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標題: 大氣細懸浮微粒的化學組成及其硝酸鹽量測之探討
Study on the chemical compositions of ambient fine particulates and the measurements of nitrate constituent
作者: 劉玲君
Liu, Ling-Chun
關鍵字: denuder;環形擴散採樣器;PM2.5;nitrate;volatile;細懸浮微粒;硝酸鹽;揮發
出版社: 環境工程學系所
引用: Abu-Allaban, M., A. W. Gertler and D. H. Lowenthal, "A Preliminary Apportionment of the Sources of Ambient PM10, PM2.5, and VOCs in Cairo," Atmospheric Environment, Vol. 36, pp. 5549-5557 (2002). Allegrini, I., F. D. Santis, V. D. Palo, A. Febo, C. Perrino and M. Possanzini, "Annular Denuder Method for Sampling Reactive Gases and Aerosols in the Atmosphere, " Science of the Total Environment, Vol. 67, pp. 1-16 (1987). Ammann, M., M. Kalberer, D. T. Jost, L. Tobler, E. Rossler, D. Piguet, H. W. Gaggeler and U. Baltensperger, "Heterogeneous Production of Nitrous Acid on Soot in Polluted Air Masses," Nature, Vol. 395, pp. 157-160 (1998). Appel, B. R., Y. Tokiwa and M. Haik, "Sampling of Nitrates in Ambient Air," Atmospheric Environment (1967), Vol. 15, pp. 283-289 (1981). Ashbaugh, L. L. and R. A. Eldred, "Loss of Particle Nitrate from Teflon Sampling Filters: Effects on Measured Gravimetric Mass in California and in the IMPROVE Network," Journal of the Air & Waste Management Association, Vol. 54, pp. 93-104 (2004). Aumont, B., F. Chervier and S. Laval, "Contribution of HONO Sources to the NOx/HOx/O3 Chemistry in the Polluted Boundary Layer," Atmospheric Environment, Vol. 37, pp. 487-498 (2003). Babich, P., M. Davey, G. Allen and P. Koutrakis, "Method Comparisons for Particulate Nitrate, Elemental Carbon, and PM2.5 Mass in Seven U.S. Cities.," Journal of the Air & Waste Management Association, Vol. 50, pp. 1095-1105 (2000). Bergin, M. H., G. R. Cass, J. Xu, C. Fang, L. M. Zeng, T. Yu, L. G. Salmon, C. S. Kiang, X. Y. Tang, Y. H. Zhang and W. L. Chameides, "Aerosol Radiative, Physical, and Chemical Properties in Beijing during June 1999," Journal of Geophysical Research, Vol. 106, pp. 17969-17980 (2001). Biswas, K. F., B. M. Ghauri and L. Husain, "Gaseous and Aerosol Pollutants during Fog and Clear Episodes in South Asian Urban Atmosphere," Atmospheric Environment, Vol. 42, pp. 7775-7785 (2008). Bourotte, C., A. P. Curi-Amarante, M. C. Forti, L. A. A. Pereira, A. L. Braga and P. A. Lotufo, "Association between ionic composition of fine and coarse aerosol soluble fraction and peak expiratory flow of asthmatic patients in São Paulo city (Brazil)," Atmospheric Environment, Vol. 41, pp. 2036-2048 (2007). Calvert, J. G. and W. R. Stockwell, "Acid Generation in theTroposphere by Gas-Phase Chemistry," Environmental Science & Technology, Vol. 17, pp. 428A-443A (1983). Castanho, A. D. A. and P. Artaxo, "Wintertime and Summertime São Paulo Aerosol Source Apportionment Study," Atmospheric Environment, Vol. 35, pp. 4889-4902 (2001). Chan, C. C., K. J. Chuang, W. J. Chen, W. T. Chang, C. T. Lee and C. M. Peng, "Increasing Cardiopulmonary Emergency Visits by Long-Range Transported Asian Dust Storms in Taiwan," Environmental Research, Vol. 106, pp. 393-400 (2008). Chan, W. H., R. J. Nordstrom, J. G. Calvert and J. H. Shaw, "Kinetic Study of Nitrous Acid Formation and Decay Reactions in Gaseous Mixtures