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頁籤選單縮合
題 名 | 大鵬灣風景特定區大氣中氣膠之特徵=Characterization of Aerosols in the Ambient Air of Tapong Lagoon Area |
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作 者 | 李崇垓; 許慶聞; 仲崇毅; 張詒恩; 葉耀仁; 王瑞雲; | 書刊名 | 大仁學報 |
卷 期 | 24 2003.12[民92.12] |
頁 次 | 頁35-48 |
分類號 | 445.981 |
關鍵詞 | 懸浮微粒; 粒徑分階採樣; 加強因子分析; Aerosol particles; PM[fede]; Cascade impactor; Enrichment factor analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究選擇東港大鵬灣風景特定區為研究對象,主要目的為探討大氣懸浮微粒之區域特性以及嘗試解析其中所含各種化學成分之污染來源。首先,以6-stage之粒徑分階採樣頭連結於高量彩樣器進行大氣懸浮微粒現場採樣,再將採樣濾紙帶回實驗室進行一系列之化學分析,最後以統計分析方法進行數據之解析。由實驗分析結果得知,大鵬灣氣膠之粒徑分布特性以細微粒所佔比率較高,其絕大部分來自於人為污染源,而且屬於所謂吸入性微粒(PM₃)之範圍。就健康風險評估角度而言,此粒徑大小之微粒對人體危害較大顆粒微粒嚴重許多,其影響甚鉅,絕不可忽視。大鵬灣氣膠中所含化學成分以SO₄²¯所佔比率為最高,而氣膠中之水溶性離子經由加強因子計算結果得知:Cl¯與Mg²[90a7]絕大部分來自於海水飛沫;而K+並非完全來自於海水飛沫,其他人為排放源(例如道路揚塵及農廢燃燒等)也有所貢獻;再者,SO₄²¯與Ca²[90a7]則大部分分別來自於石化燃燒與道路揚塵等其他人為污染源所貢獻,來自於海鹽之比例相當低。就金屬成份而言,絕大部分均分佈在粗微粒(PM₃□)中,Fe為大鵬灣懸浮微粒中含量最多之金屬成份,其次為Cu、Cr及Ni等三種金屬成份。較可能之污染源包括鋼鐵廠以及與重油燃燒相關之工業製程;而逸散性之土壤揚塵以及交通污染源之貢獻亦不容忽視。 |
英文摘要 | This study investigated the source apportionment of ambient particulate matters in Tapong Lagoon area, which is going to be the national recreation area in southern Taiwan. One intensive field monitoring of aerosol particles was conducted from the end of March to the beginning of April of 2002. Ambient particulate matter was sampled by a high volume PM[fede] sampler with a 6-stage cascade impactor inlet head, which enabled the collection of suspended particulate matter representative of 6 different fractions (particle size range within 7.2~10, 3~7.2, 1.5~3, 0.95~1.5、0.45~0.95, and <0.45 µm, respectively). The filter samples were then analyzed for various metallic constituents and water-soluble ions including major anions (Cl¯, SO₄²¯, and NO₃¯) and cations (NH₄[90a7], K, Na[90a7], Ca[90a7]², and Mg[90a7]²). Furthermore, a statistic analyzing method named Enrichment Factor Analysis was employed to identify potential emission sources of aerosol particles in Tapong Lagoon area. The aerosol size distribution results revealed that the fine aerosol fraction (PM₃), associated closely to human health problems, dominant the mass concentrations of PM[fede] in Tapong Lagoon area. The ratios of PM₃to PM[fede] larger than 0.85 for all samples also provide the same information. Results from Enrichment Factor Analysis indicated that Cl¯ and Mg[90a7]² were mostly come from sea salt aerosols, while the marine aerosol contributions to K[90a7] were substantially low. SO₄²¯ and Ca²[90a7] were found to correspond closely to the anthropogenic sources such as petroleum fuel burning and fugitive road dust, respectively, rather than the nature source of the marine aerosols. The most abundant metallic species in Tapong Lagoon aerosols was Fe, mostly in the coarser fraction (PM₃□). In addition, the concentrations of Cu, Cr, and Ni in coarse particles were also much higher than those in fine particles. The corresponding potential emission sources of these metallic species were steel related and petroleum plants, motor vehicle exhaust, and fugitive road dust, respectively. |
本系統中英文摘要資訊取自各篇刊載內容。