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系統識別號 U0026-2107202017163500
論文名稱(中文) 利用碘化鉀於長時間甲醛與乙醛採樣去除臭氧及二氧化氮
論文名稱(英文) Using potassium iodide to remove ozone and nitrogen dioxide in long duration formaldehyde and acetaldehyde sampling
校院名稱 成功大學
系所名稱(中) 環境工程學系
系所名稱(英) Department of Environmental Engineering
學年度 108
學期 2
出版年 109
研究生(中文) 劉士維
研究生(英文) Shih-Wei Liu
學號 P56071086
學位類別 碩士
語文別 中文
論文頁數 102頁
口試委員 指導教授-吳義林
口試委員-賴進興
口試委員-林清和
口試委員-巫月春
中文關鍵字 甲醛  乙醛  臭氧干擾  二氧化氮干擾 
英文關鍵字 Formaldehyde  Acetaldehyde  O3 interference  NO2 interference 
學科別分類
中文摘要 醛酮類化合物,是指醛與酮這兩種含有碳氧雙鍵的物質,近年來越來越受重視,因為其被視為大氣中光化學反應的關鍵參與物種。由於其對於人類潛在性的健康危害,例如大氣中含量最多的甲醛已被IARC確認為人體致癌姓,因次必須對這些物種進行嚴格的監測。最為常見且已被公告為標準方法的採樣分析為利用2,4-dinitrophenylhydrazine (DNPH)與醛酮類物質進行衍生化反應。然而此方法在進行採樣時,容易受到O3及NO2的干擾,因此使用到碘化鉀來去除兩者。當利用含碘化鉀結晶的市售ozone scrubber進行長時間採樣時,發現會產生堵塞問題。本研究的目的為找出並解決堵塞原因,並測試其它含碘化鉀的scrubber其對於O3及NO2是否也有高去除效率。
利用離子層析及化學沉澱方法判斷潮解的碘化鉀為堵塞的主要因素,可以透過加熱改變相對濕度來解決。另外挑選塗覆碘化鉀的銅管和自行填充碘化鉀粉末的自製ozone scrubber以及原本市售ozone scrubber於高濃度O3及NO2環境下進行測試,流量在0.5、1、1.5 lpm之間作調整,並觀察在24小時內去除效率的變化。在O3實驗的部分,三者在各個流量皆顯示大於99%的去除效率。在NO2實驗裡,銅管於各流量皆仍有98%以上的去除效率;自製ozone scrubber於0.5 lpm有94%而1.5 lpm則為86%;市售ozone scrubber於0.5 lpm為37%而1.5 lpm為13%。在去除過程中,O3及NO2仍有些微互相影響。由各個scrubber的停留時間進行比較,去除效率皆最佳的銅管為2.2秒,單個市售ozone scrubber為0.024秒,自製ozone scrubber為0.22秒。若是將市售ozone scrubber串聯十個使碘化鉀使用量相等,則其去除效率略佳於自製ozone scrubber。
將其使用於室外醛酮採樣,並主要針對甲醛及乙醛,結果顯示,在長時間採樣中,沒有裝設scrubber的組別嚴重受到O3及NO2干擾影響。甲醛的結果皆為99%以上的收集效率,且三者scrubber採集到的濃度皆接近。乙醛的收集效率則較不穩定,目前原因為未知。雖然市售及自製ozone scrubber仍有少部分干擾物波峰出現,但是並無明顯影響採樣結果的濃度,與銅管採樣濃度仍接近。
英文摘要 This study is to find out the cause of clogging problem for commercial ozone scrubber, and to evaluate another kind of scrubbers with high O3 and NO2 removal efficiencies. Heating is used to prevent the clogging caused by the deliquescence of KI. The KI-coated copper tubing, a self-made ozone scrubber filled with KI powder, and commercial ozone scrubber were all evaluated at high concentration of O3 and NO2. For the O3 removal efficiency, all three scrubber are more than 99% after 24 hours in each different flow rates. For the NO2 removal efficiency, all scrubber show that removal efficiency decreases as flow rate increases. The results of sampling in the ambient air show that collection efficiency of formaldehyde is more than 99%, and the concentrations are similar to each other; the results of acetaldehyde sometimes show negative collection efficiency, especially at high flow rate and further study is needed for the cause.
論文目次 目錄
摘要………………………………………………………… I
致謝…………………………………………………………… V
目錄………………………………………………………… VII
表目錄………………………………………………………… IX
圖目錄………………………………………… X
第1章前言……………………………………………… 1
1.1 研究緣起 1
1.2 研究目的 2
第2章 文獻回顧 3
2.1 醛酮類化合物 3
2.1.1 醛酮類化合物特性 3
2.1.2 醛酮類化合物反應途徑 4
2.1.3 醛酮類化合物健康危害 7
2.2 醛酮類化合物採樣分析方法 10
2.2.1 氣體衝擊瓶(Impinger) 10
2.2.2 固相吸附管(Cartridge) 11
2.3 醛酮類化合物採樣干擾 15
2.3.1 臭氧 15
2.3.2 二氧化氮 22
2.3.3 相對濕度 25
2.3.4 一氧化碳 29
2.3.5 其他採樣因素 30
第3章 實驗方法 35
3.1 研究架構 35
3.2 堵塞原因解析 36
3.3 連續採樣實驗 37
3.3.1 避免潮解的方法 37
3.3.2 挑選Ozone Scrubber 41
3.3.3 連續採樣實驗設計 42
3.4 O3及NO2去除效率實驗 47
3.4.1 O3去除效率實驗 47
3.4.2 NO2去除效率實驗 49
3.4.3 混合O3及NO2去除效率實驗 51
3.5 室外醛酮採樣 52
3.5.1 採樣方法 52
3.5.2 分析方法 56
第4章 結果與討論 59
4.1 堵塞原因解析結果 59
4.2 連續採樣實驗結果 63
4.3 O3及NO2去除效率實驗結果 64
4.3.1 O3去除效率 64
4.3.2 NO2去除效率 67
4.3.3 混合O3及NO2去除效率實驗 74
4.3.4 Scrubber比較 77
4.3.5 吸附容量 78
4.4 室外醛酮採樣結果 80
4.4.1 相同流量不同scrubber採樣 80
4.4.2 不同流量相同scrubber採樣 84
第5章 結論與建議 89
5.1 結論 89
5.2 建議 90
參考文獻………………………………………………………. 91
附錄A 環境採樣因子 97
附錄B 層析詳細資料 101

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國家衛生研究院,國家環境毒物研究中心,http://nehrc.nhri.org.tw/toxic/
行政院環保署,環境檢驗所,https://www.epa.gov.tw/niea/A048BA729D1F7D58
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