Chemical Characterization of Ambient Particulate Matter near the World Trade Center: Elemental Carbon, Organic Carbon, and Mass Reconstruction
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- 作者：David A. Olson ; Gary A. Norris ; Matthew S. Landis ; and Alan F. Vette
- 刊名：Environmental Science & Technology
- 出版年：2004
- 出版时间：September 1, 2004
- 年：2004
- 卷：38
- 期：17
- 页码：4465 - 4473
- 全文大小：431K
- 年卷期：v.38,no.17(September 1, 2004)
- ISSN：1520-5851
文摘
Concentrations of elemental carbon (EC), organic carbonmatter (OM), particulate matter less than 2.5 
m (PM2.5),reconstructed soil, trace element oxides, and sulfate arereported from four locations near the World Trade Center(WTC) complex for airborne particulate matter (PM)samples collected from September 2001 through January2002. Across the four sampling sites, daily meanconcentrations ranged from 1.5 to 6.8 g/m3 for EC, from10.2 to 31.4 g/m3 for OM, and from 22.6 to 66.2 g/m3 forPM2.5. Highest concentrations of PM species weregenerally measured north and west of the WTC complex.Total carbon matter and sulfate constituted the largestfraction of reconstructed PM2.5 concentrations. Concentrationsof PM species across all sites decreased from theperiod when fires were present at the WTC complex(before December 19, 2001) to the period after the fires.Averaged over all sites, concentrations decreased by 25.6 g/m3 for PM2.5, 2.7 g/m3 for EC, and 9.2 g/m3 for OMfrom the fire period to after fire period.
m (PM2.5),reconstructed soil, trace element oxides, and sulfate arereported from four locations near the World Trade Center(WTC) complex for airborne particulate matter (PM)samples collected from September 2001 through January2002. Across the four sampling sites, daily meanconcentrations ranged from 1.5 to 6.8 g/m3 for EC, from10.2 to 31.4 g/m3 for OM, and from 22.6 to 66.2 g/m3 forPM2.5. Highest concentrations of PM species weregenerally measured north and west of the WTC complex.Total carbon matter and sulfate constituted the largestfraction of reconstructed PM2.5 concentrations. Concentrationsof PM species across all sites decreased from theperiod when fires were present at the WTC complex(before December 19, 2001) to the period after the fires.Averaged over all sites, concentrations decreased by 25.6 g/m3 for PM2.5, 2.7 g/m3 for EC, and 9.2 g/m3 for OMfrom the fire period to after fire period.