کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
642373 1457035 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultrasound enhanced heterogeneous activation of peroxydisulfate by magnetite catalyst for the degradation of tetracycline in water
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Ultrasound enhanced heterogeneous activation of peroxydisulfate by magnetite catalyst for the degradation of tetracycline in water
چکیده انگلیسی

The removal of tetracycline by magnetite (Fe3O4) activated peroxydisulfate (Na2S2O8) in the presence of ultrasound irradiation has been performed in this study. The effects of Na2S2O8 concentration, Fe3O4 addition, ultrasonic power, initial concentration and initial pH on the degradation of tetracycline were investigated. The results showed that tetracycline removal rate increased with the increase of Fe3O4 dosage, but decreased with the increase of initial pH and initial tetracycline concentration. With the optimum values of Na2S2O8 concentration and ultrasound power, the highest degradation rate can be achieved. The scavenging effect was examined by using ethanol, tert-butyl alcohol and 1,4-benzoquinone to evaluate the roles of sulfate radicals, hydroxyl radicals and superoxide radicals. The results indicated that sulfate radicals and the hydroxyl radicals played important roles in the degradation of tetracycline by Fe3O4/Na2S2O8/US process.

Figure optionsDownload as PowerPoint slideHighlights
► Na2S2O8 was activated by magnetite and ultrasound for the degradation of tetracycline.
► The presence of different types of radical scavengers would inhibit the degradation rate.
► The oxidation mechanism on the surface of the heterogeneous catalyst is scarce.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 84, 9 January 2012, Pages 147–152
نویسندگان
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