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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林正芳 | |
dc.contributor.author | Wei-Jie Huang | en |
dc.contributor.author | 黃偉傑 | zh_TW |
dc.date.accessioned | 2021-06-13T04:11:15Z | - |
dc.date.available | 2007-07-30 | |
dc.date.copyright | 2006-07-30 | |
dc.date.issued | 2006 | |
dc.date.submitted | 2006-07-25 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/32520 | - |
dc.description.abstract | 本研究之目的為利用覆鍍TiO2於薄膜表面,藉此改善腐質酸所造成之通量衰減問題,並透過不同TOC濃度之腐質酸(2及9 mg/L),不同透膜壓差(70、100及140 kPa),不同掃流速度(0.22、0.10、0.05 m/sec),以及兩種薄膜孔徑(0.14 μm、50 kD)等參數所進行之滲透實驗,來觀察操作條件不同對於通量衰減程度、TOC去除率以及膜面上積垢量,這三者分析之影響。
在TOC濃度為9 mg/L,透膜壓差為100 kPa,掃流速度為0.22 m/sec的條件下,過濾8小時後,經覆鍍TiO2於陶瓷膜上,其通量僅衰減至39%,相較於無經過膜面改質程序之陶瓷膜,通量則衰減至3%,不過在TOC去除率上卻無法有顯著之效果,而利用質量平衡理論估算出膜面上積垢量有下降之趨勢,證明膜面上之確實能將積垢分解,也因此使分子量較小之腐質酸通過薄膜表面增加滲流液TOC濃度。 0.14 μm薄膜以腐質酸濃度9 mg/L,過濾8小時後,在隨著透膜壓差增加,通量衰減程度越嚴重,這是因為透膜壓差越高,通過薄膜孔隙之腐質酸也隨著增大,而膜面上積垢量也隨之增加,造成通量迅速衰減。 掃流速度之快慢,意即代表腐質酸在模組內停留時間之長短,而因此影響膜面上之積垢量,所以掃流速度為0.22 m/sec時,膜面上積垢量為6.32 g/m2,掃流速度為0.10、0.05 m/sec時,膜面上積垢量分別為6.87 g/m2,7.48 g/m2。 孔徑越小之薄膜,雖然預期可以攔截更多之腐質酸,但卻在覆鍍TiO2過程中,會有不均勻狀況產生,因此在去除滲流液TOC效果上並不佳。 | zh_TW |
dc.description.abstract | Photocatalytic membrane reactors using titanium dioxide immobilized on ceramic membrane were utilized to improve flux decline by humic acid. Different parameters such as TOC concentration (2 and 9 mg/L), transmembrane pressure(70, 100 and 140 kPa), crossflow velocity(0.22, 0.10 and 0.05 m/sec) and pore size(0.14 μm and 50 kD) are used to observe the influences of flux decline, TOC rejection and the amount of foulent on membrane’s surface.
After 8 hours ultrafiltration, the flux of porous titanium dioxide membrane decayed to 39% when TOC concentration is 9 mg/L, transmembrane pressure is 100 kPa and crossflow velocity is 0.22 m/sec. Otherwise, the flux of membrane without modification decayed to 3%. On the contrary, the former has no obviously influence on TOC rejection which is considered to be caused by membrane fouling degraded into smaller molecular weight by photocatalytic reaction. The smaller molecule can pass through the membrane, so the TOC concentration increased. The higher transmembrane pressure is used, the more amount of humic acid pass through the membrane. Therefore, the amount of foulent accumulated on membrane surface much more and the permeate flux will decrease relatively. The speed of crossflow velocity means that the retention time of humic acid staying at module. It will result greater influence on membrane’s fouling and permeate flux. In addition, we expected that the smaller pore size of membrane(50 kD) can intercept more humic acid. However it has a drawback of coating uniformly, thus the TOC rejection was not increased. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T04:11:15Z (GMT). No. of bitstreams: 1 ntu-95-R93541129-1.pdf: 3468122 bytes, checksum: d7685049cddcdbfe0359987c8fcfb6ba (MD5) Previous issue date: 2006 | en |
dc.description.tableofcontents | 第一章 前言 1
1-1 研究動機 1 1-2 研究內容與項目 3 第二章 文獻回顧 4 2-1 天然有機物 4 2-2 光觸媒與光催化反應介紹 5 2-2-1 光觸媒 5 2-2-2 光催化反應 7 2-3 無機膜之簡介 9 2-3-1 無機膜之種類 9 2-3-2 無機膜之特性 11 2-4 分離及回收光觸媒之相關研究 12 2-5 混合薄膜及光催化系統之相關研究 15 2-5-1 合併光催化反應與薄膜處理系統 16 2-5-2 光觸媒固定於薄膜表面 18 第三章 實驗內容與設備 21 3-1 實驗流程與設計 21 3-1-1 實驗架構 21 3-1-2 操作參數 23 3-2 實驗材料與器材 24 3-2-1 模組裝置 24 3-2-2 藥品 26 3-3 實驗步驟 27 3-3-1 薄膜前處理 27 3-3-2 多孔性二氧化鈦薄膜製備 27 3-3-3 腐植酸溶液配置 29 3-3-4 膜面改質操作程序 29 3-4 分析方法與儀器 30 3-4-1 總有機碳(TOC)濃度分析 30 3-4-2 紫外光-可見光光譜儀 31 3-4-3 霍氏轉換紅外光譜儀 31 3-4-4 原子力顯微鏡 32 3-4-5 場發射掃描式電子顯微鏡 32 第四章 結果與討論 33 4-1 TiO2物化特性分析 33 4-1-1 光觸媒之微型態觀察 33 4-1-2 紫外光-可見光光譜分析 35 4-1-3 光觸媒晶相分析 35 4-2 多孔性二氧化鈦薄膜特性分析 37 4-2-1 TiO2燒結量及次數之影響 37 4-2-2 薄膜表面結構觀察 38 4-3 過濾實驗 41 4-3-1 高溫影響實驗 41 4-3-2 緻密實驗 43 4-3-3 膜面改質實驗 45 4-3-4 透膜壓差對於膜面改質效果之影響 56 4-3-5 掃流速度對於膜面改質效果之影響 58 4-3-6 薄膜孔徑對於膜面改質效果之影響 62 第五章 結論與建議 68 5-1 結論 68 5-2 建議 69 參考文獻 70 附錄 75 | |
dc.language.iso | zh-TW | |
dc.title | 以TiO2光觸媒進行薄膜表面改質之研究 | zh_TW |
dc.title | A study of membrane surface modified by titanium dioxide | en |
dc.type | Thesis | |
dc.date.schoolyear | 94-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 郝晶瑾,馬鴻文 | |
dc.subject.keyword | 膜面改質,光催化反應,腐質酸,多孔性二氧化鈦薄膜,延緩通量衰減, | zh_TW |
dc.subject.keyword | Membrane modification,Photocatalysis,Humic acid,Porous titanium dioxide membrane,Improve flux decline, | en |
dc.relation.page | 94 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2006-07-26 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
顯示於系所單位: | 環境工程學研究所 |
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