TY - JOUR
T1 - Size distribution and water soluble ions of ambient particulate matter on episode and non-episode days in southern Taiwan
AU - Tsai, Jiun Horng
AU - Lin, Jian Hung
AU - Yao, Yung Chen
AU - Chiang, Hung Lung
PY - 2012/4
Y1 - 2012/4
N2 - Distribution of inorganic ions at an urban/industrial/agricultural complex was investigated in southern Taiwan during particulate matter (PM) episode and non-episode periods, and the Micro Orifice Uniform Deposit Impactor (MOUDI) and nano-MOUDI were employed to take PM samples. In PM episode periods, the PM significantly increased in mass concentration and in the size ranges of 0.1-1.0 and 1.8-18 μm at the site. Sulfate, nitrate and ammonium were the dominant ionic species and contributed a large fraction of PM mass in different sizes. The nitrate concentration increase on episode days could be attributed to the increase of precursor gas-NO 2 concentration during these periods. In addition, SO 2 was significantly correlated to SO 4 2- in the nuclei mode (PM 0.1), which indicated that the gas had transferred into particulate matter. The molar equivalent ratio of {[NO 3 -] + [SO 4 2-]}/[NH 4 +] was about 0.99 and revealed a high correlation that could indicate the presence of ammonium nitrate and ammonium sulfate in PM1.
AB - Distribution of inorganic ions at an urban/industrial/agricultural complex was investigated in southern Taiwan during particulate matter (PM) episode and non-episode periods, and the Micro Orifice Uniform Deposit Impactor (MOUDI) and nano-MOUDI were employed to take PM samples. In PM episode periods, the PM significantly increased in mass concentration and in the size ranges of 0.1-1.0 and 1.8-18 μm at the site. Sulfate, nitrate and ammonium were the dominant ionic species and contributed a large fraction of PM mass in different sizes. The nitrate concentration increase on episode days could be attributed to the increase of precursor gas-NO 2 concentration during these periods. In addition, SO 2 was significantly correlated to SO 4 2- in the nuclei mode (PM 0.1), which indicated that the gas had transferred into particulate matter. The molar equivalent ratio of {[NO 3 -] + [SO 4 2-]}/[NH 4 +] was about 0.99 and revealed a high correlation that could indicate the presence of ammonium nitrate and ammonium sulfate in PM1.
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U2 - 10.4209/aaqr.2011.10.0167
DO - 10.4209/aaqr.2011.10.0167
M3 - Article
AN - SCOPUS:84863281016
SN - 1680-8584
VL - 12
SP - 263
EP - 274
JO - Aerosol and Air Quality Research
JF - Aerosol and Air Quality Research
IS - 2
ER -