TY - JOUR
T1 - Chemical characteristics of submicron particles in winter in Xi'an
AU - Shen, Zhenxing
AU - Cao, Junji
AU - Tong, Zhi
AU - Liu, Suixin
AU - Reddy, Lingala Sankara Reddy
AU - Han, Yuemei
AU - Zhang, Ting
AU - Zhou, Juan
PY - 2009/3
Y1 - 2009/3
N2 - Daily submicron aerosol samples (PM1, particles less than 1 μm in diameter) were collected continuously from Dec. 1 to Dec. 31, 2006 and the concentrations of 11 water-soluble ions (Na+, NH+, K+, Mg2+, Ca2+, F-, Cl-, Br-, NO2- NO3- and SO42-) and elemental carbon (EC) and organic carbon (OC) were determined in the filter samples to characterize the chemical composition of PM1 over Xi'an during winter. The mean PM1 mass concentration was 149.7 μg/m 3. Water-soluble ions were dominant chemical species and occupied to 46% of PMi mass. Na+, NH4+, Ca2+, Cl -, SO42- and NC- were the major species of ionic compounds, which accounted for 95.3% of total ions concentration. The average OC and EC concentrations were 23.7 ± 10.27 μg/m3 and 4.6 ± 1.8 μg/m3, respectively. Carbonaceous aerosol is another major component of PM1, and total carbonaceous aerosol occupied to 27.5% of PMi mass. High OC and OC/EC ratio were found in Xi'an in comparison with the past studies in Hong Kong and Taipei. Factor analysis on the eight carbon fractions shows that coal combustion and gasoline automobile exhaust, diesel automobile exhaust, and biomass burning were found to be statistically significant and explained 93% of the carbonaceous aerosols contributions.
AB - Daily submicron aerosol samples (PM1, particles less than 1 μm in diameter) were collected continuously from Dec. 1 to Dec. 31, 2006 and the concentrations of 11 water-soluble ions (Na+, NH+, K+, Mg2+, Ca2+, F-, Cl-, Br-, NO2- NO3- and SO42-) and elemental carbon (EC) and organic carbon (OC) were determined in the filter samples to characterize the chemical composition of PM1 over Xi'an during winter. The mean PM1 mass concentration was 149.7 μg/m 3. Water-soluble ions were dominant chemical species and occupied to 46% of PMi mass. Na+, NH4+, Ca2+, Cl -, SO42- and NC- were the major species of ionic compounds, which accounted for 95.3% of total ions concentration. The average OC and EC concentrations were 23.7 ± 10.27 μg/m3 and 4.6 ± 1.8 μg/m3, respectively. Carbonaceous aerosol is another major component of PM1, and total carbonaceous aerosol occupied to 27.5% of PMi mass. High OC and OC/EC ratio were found in Xi'an in comparison with the past studies in Hong Kong and Taipei. Factor analysis on the eight carbon fractions shows that coal combustion and gasoline automobile exhaust, diesel automobile exhaust, and biomass burning were found to be statistically significant and explained 93% of the carbonaceous aerosols contributions.
KW - Carbonaceous aerosol
KW - PMi
KW - Water-soluble ions
UR - https://www.scopus.com/pages/publications/67449122729
U2 - 10.4209/aaqr.2008.10.0050
DO - 10.4209/aaqr.2008.10.0050
M3 - 文章
AN - SCOPUS:67449122729
SN - 1680-8584
VL - 9
SP - 80
EP - 93
JO - Aerosol and Air Quality Research
JF - Aerosol and Air Quality Research
IS - 1
ER -