不同地區PAHs之組成、氣固態分佈之差異探討

Study on the differences of compositions and gas/particle partitions for polycyclic aromatic hydrocarbons in different regions

王學雯(Hsueh-Wen Wang)

指導教授 ： 郭崇義 ； 盧啟元

中山醫學大學/健康管理學院/公共衛生學系碩士班/碩士(2018年)

摘要

本研究主旨為探討不同地區多環芳香烴碳氫化合物(Polycyclic Aromatic Hydrocarbons, PAHs)在組成和大氣中氣/固態分布之差異。選擇沿海地區、雲林內陸地區及台中內陸地區，收集103-106期間之氣態/固態樣品，採樣後之樣品分析利用GC/MS分析29種PAHs。比較不同地區、日夜、季節及天氣型態等其PAHs之組成、特徵比值、氣/固態分布、老化程度等參數之差異。
在組成分布差異發現三個地區都有受到柴油車引擎排放之影響，而沿海地區在秋、冬季亦受到工業排放之影響。在特徵比值上，沿海地區之固態PAHs以工業煙囪排放為主；雲林內陸地區和台中內陸地區固態PAHs之排放來源則為煤炭燃燒和石油揮發來源。PAHs氣/固態平衡係使用logKP-logPL0 和logKP-logKoa兩種模式探討，台中內陸地區在其氣/固態分布較其他兩地區更趨近於平衡。在季節比較上，沿海地區和雲林內陸地區則在春季其PAHs氣/固態分布較其他季節更趨近於平衡。在不同地區之老化程度之比較上，發現台中內陸地區其氣膠老化程度較其他地區更明顯。

關鍵字

多環芳香烴碳氫化合物 ； 特徵比值 ； 組成分布 ； 氣/固分佈係 ； 老化程度

並列摘要

The purpose of this study is to investigate the differences in compositions and gas/particle partitioning for polycyclic aromatic hydrocarbons (PAHs) in three different regions. During the period of 2014 to 2017, samples (gas phase and total suspended particles) were collected from coastal areas in Yunlin county, inland areas of Yunlin county, and inland areas of Taichung city. Twenty-nine PAHs from samples were analyzed by gas chromatography coupled with mass spectrometry (GC/MS). The differences in compositions, characterisitic ratios, gas/particle portioning coefficients, and the aging degree of PAHs between day and night, as well as the different seasons in three different regions, were discussed.
The results of PAH compositions show that all three regions were affected by diesel engine emissions, while coastal areas in Yunlin county in autumn and winter were further affected by industrial combustion. The results of characterisitic ratios show that the PAH contribution sources were mainly from industrial combustion in coastal sites of Yunlin county, while the sources were from coal combustion and volatilization of petroleum hydrocarbons in inland sites of Yunlin county and Taichung city.
The logKP-logPLo and logKp-logKoa models were used to discuss the equilibrium status of gas-particle partitioning of PAHs in three different regions. The distributions of gas-particle partitions in inland areas of Taichung city were closer to the equilibrium status than the other two regions. However, compared to other seasons, the distributions of gas-particle partitions in coastal areas and inland areas of Yunlin county was closer to the equilibrium status of spring. The results of the aging indices in three different regions show that the degree of aging for aerosols in the inland areas of Taichung city became more obvious than the other two regions.

並列關鍵字

Polycyclic aromatic hydrocarbons ； Diagnostic ratios ； Gas-particle partitions ； ageing

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