (from-to)43-49
Number of pages7
JournalIranian Journal of Chemistry and Chemical Engineering
Volume28
Issue number2
StatePublished - Jun 1 2009

Fingerprint

Phenols
Alginate
Horseradish Peroxidase
Phenol
Calcium
Enzymes
Capsules
Sodium alginate
Calcium Chloride
Calcium chloride
alginic acid
Enzyme activity
Gelation
Encapsulation
Hydrogen peroxide
Hydrogen Peroxide
Catalyst activity

Keywords

  • Alginate
  • Encapsulation
  • Gelation
  • Horseradish Peroxidase
  • Phenol removal

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Removal of phenols with encapsulated horseradish peroxidase in calcium alginate. / Alemzadeh, Iran; Nejati, Siamak.

In: Iranian Journal of Chemistry and Chemical Engineering, Vol. 28, No. 2, 01.06.2009, p. 43-49.

Research output: Contribution to journalArticle

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