二氧化氯在甲醛與生物氣膠的消除研究

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Title:	二氧化氯在甲醛與生物氣膠的消除研究 Elimination of Bioaerosols and Formaldehyde by Chlorine Dioxide 近年來國內接連爆發流感、麻疹與腸病毒等疫情，尤其又以 2019年的冠狀病毒(COVID-19)引發群聚感染最為嚴重，研究顯示流感病毒微粒可長時間懸浮於空氣中，引發人員感染，另外室內空氣品質(Indoor Air Quality)管制標準中的甲醛(Formaldehyde)污染亦糾紛頻傳，常見於裝潢與各類型傢俱中，成為室內化學污染首要之惡，突顯生物氣膠及甲醛控制風險的重要性，因此，本研究將以美國環保署(Environmental Protection Agency)公告之滅菌劑-「二氧化氯」做為主要滅菌劑並進行一系列降解實測。本研究將市面上購買的測試片，放入其中予以密閉，以「70％酒精」、「0.5%漂白水」、「0.05％次氯酸水」、「3％過氧化氫溶液」、「EP606二氧化氯燻蒸瓶」五種消毒劑並採燻蒸方式實施除污，以 ATP 檢測儀進行八週的樣品監測，實驗及結果顯示二氧化氯和酒精在密封八週後的除污效能皆能有效抑制菌落的生長，二氧化氯與次氯酸水、過氧化氫、漂白水三者比較後顯示，後三者菌落數與二氧化氯菌落數相差了 30 倍以上。後續以 200ppm±10 甲醛液體噴入密封箱中，分別使用噴霧法及燻蒸法進行甲醛降解實驗，研究結果顯示密閉箱內之甲醛初始濃度達0.13ppm，經過噴霧法及燻蒸法除汙之後，皆能將甲醛降解至 0ppm，分解率達 100%，接著以二氧化氯燻蒸瓶置入密閉箱中，甲醛初始濃度從 0.23ppm 經過 120 分鐘後降解為 0.01ppm。而二氧化氯燻蒸法應用在培養皿上，在總菌落數消除率為71%；真菌數消除率為84%，而噴霧法在總菌落數消除率為96%；真菌數消除率為86%，並以MC-Media Pad金黃色葡萄球菌及黴菌培養片，準備「0.05%二氧化氯溶液」，依據環保署環境衛生用殺菌劑藥效測定法，進行消毒後，亦顯示二氧化氯在面對微生物的除汙皆有良好的殺菌效能，另外在測量將二氧化氯燻蒸瓶開啟後，等待空間內之二氧化氯濃度達0.11ppm±0.01，經過25分鐘之後完全降解至0ppm，推算出半衰期為10分鐘，本研究確認EP606二氧化氯不僅提升空氣品質並且減少污染，亦有易分解不危害環境及人體之特性。 In recent years, there have been successive outbreaks of influenza andoutbreaks of measles and enterovirus in Taiwan. The studies for most serious infection caused by coronavirus (COVID-19) in 2019 showed that influenza virus particles can be suspended in the air for a long time, causing personnel infection. In addition, formaldehyde pollution in indoor air always occurs in decoration and various types of furniture. Therefore, it is very important in controlling bio-aerosol and formaldehyde for enhancing the indoor air quality. This study mainly used the disinfectant, chlorine dioxide, announced by the US environmental protection agency for a series of evaluation. Other disinfectants were applied for comparison.The test pieces purchased from the market were put into five boxes with 70% of alcohol, 0.5% of bleach, 0.05% of hypochlorous acid water, 3% of hydrogen peroxide, chlorine dioxide fumigation bottle, respectively.The ATP test was applied to evaluate the disinfection efficiency after 8 weeks. Results showed that all disinfectants can control the bacterial growth efficiently and the disinfection efficiency of chlorine dioxide is 30 times higher than other disinfectants.For the formaldehyde experiment, 200?10 ppm of formaldehyde liquid was put into the sealed box with the spray methods. The initial concentration of formaldehyde in the space of the closed box was 0.13 ppm, and then it turned to be undetectable after adding chlorine dioxide with the spray method and 0.23 ppm with the fumigation method after 120 min. The disinfection efficiencies by the fumigation method using chlorine dioxidefor total bacteria and fungus were 71% and 84%, respectively and those by spray were 96 % and 86 %, respectively. The solution containing 0.05% of chlorine dioxide was used to evaluate its disinfection efficiency with MC-Media Pad Staphylococcus aureus and mold culture pieces based on the Environmental Protection Agency's Environmental Hygiene Fungicide Efficacy Determination Method. It also showed that chlorine dioxide has good sterilization effect in the face of microorganism decontamination.The concentration of chlorine dioxide in the closed box was 0.11?0.01 ppm and that turned to be non-detectable after 25 min. It meant that the half-life of chlorine dioxide in this environment was around 10 min. Therefore, it can prove that chlorine dioxide has the characteristics of enhancing air quality, reducing contamination and harmless to theenvironment and human.
Authors:	吳士豪
Contributors:	環境資源管理系盧明俊
Keywords:	室內空氣品質甲醛生物氣膠二氧化氯消毒劑降解 indoor air quality formaldehyde bioaerosol chlorine dioxide disinfectant degradation
Date:	2020
Issue Date:	2022-10-21 10:29:20 (UTC+8)
Relation:	學年度：108， 113頁
Appears in Collections:	[Dept. of Environmental Resources Management] Dissertations and Theses

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