"The 2018 Project of Chemical Speciation Monitoring and Analysis
「"The 2018 Project of Chemical Speciation Monitoring and Analysis」於資料集「EPQSummary_EnvironmentalMonitoringAndTesting」由單位「行政院環境保護署」的陳先生所提供，聯繫電話是02-2311-7722#2386，最近更新時間為：2023-07-30 01:01:45。 欄位Project Title的內容是"The 2018 Project of Chemical Speciation Monitoring and Analysis of Fine Particulate Matter (PM2.5)" ， 欄位Project Subject的內容是"This study presents the results of regular PM2.5 (aerodynamic diameters equal to or smaller than 2.5 μm) collection at the Banqiao, Zongming, Douliu, Chiayi, Xiaogang, and Hualien sites in Taiwan every six days from January to November in 2018 (with the additional December 2017 data). PM2.5 mass, water-soluble inorganic ions, carbonaceous contents, and metal elements were resolved for further analysis. In addition, the work also assessed the comparability of metal element monitoring from an automated instrument and established a new organic compound analytical method. Utilizing the analyzed water-soluble inorganic ions, carbonaceous contents, and metal elements, this study investigated the characteristics of temporal and spatial distributions of PM2.5 mass and chemical components, apportioned source contributions, and evaluated atmospheric visibility influencing factors.The results showed that PM2.5 mass levels increased in the order from east (10 μg m-3), north, to the south (24 μg m-3) of Taiwan during the sampling period. The season of highest PM2.5 mass levels at the Banqiao, Zongming, and Hualien sites were in spring, while that of the Douliu, Chiayi, and Xiaogan sites were in winter. Summer was the lowest season of PM2.5 mass levels at all sites. In general, SO42- and organic carbon were the two most abundant components at all sites except NO3- at the Douliu, Chiayi, and Xiaogan sites in winter. Among high, medium, and low concentration groups of metal elements, high concentration group was with natural origins, while medium concentration group was with contributions mostly from fuel oil and coal burnings, metal refining, and traffic emissions. In contrast, the low concentration group was with characteristics of coal burning, metal surface coating, and brake and tire wearing. The volatilizations of NO3- and Cl- were the highest in summer and spring, respectively, while NH4+ was relatively stable across seasons. Influencing volatilization factors include ambient temperature, pollution sources, and chemical compound forms of volatilized components. Meanwhile, positive interferences of volatilized organic carbons adsorbed by quartz-fiber filters varied less than negative interferences from volatilization of the collected carbonaceous particles. Volatilization of the collected carbonaceous particles were primarily under the influences of pollution sources and events. For the trace contents of organic compounds, this study successfully utilized gas flow modulator as a core with a full fledge of two-dimension gas chromatography coupled with time-flight mass spectrometry. The Qualitative organic contents of PM2.5 comprised mostly nitrogenous and phthalate compounds at the Banqiao site.During the sampling period, events with PM2.5 greater than 35 μg m-3 tended to increase from north to south. Most events were under the influences of bad environmental ventilation and local source emissions and frequently originated from previous night of the sampling day. The events often got worse accompanied by regional pollution transport on the same day. In addition, high ozone concentration frequently occurred in the pollution events of late winter and early spring. From the resolved component ratios in PM2.5, NO3- was the sole component increased greatly in all high PM2.5 events in contrast to non-event samples, which was consistent with the findings over the past three years. For seasonal variations, the enhancements of SO42-, NO3-, and fuel oil- and coal-burning tracers were predominant in winter. However, in spring, NO3-, Cl , EC, traffic emissions, fuel oil- and coal-burning tracers increased prevalently but with less SO42- increase. Similarly, the enhancements of NO3-, Cl , biomass burning, industrial sources, and traffic emissions were significant but with less SO42- in fall.For source apportionment using positive matrix factoriza..." ， 欄位Project Year的內容是2018 ， 欄位Organizer的內容是"Department of Environmental Monitoring ＆amp; Information Management" ， 欄位Executive Unit的內容是"國李中央大學" ， 欄位Reporting download URL的內容是https://epq.epa.gov.tw/project/filedownload.aspx?fid=187354 ， 欄位Publish Date的內容是20190201 。
