環境中空氣負離子產生方式之研究

The Study on Generation Method of Environmental Negative Air Ions

翁巧苓(Chiao-Ling Weng)

指導教授 ： 李慧梅

國立臺灣大學/工學院/環境工程學研究所/碩士(2005年)

https://doi.org/10.6342/NTU.2005.01907

摘要

根據許多研究報告指出空氣中存在的離子會對人體健康產生影響，在現代的生活環境中，空氣離子的濃度亦可直接反應出環境中空氣污染的程度。文獻中指出空氣負離子對人體健康具有正面效益。本研究進行都市區空氣離子的現地量測，包括室內與室外的噴水造景之正負離子濃度的分析，以建立相關的資料。另一方面，本研究利用霧化器以水滴破碎的機制來產生空氣負離子，探討各種操作因子與空氣中產生的負離子濃度之關係。

都市噴水造景地區之背景空氣離子濃度偵測地點一共有四處，包含台北縣政府大樓一樓、永和仁愛公園空地、遠企大樓後門、及信義路與松壽路交叉口，空氣負離子平均濃度為641 ~ 1,131 ions/cm3。其中在鄰近道路的環境中會因運輸交通等人為活動發達，空氣中正離子濃度比負離子濃度大，而空氣正負離子的濃度比值約為1.1。而在永和仁愛公園空地中，因為較少汽機車排放污染的干擾，環境中的負離子濃度比正離子濃度高出許多，空氣負離子濃度約為正離子的3.7倍，其空氣正負離子的濃度比值就僅有0.27。都市噴水造景取樣點包含台北縣政府大樓室內水幕、永和仁愛公園水幕、遠企大樓門口噴泉、及信義路與基隆路交口的噴水池，所產生的空氣負離子平均濃度在38,320 ~ 263,863 ions/cm3，其中以遠企大樓噴水池所量測到的空氣負離子濃度最為高。

實驗室架設霧化系統以模擬水滴破碎產生空氣負離子的機制，分別以二個霧化水源及三個不同壓力，依序在五個不同的距離位置進行量測。研究結果顯示，霧化水源愈純淨所產生的空氣負離子濃度愈高，純水霧化後的空氣負離子濃度約為自來水的3.4 ~ 16.4倍。當霧化壓力愈大時所產生的空氣負離子濃度愈高，例如霧化壓力30 PSI霧化時所產生的負離子濃度比霧化壓力20 PSI的高出約3.6 ~ 8.7倍。

關鍵字

空氣負離子 ； 噴水造景 ； 水滴破碎 ； 霧化

並列摘要

According to many research reports, the air ions in the atmosphere would affect the health of the human body. The concentration of air ions can reflect the degree of the air pollution directly in the present environment. The relative literatures indicate that the negative air ions (NAIs) have the positive effect on the human health. The in-situ monitor of air ion concentrations in the urban area is performed in this study. The concentrations of the positive and negative air ions in the fountain area are analyzed to obtain the relative information. On the other hand, the NAIs are generated from the mechanism of the breakup of water droplets by the lab atomizer in this study. The relationship between the concentration of NAIs and the operating condition is investigated.
There are four monitoring sites for the measurement of background air ions in the fountain-containing area, including the first floor of Taipei County Government building, the open space of Yungho Jen-AI park, the back door of Taipei Metro Mall, and the cross section of Song-Shou and Keelung Roads. The average concentration of NAIs in these background sites is between 641 and 1131 ions/cm3. The concentration of the positive air ions (PAIs) is greater than that of NAIs with the concentration ratio of PAIs/NAIs of 1.1 in the traffic region due to the heavy vehicle transportation and human activities. However, the concentration of NAIs is higher than that of PAIs in the open space of Yungho Jen-AI park due to less air pollution sources. The concentration of NAIs is about 3.7 times that of PAIs with the concentration ratio of PAIs/NAIs of 0.27. The four sampling points of the fountain scenes includes the indoor waterfall in the building of Taipei County Government, the outdoor waterfall in Yungho Jen-AI park, the fountain in front of Taipei Metro Mall, and the fountain near the cross section of Xinyi and Keelung Roads. The average concentration of NAIs around the fountain scenes is between 38,320 ~ 263,863 ions/cm3. Among all, the concentration of NAIs near the fountain in front of Taipei Metro Mall is highest.
The atomization system is employed to simulate the generation of NAIs by the breakup of water droplets in the laboratory. There are two atomized water sources and three different pressures. The results show that the concentration of NAIs is higher when the water source is clearer. The NAIs generated from the atomization of pure water is about 3.4 ~ 16.4 times that of tap water. The concentration of NAIs increases with the pressure of atomization. For example, the concentration of NAIs generated at the atomization pressure of 30 PSI is higher as 3.6 to 8.7 times that of 20 PSI.

並列關鍵字

Negative air ions ； fountain scene ； water droplet breakup ； atomization

參考文獻

顏麗凰，利用水滴破碎產生空氣負離子之研究，碩士論文，台灣大學環境工程學研究所，2004.

朱明若、李姣姿，全球化之下工作壓力對職工身心健康之影響及整合性的對策，台灣公共衛生雜誌，20(6)，p.p. 413-422，2001

Kornblued, I. H., Piersol, G. M. and Speicher, F. P., Relief form Pollinosis in Negatively Ionised Rooms. American Journal of Physiology Medicine, vol. 37, p.p.18-27, 1958.

Air Ion Counter

Centers for Disease Control and Prevention