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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/21401


    標題: 利用Fenton-like處理丙烯 水溶液之效率研究
    Oxidation of Acrylonitrile in Aqueous Solution by Fenton-Like Reagent
    作者: 張家源
    洪瑞雯
    鍾依靜
    廖正宇
    林曜文
    貢獻者: 環境工程與科學系
    關鍵字: 丙烯
    氮化物
    Acrylonitrile
    Fenton-like reagent
    Nitrogen-containing compounds
    日期: 2003
    上傳時間: 2009-06-12 13:08:13 (UTC+8)
    摘要: 本研究利用Fenton-like法處理丙烯 (Acrylonitrile)溶液,探討丙烯? 經Fenton-like法處理後丙烯 之殘餘率與氮化物生成及消長變化。研究結果顯示丙烯 之殘餘率隨著過氧化氫與三價鐵離子之添加量增加而減少,但亦不能添加過量,添加過量之三價鐵離子,反而會使丙烯 之去除效果下降。當系統中之丙烯 被Fenton-like試劑分解後,氮基會被氧化,氮基被氧化後除形成有機氮化物外,並反應釋出亞硝酸根離子與硝酸根離子。當固定三價鐵離子時,過氧化氫之初始加藥量提高,亞硝酸根離子與硝酸根離子產量也隨之上升,但是當固定過氧化氫,三價鐵離子之初始加藥量提高,亞硝酸根離子產量隨之上升,硝酸根離子產量以三價鐵離子濃度為300 mg/L時最高。此外,在Fenton-like系統中,亞硝酸根離子釋出後,在40分鐘左右可達到一最大值,而後其濃
    度開始下降,但在亞硝酸根離子下降時,硝酸根離子之濃度並無上升現象且漸趨平緩,而亞硝酸大部分皆於40分鐘時開始下降,但是氨氮產生量於10分鐘時為最大量,顯示此氧化反應中可能伴隨還原反應之進行。實驗中水溶液內有氣泡產生,研判產生之氣泡為氮氣,配合氮平衡實驗之推算,本研究亦初步推估氮氣之產生量。
    This research was to evaluate the treatment efficiency and formation of nitrogen-containing compounds from Fenton-like reaction of acrylonitrile (AN) in aqueous solution. In general, it is an effective method to remove acrylonitrile from the aqueous solution using Fenton-like method. The result showed that the removal efficiencies of AN and DOC increased with increasing of Fe3+. The same phenomenon was observed when the hydrogen peroxide concentration was varied. The highest removal efficiency of 100% and 55% for AN and DOC, respectively, was obtained in this study. On the study of nitrogen mass balance, immediately after the Fenton-like reagent addition, NO2- rose rapidly up to a peak and followed by a slow decline. The similar phenomenon of NH4 + was observed in this study. The concentration of NO3
    - increased with reaction time and then remained approximately constant. Formation of NO2-and NO3- increased with increasing of Fenton-like reagent dosage. Visible gas evolution from the reaction vessels suggested gaseous byproducts. Nitrogen gas yields were calculated from the nitrogen balance results. Nitrogen gas production accounted for about 90~94% of nitrogen in AN. The ideal-gas law was used to calculate the volume of nitrogen gas. The results showed that 40~44mL of nitrogen gas was produced during 1 hour Fenton-like reaction.
    Appears in Collections:[嘉南學報] 29 期 (2003)
    [環境工程與科學系(所)] 期刊論文

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