Size distribution and anthropogenic sources apportionment of airborne trace metals in Kanazawa,Japan |
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| Institution: | 1. Gansu Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;2. Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;3. School of environment, Harbin Institute of Technology, Harbin 150090, China;1. Aix Marseille Univ, CNRS, LCE, Marseille, France;2. French Environment and Energy Management Agency, 20 avenue du Grésillé-BP, 90406 49004 Angers Cedex 01, France;3. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), 5232 Villigen-PSI, Switzerland;4. Geological Survey of Spain, Zaragoza IGME Unit, 50006 Zaragoza, Spain;5. Natural Environment Research Council, Centre for Ecology & Hydrology, Penicuik, UK;6. AirPACA, Air Quality Observatory in Provence Alpes Côte d''Azur, 13006 Marseille, France;7. Université Grenoble Alpes, CNRS, IRD, IGE, 38402 St-Martin d''Hères, France |
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| Abstract: | Aerosol samples were collected from Kanazawa, Japan to examine the size distribution of 12 elements and to identify the major sources of anthropogenic elements. Key emission sources were identified and, concentrations contributed from individual sources were estimated as well. Concentrations of elements V, Ca, Cd, Fe, Ba, Mg, Mn, Pb, Sr, Zn, Co and Cu in aerosols were determined with ICP-MS. The results showed that Ca, Mg, Sr, Mn, Co and Fe were mainly associated with coarse particles (>2.1 μm), primarily from natural sources. In contrast, the elements Zn, Ba, Cd, V, Pb and Cu dominated in fine aerosol particles (<2.1 μm), implying that the anthropogenic origin is the dominant source. Results of the factor analysis on elements with high EFCrust values (>10) showed that emissions from waste combustion in incinerators, oil combustion (involving waste oil burning and oil combustion in both incinerators and electricity generation plants), as well as coal combustion in electricity generation plants were major contributors of anthropogenic metals in the ambient atmosphere in Kanazawa. Quantitatively estimated sum of mean concentrations of anthropogenic elements from the key sources were in good agreement with the observed values. Results of this study elucidate the need for making pollution control strategy in this area. |
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