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http://dx.doi.org/10.5389/KSAE.2022.64.3.025

Characteristics of Fine Particulate Matter (PM2.5) in the Atmosphere of Saemangum Reclaimed Land Area  

Song, Ji-Han (Department of Environmental Engineering, Hanseo University)
Kim, Jeong-Soo (Department of Environmental Engineering, Hanseo University)
Hong, Sung-Chang (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Kim, Jin-Ho (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.64, no.3, 2022 , pp. 25-32 More about this Journal
Abstract
To understand the distribution characteristics of PM2.5 concentration in the Saemangeum Reclamation Area and nearby areas, three points of the background area, the occurrence area, and the affected area were selected and samples were collected for each season. The chemical composition was determined. As a result of analyzing the chemical composition contained in PM2.5, NO3- (7.2 ㎍/m3), SO42- (4.3 ㎍/m3), NH4+ (4.3 ㎍/m3), OC (2.5 ㎍/m3), Si (1.3 ㎍/m3) m3) and EC (0.5 ㎍/m3) seemed to be the main components, and NO3-, SO42-, NH4+, which are components that form secondary particles, occupied a large proportion. The composition ratio of PM2.5 was investigated in the order of ion component (56.8%) > Unknown (27.4%) > carbon component (11.8%) > heavy metal component (4.0%). During the PM2.5 high concentration case days, the ionic component accounted for 90.7% during atmospheric stagnation cases, whereas the chemical composition ratio was in the order of ionic component (51.7%) > heavy metal component (41.5%) > carbon component (6.8%) during yellow dust cases. It was found that the characteristic of PM2.5 in the Saemangeum reclaimed land and surrounding areas is mainly influenced by outside (domestic and overseas) throughout the year. Ion components accounted for the largest portion of PM2.5 components in this area, but there were few sources of SOx and NOx emission in the Seamangeum area, which are precursors for secondary particle formation. Therefore, it is judged that most of these are generated and influenced as a secondary reaction in the atmosphere from the outside.
Keywords
Saemangeum reclaimed land; $PM_{2.5}$; ions; metals; OC; EC;
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