کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
54426 | 47009 | 2015 | 9 صفحه PDF | دانلود رایگان |
• FeOOH-derived materials have shown to be highly active and stable catalysts for AOPs.
• High removal and mineralization degrees of CFA achieved in short reaction times.
• Addition of little amount of Pd on FeOOH improved the activity and stability.
• 66 and 68% mineralization after 2 h of Fenton-like and catalytic ozonation, respectively.
• Parametric study leads to the optimization of Fenton-like process.
In this study the degradation of an aqueous solution of clofibric acid was investigated during catalytic ozonation and Fenton-like process with FeOOH – derived catalysts. From the different calcination temperatures tested, it has been observed that the most active catalyst is the commercial FeOOH calcined at 200 °C, when maghemite and hematite are the predominant phases obtained. The best result, at room temperature, for CFA mineralization was observed over 0.5 wt% Pd on FeOOH (calcined at 200 °C) among all tested catalysts, achieving 68% and 81% mineralization degree, in 2 h and 6 h, respectively, in catalytic ozonation and 66% and 71% of mineralization degree within 2 h and 6 h, respectively for Fenton process. The efficiency of the Fenton-like process is enhanced at higher temperature (40–60 °C), reaching a mineralization degree up to 82% in 6 h. Furthermore, Pd impregnation on FeOOH increased the catalyst stability.
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Journal: Catalysis Today - Volume 240, Part A, 1 February 2015, Pages 46–54