کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6577921 | 1422924 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced superoxide radical production for ofloxacin removal via persulfate activation with Cu-Fe oxide
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Cu-Fe composite oxides with different Cu:Fe ratios were synthesized by a hydrothermal method and investigated as a heterogeneous catalyst for persulfate activation. The obtained samples exhibited much higher activity than CuFe2O4 for the degradation and mineralization of ofloxacin with persulfate, and the optimized Cu:Fe ratio was 1:1 (CuFe1). The results of catalyst characterization and electron paramagnetic resonance analysis indicate that the activities of the catalysts for ofloxacin degradation and superoxide radical (O2â) production are highly positively correlated with their redox ability. The removal efficiencies of ofloxacin in the presence of different scavengers further demonstrate that O2â is the dominant reactive species in this process, which is quite different from previous studies. It is suggested that CuFe1 with higher oxidation ability could weaken the SO bond of adsorbed persulfate, thus promoting the decomposition persulfate into O2â. Finally, the possible degradation pathway of ofloxacin was proposed according to the liquid chromatographyâmass spectrometry result.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 354, 15 December 2018, Pages 473-480
Journal: Chemical Engineering Journal - Volume 354, 15 December 2018, Pages 473-480
نویسندگان
Qing Wang, Beibei Wang, Yuan Ma, Shengtao Xing,