EPA-96-FA11-03-A238

096

800 千元

2007/11/16

2008/11/30

鍾孟臻

監資處

吳權芳

環球技術學院

環境資訊系統

PM10,PM2.5,水溶性陰陽離子,臭氧

PM10,PM2.5,soluble anion and cation, ozone

劉建慧

吳權芳

05-5370988-8222

cfwu@sun.epa.gov.tw

本工作計畫進行中部及雲嘉南空品區之大氣懸浮微粒質量濃度調查，以及懸浮微粒水溶性陰陽離子組成分析；採樣地點包括竹山測站、台西工業空氣品質監測站、新港測站，及朴子測站。主要工作內容進行懸浮微粒組成、粒徑分佈及特性、污染源衍生之懸浮微粒及臭氧O3相關聯性之調查，並利用風向、風速的資訊，探討採樣區受擴散、長程傳輸及逸散性污染排放的影響。 本工作計畫於竹山、台西測站分別設置高流量採樣器，新港、朴子測站設置雙粒徑採樣器，於97年1月至10月上旬進行每8日之週期採樣，以及空氣品質不良事件（懸浮微粒及臭氧）之連續3日(以上)採樣。採樣期間逢遇之高濃度懸浮微粒事件，集中於2~4月，於97.02.29.~97.03.05.期間有沙塵暴事件，臭氧事件分別發生於5月、9月及10月份。懸浮微粒事件主要因擴散不良而造成採樣地區高濃度，以97年3月最為頻繁，並顯示衍生性氣膠NO3-、SO42-、NH4+有高濃度之情形，其中以NO3-濃度累積最為明顯。於沙塵暴事件日顯示PM10中Ca2+呈現急遽的增加，而臭氧事件日，以SO42-為主要顯著高於非事件日濃度的物種；相較於臭氧最大小時值O3,max，衍生性氣膠與臭氧最大八小時O3,8hr值顯示較高的關聯性。 台西測站因鄰近工業區有間歇性高濃度的SO2，但是衍生性氣膠與主要污染物的關聯度並不明顯，然而於竹山測站衍生性之NO3-與前趨污染物NO2呈現中高度的正相關，顯示竹山採樣地區有較利於衍生性氣膠形成的環境；新港、朴子地區則顯示傳輸為懸浮微粒的重要來源機制。由風向及氣流逆軌跡推測污染物的傳輸，顯示在台西地區的高污染事件部分可能與六輕工業區的排放有關，其亦可能影響東南方新港地區的空氣品質，高濃度污染的氣流推估行經沿岸而到達內陸的採樣測點。

PM10,PM2.5,水溶性陰陽離子,臭氧

EPA96FA1103A238.pdf

1MB

[期末報告]公開完整版

2009/3/1 上午 12:00:00

This project proformed the investigations of ambient particulate matters at four monitoring stations, Zhu-Shan, Taixi, Xin-Gang, and Puzi, in the Central and Yun-Jia-Nan Area. Water-soluble anions and cations of particulate samples were analyzed to understand chemical composition and the characteristics at each sampling site. Correlations between secondary aerosols and ozone were also investiged. The inferences of air quality due to dispersion, transportation, and primary pollutants emission were reviewed by the weather condition. High volumn particulate samplers were sited at Zhu-Shan and Taixi stations, and Dichomotous particulate samplers at the Xin-Gang and Puzi stations. The sampling was proformed every eight days during the period of January to early October, 2008. In the case of episodes of either particulate matter or ozone, sampling was continued for at least three days. High levels of particulate matters were detected mostly during February to April, 2008. A sand storm was claimed from February 29th to March 5th. The ozone episodes were occurred in May, September, and October. Due to poor dispersion, high concentrations of particulate matter and also the secondary NO3-, SO42- and NH4+, were detected often in March. The increase of nitrate was obvious during the events. While during the event of sand storm, rich calsium in PM10 were carried in. At the ozone episodes, significant increases of sulphate were measured, and secondary aerosols were found more related to O3,8hr rather than O3,max. Although Taixi station which near the industrial area would detect high SO2 occasionally, the correlations between secondary aerosols and primary pollutants were shown moderate. Zhu-Shan however revealed as a site with higher possibility for secondary aerosol formation. While it showed that transportation was more important at Xin-Gang and at Puzi area. By using the information of wind direction and air backward trajectory, the exhaust from the near industrial area may cause some pollution events occurred in Taixi and in Xin-Gang sampling sites. Polluted air parcel was trailed by passing through the coast then arriving at the inland sites.

PM10,PM2.5,soluble anion and cation, ozone