Treatment of Nonylphenol with Laccase in a Rotating Reactor(ENVIRONMENTAL BIOTECHNOLOGY)
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概要
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The effects of operation conditions on reaction rate in the enzymatic oxidative treatment of nonylphenol with laccase in a rotating reactor were studied. Sea sand that adsorbed nonylphenol was used as a polluted soil model. Nonylphenol concentration decreased with laccase treatment five times faster at 40℃ than at 10℃ and the apparent activation energy of the enzyme reaction was 39 kJ mol^<-1>, which was in the range of the values reported for similar laccase reactions. Reaction rate increased when the angle of the axis of the rotating reactor from the vertical line increased and when the speed of revolution was increased to 10 rpm at different volumes of the enzyme solution. Thus, mixing is important for the oxidation of nonylphenol with laccase. The nonylphenol released from the sand into the enzyme solution in the initial stage of the treatment was easily oxidized. However, the nonylphenol adsorbed on the sand reacted slowly. Reaction rate increased nearly proportional to the square root of enzyme concentration, which suggests that the nonylphenol radical reacted with unoxidized nonylphenol (nonenzymatic propagation) during the enzymatic oxidative treatment. The dependence of reaction rate on the nonylphenol concentration was similar to the Michaelis-Menten type. The residual estrogenic activity of the treated sand was measured by medaka vitellogenin assay. The estrogenic activity decreased to 1/6-1/90 after 24 h of the treatment.
- 社団法人日本生物工学会の論文
- 2003-12-25
著者
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Tano Tatsuo
Department Of Bioresources Chemistry Faculty Of Agriculture Okayama University
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田中 孝明
新潟大・工・機能材料
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Fujii T
Niigata Univ. Pharmacy And Applied Life Sci. Niitsu Jpn
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Taniguchi Masayuki
Department of Materials Science and Technology, Niigata University
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Tanaka Takaaki
Department of Materials Science and Technology, Niigata University
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Fujii Tomoyuki
Department Of Food Science And Technology Niigata University Of Pharmacy And Applied Life Sciences
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Taniguchi M
Fac. Engineering Niigata Jpn
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Taniguchi M
Department Of Material Science And Technology Faculty Of Engineering
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Taniguchi M
Department Of Materials Science And Technology Niigata University
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Taniguchi Masayuki
Department Of Food Science And Technology Faculty Of Agriculture Kyoto University
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Taiyouji Mayumi
Gaduate School Of Science And Technology Niigata University:food Research Center Niigata Agricultura
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NOSE MASATAKA
Department of Materials Science and Technology, Niigata University
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ENDO AYUKO
Department of Materials Science and Technology, Niigata University
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Taniguchi Masayuki
Department Of Materials Science And Technology Niigata University
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Taniguchi Masayuki
Gaduate School Of Science And Technology Niigata University:food Research Center Niigata Agricultura
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Fujii Tomoyuki
Department Of Applied Biological Chemistry The University Of Tokyo
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Endo Ayuko
Department Of Materials Science And Technology Niigata University
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Fujii Takao
Department Of Food Science And Technology Niigata University Of Pharmacy And Applied Life Sciences
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Nose Masataka
Department Of Materials Science And Technology Niigata University
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Tanaka Mitsuo
Department Of Food Science And Technology Faculty Of Agriculture Kyoto University
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Taniguchi Masayuki
Department Of Cardiology Jikei University School Of Medicine Daisan Hospital
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Tanaka Takaaki
Department Of Geoscience Joetsu University Of Education
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Tanaka Takaaki
Department Of Biotechnology Faculty Of Engineering Okayama University
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Taniguchi Masayuki
Department Of Physics Faculty Of Science Kobe University
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Tanaka Takaaki
Department Of Bioscience & Biotechnology Faculty Of Engineering Okayama University
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Takahashi Masafumi
Department of Materials Science and Technology, Niigata University
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