کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10566324 | 972314 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of sonochemical degradation of phenol using hydrogen atom scavengers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhancement of sonochemical degradation of phenol using hydrogen atom scavengers Enhancement of sonochemical degradation of phenol using hydrogen atom scavengers](/preview/png/10566324.png)
چکیده انگلیسی
Sonochemical degradation of phenol was found to be enhanced in the presence of the volatile hydrogen atom scavengers CCl4 and perfluorohexane. The non-volatile hydrogen atom scavenger iodate did not enhance phenol degradation. The first order rate constant for aqueous phenol degradation in separate experiments using different sonochemical probes increased in the presence of 150 μM CCl4 from 0.014 to 0.031 minâ1 (probe 1) and from 0.022 to 0.061 minâ1 (probe 2). In the presence of <1.5 μM C6H14, the first order rate constant increased from 0.014 to 0.032 minâ1 (probe 1). Hydroquinone was the major observed reaction intermediate both in the presence and absence of hydrogen atom scavengers. Hydroquinone yields were substantially higher in the presence of hydrogen atom scavengers, suggesting that hydroxyl radical pathways for phenol degradation were enhanced by the hydrogen atom scavengers. These additives may be useful in improving pollutant degradation efficiency or improving synthetic processes that rely on hydroxyl radical as a key intermediate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 12, Issue 4, March 2005, Pages 313-317
Journal: Ultrasonics Sonochemistry - Volume 12, Issue 4, March 2005, Pages 313-317
نویسندگان
Weixi Zheng, Michelle Maurin, Matthew A. Tarr,