Toxic Elements of Fine Particles PM2.5 in Ambient Air at Six Sites in Tokyo, Japan.
| Accession number;04A0373136 |
| Title;Toxic Elements of Fine Particles PM2.5 in Ambient Air at Six Sites in Tokyo, Japan. |
| Author;KURITA MASAYUKI(Tokyotokenkoanzenkense) OHASHI NORIO(Tokyotokenkoanzenkense) UEHARA SHIN'ICHI(Tokyotokenkoanzenkense) |
Journal Title;Annual Report of Tokyo Metropolitan Institute of Public Health
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Journal Code:G0682A
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ISSN:1348-9046
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VOL.;NO.54;PAGE.315-318(2003)
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| Figure&Table&Reference;FIG.2, TBL.1, REF.7 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Fine particle samples with an aerodynamic diameter of less than 2.5 .MU.m (PM2.5) were collected over 72-h periods beginning at 9AM on the third Monday of each month between January 2001 and April 2002. A concentration of 12 elements, Al, V, Mn, Fe, Ni, Cu, Zn, As, Cd, Pb, Sb, and Ba, was determined from all PM2.5 samples by ICP-AES or ICP-MS. Our study compared the spatial variations in the mass and the toxic elements of ambient air PM2.5 at six sites: Ohshima, Ome, Kodaira, Machida, Ota, and Adachi, covering areas of rural-background to urban-industrial, in Tokyo, Japan. The PM2.5 concentrations ranged from 8.7 .MU.g/m3 at Ohshima to 52.8 .MU.g/m3 at Adachi. By Tukey's multiple comparison test, the PM2.5 level in Adachi was statistically significant compared to the levels at the other sites (p<0.05). Although the elemental concentrations detected did not exceed the levels that cause acute or chronic health effects, Zn, Cd, and Pb concentrations showed an increasing gradient from Ohshima to Adachi. In correlations between the toxic elements transformed to logarithmic levels, strong associations (r>0.85) were found among Zn, Cd, and Pb, which are known to be emitted by refuse incinerators. These results suggest that PM2.5 originating from refuse incinerators has to be recognized as a contributing factor to the urban air pollution problem in Tokyo. (author abst.) |
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