کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7704073 | 1496881 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process
ترجمه فارسی عنوان
دفع زباله های فاضلاب دی متیل هیدرازین نامتقارن با فرآیند پیشرفته فنتون ناشی از حفرات هیدرودینامیکی
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کلمات کلیدی
دی متیل هیدرازین نامتقارن، حفره هیدرودینامیکی، فرآیند پیشرفته فنتون، فاضلاب،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
چکیده انگلیسی
A pilot scale hydrodynamic cavitation (HC) reactor, using iron metal blades, as the heterogeneous catalyst, with no external source of H2O2 was developed for catalytic decontamination of unsymmetrical dimethylhydrazine (UDMH) waste water. In situ generation of Fenton reagents suggested an induced advanced Fenton process (IAFP) to explain the enhancing effect of the used catalyst in the HC process. The effects of the applied catalyst, pH of the initial solution (1.0-9.7), initial UDMH concentration (2-15Â mg/l), inlet pressure (5.5-7.8Â bar), and downstream pressure (2-6Â bar), have been investigated. The results showed that the highest cavitation yield can be obtained at pH 3 and initial UDMH concentration of 10Â mg/l. Also, an increase in the inlet pressure would lead to an increase in the extent of UDMH degradation. In addition, the optimum value of 3Â bar was determined for the downstream pressure that resulted to 98.6% degradation of UDMH after 120Â min of processing time. Neither n-nitrosodimethylamine (NDMA) nor any other toxic byproduct (/end-product) was observed in the investigated samples. Formic acid and acetic acid, as well as nitromethane, were identified as oxidation by-products. The present work has conclusively established that hydrodynamic cavitation in combination with Fenton's chemistry can be effectively used for the degradation of UDMH.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 23, March 2015, Pages 257-265
Journal: Ultrasonics Sonochemistry - Volume 23, March 2015, Pages 257-265
نویسندگان
Mahmood Torabi Angaji, Reza Ghiaee,