کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5144444 1496865 2018 28 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of in-situ nitrite ion formation on the sonochemical transformation of para-aminosalicylic acid
ترجمه فارسی عنوان
نقش تشکیل یون های نیتریت در محل بر تحول سونوسی شیمی پارام آمینوسالسیلیک اسید
کلمات کلیدی
فرایندهای اکسیداسیون پیشرفته، سونولیز، رادیکال هیدروکسیل، رادیکال نیترو، تجزیه و تحلیل محصولات، مکانیزم تخریب،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی
The sonochemical transformation of para-aminosalicylic acid (PAS), a widely used antibiotic and an identified Emerging Pollutant (EP) under the class of Pharmaceuticals and Personal Care Products (PPCPs), have been investigated in aqueous medium. Ultrasound having frequency of 350 kHz and power of 80 W was utilized for the degradation of PAS. A complete degradation (100%) of PAS after 60 min and about 83% of COD removal after 120 min of sonication, were obtained. Fourteen intermediate products were identified using LC-Q-TOF-MS. On a comparison with UV/H2O2 method, it is understood that four products out of fourteen were nitro derivatives which are formed only in the sonolysis, and the rest are from hydroxyl radicals. The involvement of nitrite which is formed from the sonolysis of solution containing PAS, in the formation of the other four nitro products has been established from the control studies. Nitrite ion partially scavenge hydroxyl radical in the course of the reaction to form nitrite radical which is the reactive species for the production of nitro compounds. It is, therefore, proposed that in addition to hydroxyl radical, contribution of in-situ generated nitrite also plays an important role in the sonochemical transformation of PAS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 40, Part A, January 2018, Pages 213-220
نویسندگان
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