Project Title
"The 2018 Project of Chemical Speciation Monitoring and Analysis of Fine Particulate Matter (PM2.5)"
Project Subject
"This study presents the results of regular PM2.5 (aerodynamic diameters equal to or smaller than 2.5 μm) collection at the Banqiao, Zongming, Douliu, Chiayi, Xiaogang, and Hualien sites in Taiwan every six days from January to November in 2018 (with the additional December 2017 data). PM2.5 mass, water-soluble inorganic ions, carbonaceous contents, and metal elements were resolved for further analysis. In addition, the work also assessed the comparability of metal element monitoring from an automated instrument and established a new organic compound analytical method. Utilizing the analyzed water-soluble inorganic ions, carbonaceous contents, and metal elements, this study investigated the characteristics of temporal and spatial distributions of PM2.5 mass and chemical components, apportioned source contributions, and evaluated atmospheric visibility influencing factors.The results showed that PM2.5 mass levels increased in the order from east (10 μg m-3), north, to the south (24 μg m-3) of Taiwan during the sampling period. The season of highest PM2.5 mass levels at the Banqiao, Zongming, and Hualien sites were in spring, while that of the Douliu, Chiayi, and Xiaogan sites were in winter. Summer was the lowest season of PM2.5 mass levels at all sites. In general, SO42- and organic carbon were the two most abundant components at all sites except NO3- at the Douliu, Chiayi, and Xiaogan sites in winter. Among high, medium, and low concentration groups of metal elements, high concentration group was with natural origins, while medium concentration group was with contributions mostly from fuel oil and coal burnings, metal refining, and traffic emissions. In contrast, the low concentration group was with characteristics of coal burning, metal surface coating, and brake and tire wearing. The volatilizations of NO3- and Cl- were the highest in summer and spring, respectively, while NH4+ was relatively stable across seasons. Influencing volatilization factors include ambient temperature, pollution sources, and chemical compound forms of volatilized components. Meanwhile, positive interferences of volatilized organic carbons adsorbed by quartz-fiber filters varied less than negative interferences from volatilization of the collected carbonaceous particles. Volatilization of the collected carbonaceous particles were primarily under the influences of pollution sources and events. For the trace contents of organic compounds, this study successfully utilized gas flow modulator as a core with a full fledge of two-dimension gas chromatography coupled with time-flight mass spectrometry. The Qualitative organic contents of PM2.5 comprised mostly nitrogenous and phthalate compounds at the Banqiao site.During the sampling period, events with PM2.5 greater than 35 μg m-3 tended to increase from north to south. Most events were under the influences of bad environmental ventilation and local source emissions and frequently originated from previous night of the sampling day. The events often got worse accompanied by regional pollution transport on the same day. In addition, high ozone concentration frequently occurred in the pollution events of late winter and early spring. From the resolved component ratios in PM2.5, NO3- was the sole component increased greatly in all high PM2.5 events in contrast to non-event samples, which was consistent with the findings over the past three years. For seasonal variations, the enhancements of SO42-, NO3-, and fuel oil- and coal-burning tracers were predominant in winter. However, in spring, NO3-, Cl , EC, traffic emissions, fuel oil- and coal-burning tracers increased prevalently but with less SO42- increase. Similarly, the enhancements of NO3-, Cl , biomass burning, industrial sources, and traffic emissions were significant but with less SO42- in fall.For source apportionment using positive matrix factoriza..."
Project Year
2018
Organizer
"Department of Environmental Monitoring ＆amp; Information Management"
Executive Unit
"國李中央大學"
Reporting download URL
Publish Date
20190201
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