【正文】 新型三組份催化劑在臭氧化降解有機物中的應用及優(yōu)化 摘 要 水環(huán)境污染是普遍存在的問題． 對于水中具有高化學穩(wěn)定性、有毒難生物降解的有機污染物，基于強氧化性和無污染性，臭氧氧化技術得到極大的發(fā)展，但它單獨臭氧氧化技術存在高選擇性和高耗能性，因此基于強化臭氧氧化技術引起水處理工作的極大興趣，其中尤以催化臭氧化技術最受關注。 對于催化臭氧化技術，固體催化劑性能選擇是催化體系是否具有高氧化性的關鍵。為了提高臭氧化降解乙酸的效率，本實驗通過通過浸漬法制備了一種新型催化 V2O5TiO2AlF3/Al2O3催化劑， 通過 催化臭氧化過程中乙酸的降解效果來評價催化劑的活性。同時實驗還 研究了制備催化劑的條件對催化劑活性的影響（如催化劑前驅(qū)體濃度的選擇、催化劑表明釩鈦比等）， 結果表明 ,增加前驅(qū)體的濃度或增大催化劑表面釩鈦比都有助于增加催化活性。 此外實驗還優(yōu)化各工藝參數(shù)對乙酸去除率的影響，如 pH,臭氧功率，氣流率等。實驗還進一步探討該催化體系的機理，叔丁醇實驗表明， VO2TiO2/Al2O3 催化臭氧化降解乙酸機制符合羥基自由基機理。 關鍵詞 ： 催化臭氧化 ， V2O5TiO2AlF3/Al2O3， 羥基自由基 ， 乙酸 CATALYTIC OZONE OXIDATION DEGRADATION ACETIC ACID ABSTRACT Water pollution is a widespread problem. For those anic pollutants with high chemical stability and toxic nonbiodegradable in water， ozone oxidation technology has been tremendous growth based on its strong oxidizing and nonpolluting, but separate ozone oxidation technology of high selectivity and high energy consumption, therefore causing great interest of water treatment based on strengthening the ozone， which catalytic ozonation was gotten most attention. For catalytic ozonation technology, catalyzed by solid catalyst selection is the key to whether the system has high oxidation. In order to improve the efficiency of the ozonation of acetic acid , prepared by impregnation method the catalyst V2O5TiO2AlF3/Al2O3 . Acetic acid degradation catalytic ozonation process to evaluate the catalytic activity. The factors affecting the catalyst activity ( such as the surface of the catalyst vanadium loading ) was study in the Experimental . The results showed that the increasing of vanadium and titanium rato improved the catalytic activity. In addition , the experimental optimization of process parameters on the removal rate of acetic acid. The test of tertbutyl alcohol addition indicated that the catalytic ozonation of acetic acid followed hydroxyl radicaltype mechanism. KEY WORDS： catalytic ozonation， V2O5TiO2AlF3/Al2O3, hydroxyl radicals， acetic acid 目 錄 ABSTRACT...................................................................................................................... 2 第一章 緒論 ..................................................................................................................... 5 臭氧氧化水處 理技術 ......................................................................................... 5 臭氧的物理化學性質(zhì) ......................................................................................... 6 羥基自由基 ( OH)的性質(zhì) ................................................................................. 7 臭氧的消毒作用 ................................................................................................ 8 臭氧氧化機理 .................................................................................................... 8 單獨臭氧化水處理的缺陷 ................................................................................ 10 臭氧類高級氧化技術 ....................................................................................... 11 H2O2/O3水處理體系 ...................................................................................... 12 UV/O3處理技術 ............................................................................................ 12 均相催化臭氧化 ............................................................................................ 13 異相催化臭氧化技術 ..................................................................................... 14 催化劑表面性質(zhì)對催化劑活性的影響 ............................................................ 14 不同催化劑的前體對催化劑活性的影響 ......................................................... 15 煅燒溫度對催化劑活性的影響 ...................................................................... 15 活性組分比例對催化劑活性的影響 ............................................................... 15 催化劑失活 .................................................................................................. 16 異相催化臭氧化機理 ....................................................................................... 16 本論文研究目的和主要任務 ............................................................................. 18 第二章 實驗部分 .......................................................................................................... 20 實驗試劑與儀器 .............................................................................................. 20 實驗試劑 ........................................................................................................ 20 實驗儀器 ........................................................................................................ 20 實驗裝置流程 .................................................................................................. 20 實驗分析方法 .................................................................................................. 21 化學需氧量 (COD)測定 .................................................................................... 21 溶液中 pH 值測定 ........................................................................................... 21 重鉻酸鉀測定的方法原理 ................................................................................ 22 催化劑的制備方法 .......................................................................................... 22 第三章 結果與討論 ...................................................................................................... 23 不同體系對催化臭氧化去除乙酸的效能影響 ...................................................... 23 負載不同釩鈦比對催化劑活性的影響 ................................................................. 23 不同濃度的 NaF前驅(qū)體對催化劑活性的影響 ..................................................... 24 pH值對催化臭氧化降解乙酸的影響 ................................................................... 25 臭氧濃度對催化臭氧化降解乙酸的影響 ............................................................. 26 氣流量對催化臭氧化降解乙酸的影響 ................................................................. 27 TBA對催化臭氧化降解乙酸的影響 .................................................................... 28 結論 .