of Nitrous Acid, Nitrogen Oxide (NO), Nitrogen Oxide (NO2), Water, and Nitrogen," Environmental Science & Technology, Vol. 10, pp. 674-682 (1976). Chang, L. T., J. H. Tsai, J. M. Lin, Y. S. Huang and H. L. Chiang, "Particulate Matter and Gaseous Pollutants during a Tropical Storm and Air Pollution Episode in Southern Taiwan," Atmospheric Research, Vol. 99, pp. 67-79 (2011). Chang, S. Y., C. T. Lee, C. Chou, S. C. Liu and T. X. Wen, "The Continuous Field Measurements of Soluble Aerosol Compositions at the Taipei Aerosol Supersite, Taiwan," Atmospheric Environment, Vol. 41, pp. 1936-1949 (2007). Chen, S. J., L. T. Hsieh, C. C. Tsai and G. C. Fang, "Characterization of Atmospheric PM10 and Related Chemical Species in Southern Taiwan during the Episode Days," Chemosphere, Vol. 53, pp. 29-41 (2003). Chen, S. J., L. T. Hsieh, M. J. Kao, W. Y. Lin, K. L. Huang and C. C. Lin, "Characteristics of Particles Sampled in Southern Taiwan during the Asian Dust Storm Periods in 2000 and 2001," Atmospheric Environment, Vol. 38, pp. 5925-5934 (2004). Cheng, M. T., C. L. Horng, Y. R. Su, L. K. Lin, Y. C. Lin and C. Chou, "Particulate Matter Characteristics during Agricultural Waste Burning in Taichung City, Taiwan," Journal of Hazardous Materials, Vol. 165, pp. 187-192 (2009). Cheng, M. T., W. C. Chou, C. P. Chio, S. C. Hsu, Y. R. Su, P. H. Kuo, B. J. Tsuang, S. H. Lin and C. Chou, "Compositions and Source Apportionments of Atmospheric Aerosol During Asian Dust Storm and Local Pollution in Central Taiwan," Journal of Atmospheric Chemistry, Vol. 61, pp. 155-173 (2008). Cheng, W. L., "Ozone Distribution in Coastal Central Taiwan under Sea-Breeze Conditions, " Atmospheric Environment, Vol. 36, pp. 3445-3459 (2002). Chiwa, M., "Characteristics of Atmospheric Nitrogen and Sulfur Containing Compounds in an Inland Suburban-Forested Site in Northern Kyushu, Western Japan," Atmospheric Research, Vol. 96, pp. 531-543 (2010). Chou, C., C. Y. Lin, T. K. Chen, S. C. Hsu, S. C. Lung, S. C. Liu and C. Y. Young, "Influence of Long-Range Transport Dust Particles on Local Air Quality: A Case Study on Asian Dust Episodes in Taipei during the Spring of 2002," Terrestrial Atmospheric Oceanic Sciences, Vol. 15, pp. 881-889 (2004). Chou, C., C. T. Lee, C. S. Yuan, W. C. Hsu, C. Y. Lin, S. C. Hsu and S. C. Liu, "Implications of the Chemical Transformation of Asian Outflow Aerosols for the Long-Range Transport of Inorganic Nitrogen Species," Atmospheric Environment, Vol. 42, pp. 7508-7519 (2008). Chow, J. C., J. G. Watson, D.H. Lowenthal and K. L. Maqliano, "Loss of PM2.5 Nitrate from Filter Samples in Central California," Journal of the Air & Waste Management Association, Vol. 55, pp. 1158-1168 (2005). Eftim, S. E., J. M. Samet, H. Janes, A. McDermott and F. Dominici, "Fine Particulate Matter and Mortality: A Comparison of the Six Cities and American Cancer Society Cohorts with a Medicare Cohort," Epidemiology, Vol. 19, pp. 209-216 (2008). Eldering, A., P. A. Solomon, L. G. Salmon, T. Fall and G. R. Cass, "Hydrochloric Acid: A Regional Perspective on Concentrations and Formation in the Atmosphere of Southern California," Atmospheric Environment. Part A. General Topics, Vol. 25, pp. 2091-2102 (1991). Fang, G. C., C. N. Chang, Y. S. Wu, N. P. Wang, V. Wang, P. Fu, D. G. Yang and S. C. Chen, "Comparison of Particulate Mass, Chemical Species for Urban, Suburban and Rural Areas in Central Taiwan, Taichung," Chemosphere, Vol. 41, pp. 1349-1359 (2000). Feichter, J., E. Kjellström, H. Rodhe, F. Dentener, J. Lelieveldi and G. J. Roelofs, "Simulation of the Tropospheric Sulfur Cycle in a Global Climate Model," Atmospheric Environment, Vol. 30, pp. 1693-1707 (1996). Franklin, M., A. Zeka and J. Schwartz, "Association between PM2.5 and All-Cause and Specific-Cause Mortality in 27 US Communities," Journal of Exposure Science and Environmental Epidemiology, Vol. 17, pp. 279-287 (2007). Franklin, M., P. Koutrakis and J. Schwartz, "The Role of Particle Composition on the Association between PM2.5 and Mortality," Epidemiology, Vol. 19, pp. 680-689 (2008). Glavas, S. D., P. Nikolakis, D. Ambatzoglou and N. Mihalopoulos, "Factors Affecting the Seasonal Variation of Mass and Ionic Composition of PM2.5 at a Central Mediterranean Coastal Site," Atmospheric Environment, Vol. 42, pp. 5365-5373 (2008). Harrison, R. M. and A. G. Allen, "Measurements of Atmospheric HNO3, HCl and Associated Species on a Small Network in Eastern England," Atmospheric Environment. Part A. General Topics, Vol. 24, pp. 369-376 (1990). Harrison, R. M., J. D. Peak and G. M. Collins, "Tropospheric Cycle of Nitrous Acid," Journal of Geophysical Research, Vol. 101, pp. 14429-14439 (1996). Hering, S. V. and G. R. Cass, "The Magnitude of Bias in the Measurement of PM2.5 Arising From Volatilization of Particulate Nitrate From Teflon Filters," Journal of the Air & Waste Management Association, Vol. 49, pp. 725-733 (1999). Hien, P. D., V. T. Bac and N. T. H. Thinh, "PMF Receptor Modelling of Fine and Coarse PM10 in Air Masses Governing Monsoon Conditions in Hanoi, Northern Vietnam," Atmospheric Environment, Vol. 38, pp. 189-201 (2004). Hong, Y. M., B. K. Lee, K. J. Park, M. H. Kang, Y. R. Jung, D. S. Lee and M. G. Kim, "Atmospheric Nitrogen and Sulfur Containing Compounds for Three Sites of South Korea," Atmospheric Environment, Vol. 36, pp. 3485-3494 (2002). Horng, C. L. and M. T. Cheng, "Distribution of PM2.5, Acidic and Basic Gases Near Highway in Central Taiwan," Atmospheric Research, Vol. 88, pp. 1-12 (2008). Hsieh, L. Y., S. C. Kuo, C. L. Chen and Y. I. Tsai, "Size Distributions of Nano/Micron Dicarboxylic Acids and Inorganic Ions in Suburban PM Episode and Non-Episodic Aerosol," Atmospheric Environment, Vol. 43, pp. 4396-4406 (2009). Hu, M., Z. Wu, J. Slanina, P. Lin, S. Liu and L. Zeng, "Acidic Gases, Ammonia and Water-Soluble Ions in PM2.5 at a Coastal Site in the Pearl River Delta, China," Atmospheric Environment, Vol. 42, pp. 6310-6320 (2008). Hutchings, N. J., S. G. Sommer, J. M. Andersen and W. A. H. Asman, "A Setailed Ammonia Emission Inventory for Denmark," Atmospheric Environment, Vol. 35, pp. 1959-1968 (2001). John, W., S. M. Wall and J. L. Ondo, "A New Method for Nitric Acid and Nitrate Aerosol Measurement Using the Dichotomous Sampler," Atmospheric Environment (1967), Vol. 22, pp. 1627-1635 (1988). Kadowaki, S., "On the Nature of Atmospheric Oxidation Processes of Sulfur Dioxide to Sulfate and