中國醫藥大學機構典藏 China Medical University Repository, Taiwan:Item 310903500/611
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    題名: 中部科學園區台中基地周界空氣中無機酸鹼濃度分佈之調查
    作者: 林宥辰;Yo -Chen Lin
    貢獻者: 中國醫藥大學：環境醫學研究所
    application/pdf
    thesis
    關鍵詞: 中部科學園區;無機酸;背景值;CTSP;airborne inorganic acid;background concentrations
    日期: 2008-06-26
    上傳時間: 2009-08-11 16:56:18 (UTC+8)
    摘要: 中文摘要
    　　目的：探討中部科學園區(以下簡稱“中科”)台中基地大氣中無機酸鹼濃度之分佈狀況，建立中科台中基地大氣中無機酸鹼周界濃度之背景資料。
    方法：中科廠商於2005年6月開始生產，本研究依據ISC3進行等濃度分佈測試，選定10個無機酸鹼採樣點及一個氣象資料之收集點，並且以離子層析分析儀進行定量之分析。依據中科操作許可措施，2006年2月前未許可任何硫酸及鹽酸之排放，故本研究所有硫酸及鹽酸之檢測資料可作為其背景值，其他無機酸鹼如氫氟酸、硝酸及氨氣，因2005年6月中科廠商開始獲得操作許可而可進行排放，故只能以許可排放前(2005年3-6月)所採樣分析所得之數據作為其背景濃度值。
    結果：
    1. 硫酸全年(2005年3至2006年2月)平均濃度為10.95　μg/m3、硫酸鹽(SO42-)為　5.50　μg/m3、鹽酸為　1.65 ppb(園區無排放)、氯鹽(Cl-)為　0.78 ppb。可視為其背景值。
    2. 其他無機酸：硝酸於本研究前三個月(2005年3-5月)之平均濃度為0.78 ppb、硝酸鹽(NO3-)為4.11 ppb、氨氣體為15.30 ppb、銨鹽(NH4+)為3.46 ppb、氫氟酸為0.64 μg/m3、氟鹽(F-)為0.52 μg/m3、總氟化物為1.16 μg/m3。亦可視為其背景值。
    3. 除氫氟酸外，其他無機酸鹼濃度在許可排放後平均濃度及全年度平均濃度無顯著差異。氫氟酸濃度則在許可排放前後(2005年6月前後)增加將近一倍(由0.64 μg/m3增加至1.21 μg/m3)。而所有無機酸鹼濃度皆小於周界標準值。
    4. 所有物種濃度分佈皆為右偏。硝酸、硝酸鹽、氯鹽、氨氣與氨鹽濃度分佈呈現對數常態分佈。其餘物種分佈情形則非常態分佈也非對數常態分佈。了解這些分佈是何種型式有助於統計分析檢定的進行。
    5. 空氣中溼度增加會使鹽酸、氫氟酸、氟鹽、總氟化物濃度上升；氣溫上升則會降低氯鹽濃度，增加硫酸鹽的濃度；風速降低時大部分無機酸鹼物種濃度上升。
    結論：除氫氟酸外，大部分無機酸濃度在許可排放後無顯著差異，氫氟酸濃度則顯著增加。分析各採樣站所收集到的物種間相關係數與相對位置分佈的情形，可當作調查排放源位置的有效方法。

    ABSTRACT
    Objectives：The aims of this study were to investigate the background concentrations of airborne inorganic acid and basic species in the vicinity of Central Taiwan Science Park（CTSP）and to clarify how the emissions from the industries of the park and meteorological condition affect the concentrations.
    Method：Factories in the CTSP started to operate in June 2005. This study was conducted using ISC3 model. Ten sampling stations were established for collecting air samples for laboratory analysis and monitoring meteorological data from March 2005 to February 2006. Samples were subject to quantitative analysed using the ion chromatograpy. The emission of sulfuric acid and hydrochloric acid in the park was not permitted until February 2006. The emission of other inorganic acid such as nitric acid and hydrofluoric acid, and ammonia in the park started June 2005.
    Results：
    1. The average background concentration of sulfuric acid gas for the year was 10.95μg/m3, with 5.50 μg/m3 as sulfate (SO42-) (No emission in the park). The corresponding concentrations were 10.95 ppb of HCl gas and 1.12 ppb of the chlorate (Cl-) in the same year.
    2. The average concentrations for other ingorganic acids measured in the first three months in this study were 0.78 ppb HNO3/HNO2 , 4.11 ppb nitrate (NO3-),15.30ppb NH3 gas,3.46ppb ammonium (NH4+), 0.64μg/m3 HF gas, 0.52μg/m3 fluoride (F-) and 1.16μg/m3 total fluoride.
    3. There were no significant differences for most pollutants between the background values and concentrations measured in the emission permitted period, except hydrofluoric acid. The hydrofluoric acid concentraction was doubled during the emission period（from 0.64μg/m3 to 1.21μg/m3）. However, the average concentrations of all species did not exceed the permitted discharge levels.
    4. The distributions of all species skewed to the right. The distributions of nitric acid gas, sulfate, chlorate, amonia and ammonium concentrations were logistic normal.
    5. We also found that the increased humidy was associated with increased concentrations of hydrochloric acid gas, hydrofluoric acid gas, fluorate and the total fluoride. Higher temperature was associated with reduced chlorate concentration and increased sulfate concentration. The concentrations of all species increased as the wind speed decreased.
    Conclusions：Hydrofluoric acid is the only substance measured in the samples with the concentration significantly higher than the background value. There are no significant differences between the background levels and the measured levels of all other pollutants while the industries in the park were in operation.
    顯示於類別:[環境醫學研究所(已停用)] 博碩士論文

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