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Anthropogenic contribution of magnetic particulates in urban roadside dust

Authors
Kim, WonnyonDoh, Seong-JaeYu, Yongjae
Issue Date
Jun-2009
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Apparent magnetic concentration; Carbon-bearing iron-oxide; Environmental pollution; Magnetic pollution map
Citation
ATMOSPHERIC ENVIRONMENT, v.43, no.19, pp 3137 - 3144
Pages
8
Indexed
SCIE
SCOPUS
Journal Title
ATMOSPHERIC ENVIRONMENT
Volume
43
Number
19
Start Page
3137
End Page
3144
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/119901
DOI
10.1016/j.atmosenv.2009.02.056
ISSN
1352-2310
1873-2844
Abstract
Environmental magnetism parameters have been optimized as qualitative proxy indicators of the distribution of anthropogenic particulates, heavy metals and/or organic materials. In the present study, we propose a quantitative magnetic proxy which is suitable for the monitoring of spatial and temporal pollution patterns in urban areas. A total of 1353 roadside dust samples were collected from Seoul, Korea for 13 months. Thermomagnetic data and intensive electron microscopy identified a predominance of carbon-bearing iron-oxides, indicating that anthropogenic particulates mostly originated from fossil fuel combustions. To quantify anthropogenic particulates, an apparent magnetic concentration [AMC(Fe3O4) = observed saturation magnetization (M-s)/M-s of Fe3O4( = 92.36 Am-2 kg(-1))] was calculated. AMC(Fe3O4) showed distinctive spatial and seasonal dependences: highest in industrial areas and lowest in park areas; and maximum in winter and minimum in summer. Seasonal mapping using AMC(Fe3O4) illustrated that industries in southwestern Seoul were the major pollution source. In addition, dominant westerly winds possibly transported pollutants along topographically lower areas in Seoul. (C) 2009 Elsevier Ltd. All rights reserved.
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