of Nitrogen Dioxide to Nitrate on the Basis of Diurnal Variations of Sulfate, Nitrate, and Other Pollutants in an Urban Area," Environmental Science & Technology, Vol. 20, pp. 1249-1253 (1986). Kaneyasu, N., H. Yoshikado, T. Mizuno, K. Sakamoto and M. Soufuku, "Chemical Forms and Sources of Extremely High Nitrate and Chloride in Winter Aerosol Pollution in the Kanto Plain of Japan," Atmospheric Environment, Vol. 33, pp. 1745-1756 (1999). Khan, M. F., Y. Shirasuna, K. Hirano and S. Masunaga, "Characterization of PM2.5, PM2.5-10 and PM>10 in Ambient Air, Yokohama, Japan," Atmospheric Research, Vol. 96, pp. 159-172 (2010). Khoder, M. I., "Atmospheric Conversion of Sulfur Dioxide to Particulate Sulfate and Nitrogen Dioxide to Particulate Nitrate and Gaseous Nitric Scid in an Urban Area," Chemosphere, vol. 49, pp. 675-684 (2002). Koçak, M., N. Mihalopoulos and N. Kubilay, "Chemical Composition of the Fine and Coarse Fraction of Aerosols in the Northeastern Mediterranean," Atmospheric Environment, Vol. 41, pp. 7351-7368 (2007). Kuo, C. Y., P. T. Chen, Y. C. Lin, C. Y. Lin, H. H. Chen and J. F. Shih, "Factors Affecting the Concentrations of PM10 in Central Taiwan," Chemosphere, Vol. 70, pp. 1273-1279 (2008). Laden, F., J. Schwartz, F. E. Speizer and D. W. Dockery, "Reduction in Fine Particulate Air Pollution and Mortality: Extended Follow-up of the Harvard Six Cities Study," American Journal of Respiratory and Critical Care Medicine, Vol. 173, pp. 667-672 (2006). Lightowlers, P. J. and J. N. Cape, "Sources and Fate of Atmospheric HCl in the U.K. and Western Europe," Atmospheric Environment (1967), Vol. 22, pp. 7-15 (1988). Lin, M., T. Oki, T. Holloway, D. G. Streets, M. Bengtsson and S. Kanae, "Long-Range Transport of Acidifying Substances in East Asia--Part I: Model Evaluation and Sensitivity Studies," Atmospheric Environment, Vol. 42, pp. 5939-5955 (2008). Lin, Y. C., M. T. Cheng, W. Y. Ting and C. R. Yeh, "Characteristics of Gaseous HNO2, HNO3, NH3 and Particulate Ammonium Nitrate in an Urban City of Central Taiwan," Atmospheric Environment, Vol. 40, pp. 4725-4733 (2006). Lin, Y. C. and M. T. Cheng, "Evaluation of Formation Rates of NO2 to Gaseous and Particulate Nitrate in the Urban Atmosphere," Atmospheric Environment, Vol. 41, pp. 1903-1910 (2007). Lin, Y. C., M. T. Cheng, W. H. Lin, Y. Y. Lan and B. J. Tsuang, "Causes of the Elevated Nitrate Aerosol Levels during Episodic Days in Taichung Urban Area, Taiwan," Atmospheric Environment, Vol. 44, pp. 1632-1640 (2010). Lonati, G., M. Giugliano, P. Butelli, L. Romele and R. Tardivo, "Major Chemical Components of PM2.5 in Milan(Italy)," Atmospheric Environment, Vol. 39, pp. 1925-1934 (2005). McMurry, P. H. and J. C. Wilson, "Droplet Phase (Heterogeneous) and Gas Phase (Homogeneous) Contributions to Secondary Ambient Aerosol Formation as Functions of Relative Humidity," Journal of Geophysical Research, Vol. 88, pp. 5101-5108 (1983). Miller, K. A., D. S. Siscovick, L. Sheppard, K. Shepherd, J. H. Sullivan, G. L. Anderson and J. D. Kaufman, "Long-Term Exposure to Air Pollution and Incidence of Cardiovascular Events in Women," New England Journal of Medicine, Vol. 356, pp. 447-458 (2007). Nair, P. V. N., P. V. Joshi, U. C. Mishra