催化氧化法進行廢水脫氮之可行性研究

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Title:	催化氧化法進行廢水脫氮之可行性研究 Nitrogen removal from wastewater by catalytic oxidation method
Authors:	鄭竹翔
Contributors:	環境工程與科學系陳世雄
Keywords:	催化氧化氨氮氫氧自由基 Catalytic oxidation ammonia nitrogen hydroxyl radical
Date:	2019
Issue Date:	2020-12-09 14:45:08 (UTC+8)
Abstract:	本研究目為製備含銅金屬觸媒應用於廢處理水中之氨氮污染物，研究中使用觸媒、氧化劑(雙氧水或臭氧)和UV共同催化氧化處理高濃度氨氮廢水，研究中改變觸媒金屬氧化物含量、酸鹼值、氨氮濃度以及改變添加於反應系統中的氧化劑種類，探討催化氧化變因對於氨氮廢水之處理效能之影響；並以螢光分析法測量不同條件下氫氧由基生成量；以離子層析儀(IC)測定廢水中氨氮的轉化率；以比表面積分析儀(BET)分析觸媒表面之孔隙分布與氧化活性之關聯性；最後以感應耦合電漿原子發射光譜儀測定金屬觸媒的金屬溶出量，探討銅金屬觸媒催化氧化水中氨氮之氧化效率之衰減。由雙氧水結合UV催化氧化實驗中，可以觀察到有效氫氧自由基活性生成，反應於0.05M雙氧水條件下應用於催化氧化處理含高濃度氨氮廢水時，可以有效地將80%氨氮轉化為硝酸態氮，而臭氧配合UV所進行催化氧化處理含氨氮反應於臭氧添加量(2L/min)並調整酸鹼值至8.5狀況下，發現具有更高氨氮轉化效率(99%以上)，最後加入其他輔助藥品時，可使硝酸態氮進一步反應而脫氮，其處理效能可達成79%的脫氮效率。 The purpose of this study is to prepare copper catalysts for removal of nitrogen from ammonium wastewater by catalytic oxidation. In this study, the effect of active metal content in catalyst, pH, ammonium concentration, and activity of oxidants on removal of nitrogen and oxidation efficiency were discussed and the efficiency of nitrogen removal were also concerned in this investigation. The fluorescence spectrum was used to discuss the free radical generation efficiency in catalyst oxidations. The products and intermediates of oxidation were quantitative measured by ion exchange chromatography. The BET was used to identify the pore properties and surface area of catalysts. The leaching metals were measured by the ICP to discuss the activity loss of catalyst. It was found that coupling UV and 0.05M hydrogen peroxide (H2O2) in catalytic oxidation system presented a high efficiency and presented a conversion of 80% N-NH4+ form wastewater. On the other hand, the coupling ozone (2L/min ozone) method showed a higher performance to convert over 99% N-NH4+ in catalytic oxidation. Additional salt additive can also successful oxidation N- N-NH4+ to form nitrate and further converted 79% to nitrogen with from wastewater was achieved with optimum salt additive in catalytic oxidation.
Relation:	電子全文公開日期：2024-07-19 學年度：107， 156頁
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Dissertations and Theses

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