臺灣博碩士論文加值系統

本研究探討苯與臭氧的水相反應。在不同pH值和反應物莫耳比（[C6H6]/[O3]）的條件下，苯與臭氧反應的初始產物分佈及濃度變化情形，進而推得其反應的趨勢。
實驗結果發現，在不同pH值和反應物莫耳比（[C6H6]/[O3]）下，苯與臭氧反應偵測到的產物只有1,4-Benzoquinone一種。在個別的pH值下（pH = 3.00、4.00、5.00、6.00、7.00、8.00），1,4-Benzoquinone增加的幅度隨反應物莫耳比（[C6H6]/[O3]）增加有減緩的趨勢。在個別的反應物莫耳比下（[C6H6]/[O3] = 0.2、0.8、1.5、2.0、3.0、5.0），1,4-Benzoquinone增加的幅度隨pH值增加有加快的趨勢。
實驗證實，無論苯與臭氧水相反應是直接臭氧化或是進行自由基反應，苯與臭氧的反應較易在對位進行產生Hydroquinone；而Hydroquinone再進一步氧化形成1,4-Benzoquinone。

Ozonation of benzene in aqueous solution by varying pH conditions and molar ratios ([C6H6]/[O3]) were studied. The initial ozonation products were examined and the initial reaction path is proposed.
Under all experiment conditions (pH = 3.00-8.00 and [C6H6]/[O3] = 0.2-5.0), only 1,4-benzoquinone (1,4-BQ) was detected. Compared with the individual pH condition (pH = 3.00, 4.00, 5.00, 6.00, 7.00 and 8.00), as the more ratio of [C6H6]/[O3] increased, the 1,4-BQ concentration increased, but the increasing rate decreased. Compared with the individual molar ratio condition ([C6H6]/[O3] = 0.2, 0.8, 1.5, 2.0, 3.0, 5.0), as the pH increased, the 1,4-BQ concentration increased, and the increasing rate increased.
The results show that ozonation of benzene is favor to react at the para-position of the hydroxyl function group, thus the hydroquinone (HQ) is formed, and 1,4-BQ is the further oxidation product of HQ.

中文摘要I
英文摘要II
目錄III
圖次V
表次VII
縮寫符號表VIII
壹、前言1
一、高級氧化法降解有機污染物2
二、臭氧氧化法5
三、苯的性質及其對環境的污染16
貳、儀器藥品22
一、儀器設備22
二、藥品23
三、藥品配製24
參、研究方法34
一、分析方法34
二、反應方法38
肆、結果與討論43
一、臭氧水溶液濃度測定43
二、分析方法建立之結果47
三、苯與臭氧水相反應的結果56
四、HQ與BQ轉換63
五、產物生成趨勢及反應途徑78
伍、結論82
陸、參考文獻84

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