and K. G. Vohra, "Growth of Aqueous Solution Droplets of HNO3 and HCl in the Atmosphere," Journal of the Atmospheric Sciences, Vol. 40, pp. 107-115 (1983). Pagsberg, P., E. Bjergbakke, E. Ratajczak and A. Sillesen, "Kinetics of the Gas phase Reaction OH + NO(+M)-->HONO(+M) and the Determination of the UV Absorption Cross Sections of HONO," Chemical Physics Letters, Vol. 272, pp. 383-390 (1997). Park, S. S., J. M. Ondov, D. Harrison and N. P. Nair, "Seasonal and Shorter-Term Variations in Particulate Atmospheric Nitrate in Baltimore," Atmospheric Environment, Vol. 39, pp. 2011-2020 (2005). Parmar, R. S., G. S. Satsangi, A. Lakhani, S. S. Srivastava and S. Prakash, "Simultaneous Measurements of Ammonia and Nitric Acid in Ambient Air at Agra (27°10''N and 78°05''E) (India)," Atmospheric Environment, Vol. 35, pp. 5979-5988 (2001). Pathak, R. K., T. Wang and W. S. Wu, "Nighttime Enhancement of PM2.5 Nitrate in Ammonia-Poor Atmospheric Conditions in Beijing and Shanghai: Plausible Contributions of Heterogeneous Hydrolysis of N2O5 and HNO3 Partitioning," Atmospheric Environment, Vol. 45, pp. 1183-1191 (2011). Perrino, C., M. Catrambone, A. Di Menno Di Bucchianico and I. Allegrini, "Gaseous Ammonia in the Urban Area of Rome, Italy and Its Relationship with Traffic Emissions," Atmospheric Environment, Vol. 36, pp. 5385-5394 (2002). Plessow, K., G. Spindler, F. Zimmermann and J. Matschullat, "Seasonal Variations and Iinteractions of N-Containing Gases and Particles over a Coniferous Forest, Saxony, Germany," Atmospheric Environment, Vol. 39, pp. 6995-7007 (2005). Reisinger, A. R., "Observations of HNO2 in the Polluted Winter Atmosphere: Possible Heterogeneous Production on Aerosols," Atmospheric Environment, Vol. 34, pp. 3865-3874 (2000). Ren, X., H. Harder, M. Martinez, R. L. Lesher, A. Oliger, T. Shirley, J. Adams, J. B. Simpas and W. H. Brune, "HOx Concentrations and OH Reactivity Observations in New York City during PMTACS-NY2001," Atmospheric Environment, Vol. 37, pp. 3627-3637 (2003). Ren, X., H. Harder, M. Martinez, R. L. Lesher, A. Oliger, J. B. Simpas, W. H. Brune, J. J. Schwab, K. L. Demerjian, Y. He, X. Zhou and H. Gao, "OH and HO2 Chemistry in the Urban Atmosphere of New York City," Atmospheric Environment, Vol. 37, pp. 3639-3651 (2003). Robarge, W. P., J. T. Walker, R. B. McCulloch and G. Murray, "Atmospheric Concentrations of Ammonia and Ammonium at an Agricultural Site in the Southeast United States," Atmospheric Environment, Vol. 36, pp. 1661-1674 (2002). Seinfeld, J. H. and S. N. Pandis, "Atmospheric Chemistry and Physics from Air Pollution to Climate Change," John Wiley & Sons, New York (1998). Shaw, R. W., R. K. Stevens, J. Bowermaster, J. W. Tesch and E. Tew, "Measurements of Atmospheric Nitrate and Nitric acid: The Denuder Difference Experiment," Atmospheric Environment (1967), Vol. 16, pp. 845-853 (1982). Shen, Z., J. Cao, R. Arimoto, Z. Han, R. Zhang, Y. Han, S. Liu, T. Okuda, S. Nakao and S. Tanaka, "Ionic Composition of TSP and PM2.5 during Dust Storms and Air Pollution Episodes at Xi''an, China," Atmospheric Environment, Vol. 43, pp. 2911-2918 (2009). Singh, S. P., G. S. Satsangi, P. Khare, A. Lakhani, K. Maharaj Kumari and