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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李慧梅 | |
| dc.contributor.author | Yan-Jie Chen | en |
| dc.contributor.author | 陳彥潔 | zh_TW |
| dc.date.accessioned | 2021-06-15T02:45:49Z | - |
| dc.date.available | 2011-08-14 | |
| dc.date.copyright | 2009-08-14 | |
| dc.date.issued | 2009 | |
| dc.date.submitted | 2009-08-09 | |
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Yao, M., G. Mainelis and H.R . An, “Inactivation of Microorganisms Using Electrostatic Fields,” Environmental Science & Technology, 39, 3338-3344 (2005). 53. Yu, K.-P., G.W.-M Lee, S.Y. Lin and C.P. Huang, “Removal of bioaerosols by the combination of a photocatalytic filter and negative air ions,” Aerosol Science and Technology 39, 377–392 (2008). 54. 吳致呈，空氣負離子控制室內空氣污染之研究。國立台灣大學環境工程研究所博士論文(2006)。 55. 曾國瑋，奈米銀濾材處理生物氣膠之研究，國立台灣大學環境工程研究所碩士論文(2006)。 56. 婁嘉玲，紫外光與光觸媒濾材對生物氣膠殺菌效率之研究，國立台灣大學環境工程研究所碩士論文(2005)。 57. 林思瑩，結合光觸媒與空氣負離子控制生物氣膠之研究，國立台灣大學環境工程研究所碩士論文(2007)。 58. 黃建賓，奈米碳管空氣負離子產生裝置控制生物氣膠之研究，國立台灣大學環境工程研究所碩士論文(2008)。 59. 管俊亭，奈米碳管空氣負離子產生裝置控制懸浮微粒之研究，國立台灣大學環境工程研究所碩士論文(2007)。 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44224 | - |
| dc.description.abstract | 本研究評估使用奈米碳管作為場發射材料產生空氣負離子在鼻下呼吸範圍中對生物氣膠的控制效能。在生物氣膠方面選擇大腸桿菌( Escherichia coli, E. coli )、枯草桿菌( B. subtilis )、酵母菌( C. famata )、青黴菌( P. citrinum )，鼻下呼吸範圍定義為以下巴為中心6 cm半徑之圓切面自面部前方0 cm至12 cm之圓柱空間。研究目的為模擬奈米碳管產生空氣負離子微型裝置佩帶在鼻下18 cm處，評估對鼻下呼吸範圍之生物氣膠的控制效果。首先探討空氣負離子在呼吸範圍中的分布狀況以及對四種生物氣膠的控制效率分佈，進而比較四種生物氣膠控制效率的差異，最後探討空氣負離子穩定度對生物氣膠控制效率的影響。
研究結果發現，空氣負離子在呼吸範圍中的濃度分佈在面部前方5 cm處最高，隨與空氣負離子產生源距離增加而衰減，由於面部會中和負電荷，故也會使空氣負離子濃度驟減。整體呼吸範圍中的空氣負離子濃度皆在3.02×105 ions/cm3以上。在生物氣膠控制效率方面，E. coli平均控制效率為25%∼44%，B. subtilis平均控制效率為26%∼39%，兩者皆在面部前方5∼12 cm之間有最佳控制效率；C. famata平均控效率為29%∼42%，在面部前方有最佳控制效率；P. citrinum平均控制效率為41%∼48%，是四種生物氣膠中控制效果最好的氣膠物種。整體而言，面部前方5∼12 cm之間有最佳控制效率。由四種生物氣膠之控制效率分佈可發現，粒徑大小與氣膠吸濕性會影響控制效率分佈。在靠近面部處，粒徑大的真菌氣膠控制效率會高於粒徑小的細菌氣膠；在空氣負離子以水合狀態存在時，吸濕性佳的E. coli氣膠控制效率會高於吸濕性較差的B. sutilis氣膠。此外，由改變空氣負離子實驗的結果得知，提升空氣負離子穩定度可有效增加對生物氣膠的控制效率。 | zh_TW |
| dc.description.abstract | The purpose of this study was to evaluate the distribution of control efficiency on bioaerosols in the breathing space by using negative air ions (NAIs) which was produced by carbon nanotubes (CNTs). The species of bioaerosol we used were Escherichia coli (E. coli), B. subtilis, C. famata and P. citrinum. The breathing space is defined as a circle surface in front of the mask from 0 to 12 cm. The center of the circle surface was the chin, and the diameter of the circle was 6 cm.
