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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 劉振宇(Chen-Wuing Liu) | |
| dc.contributor.author | Chia-Min Lee | en |
| dc.contributor.author | 李佳旻 | zh_TW |
| dc.date.accessioned | 2021-05-19T17:48:21Z | - |
| dc.date.available | 2029-09-21 | |
| dc.date.available | 2021-05-19T17:48:21Z | - |
| dc.date.copyright | 2019-12-25 | |
| dc.date.issued | 2019 | |
| dc.date.submitted | 2019-12-10 | |
| dc.identifier.citation | Adriano, D. (2001). Trace Elements in Terrestrial Environments Springer-Verlag, New York–Berlin–Heidelberg. In.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/7629 | - |
| dc.description.abstract | 本研究將二氧化鈦(P25)搭配三種鐵氧化物(FeO(OH)、α-Fe2O3、γ-Fe2O3)及水合二氧化錳(MnO2-H2O)於150℃下進行水熱合成，製備出二氧化鈦奈米吸附材，本研究針對TNT(100 wt.% P25)、α-Fe(10)(90 wt.% P25 + 10 wt.% α-Fe2O3)、FeO(OH)(10)(90 wt.% P25 + 10 wt.% FeO(OH))、γ-Fe(5)(95 wt.% P25 + 5 wt.% γ-Fe2O3)、Mn(2.5) (92.5 wt.% P25 + 5 wt.% γ-Fe2O3+ 2.5 wt.% MnO2)等五種奈米吸附材進行比表面積(BET)、傅立葉轉換紅外光譜(FTIR)、穿透式電子顯微鏡(TEM)、X射線光電子能譜儀(XPS)、X-ray繞射分析儀(XRD)等物性分析，並進行水中砷污染去除試驗，藉此比較各材料於相異毫克數、砷濃度與pH值下對三價砷及五價砷之吸附效率。研究結果顯示鐵摻雜較容易使吸附材結構形成管狀，提高吸附材之比表面積，經過水熱反應後奈米吸附材比表面積較原材料P25高出4-6倍，而鐵錳摻雜之比表面積又較無摻雜TNT高出18-28%。γ鐵摻雜能夠使吸附材形成更多氧空缺，這些結構缺位更容易使砷酸根吸附。20 mg之TNT、α-Fe(10)、FeO(OH)(10)、γ-Fe(5)、Mn(2.5)對15 ppm(100 ml)五價砷之吸附效果分別約為32%、33%、33%、38%及36%；20 mg之TNT、α-Fe(10)、FeO(OH)(10)、γ-Fe(5)、Mn(2.5)對15 ppm(100 ml)三價砷之吸附效果分別約為15%、16%、16%、19%及20%，所有材料皆於60分鐘達95%吸附飽和，而在不同pH值條件下對五價砷以及三價砷去除效率隨著pH值增加而降低。Mn(2.5)在避光吸附下對15 ppm之三價砷具38%之氧化效果，γ-Fe(5)具有最佳之吸附效率且粉末具有磁性有助於粉末快速沉澱及回收再利用。 | zh_TW |
| dc.description.abstract | In this study, Fe/Mn-doped TiO2 nanotubes were synthesized via hydrothermal process at 150oC by using P25, FeO(OH),α-Fe2O3, γ-Fe2O3, and MnO2-H2O at different ratios (0 wt.%, 2.5 wt.%, 5 wt.%, and 10 wt.%). After hydrothermal synthesis, physical properties were examined by using Brunauer-Emmett-Teller surface area analyzer (BET), Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscope (TEM), X-Ray Photoelectron Spectroscopy (XPS), and X-ray diffraction analysis (XRD). TNT, α-Fe(10), FeO(OH)(10), γ-Fe(5), and Mn(2.5) were applied to remove arsenate (As5+) and arsenite (As3+) in the aqueous. As5+ and As3+ adsorption tests were carried out at different sample weight, arsenic concentration, and pH conditions. Experimental results show that higher specific surface area and better tubular shape were observed after hydrothermal synthesis. Specific surface area of Fe/Mn-doped material increases by 18%-28%, compared with TNT without Fe/Mn-doped. A more structural vacancy was observed in γ-Fe-doped materials, which could increase the arsenic adsorption efficiency. The adsorption efficiency of per 20 mg TNT, α-Fe(10), FeO(OH)(10), γ-Fe(5) and Mn(2.5) for 15 ppm (100 ml) arsenic aqueous are 32%, 33%, 33%, 38% and 36%, respectively. In the same test condition, the adsorption efficiencies of those materials for As3+ are 15% (TNT), 16% (α-Fe(10)), 16% (FeO(OH)(10)), 19% (γ-Fe(5)), and 20% (Mn(2.5)), respectively. In a dark experiment, Mn(2.5) can oxidize 38% As3+ into As5+. γ-Fe(5) is the best material for arsenic adsorption compared to the other material in this study. Moreover, the magnetic γ-Fe(5) properties of the powder contribute to precipitate and recycle more easily. | en |
