|
KMID : 1156220110370010029
|
|
Journal of Environmental Health Sciences
2011 Volume.37 No. 1 p.29 ~ p.43
|
|
|
Seasonal Characteristics of Atmospheric PM10 and PM2.5 in Iksan, Korea
|
|
Kang Gong-Unn
Kim Nam-Song
Shin Eun-Sang
|
|
|
Abstract
|
|
|
|
The seasonal characteristics of atmospheric particulate matter (PM) were evaluated through the measurement of (particles with an aerodynamic diameter of less than 10 ) and (particles with an aerodynamic diameter of less than 2.5 ) collected in the downtown area of Iksan city over roughly two weeks in each season of 2004. During the sampling period, 54 samples of and were collected and then measured for mass concentrations of PM and its water-soluble inorganic ion species. The concentrations of and were highly variable on a daily time scale in all seasons, especially in fall. Annual concentrations of and were and , respectively. The daily concentrations of the analyzed ions similarly showed a pronounced variation, although a difference between seasons existed. Among them, , and were the most abundant ions in all seasons, contributing up to 32% of and 39% of . The contribution of and showed a seasonal variation, as was the highest during spring and summer and was the highest during fall and winter. Non-seasalt and were found to exist mainly as neutralized chemical components of and due to the high concentration of in PM samples, which were a major form of airborne PM in all seasons. Seasonal characteristics of and in Iksan were described in relation to the temporal variations of daily concentration of PM and its inorganic ion species including inter-particle reactions.
|
|
|
KEYWORD
|
|
|
PM 10, PM2.5, Inorganic ion species, (NH4)2 SO 4, NH4 NO 3
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|