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Cyclodextrin-linked alginate beads as supporting materials for Sphingomonas cloacae, a nonylphenol degrading bacteria

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Title: Cyclodextrin-linked alginate beads as supporting materials for Sphingomonas cloacae, a nonylphenol degrading bacteria
Authors: Pluemsab, Weeranuch Browse this author
Fukazawa, Yasuaki Browse this author
Furuike, Tetsuya Browse this author
Nodasaka, Yoshinobu Browse this author
Sakairi, Nobuo Browse this author →KAKEN DB
Keywords: Cyclodextrin
Alginate bead
Nonylphenol
Inclusion complex
Sphingomonas cloacae
Issue Date: Aug-2007
Publisher: Elsevier Ltd.
Journal Title: Bioresource Technology
Volume: 98
Issue: 11
Start Page: 2076
End Page: 2081
Publisher DOI: 10.1016/j.biortech.2006.08.009
PMID: 17055261
Abstract: Calcium alginate beads covalently linked with α-cyclodextrin (α-CD-alginate beads) were prepared and examined for their ability to serve as a supporting matrix for bacterial degradation of nonylphenol, an endocrine disruptor. Column chromatographic experiment using α-CD-alginate beads with diameter of 657 ± 82 μm and with degree of CD substitution of 0.16 showed a strong affinity for nonylphenol adsorption. Although addition of α-CD (2.7-27 mM) to the culture broth of Sphingomonas cloacae retarded nonylphenol degradation, the immobilized bacteria on the CD-alginate beads were effective for the degradation. Batch degradation tests using the immobilized bacteria on α-CD-alginate-beads showed 46% nonylphenol recovery after 10-day incubation at 25 ± 2℃, and the recovery reached to about 17% when wide and shallow incubation tubes were used to facilitate uptake of the viscous liquid of nonylphenol on the surface of the medium. Scanning electron microscopic photographs revealed that multiplicated bacteria was present both on the surface and inside the beads and the matrix of CD-alginate was stable and suitable during 10-day incubation.
Type: article (author version)
URI: http://hdl.handle.net/2115/39540
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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