| 水相中CCl4和CHCl3的紫外光解机理 |
| 摘要点击 940 全文点击 1480 投稿时间：2000-10-13 |
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| 中文关键词 水相 四氯化碳 氯仿 瞬态吸收光谱技术 瞬态光谱 自由基 |
| 英文关键词 aqueous CCl4 CHCl3 transient absorption spectra radical |
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| 中文摘要 |
| 利用瞬态吸收光谱技术研究水体污染物CCl4和CHCl3在紫外光照条件下的转化和归宿,表明在248nm激光作用下,CCl4解离为CCl3和Cl自由基;CHCl3在此条件下不解离,但加入少量的苯后即发生明显解离,产生CHCl2和Cl自由基.在有氧条件下,光解产生的CCl3和CHCl2自由基均与O2反应分别生成CCl3O2和CHCl2O2;在无氧条件下,CCl3和CHCl2则发生偶合反应分别生成C2Cl6和C2H2Cl4.本研究还得出了一些微观速率常数. |
| 英文摘要 |
| The photolysis mechanism of CCl4 and CHCl3 in water was studied by using transient absorption spectra. The results showed that aqueous CCl4 was dissociated into CCl3 and Cl radicals by 248 nm laser ,and CHCl3 was dissociated into CHCl2 and Cl radicals after adding C6H6. The radicals CCl3 and CHCl2 were able to react with O2 to form CCl3O2 and CHCl2O2 respectively, or to form C2Cl6 and C2H2Cl4 without O2. The rate coefficients of some reactions were obtained. |
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