Analysis of Major Inorganic Ion Components of Atmospheric Particulate Matter in Sanyo Onoda, Yamaguchi, Japan
2015; Japan Society for Analytical Chemistry; Volume: 64; Issue: 10 Linguagem: Inglês
10.2116/bunsekikagaku.64.775
ISSN0525-1931
AutoresHitoshi Asano, Takashi Hasegawa, Yukihide Shiraishi,
Tópico(s)Air Quality Monitoring and Forecasting
ResumoAtmospheric particulate matter was collected so as to investigate inorganic ion components (SO42−, NO3−, NH4+, Na+, Cl−, K+, Mg2+, and Ca2+) from March 2013 to February 2014 in SanyoOnoda, Yamaguchi, Japan. SO42−, NO3−, and NH4+ were the dominant ionic species, which accounted for 45%, 23%, and 8% of the total mass of the ion components, respectively. The PM2.5 mass concentrations ranged from 3 μg m−3 to 66 μg m−3, with an annual mean concentration of 21.2 μg m−3. A strong correlation was obtained between the anthropogenic components and PM2.5. Seasonal variations of the ion components and PM2.5 were significant, with the highest concentration being in the spring and the lowest in the summer. The meteorological conditions, such as the rainfall, typhoon, wind direction, and temperature effect the concentration of particulate matter. With wind from the western direction (from west-southwest to north-northwest) the concentration of particulate matter was higher by transport of air mass from the Asian continent. These results suggested a high concentration of particulate matter that was dominated by transboundary air pollution.
Referência(s)