S. S. Srivastava, "Multiphase Measurement of Atmospheric Ammonia," Chemosphere - Global Change Science, Vol. 3, pp. 107-116 (2001). Stelson, A. W. and J. H. Seinfeld, "Relative Humidity and Temperature Dependence of the Ammonium Nitrate Dissociation Constant," Atmospheric Environment, Vol. 16, pp. 983-992 (1982). Svensson, R., E. Ljungström and O. Lindqvist, "Kinetics of the Reaction between Nitrogen Dioxide and Water Vapour," Atmospheric Environment (1967), Vol. 21, pp. 1529-1539 (1987). Tang, I. N. and H. R. Munkelwitz, "Composition and Temperature Dependence of the Deliquescence Properties of Hygroscopic Aerosols," Atmospheric Environment. Part A. General Topics, Vol. 27, pp. 467-473 (1993). Tao, J., K. F. Ho, L. Chen, L. Zhu, J. Han and Z. Xu, "Effect of Chemical Composition of PM2.5 on Visibility in Guangzhou, China, 2007 Spring," Particuology, Vol. 7, pp. 68-75 (2009). Tsai, C. J. and S. N. Perng, "Artifacts of Ionic Species for Hi-Vol PM10 and PM10 dichotomous samplers, " Atmospheric Environment, Vol. 32, pp. 1605-1613 (1998). Tsai, Y. I. and C. L. Chen, "Characterization of Asian Dust Storm and Non-Asian Dust Storm PM2.5 Aerosol in Southern Taiwan," Atmospheric Environment, Vol. 40, pp. 4734-4750 (2006). Tsai, Y. I. and C. L. Chen, "Atmospheric Aerosol Composition and Source Apportionments to Aerosol in Southern Taiwan," Atmospheric Environment, Vol. 40, pp. 4751-4763 (2006). Tsuang, B. J., C. L. Chen, C. H. Lin, M. T. Cheng, Y. I. Tsai, C. P. Chio, R. C. Pan and P. H. Kuo, "Quantification on the Source/Receptor Relationship of Primary Pollutants and Secondary Aerosols by a Gaussian Plume Trajectory Model: Part II. Case Study," Atmospheric Environment, Vol. 37, pp. 3993-4006 (2003). Wall, S. M., W. John and J. L. Ondo, "Measurement of Aerosol Size Distributions for Nitrate and Major Ionic Species," Atmospheric Environment (1967), Vol. 22, pp. 1649-1656 (1988). Wang, H. and D. Shooter, "Coarse-Fine and Day-Night Differences of Water-Soluble Ions in Atmospheric Aerosols Collected in Christchurch and Auckland, New Zealand," Atmospheric Environment, Vol. 36, pp. 3519-3529 (2002). Wang, Y., G. Zhuang, X. Zhang, K. Huang, C. Xu, A. Tang, J. Chen and Z. An, "The Ion Chemistry, Seasonal Cycle, and Sources of PM2.5 and TSP Aerosol in Shanghai," Atmospheric Environment, Vol. 40, pp. 2935-2952 (2006). Yin, J., R. M. Harrison, Q. Chen, A. Rutter and J. J. Schauer, "Source Apportionment of Fine Particles at Urban Background and Rural Sites in the UK Atmosphere," Atmospheric Environment, Vol. 44, pp. 841-851 (2010). Zhu, C. S., C. C. Chen, J. J. Cao, C. J. Tsai, C. Chou, S. C. Liu and G. D. Roam, "Characterization of Carbon Fractions for Atmospheric Fine Particles and Nanoparticles in a Highway Tunnel," Atmospheric Environment, Vol. 44, pp. 2668-2673 (2010). 徐志灝、盧炳利、張祥鴻、程萬里,「中部地區混合層特性與臭氧濃度之相關分析」,第二十屆空氣污染控制技術研討會論文專輯,臺中 (2003)。 鄭曼婷,程萬里,張艮輝,林沛練,莊秉潔,王竹方,郭重義,林宗嵩,王重傑,黃景祥,白曛綾,「中部地區空氣污染總量管制技術資料建立與應用」,贏政院環保署研究報告 (2000)。 鄭尊仁,「細懸浮微粒(PM2.5)空氣品質標準訂定建議及學理分析研究」,環保署/國科會空污防制科研合作計畫成果報告書 (2010)。 盧信忠、謝仁傑、沈銘祥,「臺中地區高PM10濃度值之分佈特性」,第十九屆空氣污染控制技術研討會論文專輯,臺北 (2002)。