| dc.description.provenance | Made available in DSpace on 2021-05-19T17:48:21Z (GMT). No. of bitstreams: 1 ntu-108-R06622028-1.pdf: 3413862 bytes, checksum: 0683fd4c25d54b23b4ab4479851ba1b7 (MD5) Previous issue date: 2019 | en |
| dc.description.tableofcontents | 目錄
摘要 I Abstract II 目錄 III 表目錄 VI 圖目錄 VII 第一章 前言 1 1.1研究緣起 1 1.2研究動機 2 1.3研究目的 3 第二章 文獻回顧 4 2.1砷簡介 4 2.1.1砷的來源及分布 4 2.1.2物化特性及毒理性質 6 2.1.3去除方法 7 2.2 吸附機制 9 2.3二氧化鈦之基本特性 10 2.3.1晶體結構 10 2.4 奈米鈦管之簡介 11 2.4.1水熱合成法 12 2.4.2合成機制 13 2.5 鐵錳氧化物摻雜 14 2.6吸附模式 17 2.7 鐵摻雜水熱合吸附砷機制 19 第三章 材料與方法 21 3.1 實驗架構 21 3.2 實驗材料與儀器 22 3.3 實驗流程 25 3.3.1水合二氧化錳製備 25 3.3.2 奈米鈦管製備 25 3.4 吸附實驗 26 3.4.1相異克數吸附 26 3.4.2等溫吸附 26 3.4.3動力吸附 26 3.4.4不同pH吸附 26 3.4.5 錳氧化能力試驗 26 3.5 儀器原理 27 3.5.1傅立葉轉換紅外光譜(Fourier-transform infrared spectroscopy, FTIR) 27 3.5.2穿透式電子顯微鏡(Transmission electron microscope, TEM) 28 3.5.3 X-射線繞射分析儀(X-ray diffraction spectroscopy, XRD) 29 3.5.4 X-射線光電子能譜儀(X-ray photoelectron spectroscopy, XPS) 30 3.5.5 感應耦合電漿發射光譜儀 (Inductively couple plasma optical emission spectrometry, ICP-OES) 31 3.5.6 比表面積及孔隙分布分析(High resolution surface area and porosimetry analyser) (ASAP/BET) 33 第四章 實驗結果與討論 38 4.1 物性分析 38 4.1.1 比表面積分析(BET) 38 4.1.2穿透式電子顯微鏡(TEM)影像 41 4.1.3傅立葉轉換紅外光譜(FTIR) 44 4.1.4 X-射線光電子能譜(XPS) 45 4.1.5 X-射線繞射分析儀(XRD) 49 4.2 五價砷吸附 51 4.2.1動力吸附 51 4.2.2 相異克數吸附 52 4.2.3 等溫吸附 55 4.2.4 不同pH吸附 61 4.3三價砷吸附 64 4.3.1 動力吸附 64 4.3.2 等溫吸附 65 4.3.3 不同pH吸附 71 4.4 錳氧化能力試驗 73 4.5相似吸附材比較 75 4.6 綜合討論 78 第五章 結論與建議 79 5.1 結論 79 5.2 建議 81 參考文獻 82 | |
| dc.language.iso | zh-TW | |
| dc.title | 鐵錳摻雜二氧化鈦奈米管對砷之去除 | zh_TW |
| dc.title | Removal of Arsenic by Iron/Manganese-doped Titanium Dioxide Nanotubes | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 108-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 席行正(Hsing-Cheng Hsi),范致豪(Chih-Hao Fan),蔡政諺(Cheng-Yen Tsai) | |
| dc.subject.keyword | 砷,奈米鈦管,鐵改質,鐵錳改質,吸附, | zh_TW |
| dc.subject.keyword | arsenic,TiO2 nanotubes,iron modification,iron/manganese modification,adsorption., | en |
| dc.relation.page | 88 | |
| dc.identifier.doi | 10.6342/NTU201904162 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2019-12-10 | |
| dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
| dc.contributor.author-dept | 生物環境系統工程學研究所 | zh_TW |
| dc.date.embargo-lift | 2029-09-21 | - |
| 顯示於系所單位： | 生物環境系統工程學系 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-108-1.pdf 此日期後於網路公開 2029-09-21 | 3.33 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。