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Horseradish peroxidase immobilized on aluminum-pillared interlayered clay for the catalytic oxidation of phenolic wastewater

Cheng, Jun, Ming Yu, Shao, Zuo, Peng·2006·Water Research
DOI 10.1016/j.watres.2005.11.017
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Abstract

Horseradish peroxidase (HRP) was successfully immobilized on aluminum-pillared inter-layered clay (Al-PILC) to obtain enzyme-clay complex for the treatment of wastewater polluted with phenolic compounds. The immobilized HRP exerted a perfect phenol removal by precipitation or transforming to other products over a broader pH range from 4.5 to 9.3. The addition of polyethylene glycol (PEG) could significantly enhance the phenol removal efficiency, and reduce the amount of immobilized enzyme required to achieve a high removal efficiency of over 90%. When the mass ratio of PEG/phenol and the molar ratio of hydrogen peroxide/phenol were 0.4 and 1.5, respectively, the oxidation of phenol could be completed within short retention time after the initiation of reaction in the absence of buffer. HRP immobilized on Al-PILC had better storage stability compared with free enzyme. However, the re-usability of the immobilized enzyme was not very satisfactory. In the fourth repeated test, the immobilized enzyme lost its catalytic performance. Further research should focus on the improvement of re-usability.

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Research works printed but not linked: 26

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Metadata

Authors
Cheng, J., Ming Yu, S., & Zuo, P.
Venue
Water Research
Publisher
Elsevier BV
Published
2006-01
Volume
40
Issue
2
Pages
283-290
ISSN
0043-1354
DOI
10.1016/j.watres.2005.11.017
Cited by
170
References
0
Language
en
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)

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