研究結果顯示環形擴散採樣器(Denuder)量測之PM2.5於2010年3月至2011年2月採樣期間平均濃度為43.8 μg/m3,其主要水溶性離子成分為SO42-、NO3-及NH4+,濃度分別為7.0 μg/m3 (16.7%)、5.4 μg/m3 (11.1%)及3.7 μg/m3 (8.4 %),雙粒徑分道採樣器(Dichot)量測之PM2.5平均濃度為33.3 μg/m3,主要水溶性離子成分為SO42-、NH4+及NO3-,濃度分別為6.1 μg/m3 (19.7%)、3.7 μg/m3 (11.0 %)及2.8 μg/m3 (7.5%),Denuder採集之NO3-平均濃度為5.08 μg/m3,比Dichot多2.13 μg/m3,兩者比較可得一迴歸公式:[NO3-] Denuder = 1.47 [NO3-] Dichot + 0.86 (μg/m3)。Denuder春、夏、秋、冬的NO3-揮發量(揮發濃度佔總濃度比例)分別為51%、59%、 46%及36%,NO3-揮發量與溫度有良好正相關(r=0.62),與相對濕度為負相關(r=0.41)。
前驅氣體污染物HCl、HNO2、HNO3、SO2及NH3採樣期間平均濃度分別為0.33、2.26、0.93、3.80及7.96 μg/m3,硫轉化率(Fs)全年平均為27.5 %,氮轉化率Fn為7.9 %,顯示採樣期間臺中都會區的硫氧化物及氮氧化物多以SO2及 NO2的型態存在,Fs有日低夜高趨勢,Fn日夜差異不明顯,Fs除了春季日間與相對濕度有良好相關性0.61以外,與其他氣象因子無明顯相關性,而Fn日間與O3-max有正相關性,Fn夜間則與相對濕度呈現正相關。

An annular denuder system was used to collect PM2.5 (particles with aerodynamic diameter less than 2.5 μm) and gaseous pollutants in the Taichung urban area. Samples were analyzed for their chemical composition using an ion chromatograph. We explored the characteristics of PM2.5 particles and gaseous pollutants and assessed the influence of seasonal and diurnal trends in the Taichung metropolitan area. In addition, an annular denuder system and dichotomous sampler were used to establish the correction factor for NO3- concentration. This correction factor can be used to correct the underestimation of the dichotomous sampler due to capture the volatile components.
Results measured by using the denuder indicated an average PM2.5 concentration of 43.8 μg/m3 during the sampling period of March 2010 to February 2011. The main water-soluble ionic composition in the samples measured by Denuder is SO42- (16.7%)、NO3- (11.1%) and NH4+ (8.4 %). The average concentration of PM2.5 measured by Dichot is 33.3 μg/m3, with the main water-soluble ionic composition being SO42- (19.7%)、NH4+ (11.0 %) and NO3- (7.5%). The average concentration of NO3- collected by Denuder is 5.08 μg/m3, an average of 2.13 μg/m3 more than that measured by Dichot. A comparison between the two measurements yields the regression formula: [NO3-] Denuder = 1.47 [NO3-] Dichot + 0.86 (μg/m3). Volatilization of NO3- (the percentage of the volatile concentration and the total concentration) measured by Denuder in the spring, summer, autumn and winter were 51%, 59%, 46% and 36%. There is a significant positive correlation between the volatilization of NO3- and temperature, as well as a significant negative correlation between the volatilization of NO3- and relative humidity.
The average concentrations of HCl、HNO2、HNO3、SO2 and NH3 were 0.33、2.26、0.93、3.80 and 7.96 μg/m3, respectively. The annual average of sulfur conversion ratio is 27.5%, while the nitrogen conversion ratio is 7.9%. Results from the sampling period indicated that in the Taichung metropolitan area, sulfur oxides and nitrogen oxides are mainly released in the form of SO2 and NO2. Fs is significant lower during the day and higher at night, while no significant difference was observed for Fn between the daytime and nighttime. In the spring, there is a significant positive correlation between Fs and relative humidity, with Fs having no significant correlation with any other meteorological factors. Results also showed a positive correlation between Fn and O3-max during the day and between Fn and relative humidity at night.
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