Degradation of N-Oxyl Radical Compounds by Fenton Reaction
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- Tanaka Chiaki
- Gunze Limited
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- Yui Yoshinari
- Gunze Limited
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- Isogai Akira
- Graduate School of Agriculture and Life Science, The University of Tokyo
Bibliographic Information
- Other Title
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- フェントン試薬によるN-オキシル化合物の分解
Abstract
<p>2,2,6,6-Tetramethylpiperidine-1-oxyl radical (TEMPO) and their derivatives, 4-acetamide-TEMPO and 4-hydroxy-TEMPO, were dissolved in water, and their degradation behavior by Fenton reaction was studied under various conditions, considering the treatment of the N-oxyl radical-containing washing effluents formed during TEMPO-mediated oxidation of various celluloses. The N-oxyl radicals were treated with FeSO4 and H2O2 in water at pH 2.7 and 35 ̊C for various times, and time-dependent concentrations of the N-oxyl radicals were determined by electron spin resonance. When 0.29 mmol FeSO4 and 0.34 mmol H2O2 were used to the 100 mL solution containing 0.01 g N-oxyl radical (i.e., ~100 ppm), its concentration became below the detection limit (< 0.01 ppm) after Fenton reaction for 90 min. When 5% (v/v) ethanol, dimethylsulfoxide or acetone was present in the TEMPO-containing solution, similar degradation behavior by Fenton reaction was observed. The degradation products of TEMPO present in the supernatant and solid fractions formed during Fenton reaction were analyzed by gas-chromatography-mass spectroscopy, solid- and liquid-state 13C-NMR, ion chromatography and others. The results indicate that the N-oxyl radical compounds were mostly degraded to CO2, water and nitrate/nitrite ions by Fenton reaction. Thus, Fenton reaction is available for the treatment of washing effluents formed during TEMPO-mediated oxidation of celluloses.</p>
Journal
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- Journal of Fiber Science and Technology
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Journal of Fiber Science and Technology 73 (2), 42-48, 2017
The Society of Fiber Science and Technology, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001205764199040
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- NII Article ID
- 130005331504
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- ISSN
- 21897654
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed