BOKU - Universität für Bodenkultur Wien - Forschungsinformationssystem
Gewählte Publikation:
Rehorek, A; Hoffmann, P; Kandelbauer, A; Gübitz, GM.
(2007):
Sonochemical substrate selectivity and reaction pathway of systematically substituted azo compounds.
Chemosphere. 2007; 67(8):1526-1532
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- Abstract:
- The sonochemical degradation of the systematically substituted azo compound 2,7-dihydroxy-1-phenylazonaphthaline-3,6-disulfonic acid was investigated using a frequency of 850 kHz and an acoustic input power of 61 W. All derivatives were degraded completely within 6 h by the ultrasonic treatment. Trifluoromethyl substituted azo compounds exhibited 2-3-fold higher degradation rates in comparison to the reference hydrogen substituted azo compound (k = 0.54 h(-1)). In contrast to enzymatic processes (azoreductase or laccase), the ultrasonic treatment for these ortho-, meta-, and para-substituted azo compound showed 1.5-50-fold higher degradation rates. Additionally the ultrasound treatment was characterized by shorter reaction times. As a result of the detection and identification of specific intermediates using LGMS a reaction pathway of the sonochemical degradation of the analysed azo compound is proposed indicating the formation of cyclohexadienone and naphthalene quinone derivatives. (c) 2006 Elsevier Ltd. All rights reserved.
- Autor*innen der BOKU Wien:
- Gübitz Georg
- BOKU Gendermonitor:
- Find related publications in this database (using NML MeSH Indexing)
- Azo Compounds - chemistry
- Industrial Waste - analysis
- Naphthalenesulfonates - chemistry
- Sonication -
- Ultrasonics -
- Find related publications in this database (Keywords)
- ultrasound
- azo compound
- substrate selectivity
- reaction pathway
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