TY - JOUR
T1 - Mass-size distributions of particulate sulfate, nitrate, and ammonium in a particulate matter nonattainment region in southern Taiwan
AU - Tsai, Jiun Homg
AU - Chang, Kai Lun
N1 - Funding Information:
This work was supported by the National Science Council, Republic of China, through Grant NSC91-2621-Z-006-004.
PY - 2005/4
Y1 - 2005/4
N2 - Concentrations and distributions of three major water-soluble ion species (sulfate, nitrate, and ammonium) contained in ambient particles were measured at three sampling sites in the Kao-ping ambient air quality basin, Taiwan. Ambient particulate matter (PM) samples were collected in a Micro-orifice Uniform Deposit Impactor from February to July 2003 and were analyzed for water-soluble ion species with an ion chromatograph. The PM1/PM2.5 and PM1/PM10 concentration ratios at the emission source site were 0.73 and 0.53 and were higher than those (0.68 and 0.48) at the background site because there are more combustion sources (i.e., industrial boilers and traffic) around the emission source site. Mass-size distributions of PM NO3− were found in both the fine and coarse modes. SO42− and NH4+ were found in the fine particle mode (PM2.5), with significant fractions of submicron particles (PM1). The source site had higher PM1/PM10 (79, 42, and 90%) and PM1/PM2.5 concentration ratios (90, 58, and 93%) for the three major inorganic secondary aerosol components (SO42−, NO3−, and NH4+) than the receptor site (65, 27, and 65% for PM1/PM10; 69, 51, and 70% for PM1/PM2.5). Results obtained in this study indicate that the PM1 (submicron aerosol particles) fraction plays an important role in the ambient atmosphere at both emission source and receptor sites. Further studies regarding the origin and formation of ambient secondary aerosols are planned.
AB - Concentrations and distributions of three major water-soluble ion species (sulfate, nitrate, and ammonium) contained in ambient particles were measured at three sampling sites in the Kao-ping ambient air quality basin, Taiwan. Ambient particulate matter (PM) samples were collected in a Micro-orifice Uniform Deposit Impactor from February to July 2003 and were analyzed for water-soluble ion species with an ion chromatograph. The PM1/PM2.5 and PM1/PM10 concentration ratios at the emission source site were 0.73 and 0.53 and were higher than those (0.68 and 0.48) at the background site because there are more combustion sources (i.e., industrial boilers and traffic) around the emission source site. Mass-size distributions of PM NO3− were found in both the fine and coarse modes. SO42− and NH4+ were found in the fine particle mode (PM2.5), with significant fractions of submicron particles (PM1). The source site had higher PM1/PM10 (79, 42, and 90%) and PM1/PM2.5 concentration ratios (90, 58, and 93%) for the three major inorganic secondary aerosol components (SO42−, NO3−, and NH4+) than the receptor site (65, 27, and 65% for PM1/PM10; 69, 51, and 70% for PM1/PM2.5). Results obtained in this study indicate that the PM1 (submicron aerosol particles) fraction plays an important role in the ambient atmosphere at both emission source and receptor sites. Further studies regarding the origin and formation of ambient secondary aerosols are planned.
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U2 - 10.1080/10473289.2005.10464640
DO - 10.1080/10473289.2005.10464640
M3 - Article
C2 - 15887893
AN - SCOPUS:17844399581
SN - 1096-2247
VL - 55
SP - 502
EP - 509
JO - Journal of the Air and Waste Management Association
JF - Journal of the Air and Waste Management Association
IS - 4
ER -