Chemical Characteristics of Submicron Particles in Winter in Xi’an

Autor:	Suixin Liu, Junji Cao, Yuemei Han, Zhi Tong, Zhenxing Shen, Ting Zhang, Juan Zhou, Lingala Siva Sankara Reddy
Rok vydání:	2009
Předmět:	Total organic carbon Chemistry Analytical chemistry Coal combustion products chemistry.chemical_element Pollution Ion Diesel fuel Environmental chemistry Environmental Chemistry Mass concentration (chemistry) Gasoline Chemical composition Carbon
Zdroj:	Aerosol and Air Quality Research. 9:80-93
ISSN:	2071-1409 1680-8584
DOI:	10.4209/aaqr.2008.10.0050
Popis:	K + , Mg 2+ , Ca 2+ , F - , Cl - , Br - , NO2 - , NO3 - and SO4 2- ) 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 PM1 mass. Na + , NH4 + , Ca 2+ , Cl - , SO4 2- and NO3 - 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/m 3 and 4.6 ± 1.8 μg/m 3 , respectively. Carbonaceous aerosol is another major component of PM1, and total carbonaceous aerosol occupied to 27.5% of PM1 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.
Databáze:	OpenAIRE
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