کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
583655 | 1453174 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Homogeneous catalytic ozonation of C.I. Reactive Red 2 by metallic ions in a bubble column reactor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Homogeneous catalytic ozonation of C.I. Reactive Red 2 by metallic ions in a bubble column reactor Homogeneous catalytic ozonation of C.I. Reactive Red 2 by metallic ions in a bubble column reactor](/preview/png/583655.png)
چکیده انگلیسی
This study elucidates the decolorization of C.I. Reactive Red 2 (RR2) by homogeneous catalytic ozonation. The effects of pH and catalyst dosage were evaluated in O3/Mn(II), O3/Fe(II), O3/Fe(III), O3/Zn(II), O3/Co(II) and O3/Ni(II) systems. In O3/Mn(II), O3/Fe(II) and O3/Fe(III) systems, increasing the catalyst concentration increased the rate of RR2 decolorization; however, further increasing the catalyst concentration caused no further significant increase. When 0.6Â mM catalyst was added, the decolorization rates of O3/Mn(II), O3/Fe(II), O3/Fe(III), O3/Zn(II), O3/Co(II) and O3/Ni(II) systems at pH 2 were 3.295, 1.299, 1.278, 1.015, 0.843 and 0.822Â minâ1, respectively. Under all of the experimental conditions, the decolorization efficiency of catalytic ozonation exceeded that of ozonation alone. The decolorization rate markedly exceeds the TOC removal rate in all tested systems. The effect of the radical scavenger on the catalytic ozonation processes suggests that the decolorization reaction in catalytic ozonation systems proceeds by mainly radical-type mechanisms, except in the O3/Mn(II) system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 154, Issues 1â3, 15 June 2008, Pages 748-755
Journal: Journal of Hazardous Materials - Volume 154, Issues 1â3, 15 June 2008, Pages 748-755
نویسندگان
Chung-Hsin Wu, Chao-Yin Kuo, Chung-Liang Chang,