کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4415845 1307761 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sonochemical substrate selectivity and reaction pathway of systematically substituted azo compounds
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Sonochemical substrate selectivity and reaction pathway of systematically substituted azo compounds
چکیده انگلیسی

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 LC-MS a reaction pathway of the sonochemical degradation of the analysed azo compound is proposed indicating the formation of cyclohexadienone and naphthalene quinone derivatives.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 67, Issue 8, April 2007, Pages 1526–1532
نویسندگان
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