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Transboundary and local air pollutants in Western Japan distinguished on the basis of ratios of metallic elements in size-segregated aerosols

Title
Transboundary and local air pollutants in Western Japan distinguished on the basis of ratios of metallic elements in size-segregated aerosols
Authors
Taniguchi Y.Shimada K.Takami A.Lin N.-H.Chan C.K.Kim Y.P.Hatakeyama S.
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2017
Journal Title
Aerosol and Air Quality Research
ISSN
1680-8584JCR Link
Citation
vol. 17, no. 12, pp. 3141 - 3150
Keywords
Chemical composition of metallic elementsDifference in transboundary and local pollutionElemental ratiosSize-segregated aerosol analysis
Publisher
AAGR Aerosol and Air Quality Research
Indexed
SCIE; SCOPUS scopus
Abstract
Trace metals in aerosols were observed at an urban site (Kumamoto, Kyushu, Japan) and a rural site (Cape Hedo, Okinawa, Japan) to investigate the relative contributions of transboundary air pollutants from mainland Asia and local air pollutants in western Japan. We used a cascade impactor to collect aerosols in five size classes. We apportioned the sources of the air masses on the basis of elemental components. Transboundary and local air pollutants were distinguished by use of the Pb/Cu and V/As ratios in selected size fractions of aerosols. The contribution of Pb (primarily from coal combustion in China) to total anthropogenic elements was greatest in spring, autumn, and winter in the 0.5–1 µm size fraction at both collection sites. The atmospheric environment at both sites was affected by this transboundary air pollutant. The contribution of Cu (primarily from local vehicle traffic) to total anthropogenic elements was greatest in all seasons in the 2.5–10 µm fraction at Kumamoto. Local air pollutants such as road dust, automobile brake abrasion, and waste incineration affected ambient air quality in Kumamoto. Because these pollutants resided mainly in the coarse aerosol fraction (> 2.5 µm), most of them were not transported to Cape Hedo in air bodies that we were able to trace to Kumamoto by backward projection. Based on our data the ambient air quality at Cape Hedo was little affected by local air pollutants emitted in the Kumamoto area. © Taiwan Association for Aerosol Research.
DOI
10.4209/aaqr.2016.12.0578
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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