Comparison of particulate matter (PM<SUB>2.5</SUB> and PM<SUB>2.5-10</SUB>) between roadside air and ambient air using MCI(multi-nozzle cascade impactor) sampler

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  • マルチノズルカスケードインパクタ(MCI)サンプラーを用いた近年の道路沿道と一般環境における粒子状物質(PM<SUB>2.5</SUB>及びPM<SUB>2.5-10</SUB>)の比較
  • マルチノズルカスケードインパクタ(MCI)サンプラーを用いた近年の道路沿道と一般環境における粒子状物質(PM2.5及びPM2.5-10)の比較
  • マルチノズルカスケードインパクタ MCI サンプラー オ モチイタ キンネン ノ ドウロ エンドウ ト イッパン カンキョウ ニ オケル リュウシジョウ ブッシツ PM2 5 オヨビ PM2 5 10 ノ ヒカク

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Fine particles (PM2.5) and coarse particles were collected at six sites, composed with three pairs of roadside of route 17 in Saitama prefecture and ambient located within 4 km using Multi-nozzle cascade impactor (MCI) samplers. PM2.5 concentrations with MCI sampler were 5 % higher than those with FRM sampler. Correlation coefficient of PM2.5 concentration between at roadside and ambient was higher than that of PM2.5-10. However, PM2.5 concentration at ambient, especially Kisai located country side, was sometimes higher than that at roadside. It is probably caused by open burning of biomass after harvest. Sea-salt particles in PM2.5-10 were transported to Kisai located in the distance of 55 km from Tokyo bay in summer. It was cleared that the variation of concentrations of sulfate ion at six sites were extremely similar in summer and winter, by evaluation of coefficient of variation in all sampling periods. It shows that a large -scale pollution of sulfate, for example long distance transportation from Eastern Asia or another emission sources occurs.

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