高科技工業園區周界環境空氣中酸性氣膠之探討

Abstract

本研究為了瞭解科學園區之酸性氣膠的污染現況。利用多孔性金屬固氣分離器在園區周界十三個地點進行採樣，檢測園區周界酸鹼性氣膠的濃度，且以風向、風速等氣象條件探討無機酸鹼污染狀況；另外以擴散模式ISCST3進行模擬，比較與採樣當天監測結果的差異性。截至89年9月~90年3月監測結果發現，大部份的酸鹼氣體的濃度低於法規的周界標準值。但是在9月、10月的監測中，總氟化物的最高濃度分別為12.5µg/m3、11.3µg/m3，已超過法規周界標準的10µg/m3。而總氟化物的來源主要為氫氟酸，佔總氟化物55%以上。 將採樣結果經由ISCST3模擬酸鹼氣膠於園區周界分佈情形做比對，發現於強風盛行時的模擬濃度分布趨勢比低風速時佳，但模擬的濃度值則低於實測值的1-95倍。 而本實驗使用多孔金屬固氣分離器及蜂巢管固氣分離器兩種不同的採樣器，做酸鹼氣膠採樣結果比較，發現二者對微粒、氣體採樣結果的相關係數均大於0.94、p值均大於0.05，顯示二種採樣器在大氣環境中對於酸鹼氣膠採樣，採樣結果差異不大。

In this paper, 13 porous metal denuders with was located at certain spots surrounding Science-Based Industrial Park (SBIP) to find the pollution situation of acidic aerosol around SBIP. Besides, a new atmospheric dispersion model ISCST3 was also used to predict the concentrations of acidic aerosol around SBIP as well as compare with the concentrations of denuders. The calculation of ISCST3 model is based on the emission information of manufactures, wind direction, wind velocity and temperature. From September 2000 to March 2001, most of the data of species concentrations were shown lower than the values of the related regulations of Taiwan except the concentration of 12.5μg/m3 and 11.3μg/m3 of total fluoride which was 10μg/m3 higher than the values of the related regulations of Taiwan. The main source of total fluoride is HF(g), which takes over 55% in total fluoride. Comparing the concentrations of denuders with these calculated by ISCST3 model, the calculated results of ISCST3 model were found more similar to the concentration data of denuders as wind velocity is high, however the similarity decreases as wind velocity decreases as well. The simulation results were about 1 to 95 times less than the concentration values of denuders. Two honeycomb denuders (HDS) and thirteen porous metal denuders were used in this study. It was found that the R2 value and p-value between HDS and denuder were higher than 0.94 and 0.05, respectively, which shows a good agreement.