کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
640536 1456976 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Activated carbon fiber as heterogeneous catalyst of peroxymonosulfate activation for efficient degradation of Acid Orange 7 in aqueous solution
ترجمه فارسی عنوان
الیاف کربن فعال به عنوان کاتالیزور ناهمگن از فعال سازی پراکسیمنسوفسفات برای تخریب کارآمد اسید اورنج 7 در محلول آبی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی
Increasing attention has been paid to environmental friendly activation method of peroxymonosulfate (PMS) in the field of advanced oxidation processes (AOPs). In this work, activated carbon fiber (ACF) was utilized as an effective and green catalyst to activate peroxymonosulfate (PMS) for degradation of aqueous organic pollutant. As results indicated, a very low dosage of ACF (0.3 g L−1) could efficiently activate PMS to eliminate Acid Orange 7 (AO7), a probe compound, and the degradation of AO7 followed first order kinetics. Surface chemistry analyses of ACF samples, including BET specific surface area, pH at the point of zero charge, Boehm titration and FTIR spectroscopy, suggested that the basic sites on ACF surface were likely to be the active sites inducing the decomposition of PMS and the generation of radicals. Quenching studies confirmed that sulfate radicals (SO4−) and hydroxyl radicals (HO), which formed on the surface of ACF, were the primary oxidizing species. A possible pathway for AO7 degradation was proposed by monitoring the temporal evolution of intermediates in the solution, with the use of GC-MS and ionic chromatography (IC). It is suggested that the degradation process of AO7 was initiated by cleavage of azo linkage and further undergoes ring-opening reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 143, 25 March 2015, Pages 19-26
نویسندگان
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