大氣中細懸浮微粒化學組成及來源貢獻分析研究

Investigation of Atmospheric PM2.5 Chemical Composition and Source Contribution

江瑋哲(Wei-Zhe Jiang)

指導教授 ： 楊錫賢

朝陽科技大學/理工學院/環境工程與管理系/碩士(2013年)

摘要

本研究於100年7月至102年6月進行桃園地區不同季節大氣中細懸浮微粒採樣，將採集之樣品進行金屬元素與水溶性離子分析，並應用正矩陣因子分析與污染源的相關性，最後以化學質量平衡法做來源貢獻分析，推估各種污染源對受體點貢獻量。研究結果顯示，桃園地區於冬季與春季期間測得之細懸浮微粒質量濃度高於夏季與秋季。在化學組成方面，大氣微粒中之金屬元素以Al、Ca、Fe、K、Mg與Na所含濃度最高。水溶性離子佔細微粒比例多寡最高為SO42-，其次為NH4+，而後為NO3-。在應用正矩陣因子法分析進行大氣各測點採樣分析結果顯示污染源共分為5個因子，因子1至因子5分別之污染源定義為地殼物質、焚化燃燒、海鹽飛沫、交通排放、街道揚塵及二次氣膠。應用化學質量平衡法模式解析桃園地區季節性PM2.5貢獻污染源，該地區PM2.5貢獻污染源以硫酸鹽貢獻量為最大，其次為機動車輛，而後為街道揚塵。

關鍵字

化學質量平衡法 ； 正矩陣因子法 ； 水溶性離子 ； 金屬元素 ； 細懸浮微粒

並列摘要

In this study, atmospheric fine particulates were collected in Taoyuan area for different seasons from July, 2012 to June, 2013. The collected filter samples were analyzed for metals and water-soluble ions. Positive matrix factorization analysis and chemical mass balance model are applied for source contribution estimates. The results show that the level of fine particulate is higher in winter and spring than summer and autumn periods. For metal elements, the concentrations of Al, Ca, Fe, K, Mg and Na are much higher than other metals. For water-soluable ions, SO42-, has highest concentration, followed by NH4+ and NO3-. The results of the positive matrix factorization analysis show that there are five factors. The five factors are idenfified as crust, incineration, sea salt spray, transport emissions, street dust and secondary aerosol. The results of chemical mass balance method show that the contributors of PM2.5 are sulfate, followed by motor vehicles and street dust.

並列關鍵字

positive matrix factorization method ； chemical mass balance method ； water-soluble ions ； metals ； Fine particles

參考文獻

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