Characterization of atmospheric PM10 and related chemical species in southern Taiwan during the episode days.
The concentrations of atmospheric PM10 on days with episodes of pollution were examined at four different sampling sites (CC, DL, LY, and HK) in southern Taiwan. The related to particulates water-soluble ionic species (Na+, K+, Mg2+, Ca2+, NH4+, Cl-, NO3-, SO4(2-)), carbonaceous species (EC and OC) and metallic species (Zn, Ni, Pb, Fe, Mn, Al, Si, V) were also analyzed. On the episode days of this study, the PM10 mass concentration ranged from 155 to 210 microgm(-3), from 150 to 208 microgm(-3), from 182 to 249 microgm(-3), and from 166 to 228 microgm(-3) at CC, DL, LY, and HK, respectively. The results indicate that the dominant water-soluble species were SO4(2-), NO3-, NH4+, and Cl- at the four sampling sites on these days. Moreover, the high sulfate and nitrate conversion values (SOR and NOR) presented herein suggest that secondary formations from SO2 to SO4(2-) and from NO2 to NO3- are present in significant quantities in the atmosphere of southern Taiwan on episode days. In particular, high SOR and NOR verified that both SO4(2-) and NO3- dominated the increase of atmospheric PM10 concentration in southern Taiwan on episode days.
Chen
Shui-Jen
SJ
Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Nei Pu 912, Ping Tung 91201, Taiwan. chensj@mail.npust.edu.tw
Hsieh
Lien-Te
LT
Tsai
Chi-Cheng
CC
Fang
Guor-Cheng
GC
D000393:Air Pollutants / Q000032:analysis*; D002244:Carbon / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D009566:Nitrates / Q000737:chemistry; D010316:Particle Size; D013431:Sulfates / Q000737:chemistry; D013624:Taiwan
D000393:Air Pollutants; D007477:Ions; D008670:Metals; D009566:Nitrates; D013431:Sulfates; D002244:Carbon