This study investigated the distribution of NAIs in the breath space. The results indicated that the highest NAIs concentration was distributed 5 cm far in front of the mask, and the NAIs concentration was decayed with the distance to the ionizer. The NAIs concentration also decayed on the mask surface due to electric neutralization. The ionizer can keep the NAIs concentration above 3.02×105 ions/cm3 in the breathing space. This study investigated the distribution of control efficiency for four kinds of bioaerosols, and compared the difference of them. There was 25% to 44% average control efficiency for E. coli, and 26% to 39% average control efficiency for B. subtilis. The best control area for both of bacteria aerosols was 5 cm to 12cm in front of the mask. For fungal aerosol, there was 29% to 42% average control efficiency for C. famata, and the best control area was close to the mask. And P. citrinum had best control efficiency. There was 41% to 48% average control efficiency for P. citrinum. According to the results, the diameter of bioaerosols and the hygroscopic growth of the aerosol were the factors influenced the control efficiency. The control efficiency of fungal aerosols with larger particle size (> 2 μm) was better than bacteria aerosols with smaller particle size (<1 μm). When the NAIs combined with H2O molecules, the control efficiency of E. coli aerosol was better than B. subtilis due to difference in hygroscopic characteristics. At the last, this study investigated the bioaerosols control efficiency in different stable level of NAIs. The results indicated that the control efficiency was increased with the stable NAIs concentration. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T02:45:49Z (GMT). No. of bitstreams: 1 ntu-98-R96541128-1.pdf: 4383909 bytes, checksum: ceaf9fe0bc0046f18e6839fab2b321f1 (MD5) Previous issue date: 2009 | en |
| dc.description.tableofcontents | 第一章 緒論 1
1-1 研究緣起 1 1-2 研究目的 3 1-3 研究內容與方法 3 1-4 研究流程 4 第二章 文獻回顧 5 2-1 生物氣膠 5 2-1-1 生物氣膠定義 5 2-1-2 生物氣膠產生方式 6 2-1-3 生物氣膠種類 7 2-1-3-1 病毒氣膠 7 2-1-3-2 細菌氣膠 8 2-1-3-3 真菌氣膠 9 2-1-4 生物氣膠對人體的危害 10 2-1-5 生物氣膠採樣技術 14 2-1-6 生物氣膠濃度檢測方式 15 2-1-6-1 培養法 15 2-1-6-2 非培養法 16 2-1-7 室內生物性氣膠濃度之相關建議值 19 2-1-8 室內生物氣膠控制技術 20 2-1-8-1 濾材控制技術 20 2-1-8-2 靜電收集技術 21 2-1-8-3 UV/光觸媒控制技術 22 2-1-8-4 臭氧控制技術 23 2-1-8-5 空氣負離子控制技術 23 2-2空氣負離子 24 2-2-1 空氣負離子產生方式 24 2-2-2 空氣負離子基本特性與影響因子 25 2-2-3 負離子的生成與演化機制 26 2-2-4 空氣負離子對室內懸浮微粒的控制效能 28 2-2-5 空氣負離子對室內生物氣膠的控制效能 29 2-3 奈米碳管 32 2-3-1 奈米碳管的結構 33 2-3-2 奈米碳管的分類 34 2-3-3 奈米碳管之製備方式 36 2-3-3-1 電弧放電法 36 2-3-3-2 雷射蒸發法 37 2-3-3-3 化學氣相沉積法 38 2-3-4 奈米碳管之場發射特性 39 第三章 實驗設備與方法 41 3-1 實驗系統 41 3-1-1 實驗設備 44 3-1-2 生物氣膠培養方法 46 3-1-2-1 大腸桿菌( Escherichia coli) 47 3-1-2-2 枯草桿菌 ( Bacillus subtilis ) 47 3-1-2-3 酵母菌 ( C. famata ) 48 3-1-2-4 青黴菌 ( P. citrinum ) 48 3-1-3 生物氣膠產生系統 49 3-1-4 負離子產生系統及監測設備 49 3-1-5 生物氣膠產生系統 51 3-2 研究方法 52 3-2-1 前置實驗 52 3-2-1-1 菌液稀釋度測試 52 3-2-1-2 負離子濃度與放電電壓值相關性測試 53 3-2-2 採樣點空間分佈 54 3-2-3 稀釋區的設置 55 3-3 實驗計算方法與指標參數 56 第四章 結果與討論 58 4-1 前置實驗 59 4-1-1 生物氣膠初始濃度測試 59 4-1-2 模擬箱混合度測試 61 4-1-3 放電電壓測試 62 4-1-3-1 不鏽鋼針尖沾附奈米碳管產生負離子穩定度測試 63 4-1-3-2 不鏽鋼針尖放電產生空氣負離子穩定度測試 65 4-1-4 生物氣膠控制效率影響因子之探討 67 4-2 空氣負離子濃度之空間分佈 69 4-2-1空氣負離子之空間分佈 70 4-3生物氣膠控制效率及效率空間分佈 75 4-3-1 空氣負離子對E. coli氣膠控制效率之空間分佈 75 4-3-2 空氣負離子對B. subtilis氣膠控制效率之空間分佈 79 4-3-3 空氣負離子對C. famata氣膠控制效率之空間分佈 84 4-3-4 空氣負離子對P. citrinum氣膠控制效率之空間分佈 88 4-4 不同生物氣膠整體控制效率比較與探討 92 4-4-1 不同細菌氣膠之控制效率差異 93 4-4-2 不同真菌氣膠之控制效率差異 95 4-4-3 細菌與真菌氣膠之控制效率差異 97 4-4-3-1 整體控制效率 97 4-4-3-2 Y=0 cm平面控制效率 100 4-5 空氣負離子穩定度對控制效率之影響 102 4-6 本研究結果與其他空氣負離子控制生物氣膠之結果比較 104 第五章 結論與建議 107 5-1 結論 107 5-2 建議 110 參考文獻 111 | |
| dc.language.iso | zh-TW | |
| dc.subject | 呼吸範圍 | zh_TW |
| dc.subject | 生物氣膠 | zh_TW |
| dc.subject | 空氣負離 | zh_TW |
| dc.subject | 子 | zh_TW |
| dc.subject | 米碳管 | zh_TW |
| dc.subject | Bioaerosol | en |
| dc.subject | Carbon nanotube | en |
| dc.subject | Breathing space | en |
| dc.subject | Negative air ion | en |
| dc.title | 奈米碳管產生空氣負離子裝置控制生物氣膠效率空間分布之研究 | zh_TW |
| dc.title | The spacial distribution of control efficiency of bioaerosol by negative air ions generated by carbon nanotube | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 97-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 張靜文,黃小林 | |
| dc.subject.keyword | 生物氣膠,空氣負離,子,奈,米碳管,呼吸範圍, | zh_TW |
| dc.subject.keyword | Bioaerosol,Negative air ion,Carbon nanotube,Breathing space, | en |
| dc.relation.page | 117 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2009-08-10 | |
| 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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